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Hong MJ, Ko CS, Kim JB, Kim DY. Identification and transcriptomic profiling of salinity stress response genes in colored wheat mutant. PeerJ 2024; 12:e17043. [PMID: 38464747 PMCID: PMC10924784 DOI: 10.7717/peerj.17043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 02/13/2024] [Indexed: 03/12/2024] Open
Abstract
Background Salinity is a major abiotic stress that prevents normal plant growth and development, ultimately reducing crop productivity. This study investigated the effects of salinity stress on two wheat lines: PL1 (wild type) and PL6 (mutant line generated through gamma irradiation of PL1). Results The salinity treatment was carried out with a solution consisting of a total volume of 200 mL containing 150 mM NaCl. Salinity stress negatively impacted germination and plant growth in both lines, but PL6 exhibited higher tolerance. PL6 showed lower Na+ accumulation and higher K+ levels, indicating better ion homeostasis. Genome-wide transcriptomic analysis revealed distinct gene expression patterns between PL1 and PL6 under salt stress, resulting in notable phenotypic differences. Gene ontology analysis revealed positive correlations between salt stress and defense response, glutathione metabolism, peroxidase activity, and reactive oxygen species metabolic processes, highlighting the importance of antioxidant activities in salt tolerance. Additionally, hormone-related genes, transcription factors, and protein kinases showed differential expression, suggesting their roles in the differential salt stress response. Enrichment of pathways related to flavonoid biosynthesis and secondary metabolite biosynthesis in PL6 may contribute to its enhanced antioxidant activities. Furthermore, differentially expressed genes associated with the circadian clock system, cytoskeleton organization, and cell wall organization shed light on the plant's response to salt stress. Conclusions Understanding these mechanisms is crucial for developing stress-tolerant crop varieties, improving agricultural practices, and breeding salt-resistant crops to enhance global food production and address food security challenges.
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Affiliation(s)
- Min Jeong Hong
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeollabuk-do, Korea
| | - Chan Seop Ko
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeollabuk-do, Korea
| | - Jin-Baek Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeollabuk-do, Korea
| | - Dae Yeon Kim
- Plant Resources, Kongju National University, Yesan-eup, Chungnam, South Korea
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Irulappan V, Park HW, Han SY, Kim MH, Kim JS. Genome-wide identification of a novel Na + transporter from Bienertia sinuspersici and overexpression of BsHKT1;2 improved salt tolerance in Brassica rapa. Front Plant Sci 2023; 14:1302315. [PMID: 38192689 PMCID: PMC10773568 DOI: 10.3389/fpls.2023.1302315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 11/24/2023] [Indexed: 01/10/2024]
Abstract
Salt stress is an ever-increasing stressor that affects both plants and humans. Therefore, developing strategies to limit the undesirable effects of salt stress is essential. Sodium ion exclusion is well known for its efficient salt-tolerance mechanism. The High-affinity K+ Transporter (HKT) excludes excess Na+ from the transpiration stream. This study identified and characterized the HKT protein family in Bienertia sinuspersici, a single-cell C4 plant. The HKT and Salt Overly Sensitive 1 (SOS1) expression levels were examined in B. sinuspersici and Arabidopsis thaliana leaves under four different salt stress conditions: 0, 100, 200, and 300 mM NaCl. Furthermore, BsHKT1;2 was cloned, thereby producing stable transgenic Brassica rapa. Our results showed that, compared to A. thaliana as a glycophyte, the HKT family is expanded in B. sinuspersici as a halophyte with three paralogs. The phylogenetic analysis revealed three paralogs belonging to the HKT subfamily I. Out of three copies, the expression of BsHKT1;2 was higher in Bienertia under control and salt stress conditions than in A. thaliana. Stable transgenic plants overexpressing 35S::BsHKT1;2 showed higher salt tolerance than non-transgenic plants. Higher biomass and longer roots were observed in the transgenic plants under salt stress than in non-transgenic plants. This study demonstrates the evolutionary and functional differences in HKT proteins between glycophytes and halophytes and associates the role of BsHKT1;2 in imparting salt tolerance and productivity.
