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Yang C, Zhang Z, Yuan Y, Zhang D, Jin H, Li Y, Du S, Li X, Fang B, Wei F, Yan G. Natural variation in photosynthetic electron transport of wheat flag leaves in response to dark-induced senescence. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 259:113018. [PMID: 39182402 DOI: 10.1016/j.jphotobiol.2024.113018] [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: 04/26/2024] [Revised: 08/11/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
Early leaf senescence affects photosynthetic efficiency and limits growth during the late production stage of winter wheat (Triticum aestivum). Natural variation in photosystem response to senescence represents a valuable resource for improving the aging traits of flag leaves. To explore the natural variation of different phases of photosynthetic electron transport in modern wheat cultivars during senescence, we exposed the flag leaves of 32 wheat cultivars to dark conditions to induce senescence process, and simultaneously measured prompt fluorescence and modulated 820 nm reflection. The results showed that the chlorophyll content, activity of PSII donor side, PSI and electron transfer between PSII and PSI were all decreased during dark-induced senescence, but they showed different sensitivity to dark-induced senescence. Furthermore, natural variation in photosynthetic parameters among the 32 wheat cultivars were also observed and showed by variation coefficient of the different parameters. We observed that PSII and PSI activity showed less sensitivity to dark-induced senescence than electron transfer between them, while PSII and PSI activity exhibit greater natural variation than electron transport between PSII and PSI. It suggests that Cytb6f might degrade faster and have less variation than PSII and PSI during dark-induced senescence.
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Affiliation(s)
- Cheng Yang
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Zishan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Yuan Yuan
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Deqi Zhang
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Haiyang Jin
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Ying Li
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Simeng Du
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Xiangdong Li
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China.
| | - Baoting Fang
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China
| | - Fang Wei
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China.
| | - Ge Yan
- Wheat Research Institute, Henan Academy of Agricultural Sciences, Postgraduate T&R Base of Zhengzhou University, Zhengzhou 450002, China; School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China.
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Gao Y, Yang J, Duan W, Ma X, Qu L, Xu Z, Yang Y, Xu J. NtRAV4 negatively regulates drought tolerance in Nicotiana tabacum by enhancing antioxidant capacity and defence system. PLANT CELL REPORTS 2022; 41:1775-1788. [PMID: 35789421 DOI: 10.1007/s00299-022-02896-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
KEY MESSAGE NtRAV4 is a nucleus-localised protein and no self-activation effect. ntrav4 mutants maintain the steady state of the ROS system under drought stress by enhancing antioxidant capacity and defence system. The APETALA2/ethylene response factor (AP2/ERF) transcription factor (TF) family plays an important role in plant responses to environmental stresses. In this study, we identified a novel NtRAV4 TF, a member of RAV subfamily among AP2/ERF gene family, which have AP2 and B3 domain in its N- and C-terminus, respectively. Subcellular localisation and self-activation activity analysis revealed that NtRAV4 localised in the nucleus and had no self-activation effect. The overexpression and gene editing vectors of NtRAV4 were constructed by homologous recombination and CRISPR/Cas9 gene editing methods, and transformed into tobacco by agrobacterium-mediated method. ntrav4 led to the appearance of termination codon in advance and lacked the unique B3 domain of RAV subfamily protein. Further analysis displayed that knockout of the NtRAV4 in tobacco increased drought tolerance with high relative water content, accompanied by reduced stomatal aperture, density, and stomatal opening ratio compared to overexpression lines and WT. Moreover, ntrav4 knockout plants also exhibited increased osmotic tolerance with low malondialdehyde (MDA) and ion leakage (EL), less accumulation of O2•- and H2O2, and high enzymatic antioxidant (SOD, POD, CAT) activities, non-enzymatic antioxidant (AsA-GSH cycle) contents and hormone (IAA, ABA, GA3, and ZR) levels under drought stress. Furthermore, ntrav4 mutants in tobacco improved the expression levels of ROS-related proline synthesis and stress-responsive genes under osmotic stress. Our results indicate that NtRAV4 negatively regulates plant tolerance to drought stress by reducing water loss and activating the antioxidant system and stress-related gene expression to maintain the steady state of the ROS system.
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Affiliation(s)
- Yun Gao
- National Tobacco Cultivation and Physiology and Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jie Yang
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610000, China
| | - Wangjun Duan
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610000, China
| | - Xiaohan Ma
- National Tobacco Cultivation and Physiology and Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Lili Qu
- National Tobacco Cultivation and Physiology and Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zicheng Xu
- National Tobacco Cultivation and Physiology and Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yongxia Yang
- National Tobacco Cultivation and Physiology and Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Jiayang Xu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou, 450002, China.
