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Moura LMDF, da Costa AC, Müller C, Silva-Filho RDO, Almeida GM, da Silva AA, Capellesso ES, Cunha FN, Teixeira MB. Morpho-Physiological Traits and Oil Quality in Drought-Tolerant Raphanus sativus L. Used for Biofuel Production. PLANTS (BASEL, SWITZERLAND) 2024; 13:1583. [PMID: 38931015 PMCID: PMC11207979 DOI: 10.3390/plants13121583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/28/2024]
Abstract
Raphanus sativus L. is a potential source of raw material for biodiesel fuel due to the high oil content in its grains. In Brazil, this species is cultivated in the low rainfall off-season, which limits the productivity of the crop. The present study investigated the effects of water restriction on the physiological and biochemical responses, production components, and oil quality of R. sativus at different development stages. The treatments consisted of 100% water replacement (control), 66%, and 33% of field capacity during the phenological stages of vegetative growth, flowering, and grain filling. We evaluated characteristics of water relations, gas exchange, chlorophyll a fluorescence, chloroplast pigment, proline, and sugar content. The production components and chemical properties of the oil were also determined at the end of the harvest cycle. Drought tolerance of R. sativus was found to be mediated primarily during the vegetative growth stage by changes in photosynthetic metabolism, stability of photochemical efficiency, increased proline concentrations, and maintenance of tissue hydration. Grain filling was most sensitive to water limitation and showed a reduction in yield and oil content. However, the chemical composition of the oil was not altered by the water deficit. Our data suggest that R. sativus is a drought-tolerant species.
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Affiliation(s)
- Luciana Minervina de Freitas Moura
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
- Centro de Excelência em Agricultura Exponencial (CEAGRE), Rua das Turmalinas, 44—Vila Maria, Rio Verde 75905-360, GO, Brazil;
| | - Alan Carlos da Costa
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
- Centro de Excelência em Agricultura Exponencial (CEAGRE), Rua das Turmalinas, 44—Vila Maria, Rio Verde 75905-360, GO, Brazil;
- Centro de Excelência em Bioinsumos (CEBIO), Rua 88, 30—Setor Sul, Goiânia 74085-010, GO, Brazil
| | - Caroline Müller
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
- Centro de Excelência em Agricultura Exponencial (CEAGRE), Rua das Turmalinas, 44—Vila Maria, Rio Verde 75905-360, GO, Brazil;
| | - Robson de Oliveira Silva-Filho
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
| | - Gabriel Martins Almeida
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
| | - Adinan Alves da Silva
- Laboratório de Ecofisiologia e Produtividade Vegetal, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.M.d.F.M.); (C.M.); (R.d.O.S.-F.); (G.M.A.); (A.A.d.S.)
- Centro de Excelência em Agricultura Exponencial (CEAGRE), Rua das Turmalinas, 44—Vila Maria, Rio Verde 75905-360, GO, Brazil;
| | - Elivane Salete Capellesso
- Laboratório de Ecologia Vegetal, Universidade Federal do Paraná—Centro Politécnico, 100, Curitiba 81530-000, PR, Brazil;
| | - Fernando Nobre Cunha
- Laboratório de Hidráulica e Irrigação, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil;
| | - Marconi Batista Teixeira
- Centro de Excelência em Agricultura Exponencial (CEAGRE), Rua das Turmalinas, 44—Vila Maria, Rio Verde 75905-360, GO, Brazil;
- Laboratório de Hidráulica e Irrigação, Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil;
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Portillo-Estrada M. Limitations of Plant Stress Tolerance upon Heat and CO 2 Exposure in Black Poplar: Assessment of Photosynthetic Traits and Stress Volatile Emissions. PLANTS (BASEL, SWITZERLAND) 2024; 13:1165. [PMID: 38674574 PMCID: PMC11054441 DOI: 10.3390/plants13081165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
Volatile organic compounds (VOCs) emitted by plants may help in understanding the status of a plant's physiology and its coping with mild to severe stress. Future climatic projections reveal that shifts in temperature and CO2 availability will occur, and plants may incur the uncoupling of carbon assimilation and synthesis of key molecules. This study explores the patterns of emissions of key VOCs (isoprene, methanol, acetaldehyde, and acetic acid) emitted by poplar leaves (more than 350) under a combined gradient of temperature (12-42 °C) and air CO2 concentration (400-1500 ppm), along with measurements of photosynthetic rates and stomatal conductance. Isoprene emission exhibited a rise with temperature and CO2 availability, peaking at 39 °C, the temperature at which methanol emission started to peak, illustrating the limit of stress tolerance to severe damage. Isoprene emission was uncoupled from the photosynthesis rate, indicating a shift from the carbon source for isoprene synthesis, while assimilation was decreased. Methanol and acetaldehyde emissions were correlated with stomatal conductance and peaked at 25 °C and 1200 ppm CO2. Acetic acid emissions lacked a clear correlation with stomatal conductance and the emission pattern of its precursor acetaldehyde. This study offers crucial insights into the limitations of photosynthetic carbon and stress tolerance.