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Affiliation(s)
| | | | | | | | - Jung Sun Kim
- Genomics Division, Department of Agricultural Bio-Resources, National Institute of Agricultural Sciences, Jeonju, Republic of Korea
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Yang X, Hu R, Sun F, Shen S, Zhang M, Liu Y, Zhang Y, Du H, Lu K, Qu C, Yin N. Identification of the High-Affinity Potassium Transporter Gene Family (HKT) in Brassica U-Triangle Species and Its Potential Roles in Abiotic Stress in Brassica napus L. Plants (Basel) 2023; 12:3768. [PMID: 37960124 PMCID: PMC10649870 DOI: 10.3390/plants12213768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/23/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023]
Abstract
Members of the high-affinity potassium transporter (HKT) protein family regulate the uptake and homeostasis of sodium and potassium ions, but little research describes their roles in response to abiotic stresses in rapeseed (Brassica napus L.). In this study, we identified and characterized a total of 36 HKT genes from the species comprising the triangle of U model (U-triangle species): B. rapa, B. nigra, B. oleracea, B. juncea, B. napus, and B. carinata. We analyzed the phylogenetic relationships, gene structures, motif compositions, and chromosomal distributions of the HKT family members of rapeseed. Based on their phylogenetic relationships and assemblage of functional domains, we classified the HKT members into four subgroups, HKT1;1 to HKT1;4. Analysis of the nonsynonymous substitutions (Ka), synonymous substitutions (Ks), and the Ka/Ks ratios of HKT gene pairs suggested that these genes have experienced strong purifying selective pressure after duplication, with their evolutionary relationships supporting the U-triangle theory. Furthermore, the expression profiles of BnaHKT genes varies among potassium, phytohormone and heavy-metal treatment. Their repression provides resistance to heavy-metal stress, possibly by limiting uptake. Our results systematically reveal the characteristics of HKT family proteins and their encoding genes in six Brassica species and lay a foundation for further exploration of the role of HKT family genes in heavy-metal tolerance.
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Affiliation(s)
- Xiaoran Yang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Ran Hu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Fujun Sun
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Shulin Shen
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Mengzhen Zhang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Yiwei Liu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Yi Zhang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Hai Du
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Kun Lu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Cunmin Qu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Nengwen Yin
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; (X.Y.); (R.H.); (F.S.); (S.S.); (M.Z.); (Y.L.); (Y.Z.); (H.D.); (K.L.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
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Yang M, Chen S, Huang Z, Gao S, Yu T, Du T, Zhang H, Li X, Liu CM, Chen S, Li H. Deep learning-enabled discovery and characterization of HKT genes in Spartina alterniflora. Plant J 2023; 116:690-705. [PMID: 37494542 DOI: 10.1111/tpj.16397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/03/2023] [Accepted: 07/11/2023] [Indexed: 07/28/2023]
Abstract
Spartina alterniflora is a halophyte that can survive in high-salinity environments, and it is phylogenetically close to important cereal crops, such as maize and rice. It is of scientific interest to understand why S. alterniflora can live under such extremely stressful conditions. The molecular mechanism underlying its high-saline tolerance is still largely unknown. Here we investigated the possibility that high-affinity K+ transporters (HKTs), which function in salt tolerance and maintenance of ion homeostasis in plants, are responsible for salt tolerance in S. alterniflora. To overcome the imprecision and unstable of the gene screening method caused by the conventional sequence alignment, we used a deep learning method, DeepGOPlus, to automatically extract sequence and protein characteristics from our newly assemble S. alterniflora genome to identify SaHKTs. Results showed that a total of 16 HKT genes were identified. The number of S. alterniflora HKTs (SaHKTs) is larger than that in all other investigated plant species except wheat. Phylogenetically related SaHKT members had similar gene structures, conserved protein domains and cis-elements. Expression profiling showed that most SaHKT genes are expressed in specific tissues and are differentially expressed under salt stress. Yeast complementation expression analysis showed that type I members SaHKT1;2, SaHKT1;3 and SaHKT1;8 and type II members SaHKT2;1, SaHKT2;3 and SaHKT2;4 had low-affinity K+ uptake ability and that type II members showed stronger K+ affinity than rice and Arabidopsis HKTs, as well as most SaHKTs showed preference for Na+ transport. We believe the deep learning-based methods are powerful approaches to uncovering new functional genes, and the SaHKT genes identified are important resources for breeding new varieties of salt-tolerant crops.
