1
|
Chen X, Han C, Yang R, Wang X, Ma J, Wang Y. Influence of the transcription factor ABI5 on growth and development in Arabidopsis. JOURNAL OF PLANT PHYSIOLOGY 2024; 302:154316. [PMID: 39098091 DOI: 10.1016/j.jplph.2024.154316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 07/19/2024] [Accepted: 07/20/2024] [Indexed: 08/06/2024]
Abstract
ABA-insensitive 5 (ABI5) belongs to the basic leucine zipper class of transcription factors and is named for being the fifth identified Arabidopsis mutant unresponsive to ABA. To understand the influence of ABI5 in its active state on downstream gene expression and plant growth and development, we overexpressed the full-length ABI5 (A.t.MX-4) and the active forms of ABI5 with deleted transcriptional repression domains (A.t.MX-1, A.t.MX-2, and A.t.MX-3). Compared with the wild type, A.t.MX-1, A.t.MX-2, and A.t.MX-3 exhibited an increase in rosette leaf number and size, earlier flowering, increased thousand-seed weight, and significantly enhanced drought resistance. Thirty-five upregulated/downregulated proteins in the A.t.MX-1 were identified by proteomic analysis, and these proteins were involved in ABA biosynthesis and degradation, abiotic stress, fatty acid synthesis, and energy metabolism. These proteins participate in the regulation of plant drought resistance, flowering timing, and seed size at the levels of transcription and post-translational modification.
Collapse
Affiliation(s)
- Xin Chen
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China
| | - Changze Han
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China
| | - Rongrong Yang
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China
| | - Xinwen Wang
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China
| | - Jianzhong Ma
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China.
| | - Yonggang Wang
- School of Life Science and Engineering, Lanzhou University of Technology, LanZhou, 730050, China.
| |
Collapse
|
2
|
Wang L, Lin Y, Hou G, Yang M, Peng Y, Jiang Y, He C, She M, Chen Q, Li M, Zhang Y, Zhang Y, Wang Y, He W, Wang X, Tang H, Luo Y. A histone deacetylase, FaSRT1-2, plays multiple roles in regulating fruit ripening, plant growth and stresses resistance of cultivated strawberry. PLANT, CELL & ENVIRONMENT 2024; 47:2258-2273. [PMID: 38482979 DOI: 10.1111/pce.14885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 04/30/2024]
Abstract
Sirtuins (SRTs) are a group of nicotinamide adenine dinucleotide (NAD+)-dependent deacetylase that target both histone and nonhistone proteins. The biological function of SRT in horticultural plants has been rarely studied. In this study, FaSRT1-2 was identified as a key member of the 8 FaSRTs encoded in cultivated strawberry genome. Transient overexpression of FaSRT1-2 in strawberry fruit accelerated ripening, increased the content of anthocyanins and sugars, enhanced ripening-related gene expression. Moreover, stable transformation of FaSRT1-2 in strawberry plants resulted in enhanced vegetative growth, increased sensitivity to heat stress and increased susceptibility to Botrytis cinerea infection. Interestingly, knocking out the homologous gene in woodland strawberry had the opposite effects. Additionally, we found the content of stress-related hormone abscisic acid (ABA) was decreased, while the growth-related gibberellin (GA) concentration was increased in FaSRT1-2 overexpression lines. Gene expression analysis revealed induction of heat shock proteins, transcription factors, stress-related and antioxidant genes in the FaSRT1-2-overexpressed plants while knocked-out of the gene had the opposite impact. In conclusion, our findings demonstrated that FaSRT1-2 could positively promote strawberry plant vegetative growth and fruit ripening by affecting ABA and GA pathways. However, it negatively regulates the resistance to heat stress and B. cinerea infection by influencing the related gene expression.
Collapse
Affiliation(s)
- Liangxin Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuanxiu Lin
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Guoyan Hou
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Min Yang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuting Peng
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuyan Jiang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Caixia He
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Musha She
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Wen He
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| |
Collapse
|
3
|
Bao A, Jiao T, Hu T, Cui K, Yue W, Liu Y, Zeng H, Zhang J, Han S, Wu M. Cloning of the Arabidopsis SMAP2 promoter and analysis of its expression activity. Sci Rep 2024; 14:11451. [PMID: 38769443 PMCID: PMC11106232 DOI: 10.1038/s41598-024-61525-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 05/07/2024] [Indexed: 05/22/2024] Open
Abstract
The SMALL ACIDIC PROTEIN (SMAP) gene is evolutionarily indispensable for organisms. There are two copies of the SMAP gene in the Arabidopsis thaliana genome, namely, SMAP1 and SMAP2. The function of SMAP2 is similar to that of SMAP1, and both can mediate 2,4-D responses in the root of Arabidopsis. This study cloned the AtSMAP2 genetic promoter sequence. Two promoter fragments of different lengths were designed according to the distribution of their cis-acting elements, and the corresponding β- glucuronidase (GUS) expression vector was constructed. The expression activity of promoters of two lengths, 1993 bp and 997 bp, was studied by the genetic transformation in Arabidopsis. The prediction results of cis-acting elements in the promoter show that there are many hormone response elements in 997 bp, such as three abscisic acid response elements ABRE, gibberellin response elements P-box and GARE-motif and auxin response element AuxRR-core. Through GUS histochemical staining and qRT‒PCR analysis, it was found that the higher promoter activity of PAtSMAP2-997, compared to PAtSMAP2-1993, drove the expression of GUS genes at higher levels in Arabidopsis, especially in the root system. The results provide an important basis for subsequent studies on the regulation of AtSMAP2 gene expression and biological functions.
Collapse
Affiliation(s)
- Anar Bao
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Tongtong Jiao
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Ting Hu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Kai Cui
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
- TECON Pharmaceutical Co., Ltd., Suzhou, 215000, People's Republic of China
| | - Weijie Yue
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Yanxi Liu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Hua Zeng
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Jinhong Zhang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Shining Han
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Ming Wu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, People's Republic of China.
| |
Collapse
|
4
|
Zhu P, Fan Y, Xu P, Fan G. Bioinformatic Analysis of the BTB Gene Family in Paulownia fortunei and Functional Characterization in Response to Abiotic and Biotic Stresses. PLANTS (BASEL, SWITZERLAND) 2023; 12:4144. [PMID: 38140471 PMCID: PMC10747981 DOI: 10.3390/plants12244144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023]
Abstract
To learn about the gene structure, phylogenetic evolution, and function under biotic and abiotic stresses of BTB (Bric-a-Brac/Tramtrack/Broad Complex) genes in Paulownia fortunei, a whole-genome sequence evaluation was carried out, and a total of 62 PfBTB genes were identified. The phylogenetic analysis showed that PfBTB proteins are divided into eight groups, and these proteins are highly conserved. PfBTB genes were unevenly distributed on 17 chromosomes. The colinearity analysis found that fragment replication and tandem replication are the main modes of gene amplification in the PfBTB family. The analysis of cis-acting elements suggests that PfBTB genes may be involved in a variety of biological processes. The transcriptomic analysis results showed that PfBTB3/12/14/16/19/36/44 responded to Paulownia witches' broom (PaWB), while PfBTB1/4/17/43 responded to drought stress, and the RT-qPCR results further support the reliability of transcriptome data. In addition, the association analysis between miRNA and transcriptome revealed a 91-pair targeting relationship between miRNAs and PfBTBs. In conclusion, the BTB genes in Paulownia are systematically identified in this research. This work provides useful knowledge to more fully appreciate the potential functions of these genes and their possible roles in the occurrence of PaWB and in response to stress.
Collapse
Affiliation(s)
- Peipei Zhu
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China; (P.Z.); (Y.F.)
- Institute of Paulownia, Henan Agricultural University, Zhengzhou 450002, China
| | - Yujie Fan
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China; (P.Z.); (Y.F.)
- Institute of Paulownia, Henan Agricultural University, Zhengzhou 450002, China
| | - Pingluo Xu
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China; (P.Z.); (Y.F.)
- Institute of Paulownia, Henan Agricultural University, Zhengzhou 450002, China
| | - Guoqiang Fan
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China; (P.Z.); (Y.F.)
- Institute of Paulownia, Henan Agricultural University, Zhengzhou 450002, China
| |
Collapse
|
5
|
Zhang Z, Luo S, Liu Z, Wan Z, Gao X, Qiao Y, Yu J, Zhang G. Genome-wide identification and expression analysis of the cucumber PYL gene family. PeerJ 2022; 10:e12786. [PMID: 35047239 PMCID: PMC8759363 DOI: 10.7717/peerj.12786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 12/21/2021] [Indexed: 01/10/2023] Open
Abstract
Abscisic acid (ABA) is a very important hormone in plants. It regulates growth and development of plants and plays an important role in biotic and abiotic stresses. The Pyrabactin resistance 1-like (PYR/PYL) proteins play a central role in ABA signal transduction pathways. The working system of PYL genes in cucumber, an important economical vegetable (Cucumis sativus L.), has not been fully studied yet. Through bioinformatics, a total of 14 individual PYL genes were identified in Chinese long '9930' cucumber. Fourteen PYL genes were distributed on six chromosomes of cucumber, and their encoded proteins predicted to be distributed in cytoplasm and nucleus. Based on the phylogenetic analysis, the PYL genes of cucumber, Arabidopsis, rice, apple, Brachypodium distachyon and soybeancould be classified into three groups. Genetic structures and conserved domains analysis revealed that CsPYL genes in the same group have similar exons and conserved domains. By predicting cis-elements in the promoters, we found that all CsPYL members contained hormone and stress-related elements. Additionally, the expression patterns of CsPYL genes were specific in tissues. Finally, we further examined the expression of 14 CsPYL genes under ABA, PEG, salt stress. The qRT-PCR results showed that most PYL gene expression levels were up-regulated. Furthermore, with different treatments about 3h, the relative expression of PYL8 was up-regulated and more than 20 times higher than 0h. It indicated that this gene may play an important role in abiotic stress.
Collapse
Affiliation(s)
- Zeyu Zhang
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Shilei Luo
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Zeci Liu
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Zilong Wan
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Xueqin Gao
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Yali Qiao
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Jihua Yu
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Guobin Zhang
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China,College of Horticulture, Gansu Agricultural University, Lanzhou, China
| |
Collapse
|
6
|
Appels R, Wang P, Islam S. Integrating Wheat Nucleolus Structure and Function: Variation in the Wheat Ribosomal RNA and Protein Genes. FRONTIERS IN PLANT SCIENCE 2021; 12:686586. [PMID: 35003148 PMCID: PMC8739226 DOI: 10.3389/fpls.2021.686586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
We review the coordinated production and integration of the RNA (ribosomal RNA, rRNA) and protein (ribosomal protein, RP) components of wheat cytoplasmic ribosomes in response to changes in genetic constitution, biotic and abiotic stresses. The components examined are highly conserved and identified with reference to model systems such as human, Arabidopsis, and rice, but have sufficient levels of differences in their DNA and amino acid sequences to form fingerprints or gene haplotypes that provide new markers to associate with phenotype variation. Specifically, it is argued that populations of ribosomes within a cell can comprise distinct complements of rRNA and RPs to form units with unique functionalities. The unique functionalities of ribosome populations within a cell can become central in situations of stress where they may preferentially translate mRNAs coding for proteins better suited to contributing to survival of the cell. In model systems where this concept has been developed, the engagement of initiation factors and elongation factors to account for variation in the translation machinery of the cell in response to stresses provided the precedents. The polyploid nature of wheat adds extra variation at each step of the synthesis and assembly of the rRNAs and RPs which can, as a result, potentially enhance its response to changing environments and disease threats.