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Yan K, Mei H, Dong X, Zhou S, Cui J, Sun Y. Dissecting photosynthetic electron transport and photosystems performance in Jerusalem artichoke ( Helianthus tuberosus L.) under salt stress. FRONTIERS IN PLANT SCIENCE 2022; 13:905100. [PMID: 35968142 PMCID: PMC9363833 DOI: 10.3389/fpls.2022.905100] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Jerusalem artichoke (Helianthus tuberosus L.), a vegetable with medical applications, has a strong adaptability to marginal barren land, but the suitability as planting material in saline land remains to be evaluated. This study was envisaged to examine salt tolerance in Jerusalem artichoke from the angle of photosynthetic apparatus stability by dissecting the photosynthetic electron transport process. Potted plants were exposed to salt stress by watering with a nutrient solution supplemented with NaCl. Photosystem I (PSI) and photosystem II (PSII) photoinhibition appeared under salt stress, according to the significant decrease in the maximal photochemical efficiency of PSI (△MR/MR0) and PSII. Consistently, leaf hydrogen peroxide (H2O2) concentration and lipid peroxidation were remarkably elevated after 8 days of salt stress, confirming salt-induced oxidative stress. Besides photoinhibition of the PSII reaction center, the PSII donor side was also impaired under salt stress, as a K step emerged in the prompt chlorophyll transient, but the PSII acceptor side was more vulnerable, considering the decreased probability of an electron movement beyond the primary quinone (ETo/TRo) upon depressed upstream electron donation. The declined performance of entire PSII components inhibited electron inflow to PSI, but severe PSI photoinhibition was not averted. Notably, PSI photoinhibition elevated the excitation pressure of PSII (1-qP) by inhibiting the PSII acceptor side due to the negative and positive correlation of △MR/MR0 with 1-qP and ETo/TRo, respectively. Furthermore, excessive reduction of PSII acceptors side due to PSI photoinhibition was simulated by applying a specific inhibitor blocking electron transport beyond primary quinone, demonstrating that PSII photoinhibition was actually accelerated by PSI photoinhibition under salt stress. In conclusion, PSII and PSI vulnerabilities were proven in Jerusalem artichoke under salt stress, and PSII inactivation, which was a passive consequence of PSI photoinhibition, hardly helped protect PSI. As a salt-sensitive species, Jerusalem artichoke was recommended to be planted in non-saline marginal land or mild saline land with soil desalination measures.
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Affiliation(s)
- Kun Yan
- School of Agriculture, Ludong University, Yantai, China
| | - Huimin Mei
- School of Life Sciences, Liaoning University, Shenyang, China
| | - Xiaoyan Dong
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, China
| | - Shiwei Zhou
- School of Agriculture, Ludong University, Yantai, China
| | - Jinxin Cui
- School of Agriculture, Ludong University, Yantai, China
| | - Yanhong Sun
- School of Environmental and Material Engineering, Yantai University, Yantai, China
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4
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Abu-Ghosh S, Iluz D, Dubinsky Z, Miller G. Exogenous Abscisic Acid Confers Salinity Tolerance in Chlamydomonas reinhardtii During Its Life Cycle. JOURNAL OF PHYCOLOGY 2021; 57:1323-1334. [PMID: 33963561 DOI: 10.1111/jpy.13174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 03/03/2021] [Indexed: 06/12/2023]
Abstract
The plant hormone abscisic acid (ABA) coordinates responses to environmental signals with developmental changes and is important for stress resilience and crop yield. However, fundamental questions remain about how this phytohormone affects microalgal growth and stress regulation throughout the different stages of their life cycle. In this study, the effects of ABA on the physiology of the freshwater microalga Chlamydomonas reinhardtii at its different life cycle stages were investigated. Exogenously added ABA enhanced the growth and photosynthesis of C. reinhardtii during the vegetative stage. The hormone also increased the tolerance of this alga to high-salinity stress during gamete formation under nutrient depletion, as well as it extended their survival. We show that the level of reactive oxygen species (ROS) generated in the ABA-treated cells was significantly less than that in the untreated cells under inhibiting NaCl concentrations. Cell size examination showed that ABA prevents cells from forming palmella when exposed to high salinity. All together, these results suggest that ABA can support the vitality and survival of C. reinhardtii under high salt conditions.