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Meng C, Peng X, Zhang Y, Pedro GC, Li Y, Zhang Y, Duan Y, Sun X. Transcriptomic profiling of Poa pratensis L. under treatment of various phytohormones. Sci Data 2024; 11:297. [PMID: 38491031 PMCID: PMC10942976 DOI: 10.1038/s41597-024-03119-0] [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: 09/18/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
Poa pratensis L. (Poaceae) is a valuable grass across the north hemisphere, inhabiting diverse environments with wide altitudinal span, where ubiquitous various kinds of stresses. Phytohormones would be helpful to improve tolerance to abiotic and biotic stresses, but the responses of transcriptome regulation of P. pratensis to exogenous phytohormones application remain unclear. In this study, we explored the alteration of plant physiological responses by the application of phytohormones. Aiming to achieve this knowledge, we got full-length transcriptome data 42.76 Gb, of which 74.9% of transcripts were completed. Then used 27 samples representing four treatments conducted at two time points (1 h and 6 h after application) to generate RNA-seq data. 371 and 907 common DEGs were identified in response to four phytohormones application, respectively, these DEGs were involved in "plant hormone signal transduction", "carbon metabolism" and "plant-pathogen interaction". Finally, P. pratensis basic research can gain valuable information regarding the responses to exogenous application of phytohormones in physiological indicators and transcriptional regulations in order to facilitate the development of new cultivars.
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Affiliation(s)
- Chen Meng
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education and School of Life Sciences, Shaanxi Normal University, Xi'an, 710119, PR China
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaomei Peng
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yu Zhang
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | | | - Yumeng Li
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yanni Zhang
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education and School of Life Sciences, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Yuanwen Duan
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
- University of Chinese Academy of Sciences, Beijing, China.
| | - Xudong Sun
- The Germplasm Bank of Wild Species, Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
- University of Chinese Academy of Sciences, Beijing, China.
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Kumar V, Singh B, Kumar Singh R, Sharma N, Muthamilarasan M, Sawant SV, Prasad M. Histone deacetylase 9 interacts with SiHAT3.1 and SiHDA19 to repress dehydration responses through H3K9 deacetylation in foxtail millet. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:1098-1111. [PMID: 37889853 DOI: 10.1093/jxb/erad425] [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: 09/08/2023] [Accepted: 10/26/2023] [Indexed: 10/29/2023]
Abstract
Climate change inflicts several stresses on plants, of which dehydration stress severely affects growth and productivity. C4 plants possess better adaptability to dehydration stress; however, the role of epigenetic modifications underlying this trait is unclear. In particular, the molecular links between histone modifiers and their regulation remain elusive. In this study, genome-wide H3K9 acetylation (H3K9ac) enrichment using ChIP-sequencing was performed in two foxtail millet cultivars with contrasting dehydration tolerances (IC403579, cv. IC4-tolerant, and IC480117, cv. IC41-sensitive). It revealed that a histone deacetylase, SiHDA9, was significantly up-regulated in the sensitive cultivar. Further characterization indicated that SiHDA9 interacts with SiHAT3.1 and SiHDA19 to form a repressor complex. SiHDA9 might be recruited through the SiHAT3.1 recognition sequence onto the upstream of dehydration-responsive genes to decrease H3K9 acetylation levels. The silencing of SiHDA9 resulted in the up-regulation of crucial genes, namely, SiRAB18, SiRAP2.4, SiP5CS2, SiRD22, SiPIP1;4, and SiLHCB2.3, which imparted dehydration tolerance in the sensitive cultivar (IC41). Overall, the study provides mechanistic insights into SiHDA9-mediated regulation of dehydration stress response in foxtail millet.