Collapse
Affiliation(s)
- Rudi Appels
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC, Australia
- Faculty of Veterinary and Agricultural Science, Melbourne, VIC, Australia
| | - Penghao Wang
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Shahidul Islam
- Centre for Crop Innovation, Food Futures Institute, Murdoch University, Murdoch, WA, Australia
| |
Collapse
|
7
|
Abstract
Currently, the world is facing high competition and market risks in improving yield, crop illness, and crop water stress. This could potentially be addressed by technological advancements in the form of precision systems, improvements in production, and through ensuring the sustainability of development. In this context, remote-sensing systems are fully equipped to address the complex and technical assessment of crop production, security, and crop water stress in an easy and efficient way. They provide simple and timely solutions for a diverse set of ecological zones. This critical review highlights novel methods for evaluating crop water stress and its correlation with certain measurable parameters, investigated using remote-sensing systems. Through an examination of previous literature, technologies, and data, we review the application of remote-sensing systems in the analysis of crop water stress. Initially, the study presents the relationship of relative water content (RWC) with equivalent water thickness (EWT) and soil moisture crop water stress. Evapotranspiration and sun-induced chlorophyll fluorescence are then analyzed in relation to crop water stress using remote sensing. Finally, the study presents various remote-sensing technologies used to detect crop water stress, including optical sensing systems, thermometric sensing systems, land-surface temperature-sensing systems, multispectral (spaceborne and airborne) sensing systems, hyperspectral sensing systems, and the LiDAR sensing system. The study also presents the future prospects of remote-sensing systems in analyzing crop water stress and how they could be further improved.
Collapse
|
8
|
Iqbal N, Umar S, Khan NA, Corpas FJ. Crosstalk between abscisic acid and nitric oxide under heat stress: exploring new vantage points. PLANT CELL REPORTS 2021; 40:1429-1450. [PMID: 33909122 DOI: 10.1007/s00299-021-02695-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/05/2021] [Indexed: 05/22/2023]
Abstract
Heat stress adversely affects plants growth potential. Global warming is reported to increase in the intensity, frequency, and duration of heatwaves, eventually affecting ecology, agriculture and economy. With an expected increase in average temperature by 2-3 °C over the next 30-50 years, crop production is facing a severe threat to sub-optimum growth conditions. Abscisic acid (ABA) and nitric oxide (NO) are growth regulators that are involved in the adaptation to heat stress by affecting each other and changing the adaptation process. The interaction between these molecules has been discussed in various studies in general or under stress conditions; however, regarding high temperature, their interaction has little been worked out. In the present review, the focus is shifted on the role of these molecules under heat stress emphasizing the different possible interactions between ABA and NO as both regulate stomatal closure and other molecules including hydrogen peroxide (H2O2), hydrogen sulfide (H2S), antioxidants, proline, glycine betaine, calcium (Ca2+) and heat shock protein (HSP). Exploring the crosstalk between ABA and NO with other molecules under heat stress will provide us with a comprehensive knowledge of plants mechanism of heat tolerance which could be useful to develop heat stress-resistant varieties.
Collapse
Affiliation(s)
- Noushina Iqbal
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India.
| | - Shahid Umar
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, 18080, Granada, Spain.
| |
Collapse
|
9
|
Cheng J, Wei F, Zhang M, Li N, Song T, Wang Y, Chen D, Xiang J, Zhang X. Identification of a 193 bp promoter region of TaNRX1-D gene from common wheat that contributes to osmotic or ABA stress inducibility in transgenic Arabidopsis. Genes Genomics 2021; 43:1035-1048. [PMID: 34143419 DOI: 10.1007/s13258-021-01115-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 05/18/2021] [Indexed: 01/12/2023]
Abstract
BACKGROUND Cloning and characterizing the drought-inducible promoters is essential for their use in crop resistance's genetic improvement. Previous studies have shown that the TaNRX1-D gene participates in regulating the response of wheat to drought stress. However, its promoter has not yet been identified. OBJECTIVE In this study, we aimed to characterize the promoter of the TaNRX1-D gene. METHODS The promoter of TaNRX1-D (named P0, 2081 bp) was isolated from common wheat with several cis-acting elements that regulate in response to abiotic stresses and some core cis-acting elements. Functional verification of the promoter, eight 5'-deletion fragments of TaNRX1-D promoter, was fused to the β-glucuronidase (GUS) gene P0::GUS ~ P7::GUS and transformed into Arabidopsis, respectively. Agrobacterium-mediated GUS transient assay the P6a and P6b promoter regions in tobacco leaves under normal, osmotic or ABA stress. RESULTS Activity analysis of the full-length promoter (P0) showed that the intensity of stronger β-glucuronidase (GUS) staining in the roots and leaves was obtained during the growth of transgenic Arabidopsis. P0::GUS displayed the GUS activity was much higher in the roots and leaves than in other parts of the transgenic plant under normal conditions, which was similarly within wheat. Analysis of the 5'-deletion fragments revealed that P0::GUS ~ P6::GUS responded well upon exposure to osmotic (polyethylene glycol-6000, PEG6000) and abscisic acid (ABA) stress treatments and expressed significantly higher GUS activity than the CaMV35S promoter (35S::GUS), while P7::GUS did not. GUS transient assay in tobacco leaves showed that the GUS activities of P6a and P6b were lower than P6 in the PEG6000 and ABA stresses. CONCLUSION The 193 bp (P6) segment was considered the core region of TaNRX1-D responding to PEG6000 or ABA treatment. GUS activity assay in transgenic Arabidopsis showed that this segment was sufficient for the PEG6000 or ABA stress response. The identified 193 bp promoter of TaNRX1-D in this study will help breed osmotic or ABA tolerant crops. The 36 bp segment between P6 and P6b (-193 to -157 bp) was considered the critical sequence for the TaNRX1-D gene responding to PEG6000 or ABA treatment.
Collapse
Affiliation(s)
- Jie Cheng
- College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Fan Wei
- College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Mingfei Zhang
- Academy of Agricultural Sciences/Key Laboratory of Agro-Ecological Protection & Exploitation and Utilization of Animal and Plant Resources in Eastern Inner Mongolia, Chi Feng University, Chifeng, China
| | - Nan Li
- Academy of Agricultural Sciences/Key Laboratory of Agro-Ecological Protection & Exploitation and Utilization of Animal and Plant Resources in Eastern Inner Mongolia, Chi Feng University, Chifeng, China
| | - Tianqi Song
- College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yong Wang
- College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Dongsheng Chen
- The Crop Research Institute, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, 750002, Ningxia, China
| | - Jishan Xiang
- Academy of Agricultural Sciences/Key Laboratory of Agro-Ecological Protection & Exploitation and Utilization of Animal and Plant Resources in Eastern Inner Mongolia, Chi Feng University, Chifeng, China.
| | - Xiaoke Zhang
- College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| |
Collapse
|
10
|
Wang C, Song B, Dai Y, Zhang S, Huang X. Genome-wide identification and functional analysis of U-box E3 ubiquitin ligases gene family related to drought stress response in Chinese white pear (Pyrus bretschneideri). BMC PLANT BIOLOGY 2021; 21:235. [PMID: 34039263 PMCID: PMC8152096 DOI: 10.1186/s12870-021-03024-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The plant U-box (PUB) proteins are a family of ubiquitin ligases (E3) enzymes that involved in diverse biological processes, as well as in responses to plant stress response. However, the characteristics and functional divergence of the PUB gene family have not yet been previously studied in the Chinese white pear (Pyrus bretschneideri). RESULTS In the present study, we identified 62 PbrPUBs in Chinese white pear genome. Based on the phylogenetic relationship, 62 PUB genes were clustered into five groups. The results of conserved motif and gene structure analysis supported the classification phylogenetic tree. The PbrPUB genes were unevenly distribution on 17 pear chromosomes, chromosome 15 housed most member of PUB family, with eight PUB genes. Cis-acting element analysis indicated that PUB genes might participate in diverse biological processes, especially in the response to abiotic stresses. Based on RNA-data from 'Dangshansuli' at seven tissues, we found that PUB genes exhibited diverse of expression level in seven tissues, and qRT-PCR experiment further supported the reliable of RNA-Seq data. To identify candidate genes associated with resistance, we conducted qRT-PCR experiment the expression level of pear seed plant under four abiotic stresses, including: ABA, dehydration, salt and cold treatment. One candidate PUB gene associated with dehydration stress was selected to conduct further functional experiment. Subcellular localization revealed PbrPUB18 protein was located on cell nucleus. Furthermore, heterologous over-expression of PbrPUB18 in Arabidopsis indicated that the over-expression of PbrPUB18 could enhance resistance in drought treatment. In conclusions, we systematically identified the PUB genes in pear, and provided useful knowledge for functional identification of PUB genes in pear.
Collapse
Affiliation(s)
- Chunmeng Wang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095 China
| | - Bobo Song
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095 China
| | - Yuqin Dai
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095 China
| | - Shaoling Zhang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095 China
| | - Xiaosan Huang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095 China
| |
Collapse
|
11
|
Li X, Wu Z, Xiao S, Wang A, Hua X, Yu Q, Liu Y, Peng L, Yang Y, Wang J. Characterization of abscisic acid (ABA) receptors and analysis of genes that regulate rutin biosynthesis in response to ABA in Fagopyrum tataricum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 157:432-440. [PMID: 33202322 DOI: 10.1016/j.plaphy.2020.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/04/2020] [Indexed: 06/11/2023]
Abstract
Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) is a nutritional crop, which has high rutin, and is good for health. Until now, plant genetic engineering is insufficient for Tartary buckwheat. Abscisic acid (ABA), as one of phytohormones, is involved in the regulation of plant growth and development, and responses to diverse environmental challenges. Although ABA receptors have been well characterized in Arabidopsis, it is little understood in Tartary buckwheat. In this study, we identified 12 ABA receptors, designated as FtRCAR1 through FtRCAR12 in Tartary buckwheat. FtRCARs are divided into three subfamily. Based on the similarity, we could predict that FtRCARs comprise of the monomeric (FtRCAR1, 3, 4, 5, 9, 10, 11 and 12) and the dimeric (FtRCAR2, 7 and 8) state in solution. The analysis of the transcript pattern indicated that most of FtRCARs were significantly variable among the root, stem, leaf, flower and seed, while FtRCAR4 transcript was undetectable under in all tissues. The transcript levels of FtRCARs under ABA treatment indicated that most FtRCARs transcripts were depressed, indicating a possible feedback regulation of ABA signaling. The analysis of rutin biosynthesis related-genes indicated that ABA up-graduated CHS, CHI, F3'H, F3H and FLS transcript levels, while transcripts of 4CL and PAL were down-regulated. In addition, the transcription factors that mediated the rutin biosynthesis related-genes were also regulated by exogenous ABA. Thus, the identification and the characterization of FtRCARs would enable us to further understand the role of ABA signal in Tartary buckwheat.