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Affiliation(s)
- Said Abu-Ghosh
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - David Iluz
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- Environmental Sciences and Agriculture, Beit Berl Academic College, Kfar Saba, Israel
- Deptartment of science, Talpiot Academic College, Holon, Israel
| | - Zvy Dubinsky
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Gad Miller
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
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5
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Dubey AK, Khatri K, Jha B, Rathore MS. The novel galactosyl transferase-like (SbGalT) gene from Salicornia brachiata maintains photosynthesis and enhances abiotic stress tolerance in transgenic tobacco. Gene 2021; 786:145597. [PMID: 33766708 DOI: 10.1016/j.gene.2021.145597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/09/2021] [Accepted: 03/16/2021] [Indexed: 11/25/2022]
Abstract
We hereby report in planta function characterization of a novel galactosyl transferase-like (SbGalT) gene from Salicornia brachiata for enhanced abiotic stress tolerance. The SbGalT gene had an open reading frame of 1563 bp. The ectopic expression of SbGalT gene in tobacco improved the seed germination, seedling growth, biomass accumulation and potassium/sodium ratio under salt and osmotic stress. The SbGalT over-expression delayed stress-induced senescence, pigment break-down and ion induced cytotoxicity in tobacco. Higher contents of organic solutes and potassium under stress maintained the osmotic homeostasis and relative water content in tobacco. Higher activity of antioxidant enzymes under stress in transgenic tobacco curtailed the accumulation of reactive oxygen species (ROS) and maintained the membrane integrity. The chlorophyll a fluorescence transient indicated no effects of the imposed strengths of stress on basal state of photosystem (PS) I in transgenic tobacco over-expressing the SbGalT gene. Due to improved membrane integrity, the transgenic tobacco exhibited improved photosynthesis, stomatal conductance, intercellular CO2, transpiration, maximum quantum yield and operating efficiency of PSII, electron transport, photochemical and non-photochemical quenching. In agreement with photosynthesis, physiological health, tolerance index and growth parameters, transgenic tobacco accumulated higher contents of sugar, starch, amino acid, polyphenol and proline under stress conditions. The multivariate data analysis exhibited significant statistical distinctions among osmotic adjustment, physiological health and growth, and photosynthetic responses in control and SbGalT transgenic tobacco under stress conditions. The results strongly indicated novel SbGalT gene as a potential candidate for developing the smart agriculture.
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Affiliation(s)
- Ashish K Dubey
- Applied Phycology and Biotechnology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, Gujarat 364001, India
| | - Kusum Khatri
- Applied Phycology and Biotechnology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, Gujarat 364001, India
| | - Bhavanath Jha
- Applied Phycology and Biotechnology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, Gujarat 364001, India
| | - Mangal S Rathore
- Applied Phycology and Biotechnology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, Gujarat 364001, India.
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6
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Huihui Z, Yue W, Xin L, Guoqiang H, Yanhui C, Zhiyuan T, Jieyu S, Nan X, Guangyu S. Chlorophyll synthesis and the photoprotective mechanism in leaves of mulberry (Morus alba L.) seedlings under NaCl and NaHCO 3 stress revealed by TMT-based proteomics analyses. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 190:110164. [PMID: 31927191 DOI: 10.1016/j.ecoenv.2020.110164] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/12/2019] [Accepted: 01/02/2020] [Indexed: 05/20/2023]
Abstract
Chlorophyll (Chl) and effective photoprotective mechanism are important prerequisites to ensure the photosynthetic function of plants under stress. In this study, the effects of 100 mmol L-1 NaCl and NaHCO3 stress on chlorophyll synthesis and photosynthetic function of mulberry seedlings were studied by physiological combined with proteomics technology. The results show that: NaCl stress had little effect on the expression of Chl synthesis related proteins, and there were no significant changes in Chl content and Chl a:b ratio. However, 13 of the 15 key proteins in the process of Chl synthesis were significantly decreased under NaHCO3 stress, and the contents of Chl a and Chl b were significantly decreased (especially Chl a). Although stomatal conductance (Gs) decreased significantly under NaCl stress, net photosynthetic rate (Pn), PSII maximum photochemical efficiency (Fv/Fm) and electron transfer rate (ETR) did not change significantly, but under NaHCO3 stress, not only Gs decreased significantly, PSII activity and photosynthetic carbon were the same. In the photoprotective mechanism under NaCl stress, NAD(P)H dehydrogenase (NDH)-dependent cyclic electron flow (CEF) enhanced, the expression of related proteins subunit, ndhH, ndhI, ndhK, and ndhM, the key enzyme of the xanthophyll cycle, violaxanthin de-epoxidase (VDE) were up-regulated, the ratio of (A + Z)/(V + A + Z) and non-photochemical quenching (NPQ) was increased. The expressions of proteins FTR and Fd-NiR were also significant up-regulated under NaCl stress, Fd-dependent ROS metabolism and nitrogen metabolism can effectively reduce the electronic pressure on Fd. Under NaHCO3 stress, the expressions of NDH-dependent CEF related proteins subunit (ndhH, ndhI, ndhK, ndhM and ndhN), VDE, ZE, FTR, Fd-NiR and Fd-GOGAT, were significant down-regulated, and ZE, CP26, ndhK, ndhM, Fd-NiR, Fd-GOGAT and FTR genes expression also significantly decreased, the photoprotective mechanism, like the xanthophyll cycle,CEF and Fd-dependent ROS metabolism and nitrogen metabolism might be damaged, resulting in the inhibition of PSII electron transfer and carbon assimilation in mulberry leaves under NaHCO3 stress.