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Affiliation(s)
- Maogeng Yang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
- Key Laboratory of Plant Molecular & Developmental Biology, College of Life Sciences, Yantai University, Yantai, Shandong, China
| | - Shoukun Chen
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Zhangping Huang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
| | - Shang Gao
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
| | - Tingxi Yu
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
| | - Tingting Du
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
| | - Hao Zhang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
| | - Xiang Li
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Chun-Ming Liu
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- School of Advanced Agricultural Sciences, Peking University, Beijing, China
| | - Shihua Chen
- Key Laboratory of Plant Molecular & Developmental Biology, College of Life Sciences, Yantai University, Yantai, Shandong, China
| | - Huihui Li
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Nanfan Research Institute, CAAS, Sanya, Hainan, China
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Chen L, Meng Y, Yang W, Lv Q, Zhou L, Liu S, Tang C, Xie Y, Li X. Genome-wide analysis and identification of TaRING-H2 gene family and TaSDIR1 positively regulates salt stress tolerance in wheat. Int J Biol Macromol 2023:125162. [PMID: 37263334 DOI: 10.1016/j.ijbiomac.2023.125162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/18/2023] [Accepted: 05/29/2023] [Indexed: 06/03/2023]
Abstract
Salt stress is an abiotic stress factor that limits high yields, and thus identifying salt tolerance genes is very important for improving the tolerance of salt in wheat. In this study we identified 274 TaRING-H2 family members and analyzed their gene positions, gene structures, conserved structural domains, promoter cis-acting elements and covariance relationships. And we investigated TaRING-H2-120 (TaSDIR1) in salt stress. Transgenic lines exhibited higher salt tolerance in the germination and seedling stages. Compared with the wild type, overexpression of TaSDIR1 upregulated the expression of genes encoding enzymes related to the control of reactive oxygen species (ROS), thereby reducing the accumulation of ROS, as well as increased the expression of ion transport-related genes to limit the inward flow of Na+ in vivo and maintain a higher K+/Na+ ratio. The expression levels of these genes were opposite in lines where TaSDIR1 was silenced by BSMV-VIGS, and the silenced wheat exhibited higher salt sensitivity. Arabidopsis mutants and heterologous TaSDIR1 overexpressing lines had similar salt stress tolerance phenotypes. We also demonstrated that TaSDIR1 interacted with TaSDIR1P2 in vivo and in vitro. A sequence of 80-100 amino acids in TaSDIR1P2 encoded a coiled coil domain that was important for the activity of E3 ubiquitin ligase, and it was also the core region for the interaction between TaSDIR1 and TaSDIR1P2. Overall, our results suggest that TaSDIR1 positively regulates salt stress tolerance in wheat.
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Affiliation(s)
- Liuping Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ying Meng
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Weibing Yang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Qian Lv
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ling Zhou
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuqing Liu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chenghan Tang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanzhou Xie
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Xuejun Li
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Malambane G, Madumane K, Sewelo LT, Batlang U. Drought stress tolerance mechanisms and their potential common indicators to salinity, insights from the wild watermelon (Citrullus lanatus): A review. Front Plant Sci 2023; 13:1074395. [PMID: 36815012 PMCID: PMC9939662 DOI: 10.3389/fpls.2022.1074395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 11/25/2022] [Indexed: 06/18/2023]
Abstract
Climate change has escalated the effect of drought on crop production as it has negatively altered the environmental condition. Wild watermelon grows abundantly in the Kgalagadi desert even though the environment is characterized by minimal rainfall, high temperatures and intense sunshine during growing season. This area is also characterized by sandy soils with low water holding capacity, thus bringing about drought stress. Drought stress affects crop productivity through its effects on development and physiological functions as dictated by molecular responses. Not only one or two physiological process or genes are responsible for drought tolerance, but a combination of various factors do work together to aid crop tolerance mechanism. Various studies have shown that wild watermelon possess superior qualities that aid its survival in unfavorable conditions. These mechanisms include resilient root growth, timely stomatal closure, chlorophyll fluorescence quenching under water deficit as key physiological responses. At biochemical and molecular level, the crop responds through citrulline accumulation and expression of genes associated with drought tolerance in this species and other plants. Previous salinity stress studies involving other plants have identified citrulline accumulation and expression of some of these genes (chloroplast APX, Type-2 metallothionein), to be associated with tolerance. Emerging evidence indicates that the upstream of functional genes are the transcription factor that regulates drought and salinity stress responses as well as adaptation. In this review we discuss the drought tolerance mechanisms in watermelons and some of its common indicators to salinity at physiological, biochemical and molecular level.