Collapse
Affiliation(s)
- Xiaoyi Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Zenghui Wu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Shuya Xiao
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Anhu Wang
- Xichang University, Xichang 615013, Sichuan, China.
| | - Xinyue Hua
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Qin Yu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Yu Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Lu Peng
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Yi Yang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Jianmei Wang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| |
Collapse
|
12
|
Emanet M, Sen Ö, Taşkin IÇ, Çulha M. Synthesis, Functionalization, and Bioapplications of Two-Dimensional Boron Nitride Nanomaterials. Front Bioeng Biotechnol 2019; 7:363. [PMID: 31921797 PMCID: PMC6915082 DOI: 10.3389/fbioe.2019.00363] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/12/2019] [Indexed: 11/23/2022] Open
Abstract
Two-dimensional boron nitride nanostructures (2D-BNNs) have been increasingly investigated for their applications in several scientific and technological areas. This considerable interest is due to their unique physicochemical properties, which include high hydrophobicity, heat and electrical insulation, resistance to oxidation, antioxidation capacity, thermal conductivity, high chemical stability, mechanical strength, and hydrogen storage capacity. They are also used as fillers, antibacterial agents, protective coating agents, lubricants, boron neutron capture therapy agents, nanocarriers for drug delivery, and for the receptor phase in chemosensors. The investigations for their use in medicine and biomedicine are very promising, including cancer therapy and wound healing. In this review, 2D-BNNs synthesis and their surface modification strategies, biocompatibility, and bioapplication studies are discussed. Finally, a perspective for the future use of these novel nanomaterials in the biomedical field is provided.
Collapse
Affiliation(s)
| | | | | | - Mustafa Çulha
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey
| |
Collapse
|
13
|
Zhang Q, Kong X, Yu Q, Ding Y, Li X, Yang Y. Responses of PYR/PYL/RCAR ABA Receptors to Contrasting stresses, Heat and Cold in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2019; 14:1670596. [PMID: 31552801 PMCID: PMC6866694 DOI: 10.1080/15592324.2019.1670596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/13/2019] [Accepted: 09/17/2019] [Indexed: 05/19/2023]
Abstract
Plants growing in natural habitats have evolved a wide range of mechanisms to copy with environmental challenging, including biotic and abiotic stresses. Abiotic stresses-induced increases in Abscisic acid (ABA) levels in plants suffering from stresses, including drought, cold or heat stress. To explore the function of the core components in ABA signaling, we used the overexpression of RCARs transgenic plants to expose in heat or cold stress. In this study, overexpression of RCAR12 or RCAR13 (R12-OE or R13-OE) transgenic plants had higher germination and survival rate than the wild-type (WT) Arabidopsis, indicating that they are both positively responsive to the high temperature. And the heat shock genes HSP18.2 and HSP70 were significantly induced by RCAR12 or RCAR13. Further, the results inferred that the over-expression of RCAR12 or RCAR13 could tolerance the cold stress, through induction CBFs expressions, the cold-responsive genes when plants were challenged the cold tress. And when complementation of RCAR12 to the 1124 mutant (R12:1124), the results indicated that RCAR12 could recover the insensitivity of 1124 to heat and cold stresses. Hence, we propose that RCAR12 and RCAR13, the ABA receptors, may play the positive roles in regulating the extreme temperature, including cold and high temperature in Arabidopsis.
Collapse
Affiliation(s)
- Qian Zhang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
| | - Xiangge Kong
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
| | - Qin Yu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yongqiang Ding
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
| | - Xiaoyi Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yi Yang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, China
- CONTACT Yi Yang Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
14
|
Jehanzeb M, Zheng X, Miao Y. The Role of the S40 Gene Family in Leaf Senescence. Int J Mol Sci 2017; 18:ijms18102152. [PMID: 29035318 PMCID: PMC5666833 DOI: 10.3390/ijms18102152] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/04/2017] [Accepted: 10/11/2017] [Indexed: 01/03/2023] Open
Abstract
Senescence affect different traits of plants, such as the ripening of fruit, number, quality and timing of seed maturation. While senescence is induced by age, growth hormones and different environmental stresses, a highly organized genetic mechanism related to substantial changes in gene expression regulates the process. Only a few genes associated to senescence have been identified in crop plants despite the vital significance of senescence for crop yield. The S40 gene family has been shown to play a role in leaf senescence. The barley HvS40 gene is one of the senescence marker genes which shows expression during age-dependent as well as dark-induced senescence. Like barley HvS40, the Arabidopsis AtS40-3 gene is also induced during natural senescence as well as in response to treatment with abscisic acid, salicylic acid, darkness and pathogen attack. It is speculated that rice OsS40 has a similar function in the leaf senescence of rice.
Collapse
Affiliation(s)
- Muhammad Jehanzeb
- The Center for Molecular Cell and Systems Biology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Life Sciences, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
| | - Xiangzi Zheng
- The Center for Molecular Cell and Systems Biology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Life Sciences, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
| | - Ying Miao
- The Center for Molecular Cell and Systems Biology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Life Sciences, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
| |
Collapse
|
15
|
Han EH, Petrella DP, Blakeslee JJ. 'Bending' models of halotropism: incorporating protein phosphatase 2A, ABCB transporters, and auxin metabolism. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:3071-3089. [PMID: 28899081 DOI: 10.1093/jxb/erx127] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Salt stress causes worldwide reductions in agricultural yields, a problem that is exacerbated by the depletion of global freshwater reserves and the use of contaminated or recycled water (i.e. effluent water). Additionally, salt stress can occur as cultivated areas are subjected to frequent rounds of irrigation followed by periods of moderate to severe evapotranspiration, which can result in the heterogeneous aggregation of salts in agricultural soils. Our understanding of the later stages of salt stress and the mechanisms by which salt is transported out of cells and roots has greatly improved over the last decade. The precise mechanisms by which plant roots perceive salt stress and translate this perception into adaptive, directional growth away from increased salt concentrations (i.e. halotropism), however, are not well understood. Here, we provide a review of the current knowledge surrounding the early responses to salt stress and the initiation of halotropism, including lipid signaling, protein phosphorylation cascades, and changes in auxin metabolism and/or transport. Current models of halotropism have focused on the role of PIN2- and PIN1-mediated auxin efflux in initiating and controlling halotropism. Recent studies, however, suggest that additional factors such as ABCB transporters, protein phosphatase 2A activity, and auxin metabolism should be included in the model of halotropic growth.
Collapse
Affiliation(s)
- Eun Hyang Han
- Department of Horticulture and Crop Science, The Ohio State University/OARDC, Wooster, OH, USA
| | - Dominic P Petrella
- Department of Horticulture and Crop Science, The Ohio State University/OARDC, Wooster, OH, USA
| | - Joshua J Blakeslee
- Department of Horticulture and Crop Science, OARDC Metabolite Analysis Cluster (OMAC), The Ohio State University/OARDC, Wooster, OH, USA
| |
Collapse
|
16
|
Han X, Jiang L, Che C, Wan C, Lu H, Xiao Y, Xu Y, Chen Z, Qin Z. Design and Functional Characterization of a Novel Abscisic Acid Analog. Sci Rep 2017; 7:43863. [PMID: 28272449 PMCID: PMC5341028 DOI: 10.1038/srep43863] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 02/01/2017] [Indexed: 01/07/2023] Open
Abstract
The phytohormone abscisic acid (ABA) plays a crucial role in mediating plant growth and development by recruiting genetically redundant ABA receptors. To overcome its oxidation inactivation, we developed a novel ABA analog named 2',3'-benzo-iso-ABA (iso-PhABA) and studied its function and structural characterization with A. thaliana ABA receptors. The (+)-iso-PhABA form showed much higher ABA-like activities than (+)-ABA including inhibitory effects on the seed germination of lettuce and A. thaliana, wheat embryo germination and rice seedling elongation. The PP2C (protein phosphatases 2C) activity assay showed that (+)-iso-PhABA acted as a potent and selective ABA receptor agonist, which is preferred to PYL10. In some cases, (-)-iso-PhABA showed moderate to high activity for the PYL protein inhibiting PP2C activity, suggesting different mechanisms of action of iso-PhABA and ABA. The complex crystal structure of iso-PhABA with PYL10 was determined and elucidated successfully, revealing that (+)-iso-PhABA was better coordinated in the same binding pocket compared to (+)-ABA. Moreover, the detailed interaction network of iso-PhABA/PYL10 was disclosed and involves hydrogen bonds and multiple hydrophobic interactions that provide a robust framework for the design of novel ABA receptor agonists/antagonists.
Collapse
Affiliation(s)
- Xiaoqiang Han
- College of Science, China Agricultural University, Beijing, 100193, China
- College of Agricultural, Shihezi University, Shihezi, 832000, China
| | - Lun Jiang
- College of Biological Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing, 100193, China
| | - Chuanliang Che
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Chuan Wan
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Huizhe Lu
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Yumei Xiao
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Yanjun Xu
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Zhongzhou Chen
- College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Zhaohai Qin
- College of Science, China Agricultural University, Beijing, 100193, China
| |
Collapse
|
17
|
Guajardo E, Correa JA, Contreras-Porcia L. Role of abscisic acid (ABA) in activating antioxidant tolerance responses to desiccation stress in intertidal seaweed species. PLANTA 2016; 243:767-81. [PMID: 26687373 DOI: 10.1007/s00425-015-2438-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 11/23/2015] [Indexed: 05/10/2023]
Abstract
The hormone ABA regulates the oxidative stress state under desiccation in seaweed species; an environmental condition generated during daily tidal changes. Desiccation is one of the most important factors that determine the distribution pattern of intertidal seaweeds. Among most tolerant seaweed is Pyropia orbicularis, which colonizes upper intertidal zones along the Chilean coast. P. orbicularis employs diverse mechanisms of desiccation tolerance (DT) (among others, e.g., antioxidant activation, photoinhibition, and osmo-compatible solute overproduction) such as those used by resurrection plants and bryophytes. In these organisms, the hormone abscisic acid (ABA) plays an important role in regulating responses to water deficit, including gene expression and the activity of antioxidant enzymes. The present study determined the effect of ABA on the activation of antioxidant responses during desiccation in P. orbicularis and in the sensitive species Mazzaella laminarioides and Lessonia spicata. Changes in endogenous free and conjugated ABA, water content during the hydration-desiccation cycle, enzymatic antioxidant activities [ascorbate peroxidase (AP), catalase (CAT) and peroxiredoxine (PRX)], and levels of lipid peroxidation and cell viability were evaluated. The results showed that P. orbicularis had free ABA levels 4-7 times higher than sensitive species, which was overproduced during water deficit. Using two ABA inhibitors (sodium tungstate and ancymidol), ABA was found to regulate the activation of the antioxidant enzymes activities during desiccation. In individuals exposed to exogenous ABA the enzyme activity increased, concomitant with low lipid peroxidation and high cell viability. These results demonstrate the participation of ABA in the regulation of DT in seaweeds, and suggest that regulatory mechanisms with ABA signaling could be of great importance for the adaptation of these organisms to dehydration.