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Affiliation(s)
- Zhang Huihui
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China; Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Wang Yue
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Li Xin
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China; Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - He Guoqiang
- Mudanjang Tobacco Science Research Institute, Mudanjang, Heilongjiang, China
| | - Che Yanhui
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Teng Zhiyuan
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Shao Jieyu
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Xu Nan
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China; Natural Resources and Ecology Institute, Heilongjiang Sciences Academy, Harbin, Heilongjiang, China.
| | - Sun Guangyu
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China.
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Chen Z, Xu J, Wang F, Wang L, Xu Z. Morpho-physiological and proteomic responses to water stress in two contrasting tobacco varieties. Sci Rep 2019; 9:18523. [PMID: 31811189 PMCID: PMC6898209 DOI: 10.1038/s41598-019-54995-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/20/2019] [Indexed: 02/08/2023] Open
Abstract
To gain insight into the molecular mechanisms underpinning tobacco (Nicotiana tabacum) tolerance to drought stress, we integrated anatomical, physiological, and proteomic analyses of drought-tolerant (Yuyan6, [Y6]) and -sensitive (Yunyan87 [Y87]) varieties. In comparison to Y87, Y6 exhibited higher water retention capability, improved photosynthetic performance, delayed leaf-senescence, stable leaf ultrastructure, a stronger antioxidant defense, and lesser ROS accumulation when subjected to water stress. Using an iTRAQ-based proteomics approach, 405 and 1,560 differentially accumulated proteins (DAPs) were identified from Y6 and Y87 plants, respectively, of which 114 were found to be present in both cultivars. A subsequent functional characterization analysis revealed that these DAPs were significantly enriched in eight biological processes, six molecular functions, and six cellular components and displayed differential expression patterns in Y6 and Y87 plants, suggesting that the response to water stress between both varieties differed at the proteomic level. Furthermore, we constructed protein coexpression networks and identified hub proteins regulating tobacco defenses to water stress. Additionally, qPCR analysis indicated that the majority of genes encoding selected proteins showed consistency between mRNA levels and their corresponding protein expression levels. Our results provide new insights into the genetic regulatory mechanisms associated with drought response in tobacco plants.
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Affiliation(s)
- Zheng Chen
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jiayang Xu
- Agronomy and Biotechnology College, China Agricultural University, Beijing, 100193, China
| | - Fazhan Wang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Lin Wang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zicheng Xu
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, China.