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Hussain S, Zhang R, Liu S, Li R, Zhou Y, Chen Y, Hou H, Dai Q. Transcriptome-Wide Analysis Revealed the Potential of the High-Affinity Potassium Transporter (HKT) Gene Family in Rice Salinity Tolerance via Ion Homeostasis. Bioengineering (Basel) 2022; 9:410. [PMID: 36134956 PMCID: PMC9495969 DOI: 10.3390/bioengineering9090410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
The high-affinity potassium transporter (HKT) genes are key ions transporters, regulating the plant response to salt stress via sodium (Na+) and potassium (K+) homeostasis. The main goal of this research was to find and understand the HKT genes in rice and their potential biological activities in response to brassinosteroids (BRs), jasmonic acid (JA), seawater, and NaCl stress. The in silico analyses of seven OsHKT genes involved their evolutionary tree, gene structures, conserved motifs, and chemical properties, highlighting the key aspects of OsHKT genes. The Gene Ontology (GO) analysis of HKT genes revealed their roles in growth and stress responses. Promoter analysis showed that the majority of the HKT genes participate in abiotic stress responses. Tissue-specific expression analysis showed higher transcriptional activity of OsHKT genes in roots and leaves. Under NaCl, BR, and JA application, OsHKT1 was expressed differentially in roots and shoots. Similarly, the induced expression pattern of OsHKT1 was recorded in the seawater resistant (SWR) cultivar. Additionally, the Na+ to K+ ratio under different concentrations of NaCl stress has been evaluated. Our data highlighted the important role of the OsHKT gene family in regulating the JA and BR mediated rice salinity tolerance and could be useful for rice future breeding programs.
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Yang M, He G, Hou Q, Fan Y, Duan L, Li K, Wei X, Qiu Z, Chen E, He T. Systematic analysis and expression profiles of TCP gene family in Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) revealed the potential function of FtTCP15 and FtTCP18 in response to abiotic stress. BMC Genomics 2022; 23:415. [PMID: 35655134 PMCID: PMC9164426 DOI: 10.1186/s12864-022-08618-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 05/12/2022] [Indexed: 02/01/2023] Open
Abstract
Background As transcription factors, the TCP genes are considered to be promising targets for crop enhancement for their responses to abiotic stresses. However, information on the systematic characterization and functional expression profiles under abiotic stress of TCPs in Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) is limited. Results In this study, we identified 26 FtTCPs and named them according to their position on the chromosomes. Phylogenetic tree, gene structure, duplication events, and cis-acting elements were further studied and syntenic analysis was conducted to explore the bioinformatic traits of the FtTCP gene family. Subsequently, 12 FtTCP genes were selected for expression analysis under cold, dark, heat, salt, UV, and waterlogging (WL) treatments by qRT-PCR. The spatio-temporal specificity, correlation analysis of gene expression levels and interaction network prediction revealed the potential function of FtTCP15 and FtTCP18 in response to abiotic stresses. Moreover, subcellular localization confirmed that FtTCP15 and FtTCP18 localized in the nucleus function as transcription factors. Conclusions In this research, 26 TCP genes were identified in Tartary buckwheat, and their structures and functions have been systematically explored. Our results reveal that the FtTCP15 and FtTCP18 have special cis-elements in response to abiotic stress and conserved nature in evolution, indicating they could be promising candidates for further functional verification under multiple abiotic stresses. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08618-1.