Collapse
Affiliation(s)
- Eduardo Guajardo
- Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile
| | - Juan A Correa
- Departamento de Ecología, and Center of Applied Ecology and Sustainability (CAPES), Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, Roscoff, France
| | - Loretto Contreras-Porcia
- Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile.
- Center of Applied Ecology and Sustainability (CAPES), Pontificia Universidad Católica de Chile, Santiago, Chile.
| |
Collapse
|
18
|
Sridharamurthy M, Kovach A, Zhao Y, Zhu JK, Xu HE, Swaminathan K, Melcher K. H2O2 inhibits ABA-signaling protein phosphatase HAB1. PLoS One 2014; 9:e113643. [PMID: 25460914 PMCID: PMC4252038 DOI: 10.1371/journal.pone.0113643] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/27/2014] [Indexed: 01/14/2023] Open
Abstract
Due to its ability to be rapidly generated and propagated over long distances, H2O2 is an important second messenger for biotic and abiotic stress signaling in plants. In response to low water potential and high salt concentrations sensed in the roots of plants, the stress hormone abscisic acid (ABA) activates NADPH oxidase to generate H2O2, which is propagated in guard cells in leaves to induce stomatal closure and prevent water loss from transpiration. Using a reconstituted system, we demonstrate that H2O2 reversibly prevents the protein phosphatase HAB1, a key component of the core ABA-signaling pathway, from inhibiting its main target in guard cells, SnRK2.6/OST1 kinase. We have identified HAB1 C186 and C274 as H2O2-sensitive thiols and demonstrate that their oxidation inhibits both HAB1 catalytic activity and its ability to physically associate with SnRK2.6 by formation of intermolecular dimers.
Collapse
Affiliation(s)
- Madhuri Sridharamurthy
- Laboratories of Structural Sciences/Structural Biology and Biochemistry, Van Andel Research Institute, N.E., Grand Rapids, Michigan, United States of America
- Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore
| | - Amanda Kovach
- Laboratories of Structural Sciences/Structural Biology and Biochemistry, Van Andel Research Institute, N.E., Grand Rapids, Michigan, United States of America
| | - Yang Zhao
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47906, United States of America
| | - Jian-Kang Zhu
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47906, United States of America
| | - H. Eric Xu
- Laboratories of Structural Sciences/Structural Biology and Biochemistry, Van Andel Research Institute, N.E., Grand Rapids, Michigan, United States of America
- State Key Laboratory of Drug Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Kunchithapadam Swaminathan
- Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore
- * E-mail: (KS); (KM)
| | - Karsten Melcher
- Laboratories of Structural Sciences/Structural Biology and Biochemistry, Van Andel Research Institute, N.E., Grand Rapids, Michigan, United States of America
- * E-mail: (KS); (KM)
| |
Collapse
|
19
|
Yu LH, Miao ZQ, Qi GF, Wu J, Cai XT, Mao JL, Xiang CB. MADS-box transcription factor AGL21 regulates lateral root development and responds to multiple external and physiological signals. MOLECULAR PLANT 2014; 7:1653-1669. [PMID: 25122697 PMCID: PMC4228986 DOI: 10.1093/mp/ssu088] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Plant root system morphology is dramatically influenced by various environmental cues. The adaptation of root system architecture to environmental constraints, which mostly depends on the formation and growth of lateral roots, is an important agronomic trait. Lateral root development is regulated by the external signals coordinating closely with intrinsic signaling pathways. MADS-box transcription factors are known key regulators of the transition to flowering and flower development. However, their functions in root development are still poorly understood. Here we report that AGL21, an AGL17-clade MADS-box gene, plays a crucial role in lateral root development. AGL21 was highly expressed in root, particularly in the root central cylinder and lateral root primordia. AGL21 overexpression plants produced more and longer lateral roots while agl21 mutants showed impaired lateral root development, especially under nitrogen-deficient conditions. AGL21 was induced by many plant hormones and environmental stresses, suggesting a function of this gene in root system plasticity in response to various signals. Furthermore, AGL21 was found positively regulating auxin accumulation in lateral root primordia and lateral roots by enhancing local auxin biosynthesis, thus stimulating lateral root initiation and growth. We propose that AGL21 may be involved in various environmental and physiological signals-mediated lateral root development and growth.
Collapse
Affiliation(s)
- Lin-Hui Yu
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Zi-Qing Miao
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Guo-Feng Qi
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Jie Wu
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Xiao-Teng Cai
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Jie-Li Mao
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Cheng-Bin Xiang
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China.
| |
Collapse
|
20
|
Chung Y, Kwon SI, Choe S. Antagonistic regulation of Arabidopsis growth by brassinosteroids and abiotic stresses. Mol Cells 2014; 37:795-803. [PMID: 25377253 PMCID: PMC4255099 DOI: 10.14348/molcells.2014.0127] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/06/2014] [Accepted: 09/11/2014] [Indexed: 11/27/2022] Open
Abstract
To withstand ever-changing environmental stresses, plants are equipped with phytohormone-mediated stress resistance mechanisms. Salt stress triggers abscisic acid (ABA) signaling, which enhances stress tolerance at the expense of growth. ABA is thought to inhibit the action of growth-promoting hormones, including brassinosteroids (BRs). However, the regulatory mechanisms that coordinate ABA and BR activity remain to be discovered. We noticed that ABA-treated seedlings exhibited small, round leaves and short roots, a phenotype that is characteristic of the BR signaling mutant, brassinosteroid insensitive1-9 (bri1-9). To identify genes that are antagonistically regulated by ABA and BRs, we examined published Arabidopsis microarray data sets. Of the list of genes identified, those upregulated by ABA but downregulated by BRs were enriched with a BRRE motif in their promoter sequences. After validating the microarray data using quantitative RT-PCR, we focused on RD26, which is induced by salt stress. Histochemical analysis of transgenic Arabidopsis plants expressing RD26pro:GUS revealed that the induction of GUS expression after NaCl treatment was suppressed by co-treatment with BRs, but enhanced by co-treatment with propiconazole, a BR biosynthetic inhibitor. Similarly, treatment with bikinin, an inhibitor of BIN2 kinase, not only inhibited RD26 expression, but also reduced the survival rate of the plant following exposure to salt stress. Our results suggest that ABA and BRs act antagonistically on their target genes at or after the BIN2 step in BR signaling pathways, and suggest a mechanism by which plants fine-tune their growth, particularly when stress responses and growth compete for resources.
Collapse
Affiliation(s)
- Yuhee Chung
- School of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747,
Korea
| | - Soon Il Kwon
- Convergence Research Center for Functional Plant Products, Advanced Institutes of Convergence Technology, Suwon 443-270,
Korea
| | - Sunghwa Choe
- School of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747,
Korea
- Convergence Research Center for Functional Plant Products, Advanced Institutes of Convergence Technology, Suwon 443-270,
Korea
- Plant Genomics and Breeding Institute, Seoul National University, Seoul 151-921,
Korea
| |
Collapse
|
21
|
Kang G, Ma H, Liu G, Han Q, Li C, Guo T. Silencing of TaBTF3 gene impairs tolerance to freezing and drought stresses in wheat. Mol Genet Genomics 2013; 288:591-9. [PMID: 23942841 DOI: 10.1007/s00438-013-0773-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 08/03/2013] [Indexed: 12/11/2022]
Abstract
Basic transcription factor 3 (BTF3), the β-subunit of the nascent polypeptide-associated complex, is responsible for the transcriptional initiation of RNA polymerase II and is also involved in cell apoptosis, translation initiation regulation, growth, development, and other functions. Here, we report the impact of BTF3 on abiotic tolerance in higher plants. The transcription levels of the TaBTF3 gene, first isolated from wheat seedlings in our lab, were differentially regulated by diverse abiotic stresses and hormone treatments, including PEG-induced stress (20 % polyethylene glycol 6000), cold (4 °C), salt (100 mM NaCl), abscisic acid (100 μM), methyl jasmonate (50 μM), and salicylic acid (50 μM). Southern blot analysis indicated that, in the wheat genome, TaBTF3 is a multi-copy gene. Compared to BSMV-GFP-infected wheat plants (control), under freezing (-8 °C for 48 h) or drought stress (withholding water for 15 days) conditions, TaBTF3-silenced wheat plants showed lower survival rates, free proline content, and relative water content and higher relative electrical conductivity and water loss rate. These results suggest that silencing of the TaBTF3 gene may impair tolerance to freezing and drought stresses in wheat and that it may be involved in the response to abiotic stresses in higher plants.
Collapse
Affiliation(s)
- Guozhang Kang
- National Engineering Research Centre for Wheat, The Key Laboratory of Physiology, Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou, 450002, Henan, China,
| | | | | | | | | | | |
Collapse
|
22
|
Kang GZ, Peng HF, Han QX, Wang YH, Guo TC. Identification and expression pattern of ribosomal L5 gene in common wheat (Triticum aestivum L.). Gene 2012; 493:62-8. [DOI: 10.1016/j.gene.2011.11.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 10/12/2011] [Accepted: 11/14/2011] [Indexed: 11/25/2022]
|
23
|
You J, Zhang H, Liu N, Gao L, Kong L, Yang Z. Transcriptomic responses to aluminum stress in soybean roots. Genome 2011; 54:923-33. [PMID: 22040275 DOI: 10.1139/g11-060] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Aluminum (Al) toxicity is the primary limitation to crop production and plant growth in acid soils. Soybean has multiple mechanisms of Al resistance including the complexing and exclusion of Al in root apices by Al-induced citrate secretion. Microarray analysis is available for the identification of genes in soybean. In the present study, Affymetrix soybean genome array was used to identify the Al-induced differentially expressed genes in Al-resistant genotype Jiyu 70. With a cutoff of > 2.0-fold (p < 0.05) between non Al-treated and Al-treated root apices, 561 genes were upregulated and 78 genes were downregulated when roots were exposed to 30 μmol/L AlCl(3) for 4 h. Quantitative real-time PCR was used to test the microarray data. The analysis showed that nearly half of the Al-responsive genes were of unknown biological function. A higher proportion of genes related to transcription regulation and cell wall processes were observed in Al-induced up- and downregulated genes, respectively. Some genes homologous to the citrate transporter MATE family gene or C(2)H(2) family transcription factor gene, STOP1, were detected in our analysis. Some genes related to lignin deposition were upregulated, which might be related to Al-induced root elongation inhibition.