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8
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Hui-Hui Z, Guang-Liang S, Jie-Yu S, Xin L, Ma-Bo L, Liang M, Nan X, Guang-Yu S. Photochemistry and proteomics of mulberry (Morus alba L.) seedlings under NaCl and NaHCO 3 stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 184:109624. [PMID: 31487570 DOI: 10.1016/j.ecoenv.2019.109624] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/16/2019] [Accepted: 08/28/2019] [Indexed: 05/20/2023]
Abstract
In order to explore the response and adaptation mechanisms of photosynthesis of the leaves of mulberry (Morus alba L.) seedlings to saline-alkali stress. Photosynthetic activity, and the response of related proteomics of M. alba seedling leaves under NaCl and NaHCO3 stress were studied by using chlorophyll fluorescence and gas exchange technique combined with TMT proteomics. The results showed that NaCl stress had no significant effect on photosystem II (PSII) activity in M. alba seedling leaves. In addition, the expressions of proteins of the PSII oxygen-evolving complex (OEE3-1 and PPD4) and the LHCII antenna (CP24 10A, CP26, and CP29) were increased, and the photosystem I (PSI) activity in the leaves of M. alba seedlings was increased, as well as expressions of proteins, such as PsaF, PsaG, PsaH, PsaL, PsaN, and Ycf4. Under NaHCO3 stress, the activity of PSII and PSI and the expression of their protein complexes and the electron transfer-related proteins significantly decreased. NaCl stress had little effect on RuBP regeneration during dark reaction in the leaves and the expressions of glucose synthesis related proteins and net photosynthetic rate (Pn) did not decrease significantly. The leaves could adapt to NaCl stress by reducing stomatal conductance (Gs) and increasing water use efficiency (WUE). Under NaHCO3 stress, the expression of dark reaction-related proteins was mostly down-regulated, while Gs was reduced, which indicated that non-stomatal factors can be responsible for inhibition of carbon assimilation.
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Affiliation(s)
- Zhang Hui-Hui
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Shi Guang-Liang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Shao Jie-Yu
- College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China
| | - Li Xin
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Li Ma-Bo
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Meng Liang
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Xu Nan
- College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China; Natural Resources and Ecology Institute, Heilongjiang Sciences Academy, Harbin, Heilongjiang, China.
| | - Sun Guang-Yu
- College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, China.
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9
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Hernández JA. Salinity Tolerance in Plants: Trends and Perspectives. Int J Mol Sci 2019; 20:ijms20102408. [PMID: 31096626 PMCID: PMC6567217 DOI: 10.3390/ijms20102408] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 05/14/2019] [Indexed: 12/30/2022] Open
Abstract
Salinity stress is one of the more prevailing abiotic stresses which results in significant losses in agricultural crop production, particularly in arid and semi-arid areas [...].
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Affiliation(s)
- Jose Antonio Hernández
- Group of Fruit Trees Biotechnology, Dept. Plant Breeding, CEBAS-CSIC, Campus Universitario de Espinardo, 25, 30100 Murcia, Spain.
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10
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Yan K, Bian T, He W, Han G, Lv M, Guo M, Lu M. Root Abscisic Acid Contributes to Defending Photoinibition in Jerusalem Artichoke ( Helianthus tuberosus L.) under Salt Stress. Int J Mol Sci 2018; 19:E3934. [PMID: 30544576 PMCID: PMC6321411 DOI: 10.3390/ijms19123934] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 11/29/2018] [Accepted: 12/04/2018] [Indexed: 11/24/2022] Open
Abstract
The aim of the study was to examine the role of root abscisic acid (ABA) in protecting photosystems and photosynthesis in Jerusalem artichoke against salt stress. Potted plants were pretreated by a specific ABA synthesis inhibitor sodium tungstate and then subjected to salt stress (150 mM NaCl). Tungstate did not directly affect root ABA content and photosynthetic parameters, whereas it inhibited root ABA accumulation and induced a greater decrease in photosynthetic rate under salt stress. The maximal photochemical efficiency of PSII (Fv/Fm) significantly declined in tungstate-pretreated plants under salt stress, suggesting photosystem II (PSII) photoinhibition appeared. PSII photoinhibition did not prevent PSI photoinhibition by restricting electron donation, as the maximal photochemical efficiency of PSI (ΔMR/MR₀) was lowered. In line with photoinhibition, elevated H₂O₂ concentration and lipid peroxidation corroborated salt-induced oxidative stress in tungstate-pretreated plants. Less decrease in ΔMR/MR₀ and Fv/Fm indicated that PSII and PSI in non-pretreated plants could maintain better performance than tungstate-pretreated plants under salt stress. Consistently, greater reduction in PSII and PSI reaction center protein abundance confirmed the elevated vulnerability of photosystems to salt stress in tungstate-pretreated plants. Overall, the root ABA signal participated in defending the photosystem's photoinhibition and protecting photosynthesis in Jerusalem artichoke under salt stress.
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Affiliation(s)
- Kun Yan
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| | - Tiantian Bian
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
- School of Life Sciences, Ludong University, Yantai 264025, China.
| | - Wenjun He
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| | - Guangxuan Han
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| | - Mengxue Lv
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| | - Mingzhu Guo
- College of Life Sciences, Yantai University, Yantai 264005, China.
| | - Ming Lu
- College of Life Sciences, Yantai University, Yantai 264005, China.