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Ji M, Sun K, Fang H, Zhuang Z, Chen H, Chen Q, Cao Z, Wang Y, Ditta A, Khan MKR, Wang K, Wang B. Genome-wide identification and characterization of the CLASP_N gene family in upland cotton ( Gossypium hirsutum L.). PeerJ 2022; 10:e12733. [PMID: 35036102 PMCID: PMC8734470 DOI: 10.7717/peerj.12733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 12/12/2021] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Cytoplasmic linker-associated proteins (CLASPs) are tubule proteins that can bind to microtubules and participate in regulating the structure and function of microtubules, which significantly affects the development and growth of plants. These proteins have been identified in Arabidopsis; however, little research has been performed in upland cotton. METHODS In this study, the whole genome of the CLASP_N family was analyzed to provide theoretical support for the function of this gene family in the development of upland cotton fiber. Bioinformatics was used to analyze the family characteristics of CLASP_N in upland cotton, such as member identification, sequence characteristics, conserved domain structure and coevolutionary relationships. Real-time fluorescent quantitative PCR (qRT-PCR) was used to clarify the expression pattern of the upland cotton CLASP_N gene family in cotton fiber. RESULTS At the genome-wide level, we identified 16 upland cotton CLASP_N genes. A chromosomal localization analysis revealed that these 16 genes were located on 13 chromosomes. The motif results showed that all CLASP_N proteins have the CLASP_N domain. Gene structure analysis showed that the structure and length of exons and introns were consistent in the subgroups. In the evolutionary analysis with other species, the gene family clearly diverged from the other species in the evolutionary process. A promoter sequence analysis showed that this gene family contains a large number of cis-acting elements related to a variety of plant hormones. qRT-PCR was used to clarify the expression pattern of the upland cotton CLASP_N gene family in cotton fiber and leaves, and Gh210800 was found to be highly expressed in the later stages of fiber development. The results of this study provide a foundation for further research on the molecular role of the CLASP_N genes in cotton fiber development.
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Affiliation(s)
- Meijun Ji
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Kangtai Sun
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Hui Fang
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Zhimin Zhuang
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Haodong Chen
- Cotton Sciences Research Institute of Hunan/ National Hybrid Cotton Research Promotion Center, Changde, Hunan, China
| | - Qi Chen
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Ziyi Cao
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Yiting Wang
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Allah Ditta
- Plant Breeding and Genetics Division, Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - Muhammad Kashif Riaz Khan
- Plant Breeding and Genetics Division, Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - Kai Wang
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
| | - Baohua Wang
- School of Life Sciences, Nantong University, Nantong, Jiangsu, China
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10
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Wu H, Li H, Zhang W, Tang H, Yang L. Transcriptional regulation and functional analysis of Nicotiana tabacum under salt and ABA stress. Biochem Biophys Res Commun 2021; 570:110-116. [PMID: 34280613 DOI: 10.1016/j.bbrc.2021.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 07/05/2021] [Accepted: 07/05/2021] [Indexed: 12/21/2022]
Abstract
Soil salinization is an important factor that restricts crop quality and yield and causes an enormous toll to human beings. Salt stress and abscisic acid (ABA) stress will occur in the process of soil salinization. In this study, transcriptome sequencing of tobacco leaves under salt and ABA stress in order to further study the resistance mechanism of tobacco. Compared with controlled groups, 1654 and 3306 DEGs were obtained in salt and ABA stress, respectively. The genes function enrichment analysis showed that the up-regulated genes in salt stress were mainly concentrated in transcription factor WRKY family and PAR1 resistance gene family, while the up-regulated genes were mainly concentrated on bHLH transcription factor, Kunitz-type protease inhibitor, dehydrin (Xero1) gene and CAT (Catalase) family protein genes in ABA stress. Tobacco MAPK cascade triggered stress response through up-regulation of gene expression in signal transduction. The expression products of these up-regulated genes can improve the abiotic stress resistance of plants. These results have an important implication for further understanding the mechanism of salinity tolerance in plants.