Collapse
Affiliation(s)
- Jiangfeng You
- Agriculture Ecology and Environment laboratory, College of Plant Science, Jilin University, Changchun 130062, PR China
| | | | | | | | | | | |
Collapse
|
24
|
Selvy PE, Lavieri RR, Lindsley CW, Brown HA. Phospholipase D: enzymology, functionality, and chemical modulation. Chem Rev 2011; 111:6064-119. [PMID: 21936578 PMCID: PMC3233269 DOI: 10.1021/cr200296t] [Citation(s) in RCA: 269] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Paige E Selvy
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37064, USA
| | | | | | | |
Collapse
|
25
|
Wang YH, Irving HR. Developing a model of plant hormone interactions. PLANT SIGNALING & BEHAVIOR 2011; 6:494-500. [PMID: 21406974 PMCID: PMC3142376 DOI: 10.4161/psb.6.4.14558] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 12/21/2010] [Indexed: 05/18/2023]
Abstract
Plant growth and development is influenced by mutual interactions among plant hormones. The five classical plant hormones are auxins, cytokinins, gibberellins, abscisic acid and ethylene. They are small diffusible molecules that easily penetrate between cells. In addition, newer classes of plant hormones have been identified such as brassinosteroids, jasmonic acid, salicylic acid and various small proteins or peptides. These hormones also play important roles in the regulation of plant growth and development. This review begins with a brief summary of the current findings on plant hormones. Based on this knowledge, a conceptual model about interactions among plant hormones is built so as to link and develop an understanding of the diverse functions of different plant hormones as a whole in plants.
Collapse
Affiliation(s)
- Yu Hua Wang
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Victoria, Australia
| | | |
Collapse
|
26
|
Fu Z, Jin X, Ding D, Li Y, Fu Z, Tang J. Proteomic analysis of heterosis during maize seed germination. Proteomics 2011; 11:1462-72. [DOI: 10.1002/pmic.201000481] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 12/21/2010] [Accepted: 01/18/2011] [Indexed: 12/29/2022]
|
27
|
Bodrato N, Franco L, Fresia C, Guida L, Usai C, Salis A, Moreschi I, Ferraris C, Verderio C, Basile G, Bruzzone S, Scarfì S, De Flora A, Zocchi E. Abscisic acid activates the murine microglial cell line N9 through the second messenger cyclic ADP-ribose. J Biol Chem 2009; 284:14777-87. [PMID: 19329433 PMCID: PMC2685659 DOI: 10.1074/jbc.m802604200] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 02/06/2009] [Indexed: 02/04/2023] Open
Abstract
Abscisic acid (ABA) is a phytohormone regulating important functions in higher plants, notably responses to abiotic stress. Recently, chemical or physical stimulation of human granulocytes was shown to induce production and release of endogenous ABA, which activates specific cell functions. Here we provide evidence that ABA stimulates several functional activities of the murine microglial cell line N9 (NO and tumor necrosis factor-alpha production, cell migration) through the second messenger cyclic ADP-ribose and an increase of intracellular calcium. ABA production and release occur in N9 cells stimulated with bacterial lipopolysaccharide, phorbol myristate acetate, the chemoattractant peptide f-MLP, or beta-amyloid, the primary plaque component in Alzheimer disease. Finally, ABA priming stimulates N9 cell migration toward beta-amyloid. These results indicate that ABA is a pro-inflammatory hormone inducing autocrine microglial activation, potentially representing a new target for anti-inflammatory therapies aimed at limiting microglia-induced tissue damage in the central nervous system.
Collapse
Affiliation(s)
- Nicoletta Bodrato
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Yang YT, Yu YL, Yang GD, Zhang JD, Zheng CC. Tissue-specific expression of the PNZIP promoter is mediated by combinatorial interaction of different cis-elements and a novel transcriptional factor. Nucleic Acids Res 2009; 37:2630-44. [PMID: 19270069 PMCID: PMC2677881 DOI: 10.1093/nar/gkp126] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 01/21/2009] [Accepted: 02/16/2009] [Indexed: 11/16/2022] Open
Abstract
Recent studies demonstrated that PNZIP and its homologs encode a special cyclase and play an important role in chlorophyll biosynthesis in higher plants. To investigate the molecular mechanism governing the PNZIP gene, the PNZIP promoter was isolated and analyzed. Deletion analysis indicated that G-box is an important element in the regulation of the reporter gene expression. Further mutation assay demonstrated that G-box and GATACT elements are necessary and sufficient for the high and tissue-specific expression of the GUS gene. Using yeast one-hybrid screening, we have isolated a novel tobacco bZIP protein, NtbZIP, which can specifically recognize the G-box of the PNZIP promoter. The NtbZIP protein shares a limited amino acid homology to Arabidopsis ABI5 and AtAREB1 and very low homology to other bZIP proteins. Northern blot analysis showed that the NtbZIP gene is not induced by exogenous ABA and is expressed in different tobacco organs. Cotransformation assays showed that the NtbZIP protein could activate the transcription of the GUS gene driven by the PNZIP promoter. Transgenic tobaccos analysis demonstrated that constitutively expressing antisense NtbZIP gene resulted in a lower NTZIP synthesis and reduced chlorophyll levels. We suggest that NTZIP is a target gene of NtbZIP, which is involved in the regulation of chlorophyll biosynthesis.
Collapse
Affiliation(s)
- Yu-Tao Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018 and Beijing Institute for neuroscience, Capital Medical University, Beijing 100069, P.R. China
| | - Yan-Li Yu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018 and Beijing Institute for neuroscience, Capital Medical University, Beijing 100069, P.R. China
| | - Guo-Dong Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018 and Beijing Institute for neuroscience, Capital Medical University, Beijing 100069, P.R. China
| | - Jie-Dao Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018 and Beijing Institute for neuroscience, Capital Medical University, Beijing 100069, P.R. China
| | - Cheng-Chao Zheng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018 and Beijing Institute for neuroscience, Capital Medical University, Beijing 100069, P.R. China
| |
Collapse
|
29
|
Bruzzone S, Bodrato N, Usai C, Guida L, Moreschi I, Nano R, Antonioli B, Fruscione F, Magnone M, Scarfì S, De Flora A, Zocchi E. Abscisic acid is an endogenous stimulator of insulin release from human pancreatic islets with cyclic ADP ribose as second messenger. J Biol Chem 2008; 283:32188-97. [PMID: 18784081 DOI: 10.1074/jbc.m802603200] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Abscisic acid (ABA) is a plant stress hormone recently identified as an endogenous pro-inflammatory cytokine in human granulocytes. Because paracrine signaling between pancreatic beta cells and inflammatory cells is increasingly recognized as a pathogenetic mechanism in the metabolic syndrome and type II diabetes, we investigated the effect of ABA on insulin secretion. Nanomolar ABA increases glucose-stimulated insulin secretion from RIN-m and INS-1 cells and from murine and human pancreatic islets. The signaling cascade triggered by ABA in insulin-releasing cells sequentially involves a pertussis toxin-sensitive G protein, cAMP overproduction, protein kinase A-mediated activation of the ADP-ribosyl cyclase CD38, and cyclic ADP-ribose overproduction. ABA is rapidly produced and released from human islets, RIN-m, and INS-1 cells stimulated with high glucose concentrations. In conclusion, ABA is an endogenous stimulator of insulin secretion in human and murine pancreatic beta cells. Autocrine release of ABA by glucose-stimulated pancreatic beta cells, and the paracrine production of the hormone by activated granulocytes and monocytes suggest that ABA may be involved in the physiology of insulin release as well as in its dysregulation under conditions of inflammation.
Collapse
Affiliation(s)
- Santina Bruzzone
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Lee MO, Cho K, Kim SH, Jeong SH, Kim JA, Jung YH, Shim J, Shibato J, Rakwal R, Tamogami S, Kubo A, Agrawal GK, Jwa NS. Novel rice OsSIPK is a multiple stress responsive MAPK family member showing rhythmic expression at mRNA level. PLANTA 2008; 4:448-50. [PMID: 18066586 DOI: 10.1007/s00425-007-0672-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 11/15/2007] [Indexed: 05/18/2023]
Abstract
We report isolation and transcriptional profiling of rice (Oryza sativa L.) mitogen-activated protein kinase (MAPK), OsSIPK (salicylic acid-induced protein kinase). OsSIPK gene is located on chromosome 6 most probably existing as a single copy in the rice genome, and encodes 398 amino acid polypeptide having the MAPK family signature and phosphorylation activation motif TEY. Steady state mRNA analyses of OsSIPK showed weak constitutive expression in leaves of 2-week-old rice seedlings. A time course (30-120 min) experiment using a variety of elicitors and stresses revealed that the OsSIPK mRNA is strongly induced by jasmonic acid (JA), salicylic acid (SA), ethephon, abscisic acid, cycloheximide (CHX), JA/SA + CHX, cantharidin, okadaic acid, hydrogen peroxide, chitosan, sodium chloride, and cold stress (12 degrees C), but not with wounding by cut, gaseous pollutants ozone, and sulfur dioxide, high temperature, ultraviolet C irradiation, sucrose, and drought. Its transcription was also found to be tissue-specifically regulated, and followed a rhythmic dark induction in leaves. Finally, we showed that the OsSIPK protein is localized to the nucleus. From these results, OsSIPK can be implicated in diverse stimuli-responsive signaling cascades and transcription of certain genes.
Collapse
Affiliation(s)
- Mi-Ok Lee
- Department of Molecular Biology, College of Natural Science, Sejong University, Gwangjin-Gu, Seoul, South Korea
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Chung S, Parish RW. Combinatorial interactions of multiple cis-elements regulating the induction of the Arabidopsis XERO2 dehydrin gene by abscisic acid and cold. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2008; 54:15-29. [PMID: 18088305 DOI: 10.1111/j.1365-313x.2007.03399.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Multiple combinations of mutations in the promoter of the XERO2 dehydrin gene were used to identify elements involved in ABA and cold induction. Mutating one of the three ACGT elements (ACGT1) increases expression in the absence of cold or ABA. An AT-rich element is a novel partner (coupling element) of ACGT-containing ABA-responsive cis-elements. A 12-bp palindrome also acts as a coupling element for ABA induction and includes one of the three dehydration-responsive element/C-repeat (DRE/CRT) elements and two overlapping motifs (TGTCG and TCGGC) previously shown to be statistically enriched in ABA-dependent and 'VP1 or ABA'-dependent activated genes (Plant Physiol. 2005; 139:437). At least two of the DRE/CRT elements are required for significant cold induction. During cold induction the AT-rich element also functions as a coupling element and ACGT1 is involved in repressing this induction. Two of the ACGT and DRE/CRT elements overlap, and mutating a single base in the ACGT of either of the two GCCGACGT sequences while retaining a DRE element reduced both ABA and cold induction. Changing the spatial relationships between the elements by deletion, inversion or insertion of DNA sequences reduced both cold and ABA induction. Overexpression of CBF1, -2 or -3 induced XERO2 expression in untreated plants. The ABI5 transcription factor may have a role in ABA-induced XERO2 expression, whereas ABI3 and ABI4 do not. The GCA2 gene was essential for both cold and ABA induction. A combination of the same overlapping and shared elements is used in the regulation of transcription by ABA and cold.