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Affiliation(s)
- Verandra Kumar
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, Delhi, India
| | - Babita Singh
- Plant Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, Uttar Pradesh, India
| | - Roshan Kumar Singh
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, Delhi, India
| | - Namisha Sharma
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, Delhi, India
| | | | - Samir V Sawant
- Plant Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, Uttar Pradesh, India
| | - Manoj Prasad
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, Delhi, India
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
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Saini S, Sharma P, Sharma J, Pooja P, Sharma A. Drought stress in Lens culinaris: effects, tolerance mechanism, and its smart reprogramming by using modern biotechnological approaches. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2024; 30:227-247. [PMID: 38623164 PMCID: PMC11016033 DOI: 10.1007/s12298-024-01417-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/20/2024] [Accepted: 02/12/2024] [Indexed: 04/17/2024]
Abstract
Among legumes, lentil serves as an imperative source of dietary proteins and are considered an important pillar of global food and nutritional security. The crop is majorly cultivated in arid and semi-arid regions and exposed to different abiotic stresses. Drought stress is a polygenic stress that poses a major threat to the crop productivity of lentils. It negatively influenced the seed emergence, water relations traits, photosynthetic machinery, metabolites, seed development, quality, and yield in lentil. Plants develop several complex physiological and molecular protective mechanisms for tolerance against drought stress. These complicated networks are enabled to enhance the cellular potential to survive under extreme water-scarce conditions. As a result, proper drought stress-mitigating novel and modern approaches are required to improve lentil productivity. The currently existing biotechnological techniques such as transcriptomics, genomics, proteomics, metabolomics, CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/cas9), and detection of QTLs (quantitative trait loci), proteins, and genes responsible for drought tolerance have gained appreciation among plant breeders for developing climate-resilient lentil varieties. In this review, we critically elaborate the impact of drought on lentil, mechanisms employed by plants to tolerate drought, and the contribution of omics approaches in lentils for dealing with drought, providing deep insights to enhance lentil productivity and improve resistance against abiotic stresses. We hope this updated review will directly help the lentil breeders to develop resistance against drought stress. Graphical Abstract
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Affiliation(s)
- Sakshi Saini
- Department of Botany, Maharshi Dayanand University, Rohtak, Haryana 124001 India
| | - Priyanka Sharma
- Department of Botany, Maharshi Dayanand University, Rohtak, Haryana 124001 India
| | - Jyoti Sharma
- Department of Botany, Maharshi Dayanand University, Rohtak, Haryana 124001 India
| | - Pooja Pooja
- Department of Botany and Physiology, Haryana Agricultural University, Hisar, Haryana 125004 India
| | - Asha Sharma
- Department of Botany, Maharshi Dayanand University, Rohtak, Haryana 124001 India
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Jia M, Ni Y, Zhao H, Liu X, Yan W, Zhao X, Wang J, He B, Liu H. Full-length transcriptome and RNA-Seq analyses reveal the resistance mechanism of sesame in response to Corynespora cassiicola. BMC PLANT BIOLOGY 2024; 24:64. [PMID: 38262910 PMCID: PMC10804834 DOI: 10.1186/s12870-024-04728-y] [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: 05/26/2023] [Accepted: 01/03/2024] [Indexed: 01/25/2024]
Abstract
BACKGROUND Corynespora leaf spot is a common leaf disease occurring in sesame, and the disease causes leaf yellowing and even shedding, which affects the growth quality of sesame. At present, the mechanism of sesame resistance to this disease is still unclear. Understanding the resistance mechanism of sesame to Corynespora leaf spot is highly important for the control of infection. In this study, the leaves of the sesame resistant variety (R) and the sesame susceptible variety (S) were collected at 0-48 hpi for transcriptome sequencing, and used a combined third-generation long-read and next-generation short-read technology approach to identify some key genes and main pathways related to resistance. RESULTS The gene expression levels of the two sesame varieties were significantly different at 0, 6, 12, 24, 36 and 48 hpi, indicating that the up-regulation of differentially expressed genes in the R might enhanced the resistance. Moreover, combined with the phenotypic observations of sesame leaves inoculated at different time points, we found that 12 hpi was the key time point leading to the resistance difference between the two sesame varieties at the molecular level. The WGCNA identified two modules significantly associated with disease resistance, and screened out 10 key genes that were highly expressed in R but low expressed in S, which belonged to transcription factors (WRKY, AP2/ERF-ERF, and NAC types) and protein kinases (RLK-Pelle_DLSV, RLK-Pelle_SD-2b, and RLK-Pelle_WAK types). These genes could be the key response factors in the response of sesame to infection by Corynespora cassiicola. GO and KEGG enrichment analysis showed that specific modules could be enriched, which manifested as enrichment in biologically important pathways, such as plant signalling hormone transduction, plant-pathogen interaction, carbon metabolism, phenylpropanoid biosynthesis, glutathione metabolism, MAPK and other stress-related pathways. CONCLUSIONS This study provides an important resource of genes contributing to disease resistance and will deepen our understanding of the regulation of disease resistance, paving the way for further molecular breeding of sesame.