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Affiliation(s)
- Hui Wu
- Agricultural Big-Data Research Center and College of Plant Protection, Shandong Agricultural University, Taian, 271018, China
| | - Huayang Li
- Beijing Key Laboratory of Grape Science and Enology and Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Wenhui Zhang
- Yinan Agricultural Technology Extension Center Agricultural Technology Extension Center of Yinan County, China
| | - Heng Tang
- Agricultural Big-Data Research Center and College of Plant Protection, Shandong Agricultural University, Taian, 271018, China
| | - Long Yang
- Agricultural Big-Data Research Center and College of Plant Protection, Shandong Agricultural University, Taian, 271018, China.
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11
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Mansour MMF, Emam MM, Salama KHA, Morsy AA. Sorghum under saline conditions: responses, tolerance mechanisms, and management strategies. Planta 2021; 254:24. [PMID: 34224010 DOI: 10.1007/s00425-021-03671-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
An overview is presented of recent advances in our knowledge of responses and mechanisms rendering adaptation to saline conditions in sorghum. Different strategies deployed to enhance salinity stress tolerance in sorghum are also pointed out. Salinity stress is a growing problem worldwide. Sorghum is the fifth key crop among cereals. Understanding responses and tolerance strategies in sorghum would be therefore helpful effort for providing biomarkers for designing greatest salinity-tolerant sorghum genotypes. When sorghum exposed to salinity, salinity-tolerant genotypes most probably reprogram their gene expression to activate adaptive biochemical and physiological responses for survival. The review thus discusses the possible physiological and biochemical responses that confer salinity tolerance to sorghum under saline conditions. Although it is not characterized in sorghum, salinity perceiving and transmitting signals to downstream responses via signaling transduction pathways most likely are essential strategy for sorghum adaptation to salinity stress. Sorghum has also shown to withstand moderate saline environments and retain the germination, growth, and photosynthetic activities. Salinity-tolerant sorghum genotypes show the ability to exclude excessive Na+ from reaching shoots and induce ion homeostasis. Osmotic homeostasis and ROS detoxification are also evident as salinity tolerance strategies in sorghum. These above mechanisms lead to re-establishment of cellular ionic, osmotic, and redox homeostasis as well as photosynthesis efficiency. It is noteworthy that these mechanisms act individually or co-operatively to minimize the salinity hazards and enhance acclimation in sorghum. We conclude, however, that although these responses contribute to sorghum tolerance to salinity stress, they seem to be not adequate at higher concentrations of salinity, which agrees with sorghum ranking as moderately salinity-tolerant crop. Also, some of these tolerance strategies reported in other crops are not well studied and documented in sorghum, but most probably have roles in sorghum. Further improvement in sorghum salinity tolerance using different approaches is definitely necessary to meet the requirements of its harsh production environments, and therefore, these approaches are addressed.
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Affiliation(s)
| | - Manal Mohamed Emam
- Department of Botany, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt
| | | | - Amal Ahmed Morsy
- Department of Botany, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt
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12
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Zhang PY, Qiu X, Fu JX, Wang GR, Wei L, Wang TC. Systematic analysis of differentially expressed ZmMYB genes related to drought stress in maize. Physiol Mol Biol Plants 2021; 27:1295-1309. [PMID: 34177148 PMCID: PMC8212317 DOI: 10.1007/s12298-021-01013-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 05/08/2023]
Abstract
UNLABELLED MYB transcription factors play pivotal roles in hormone conduction signaling and abiotic stress response. In this study, 54 differentially expressed ZmMYB genes were identified and comprehensive analyses were conducted including gene's structure, chromosomal localization, phylogenetic tree, motif prediction, cis-elements and expression patterns. The results showed that 54 genes were unevenly distributed on 10 chromosomes and classified into eleven main subgroups by phylogenetic analysis, supported by motif and exon/intron analyses. The mainly stress-related cis-elements were ABRE, ARE, MBS and DRE-core. In addition, 8 core ZmMYB genes were identified by co-expression network. qRT-PCR results showed that the 8 ZmMYB genes exhibited different expression levels under different abiotic stresses, indicating that they were responsive to various abiotic stress. These results will provide insight for further functional investigation of ZmMYB genes. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12298-021-01013-2.