Collapse
Affiliation(s)
- Susanna Chung
- Department of Botany, La Trobe University, Bundoora, Vic. 3086, Australia
| | | |
Collapse
|
32
|
Schlögl PS, Nogueira FTS, Drummond R, Felix JM, De Rosa VE, Vicentini R, Leite A, Ulian EC, Menossi M. Identification of new ABA- and MEJA-activated sugarcane bZIP genes by data mining in the SUCEST database. PLANT CELL REPORTS 2008; 27:335-45. [PMID: 17968554 DOI: 10.1007/s00299-007-0468-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 10/10/2007] [Accepted: 10/11/2007] [Indexed: 05/10/2023]
Abstract
Sugarcane is generally propagated by cuttings of the stalk containing one or more lateral buds, which will develop into a new plant. The transition from the dormant into the active stage constitutes a complex phenomenon characterized by changes in accumulation of phytohormones and several other physiological aspects. Abscisic acid (ABA) and methyl-jasmonate (MeJA) are major signaling molecules, which influence plant development and stress responses. These plant regulators modulate gene expression with the participation of many transcriptional factors. Basic leucine zipper proteins (bZIPs) form a large family of transcriptional factors involved in a variety of plant physiological processes, such as development and responses to stress. Query sequences consisting of full-length protein sequence of each of the Arabidopsis bZIP families were utilized to screen the sugarcane EST database (SUCEST) and 86 sugarcane assembled sequences (SAS) coding for bZIPs were identified. cDNA arrays and RNA-gel blots were used to study the expression of these sugarcane bZIP genes during early plantlet development and in response to ABA and MeJA. Six bZIP genes were found to be differentially expressed during development. ABA and MeJA modulated the expression of eight sugarcane bZIP genes. Our findings provide novel insights into the expression of this large protein family of transcriptional factors in sugarcane.
Collapse
Affiliation(s)
- Paulo Sérgio Schlögl
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, CP 6109, 13083-875 Campinas, SP, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
33
|
James VA, Neibaur I, Altpeter F. Stress inducible expression of the DREB1A transcription factor from xeric, Hordeum spontaneum L. in turf and forage grass (Paspalum notatum Flugge) enhances abiotic stress tolerance. Transgenic Res 2007; 17:93-104. [PMID: 17415675 DOI: 10.1007/s11248-007-9086-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Accepted: 02/05/2007] [Indexed: 10/23/2022]
Abstract
The dehydration-responsive element binding proteins (DREB1)/C-repeat (CRT) binding factors (CBF) function as transcription activators and bind to the DRE/CRT cis-acting element commonly present in the promoters of abiotic stress-regulated genes. A DREB1A transcription factor ortholog was isolated from a xeric, wild barley (Hordeum spontaneum L.) accession, originating from the Negev desert. Sequence comparison revealed a very high degree of sequence conservation of HsDREB1A to the published barley (Hordeum vulgare L.) DREB1A. Constitutive expression of the HsDREB1A gene was able to trans-activate a reporter gene under transcriptional control of the stress-inducible HVA1s and Dhn8 promoters. HsDREB1A was subcloned under transcriptional control of the stress-inducible barley HVA1s promoter and introduced into the apomictic bahiagrass (Paspalum notatum Flugge) cultivar 'Argentine'. HsDREB1A integration and stress inducible expression was detected in primary transgenic bahiagrass plants and apomictic seed progeny by Southern blot, RT-PCR and northern blot analysis respectively. Transgenic bahiagrass plants with stress-inducible expression of HsDREB1A survived severe salt stress and repeated cycles of severe dehydration stress under controlled environment conditions, in contrast to non-transgenic plants. The observed abiotic stress tolerance is very desirable in turf and forage grasses like bahiagrass, where seasonal droughts and irrigation restrictions affect establishment, persistence or productivity of this perennial crop.
Collapse
Affiliation(s)
- Victoria A James
- Agronomy Department, Plant Molecular and Cellular Biology Program, Genetics Institute, University of Florida, PO Box 110300, Gainesville, FL 32611, USA
| | | | | |
Collapse
|
34
|
Chae MJ, Lee JS, Nam MH, Cho K, Hong JY, Yi SA, Suh SC, Yoon IS. A rice dehydration-inducible SNF1-related protein kinase 2 phosphorylates an abscisic acid responsive element-binding factor and associates with ABA signaling. PLANT MOLECULAR BIOLOGY 2007; 63:151-69. [PMID: 16977424 DOI: 10.1007/s11103-006-9079-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2005] [Accepted: 08/19/2006] [Indexed: 05/11/2023]
Abstract
By a differential cDNA screening technique, we have isolated a dehydration-inducible gene (designated OSRK1) that encodes a 41.8 kD protein kinase of SnRK2 family from Oryza sativa. The OSRK1 transcript level was undetectable in vegetative tissues, but significantly increased by hyperosmotic stress and Abscisic acid (ABA). To determine its biochemical properties, we expressed and isolated OSRK1 and its mutants as glutathione S-transferase fusion proteins in Escherichia coli. In vitro kinase assay showed that OSRK1 can phosphorylate itself and generic substrates as well. Interestingly, OSRK1 showed strong substrate preference for rice bZIP transcription factors and uncommon cofactor requirement for Mn(2+) over Mg(2+). By deletion of C-terminus 73 amino acids or mutations of Ser-158 and Thr-159 to aspartic acids (Asp) in the activation loop, the activity of OSRK1 was dramatically decreased. OSRK1 can transphosphorylate the inactive deletion protein. A rice family of abscisic acid-responsive element (ABRE) binding factor, OREB1 was phosphorylated in vitro by OSRK1 at multiple sites of different functional domains. MALDI-TOF analysis identified a phosphorylation site at Ser44 of OREB1 and mutation of the residue greatly decreased the substrate specificity for OSRK1. The recognition motif for OSRK1, RQSS is highly similar to the consensus substrate sequence of AMPK/SNF1 kinase family. We further showed that OSRK1 interacts with OREB1 in a yeast two-hybrid system and co-localized to nuclei by transient expression analysis of GFP-fused protein in onion epidermis. Finally, ectopic expression of OSRK1 in transgenic tobacco resulted in a reduced sensitivity to ABA in seed germination and root elongation. These findings suggest that OSRK1 is associated with ABA signaling, possibly through the phosphorylation of ABF family in vivo. The interaction between SnRK2 family kinases and ABF transcription factors may constitute an important part of cross-talk mechanism in the stress signaling networks in plants.
Collapse
Affiliation(s)
- Min-Ju Chae
- Cell and Genetics Division, National Institute of Agricultural Biotechnology, Suwon, 441-707, Republic of Korea
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Roos W, Viehweger K, Dordschbal B, Schumann B, Evers S, Steighardt J, Schwartze W. Intracellular pH signals in the induction of secondary pathways--the case of Eschscholzia californica. JOURNAL OF PLANT PHYSIOLOGY 2006; 163:369-81. [PMID: 16413947 DOI: 10.1016/j.jplph.2005.11.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 11/23/2005] [Accepted: 11/24/2005] [Indexed: 05/06/2023]
Abstract
Transient peaks of the cytoplasmic pH are essential elements in a number of signal cascades that activate environmental responses or developmental processes in plant cells but little is known about the mechanisms of their generation. In many plant cells, elicitation of the hypersensitive response is preceded by a perturbation of the ionic balance at the plasma membrane including the inhibition of the proton pump and the influx of H+ from the apoplast. A basically different mechanism of cytoplasmic acidification that is fed by vacuolar protons has been discovered in cell suspensions of the California Poppy (Eschscholzia californica). These cells react to a yeast glycoprotein elicitor with the overproduction of benzophenanthridine alkaloids. Low elicitor concentrations trigger the biosynthesis of these phytoalexins without invoking elements of the hypersensitive response. Accumulated data support the existence of a signal path that includes the following steps: Links between the above events that connect them within a distinct signal path are substantiated by the phenotypes of transformed cell lines that either display lowered Galpha levels due to antisense transformation or express Galpha-binding antibodies in the cytoplasm. All of these cell lines lack the elicitor-activation of PLA2 and of vacuolar proton fluxes and show an impaired phytoalexin response to low elicitor concentrations. High elicitor concentrations trigger alkaloid biosynthesis via an increase of jasmonate at a pH-independent signal path.
Collapse
Affiliation(s)
- Werner Roos
- Institute of Pharmaceutical Biology and Pharmacology, Department of Molecular Cell Biology, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany.
| | | | | | | | | | | | | |
Collapse
|
36
|
Peng YB, Zou C, Wang DH, Gong HQ, Xu ZH, Bai SN. Preferential localization of abscisic acid in primordial and nursing cells of reproductive organs of Arabidopsis and cucumber. THE NEW PHYTOLOGIST 2006; 170:459-66. [PMID: 16626468 DOI: 10.1111/j.1469-8137.2006.01683.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Abscisic acid (ABA) is known to function in plant stress responses and seed dormancy, and much is known about its detailed mechanisms of signal transduction. Recent studies suggest that this hormone may also play important roles in sugar signaling and assimilate distribution during fruit development. However, little is known about the role of ABA in actively growing or differentiating fruits and other plant organs or tissues. To explore whether ABA functions during the early development of reproductive organs, we carried out ABA immunolocalization using monoclonal antibodies. The specific ABA accumulation pattern was verified by gas chromatography-mass spectrometry (GC-MS). ABA was not only detected in primordial cells of flower organs, but was also detected in nursing cells (e.g. tapetum and integuments), which function in supplying nutrition for germ cell development. These findings suggest that, in addition to its well-known function as a 'negative hormone', ABA may play some 'positive' roles during plant development, including possible involvement in the regulation of assimilate distribution.
Collapse
Affiliation(s)
- Yi-Ben Peng
- National Key Laboratory of Protein Engineering and Plant Gene Engineering, College of Life Sciences, Peking University, National Plant Gene Research Center (Beijing), Beijing 100871, China
| | | | | | | | | | | |
Collapse
|
37
|
Takahashi S, Seki M, Ishida J, Satou M, Sakurai T, Narusaka M, Kamiya A, Nakajima M, Enju A, Akiyama K, Yamaguchi-Shinozaki K, Shinozaki K. Monitoring the expression profiles of genes induced by hyperosmotic, high salinity, and oxidative stress and abscisic acid treatment in Arabidopsis cell culture using a full-length cDNA microarray. PLANT MOLECULAR BIOLOGY 2004; 56:29-55. [PMID: 15604727 DOI: 10.1007/s11103-004-2200-0] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Transcriptional regulation in response to hyperosmotic, high-salinity and oxidative stress, and abscisic acid (ABA) treatment in Arabidopsis suspension-cultured cell line T87 was investigated with a cDNA microarray containing 7000 independent full-length Arabidopsis cDNAs. The transcripts of 102, 11, 84 and 73 genes were increased more than 5-fold within 5h after treatment with 0.5M mannitol, 0.1M NaCl, 50 microM ABA and 10mM H2O2, respectively. On the other hand, the transcripts of 44, 57, 25 and 34 genes were down-regulated to less than one-third within 5h after treatment with 0.5M mannitol, 0.1M NaCl, 50 microM ABA and 10mM H2O2, respectively. Venn diagram analysis revealed 11 genes were induced significantly by mannitol, NaCl, and ABA, indicating crosstalk among these signaling pathways. Comparison of the genes induced by each stress revealed that 32%, 17% and 33% of mannitol-, NaCl- and ABA-inducible genes were also induced by H2O2, indicating the crosstalk between the signaling pathways for osmotic stress and oxidative stress. Although the expression profiles revealed that the T87 cells had most of the regulatory systems seen in Arabidopsis seedlings, the T87 cells did not have one of ABA-dependent signaling pathways.