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Affiliation(s)
- Min Jia
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
- Key Laboratory of Specific Oilseed Crops Genomics of Henan Province, Henan Sesame Research Center, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Yunxia Ni
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China.
- Key Laboratory of Specific Oilseed Crops Genomics of Henan Province, Henan Sesame Research Center, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China.
| | - Hui Zhao
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
- Key Laboratory of Specific Oilseed Crops Genomics of Henan Province, Henan Sesame Research Center, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Xintao Liu
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Wenqing Yan
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Xinbei Zhao
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Jing Wang
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Bipo He
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China
| | - Hongyan Liu
- Key Laboratory of IPM of Pests on Crop (Southern North China), Ministry of Agriculture, Key Laboratory of Crop Pest Control of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China.
- Key Laboratory of Specific Oilseed Crops Genomics of Henan Province, Henan Sesame Research Center, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, 450002, China.
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Zuo G, Huo J, Yang X, Mei W, Zhang R, Khan A, Feng N, Zheng D. Photosynthetic mechanisms underlying NaCl-induced salinity tolerance in rice (Oryza sativa). BMC PLANT BIOLOGY 2024; 24:41. [PMID: 38195408 PMCID: PMC10777521 DOI: 10.1186/s12870-024-04723-3] [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: 11/14/2023] [Accepted: 01/01/2024] [Indexed: 01/11/2024]
Abstract
BACKGROUND Salinity stress is an environmental constraint that normally develops concurrently under field conditions, resulting in drastic limitation of rice plant growth and grain productivity. The objective of this study was to explore the alleviating effects of NaCl pre-treatment on rice seedlings as well as the salt tolerance mechanisms by evaluating morph-physiological traits. RESULTS Variety Huanghuazhan, either soaked in distilled water or 25 mg/L Prohexadione calcium (Pro-Ca), were first hardened with varying concentrations of NaCl solutions (0 and 50 mM NaCl), and then subjected to varying degrees of salt stress (0 and 100 mM NaCl), indicated by S0, S1, S2 and S3, respectively. Growth analysis suggested that NaCl-pretreatment improved the root/shoot ratio in water-soaked rice plant at DAP 0. Data related to the reaction center density, photosynthetic electron transport efficiency, trapping efficiency were compared before (CK) using performance Index (PIabs). Compared to S2 (Pro-Ca-S2) treatment, PIabs did not show any difference with plants pre-treated with NaCl (S3 or Pro-Ca-S3). Rather than PIabs, significant difference was found in photosynthetic electron transport efficiency (ΨEo). The ΨEo value in Pro-S2 was significantly lowered as compared to Pro-S3 treatment at DAP 7, and the decrease rate was about 6.5%. Correlation analysis indicated leaf PIabs was weak correlated with plant biomass while the quantum yield for reduction of the PSI end electron acceptors, trapped energy flux per reaction center and PSII antenna size displayed strong positive correlation with biomass. Additional analysis revealed that 100 mM NaCl significantly reduced leaf linear electron flux under low-light conditions, regardless of whether seedlings had been pre-treated with 50 mM NaCl or not. CONCLUSIONS NaCl-induced salt tolerance was related to the robust photosynthetic machinery.
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Affiliation(s)
- Guanqiang Zuo
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
- College of Natural Resources and Environment, Northwest A&F University, Xianyang, 712100, China
| | - Jingxin Huo
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
| | - Xiaohui Yang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
| | - Wanqi Mei
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
| | - Rui Zhang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
| | - Aaqil Khan
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
| | - Naijie Feng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China
- National Saline-tolerant Rice Technology Innovation Center, South China, Zhanjiang, 524008, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518108, China
| | - Dianfeng Zheng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524008, China.
- National Saline-tolerant Rice Technology Innovation Center, South China, Zhanjiang, 524008, China.
- Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518108, China.
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