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Affiliation(s)
- Peng-Yu Zhang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
| | - Xiao Qiu
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
| | - Jia-Xu Fu
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
| | - Guo-Rui Wang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
| | - Li Wei
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
| | - Tong-Chao Wang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046 China
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13
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Dan Y, Niu Y, Wang C, Yan M, Liao W. Genome-wide identification and expression analysis of the trehalose-6-phosphate synthase ( TPS) gene family in cucumber ( Cucumis sativus L.). PeerJ 2021; 9:e11398. [PMID: 33987038 PMCID: PMC8092105 DOI: 10.7717/peerj.11398] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/13/2021] [Indexed: 12/11/2022] Open
Abstract
Trehalose-6-phosphate synthase (TPS) is significant in the growth, development and stress resistance of plants. We identified the cucumber TPS family and its physicochemical properties, domains, gene structures, evolutionary relationships, gene locations, cis-acting elements, conserved motifs, and expression patterns using bioinformatics. Our results uncovered seven CsTPS genes in the cucumber genome and named CsTPS1-CsTPS7 according to their locations in the chromosomes. Seven CsTPS genes were randomly distributed in six cucumber chromosomes. Domain analysis showed that the TPS and TPP domains exist in all CsTPSs, and an additional hydrolase-3 domain exist in CsTPS3, CsTPS5 and CsTPS6. Phylogenetic analysis showed that TPS proteins from Arabidopsis, rice, soybean, and cucumber were divided into two subfamilies (Class I and Class II) and they were further divided into seven subgroups. TPS proteins from Arabidopsis and cucumber were grouped together, suggesting a close evolutionary relationship. Gene structure analysis indicated that most Class I genes contained 16-17 introns, while Class II genes (except CsTPS7) had two introns. Motif analysis showed that Class II genes had 10 complete conserved motifs, while Class I genes lacked motif 8 and motif 9. Furthermore, CsTPS genes possessed numerous cis-acting elements related to stress, hormone, and light response in the promoter regions. GO analysis indicated multiple functions for the CsTPS proteins. Expression analysis of CsTPS genes in different tissues found that they were expressed in roots, stems and leaves, with the highest expression levels in roots. The expression analysis of CsTPSs under different treatments showed that CsTPS genes may participate in the response to abiotic stress, plant hormones and sugar treatments.
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Affiliation(s)
- Yuanyuan Dan
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Yuan Niu
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Chunlei Wang
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Mei Yan
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Weibiao Liao
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
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14
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Tounsi S, Saïdi MN, Abdelhedi R, Feki K, Bahloul N, Alcon C, Masmoudi K, Brini F. Functional analysis of TmHKT1;4-A2 promoter through deletion analysis provides new insight into the regulatory mechanism underlying abiotic stress adaptation. Planta 2021; 253:18. [PMID: 33392811 DOI: 10.1007/s00425-020-03533-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
Bioinformatic, molecular, and biochemical analysis were performed to get more insight into the regulatory mechanism by which TmHKT1;4-A2 is regulated. HKT transporters from different plant species have been shown to play important role in plant response to salt. In previous work, TmHKT1;4-A2 gene from Triticum monococcum has been characterized as a major gene for Nax1 QTL (Tounsi et al. Plant Cell Physiol 57:2047-2057, 2016). So far, little is known about its regulatory mechanism. In this study, the promoter region of TmHKT1;4-A2 (1400 bp) was isolated and considered as the full-length promoter (PA2-1400). In silico analysis revealed the presence of important cis-acting elements related to abiotic stresses and phytohormones. Interestingly, our real-time RT-PCR analysis provided evidence that TmHKT1;4-A2 is regulated not only by salt stress but also by osmotic, heavy metal, oxidative, and hormones stresses. In transgenic Arabidopsis plants, TmHKT1;4-A2 is strongly active in vascular tissues of roots and leaves. Through 5'-end deletion analysis, we showed that PA2-1400 promoter is able to drive strong GUS activity under normal conditions and in response to different stresses compared to PA2-824 and PA2-366 promoters. These findings provide new information on the regulatory mechanism of TmHKT1;4-A2 and shed more light on its role under different stresses.