Collapse
MESH Headings
- Abscisic Acid/pharmacology
- Arabidopsis/cytology
- Arabidopsis/drug effects
- Arabidopsis/genetics
- Blotting, Northern
- Cells, Cultured
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Complementary/isolation & purification
- Gene Expression Profiling
- Gene Expression Regulation, Developmental/drug effects
- Gene Expression Regulation, Plant/drug effects
- Hydrogen Peroxide/pharmacology
- Hypertonic Solutions
- Mannitol/pharmacology
- Oligonucleotide Array Sequence Analysis/methods
- Osmotic Pressure
- Oxidative Stress
- Promoter Regions, Genetic/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Seedlings/drug effects
- Seedlings/genetics
- Sequence Analysis, DNA
- Sodium Chloride/pharmacology
- Time Factors
- Transcription, Genetic/drug effects
Collapse
Affiliation(s)
- Seiji Takahashi
- Laboratory of Plant Molecular Biology, RIKEN Tsukuba Institute, 3-1-1 Koyadai, Tsukuba , 305-0074, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Sherameti I, Shahollari B, Landsberger M, Westermann M, Cherepneva G, Kusnetsov V, Oelmüller R. Cytokinin stimulates polyribosome loading of nuclear-encoded mRNAs for the plastid ATP synthase in etioplasts of Lupinus luteus: the complex accumulates in the inner-envelope membrane with the CF(1) moiety located towards the stromal space. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2004; 38:578-93. [PMID: 15125765 DOI: 10.1111/j.1365-313x.2004.02069.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three of the nine subunits of the plastid ATP synthase, including the subunit of the CF(1) moiety (gene AtpC), are encoded in the nucleus. Application of cytokinin to etiolated lupine seedlings induces polyribosome association of their mRNAs. This appears to be specific as no such regulation was observed for messages for three ribosomal proteins. Cytokinin-mediated polyribosome loading was also observed for the spinach AtpC message in etiolated transgenic tobacco seedlings. Analysis of various spinach AtpC mRNA derivatives uncovered that the 5' untranslated region (5' UTR) of this message is sufficient to direct polyribosome loading, and that sequences at the 3' end of the AtpC 5' UTR, including an UC-rich motif, are crucial for this regulation. The increase in polyribosome loading of the AtpC message correlated with an increased synthesis of the polypeptide. The subunit, together with the ATP synthase complex, accumulates in the inner-envelope membrane with the CF(1) moiety located towards the stromal space of the etioplast. These results suggest that cytokinin promotes accumulation of the ATP synthase in the inner-envelope membrane of lupine etioplasts by stimulating the translation efficiency of their nuclear-encoded messages.
Collapse
Affiliation(s)
- Irena Sherameti
- Institut für Allgemeine Botanik und Pflanzenphysiologie, Friedrich-Schiller-Universität Jena, Dornburger Str. 159, D-07743 Jena, Germany
| | | | | | | | | | | | | |
Collapse
|
39
|
Brault M, Amiar Z, Pennarun AM, Monestiez M, Zhang Z, Cornel D, Dellis O, Knight H, Bouteau F, Rona JP. Plasma membrane depolarization induced by abscisic acid in Arabidopsis suspension cells involves reduction of proton pumping in addition to anion channel activation, which are both Ca2+ dependent. PLANT PHYSIOLOGY 2004; 135:231-43. [PMID: 15141069 PMCID: PMC429360 DOI: 10.1104/pp.104.039255] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2004] [Revised: 02/06/2004] [Accepted: 03/04/2004] [Indexed: 05/09/2023]
Abstract
In Arabidopsis suspension cells a rapid plasma membrane depolarization is triggered by abscisic acid (ABA). Activation of anion channels was shown to be a component leading to this ABA-induced plasma membrane depolarization. Using experiments employing combined voltage clamping, continuous measurement of extracellular pH, we examined whether plasma membrane H(+)-ATPases could also be involved in the depolarization. We found that ABA causes simultaneously cell depolarization and medium alkalinization, the second effect being abolished when ABA is added in the presence of H+ pump inhibitors. Inhibition of the proton pump by ABA is thus a second component leading to the plasma membrane depolarization. The ABA-induced depolarization is therefore the result of two different processes: activation of anion channels and inhibition of H(+)-ATPases. These two processes are independent because impairing one did not suppress the depolarization. Both processes are however dependent on the [Ca2+]cyt increase induced by ABA since increase in [Ca(2+)](cyt) enhanced anion channels and impaired H(+)-ATPases.
Collapse
Affiliation(s)
- Mathias Brault
- Laboratoire d'Electrophysiologie des Membranes, EA 3514, Université Paris 7, 75251 Paris 05, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Becker D, Hoth S, Ache P, Wenkel S, Roelfsema MRG, Meyerhoff O, Hartung W, Hedrich R. Regulation of the ABA-sensitive Arabidopsis potassium channel gene GORK in response to water stress. FEBS Lett 2003; 554:119-26. [PMID: 14596925 DOI: 10.1016/s0014-5793(03)01118-9] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The phytohormone abscisic acid (ABA) regulates many stress-related processes in plants. In this context ABA mediates the responsiveness of plants to environmental stresses such as drought, cold or salt. In response to water stress, ABA induces stomatal closure by activating Ca2+, K+ and anion channels in guard cells. To understand the signalling pathways that regulate these turgor control elements, we studied the transcriptional control of the K+ release channel gene GORK that is expressed in guard cells, roots and vascular tissue. GORK transcription was up-regulated upon onset of drought, salt stress and cold. The wilting hormone ABA that integrates responses to these stimuli induced GORK expression in seedlings in a time- and concentration-dependent manner and this induction was dependent on extracellular Ca2+. ABA-responsive expression of GORK was impaired in the ABA-insensitive mutants abi1-1 and abi2-1, indicating that these protein phosphatases are regulators of GORK expression. Application of ABA to suspension-cultured cells for 2 min followed by a 4 h chase was sufficient to manifest transcriptional activation of the K+ channel gene. As predicted for a process involved in drought adaptation, only 12-24 h after the release of the stress hormone, GORK mRNA slowly decreased. In contrast to other tissues, GORK expression as well as K+(out) channel activity in guard cells is ABA insensitive, allowing the plant to adjust stomatal movement and water status control separately.
Collapse
Affiliation(s)
- D Becker
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Deeken R, Ivashikina N, Czirjak T, Philippar K, Becker D, Ache P, Hedrich R. Tumour development in Arabidopsis thaliana involves the Shaker-like K+ channels AKT1 and AKT2/3. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2003; 34:778-787. [PMID: 12795698 DOI: 10.1046/j.1365-313x.2003.01766.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
After completion of the Arabidopsis genome-sequencing programme, crown galls induced by Agrobacterium tumefaciens may become a model system to study plant tumour development. The molecular mechanisms of nutrient supply to support tumour growth and development are still unknown. In this study, we have identified a unique profile of Shaker-like potassium channels in agrobacteria-induced Arabidopsis tumours. Comparing the gene expression pattern of rapidly growing tumours with that of non-infected tissues, we found the suppression of shoot in favour of root-specific K+ channels. Among these, the upregulation of AKT1 and AtKC1 and the suppression of AKT2/3 and GORK were most pronounced. As a consequence, K+ uptake and accumulation were elevated in the tumour (163 mm) compared to control tissues (92 mm). Patch clamp studies on tumour protoplasts identified a population expressing the electrical properties of the AKT1 K+ channel. Furthermore, plants lacking a functional AKT1 or the AKT2/3 phloem K+ channel gene did not support tumour growth. This indicates that the delivery of potassium by AKT1 and the direction of assimilates, triggered by AKT2/3, are essential for tumour growth.
Collapse
Affiliation(s)
- Rosalia Deeken
- Julius-von-Sachs-Institut für Molekulare Pflanzenphysiologie und Biophysik, Universität Würzburg, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | | | | | | | | | | | | |
Collapse
|
42
|
Wu Y, Sanchez JP, Lopez-Molina L, Himmelbach A, Grill E, Chua NH. The abi1-1 mutation blocks ABA signaling downstream of cADPR action. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2003; 34:307-15. [PMID: 12713537 DOI: 10.1046/j.1365-313x.2003.01721.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Arabidopsis thaliana abscisic acid insensitive 1-1 (abi1-1) is a dominant mutant that is insensitive to the inhibition of germination and growth by the plant hormone, abscisic acid (ABA). The mutation severely decreases the catalytic activity of the ABI1 type 2C protein phosphatase (PP2C). However, the site of action of the abi1-1/ABI1 in the ABA signal transduction pathway has not yet been determined. Using single cell assays, we showed that microinjecting mutant abi1-1 protein inhibited the activation of RD29A-GUS and KIN2-GUS in response to ABA, cyclic ADP-ribose (cADPR), and Ca2+. The inhibitory effect of the mutant protein, however, was reversed by co-microinjection of an excess amount of the ABI1 protein. In transgenic Arabidopsis plants, overexpression of abi1-1 rendered the plants insensitive to ABA during germination, whereas overexpression of ABI1 did not have any apparent effect. Moreover, transgenic plants overexpressing abi1-1 were blocked in the induction of ABA-responsive genes; however, overexpression of ABI1 did not affect gene expression. Taken together, our results demonstrate that abi1-1 is likely to be a dominant negative mutation and ABI1 likely acts downstream of cADPR in the ABA-signaling pathway. Our results on ABI1 overexpression in Arabidopsis are not compatible with a negative regulatory role of this phosphatase in ABA responses.
Collapse
Affiliation(s)
- Yan Wu
- Laboratory of Plant Molecular Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA
| | | | | | | | | | | |
Collapse
|
43
|
Narusaka Y, Nakashima K, Shinwari ZK, Sakuma Y, Furihata T, Abe H, Narusaka M, Shinozaki K, Yamaguchi-Shinozaki K. Interaction between two cis-acting elements, ABRE and DRE, in ABA-dependent expression of Arabidopsis rd29A gene in response to dehydration and high-salinity stresses. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2003; 34:137-48. [PMID: 12694590 DOI: 10.1046/j.1365-313x.2003.01708.x] [Citation(s) in RCA: 437] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Many abiotic stress-inducible genes contain two cis-acting elements, namely a dehydration-responsive element (DRE; TACCGACAT) and an ABA-responsive element (ABRE; ACGTGG/TC), in their promoter regions. We precisely analyzed the 120 bp promoter region (-174 to -55) of the Arabidopsis rd29A gene whose expression is induced by dehydration, high-salinity, low-temperature, and abscisic acid (ABA) treatments and whose 120 bp promoter region contains the DRE, DRE/CRT-core motif (A/GCCGAC), and ABRE sequences. Deletion and base substitution analyses of this region showed that the DRE-core motif functions as DRE and that the DRE/DRE-core motif could be a coupling element of ABRE. Gel mobility shift assays revealed that DRE-binding proteins (DREB1s/CBFs and DREB2s) bind to both DRE and the DRE-core motif and that ABRE-binding proteins (AREBs/ABFs) bind to ABRE in the 120 bp promoter region. In addition, transactivation experiments using Arabidopsis leaf protoplasts showed that DREBs and AREBs cumulatively transactivate the expression of a GUS reporter gene fused to the 120 bp promoter region of rd29A. These results indicate that DRE and ABRE are interdependent in the ABA-responsive expression of the rd29A gene in response to ABA in Arabidopsis.
Collapse
Affiliation(s)
- Yoshihiro Narusaka
- Biological Resources Division, Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Lin F, Xu SL, Ni WM, Chu ZQ, Xu ZH, Xue HW. Identification of ABA-responsive genes in rice shoots via cDNA macroar-. Cell Res 2003; 13:59-68. [PMID: 12643350 DOI: 10.1038/sj.cr.7290151] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Phytohormone abscisic acid (ABA) was critical for many plant growth and developmental processes including seed maturation, germination and response to environmental factors. With the purpose to detect the possible ABA related signal transduction pathways, we tried to isolate ABA-regulated genes through cDNA macroarray technology using ABA-treated rice seedling as materials (under treatment for 2, 4, 8 and 12 h). Of 6144 cDNA clones tested, 37 differential clones showing induction or suppression for at least one time, were isolated. Of them 30 and 7 were up- or down-regulated respectively. Sequence analyses revealed that the putative encoded proteins were involved in different possible processes, including transcription, metabolism and resistance, photosynthesis, signal transduction, and seed maturation. 6 cDNA clones were found to encode proteins with unknown functions. Regulation by ABA of 7 selected clones relating to signal transduction or metabolism was confirmed by reverse transcription PCR. In addition, some clones were further shown to be regulated by other plant growth regulators including auxin and brassinosteroid, which, however, indicated the complicated interactions of plant hormones. Possible signal transduction pathways involved in ABA were discussed.
Collapse
Affiliation(s)
- Fang Lin
- National Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Science (SIBS), Chinese Academy of Sciences, 300 Fenglin Road, 200032 Shanghai, China
| | | | | | | | | | | |
Collapse
|
45
|
Kim JA, Agrawal GK, Rakwal R, Han KS, Kim KN, Yun CH, Heu S, Park SY, Lee YH, Jwa NS. Molecular cloning and mRNA expression analysis of a novel rice (Oryzasativa L.) MAPK kinase kinase, OsEDR1, an ortholog of Arabidopsis AtEDR1, reveal its role in defense/stress signalling pathways and development. Biochem Biophys Res Commun 2003; 300:868-76. [PMID: 12559953 DOI: 10.1016/s0006-291x(02)02944-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Mitogen-activated protein kinase (MAPK) cascade(s) is important for plant defense/stress responses. Though MAPKs have been identified and characterized in rice (Oryza sativa L.), a monocot cereal crop research model, the first upstream component of the kinase cascade, namely MAPK kinase kinase (MAPKKK) has not yet been identified. Here we report the cloning of a novel rice gene encoding a MAPKKK, OsEDR1, designated based on its homology with the Arabidopsis MAPKKK, AtEDR1. OsEDR1, a single copy gene in the genome of rice, encodes a predicted protein with molecular mass of 113046.13 and a pI of 9.03. Using our established two-week-old rice seedling in vitro model system, we show that OsEDR1 has a constitutive expression in seedling leaves and is further up-regulated within 15 min upon wounding by cut, treatment with the global signals jasmonic acid (JA), salicylic acid (SA), ethylene (ethephon, ET), abscisic acid, and hydrogen peroxide. In addition, protein phosphatase inhibitors, fungal elicitor chitosan, drought, high salt and sugar, and heavy metals also dramatically induce its expression. Moreover, OsEDR1 expression was altered by co-application of JA, SA, and ET, and required de novo synthesized protein factor(s) in its transient regulation. Furthermore, using an in vivo system we also show that OsEDR1 responds to changes in temperature and environmental pollutants-ozone and sulfur dioxide. Finally, OsEDR1 expression varied significantly in vegetative and reproductive tissues. These results suggest a role for OsEDR1 in defense/stress signalling pathways and development.
Collapse
Affiliation(s)
- Jung-A Kim
- Department of Molecular Biology, College of Natural Science, Sejong University, Seoul 143-747, Republic of Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Agrawal GK, Agrawal SK, Shibato J, Iwahashi H, Rakwal R. Novel rice MAP kinases OsMSRMK3 and OsWJUMK1 involved in encountering diverse environmental stresses and developmental regulation. Biochem Biophys Res Commun 2003; 300:775-83. [PMID: 12507518 DOI: 10.1016/s0006-291x(02)02868-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We report isolation of two novel rice (Oryza sativa L.) mitogen-activated protein kinases (MAPKs), OsMSRMK3 (multiple stress responsive) and OsWJUMK1 (wound- and JA-uninducible) that most likely exist as single copy genes in its genome. OsMSRMK3 and OsWJUMK1 encode 369 and 569 amino acid polypeptides having the MAPK family signature and phosphorylation activation motifs TEY and TDY, respectively. Steady state mRNA analyses of these MAPKs with constitutive expression in leaves of two-week-old seedlings revealed that OsMSRMK3 was up-regulated upon wounding (by cut), jasmonic acid (JA), salicylic acid (SA), ethylene, abscisic acid, hydrogen peroxide (H(2)O(2)), protein phosphatase inhibitors, chitosan, high salt/sugar, and heavy metals, whereas OsWJUMK1 not induced by either wounding, JA or SA, showed up-regulation only by H(2)O(2), heavy metals, and cold stress (12 degrees C). Moreover, these MAPKs were developmentally regulated. These results strongly suggest a role for OsMSRMK3 and OsWJUMK1 in both stress-signalling pathways and development in rice.
Collapse
Affiliation(s)
- Ganesh K Agrawal
- Research Laboratory for Agricultural Biotechnology and Biochemistry (RLABB), GPO Box 8207, Kathmandu, Nepal
| | | | | | | | | |
Collapse
|
47
|
Simpson SD, Nakashima K, Narusaka Y, Seki M, Shinozaki K, Yamaguchi-Shinozaki K. Two different novel cis-acting elements of erd1, a clpA homologous Arabidopsis gene function in induction by dehydration stress and dark-induced senescence. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2003; 33:259-70. [PMID: 12535340 DOI: 10.1046/j.1365-313x.2003.01624.x] [Citation(s) in RCA: 262] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Many plant genes have been shown to be induced by water stress and function in stress tolerance. The erd1 gene has been shown to be upregulated in response to both water stress and etiolation. Promoter studies using the erd1 promoter region fused to the luciferase (LUC) reporter gene in Arabidopsis thaliana were performed to identify the putative cis elements involved. Results indicated that the cis elements, responsible for gene expression during dehydration and etiolation, are separately located in two discrete portions of the erd1 promoter. Base substitution analysis showed that a 14-bp region from -599 to -586, and a myc recognition motif from -466 to -461 are necessary for the induction of LUC activity in dehydrated plants. On the other hand, base substitution analysis revealed that both an abscisic acid responsive element (ABRE)-like sequence (from -199 to -195) and an ACGT sequence (from -155 to -152) are required for an etiolation-induced increase in LUC activity. LUC activity measurements from etiolated transgenic plants incubated in either water, N6-benzyleadenine (BA), or a 1% sucrose solution found that while BA was able to delay the increase in LUC activity seen in water-treated plants, no increase in LUC activity was seen in plants incubated in sucrose. These results indicate that the erd1 promoter contains two different regulatory systems that are involved in upregulation by dehydration stress and dark-induced senescence.
Collapse
Affiliation(s)
- Sean D Simpson
- Biological Resources Division, Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan
| | | | | | | | | | | |
Collapse
|
48
|
Fedoroff NV. Cross-talk in abscisic acid signaling. SCIENCE'S STKE : SIGNAL TRANSDUCTION KNOWLEDGE ENVIRONMENT 2002; 2002:re10. [PMID: 12107340 DOI: 10.1126/stke.2002.140.re10] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
"Cross-talk" in hormone signaling reflects an organism's ability to integrate different inputs and respond appropriately, a crucial function at the heart of signaling network operation. Abscisic acid (ABA) is a plant hormone involved in bud and seed dormancy, growth regulation, leaf senescence and abscission, stomatal opening, and a variety of plant stress responses. This review summarizes what is known about ABA signaling in the control of stomatal opening and seed dormancy and provides an overview of emerging knowledge about connections between ABA, ethylene, sugar, and auxin synthesis and signaling.
Collapse
Affiliation(s)
- Nina V Fedoroff
- Biotechnology Institute, Life Sciences Consortium, and Biology Department, Pennsylvania State University, University Park, PA 16802, USA.
| |
Collapse
|
49
|
|
50
|
Ritchie SM, Swanson SJ, Gilroy S. From common signalling components to cell specific responses: insights from the cereal aleurone. PHYSIOLOGIA PLANTARUM 2002; 115:342-351. [PMID: 12081526 DOI: 10.1034/j.1399-3054.2002.1150303.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Studies into the molecules underlying plant signal transduction events continue to reveal the involvement of highly conserved factors such as Ca2+, calmodulin, cyclic GMP and phospholipases in a remarkably diverse array of physiological processes. The hormonal response systems in the aleurone cells of the cereal grain and in the stomatal guard cell are beginning to reveal how diversity of response can be hard wired into these cells despite the use of these common signalling intermediates. In both the aleurone and the guard cell ABA signalling operates through the action of phospholipase D and alterations in a Ca2+-dependent signalling system. The role of phospholipase D is highly analogous in these two divergent cell types, perhaps reflecting the closeness of this enzyme to a conserved ABA receptor. However, specificity in response becomes evident in elements downstream from PLD, such as in the Ca2+ signalling system. For example, ABA has opposite effects on cytoplasmic Ca2+ in the aleurone and guard cell. Combining the Ca2+-dependent signalling activities in networks with parallel regulatory activities such as cyclic GMP appears to underlie the flexible regulatory systems that are the hallmark of plant cell function.
Collapse
Affiliation(s)
- Sian M Ritchie
- Biology Department, The Pennsylvania State University, 208 Mueller Laboratory, University Park, PA 16802, USA
| | | | | |
Collapse
|