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Affiliation(s)
- Sana Tounsi
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P "1177", 3018, Sfax, Tunisia
| | - Mohamed Najib Saïdi
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P "1177", 3018, Sfax, Tunisia
| | - Rania Abdelhedi
- Laboratory of Molecular and Cellular Screening Processes, Centre of Biotechnology of Sfax, University of Sfax, Route Sidi Mansour, 3018, Sfax, Tunisia
| | - Kaouthar Feki
- Laboratory of Legumes, Centre of Biotechnology Bordj Cedria, BP 901, 2050, Hammam Lif, Tunisia
| | - Noura Bahloul
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P "1177", 3018, Sfax, Tunisia
| | - Carine Alcon
- Biochimie & Physiologie Moléculaire Des Plantes, PHIV Platform, UMR 5004 CNRS/386, INRA/Supagro Montpellier/Université Montpellier 2, Campus Supagro-INRA, 34060, Montpellier Cedex 2, France
| | - Khaled Masmoudi
- Department of Integrative Agriculture, College of Food and Agriculture, United Arab Emirates University, Al Ain, United Arab Emirates.
| | - Faiçal Brini
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P "1177", 3018, Sfax, Tunisia.
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15
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Qin C, Ahanger MA, Lin B, Huang Z, Zhou J, Ahmed N, Ai S, Mustafa NSA, Ashraf M, Zhang L. Comparative transcriptome analysis reveals the regulatory effects of acetylcholine on salt tolerance of Nicotiana benthamiana. Phytochemistry 2021; 181:112582. [PMID: 33246307 DOI: 10.1016/j.phytochem.2020.112582] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 05/08/2023]
Abstract
Salinity is a major cause of crop losses worldwide. Acetylcholine (ACh) can ameliorate the adverse effects of abiotic stresses on plant growth, including salinity stress; however, the underlying molecular mechanisms of this process are unclear. Here, seedlings of Nicotiana benthamiana grown under normal conditions or exposed to 150 mmol L-1 NaCl salinity stress were then treated with a root application of 10 μM ACh. Exogenous ACh application resulted in the downregulation of the activity of the antioxidant enzymes, ascorbate peroxidase, and catalase. ACh-treated plants had lower levels of reactive oxygen species, including the superoxide anion radical and hydrogen peroxide. Transcriptome analysis indicated that ACh treatment under salt stress promoted the differential expression of 658 genes in leaves of N. benthamiana (527 were upregulated and 131 were downregulated). Gene ontology enrichment and Kyoto Encyclopedia of Genes and Genomes pathway analyses revealed that exogenous ACh application was associated with a substantial increase in the transcripts of genes related to cell wall peroxidases, xyloglucan endotransglucosylases or hydrolases, and expansins, indicating that ACh activates cell wall biosynthesis in salt-stressed plants. ACh also enhanced the expression of genes associated with the auxin, gibberellin, brassinosteroid, and salicylic acid signalling pathways, indicating that ACh induces the activation of these pathways under salt stress. Collectively, these findings indicate that ACh-induced salt tolerance in N. benthamiana seedlings is mediated by the inhibition of antioxidant enzymes, activation of cell wall biosynthesis, and hormone signalling pathways. Stress-induced genes involved in osmotic regulation and oxidation resistance were induced by ACh under salt stress. The genes whose transcript levels were elevated by ACh treatment in salt-stressed N. benthamiana could be used as molecular markers of the physiological status of plants under salt stress.
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Affiliation(s)
- Cheng Qin
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China
| | - Mohammad Abass Ahanger
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China
| | - Bo Lin
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China
| | - Ziguang Huang
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China
| | - Jie Zhou
- Cangzhou Central Hospital, 061000 Cangzhou, China
| | - Nadeem Ahmed
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China
| | - Suilong Ai
- Shaanxi Tobacco Scientific Institution, 71000, Xi'an, China
| | - Nabil S A Mustafa
- Department of Pomology, National Research Centre, 12622 Cairo, Egypt
| | - Muhammad Ashraf
- University of Agriculture, Faisalabad, 38000 Faisalabad, Pakistan
| | - Lixin Zhang
- College of Life Sciences, Northwest Agriculture & Forestry University, 712100, Yangling, China.
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