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Çiçek N, Oukarroum A, Strasser RJ, Schansker G. Salt stress effects on the photosynthetic electron transport chain in two chickpea lines differing in their salt stress tolerance. PHOTOSYNTHESIS RESEARCH 2018; 136:291-301. [PMID: 29124653 DOI: 10.1007/s11120-017-0463-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 10/27/2017] [Indexed: 05/07/2023]
Abstract
The main objective of this study was to evaluate the effects of salt stress on the photosynthetic electron transport chain using two chickpea lines (Cicer arietinum L.) differing in their salt stress tolerance at the germination stage (AKN 87 and AKN 290). Two weeks after sowing, seedlings were exposed to salt stress for 2 weeks and irrigated with 200 ml of 200 mM NaCl every 2 days. The polyphasic OJIP fluorescence transient and the 820-nm transmission kinetics (photosystem I) were used to evaluate the effects of salt stress on the functionality of the photosynthetic electron transport chain. It was observed that a signature for salt stress was a combination of a higher J step (VJ), a smaller IP amplitude, and little or no effect on the primary quantum yield of PSII (φPo). We observed for AKN 290 a shorter leaf life cycle, which may represent a mechanism to cope with salt stress. For severely salt-stressed leaves, an inhibition of electron flow between the PQ pool and P700 was found. The data also suggest that the properties of electron flow beyond PSI are affected by salt stress.
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Affiliation(s)
- Nuran Çiçek
- Department of Biology, Faculty of Science, Hacettepe University, 06800, Ankara, Turkey.
| | - Abdallah Oukarroum
- AgroBioSciences Division, University Mohammed VI Polytechnic (UM6P), Lot-660 Hay Moulay Rachid, 43150, Ben Guerir, Morocco
| | - Reto J Strasser
- Bioenergetics and Microbiology Laboratory, University of Geneva, 1254, Jussy-Geneva, Switzerland
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Swapnil P, Rai AK. Physiological responses to salt stress of salt-adapted and directly salt (NaCl and NaCl+Na 2SO 4 mixture)-stressed cyanobacterium Anabaena fertilissima. PROTOPLASMA 2018; 255:963-976. [PMID: 29352355 DOI: 10.1007/s00709-018-1205-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/10/2018] [Indexed: 05/13/2023]
Abstract
Soil salinity in nature is generally mixed type; however, most of the studies on salt toxicity are performed with NaCl and little is known about sulfur type of salinity (Na2SO4). Present study discerns the physiologic mechanisms responsible for salt tolerance in salt-adapted Anabaena fertilissima, and responses of directly stressed parent cells to NaCl and NaCl+Na2SO4 mixture. NaCl at 500 mM was lethal to the cyanobacterium, whereas salt-adapted cells grew luxuriantly. Salinity impaired gross photosynthesis, electron transport activities, and respiration in parent cells, but not in the salt-adapted cells, except a marginal increase in PSI activity. Despite higher Na+ concentration in the salt mixture, equimolar NaCl appeared more inhibitive to growth. Sucrose and trehalose content and antioxidant activities were maximal in 250 mM NaCl-treated cells, followed by salt mixture and was almost identical in salt-adapted (exposed to 500 mm NaCl) and control cells, except a marginal increase in ascorbate peroxidase activity and an additional fourth superoxide dismutase isoform. Catalase isoform of 63 kDa was induced only in salt-stressed cells. Salinity increased the uptake of intracellular Na+ and Ca2+ and leakage of K+ in parent cells, while cation level in salt-adapted cells was comparable to control. Though there was differential increase in intracellular Ca2+ under different salt treatments, ratio of Ca2+/Na+ remained the same. It is inferred that stepwise increment in the salt concentration enabled the cyanobacterium to undergo priming effect and acquire robust and efficient defense system involving the least energy.
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Affiliation(s)
- Prashant Swapnil
- Department of Botany, Banaras Hindu University, Varanasi, 221005, India
| | - Ashwani K Rai
- Department of Botany, Banaras Hindu University, Varanasi, 221005, India.
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Yan K, Zhao S, Cui M, Han G, Wen P. Vulnerability of photosynthesis and photosystem I in Jerusalem artichoke (Helianthus tuberosus L.) exposed to waterlogging. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 125:239-246. [PMID: 29477087 DOI: 10.1016/j.plaphy.2018.02.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 02/13/2018] [Accepted: 02/13/2018] [Indexed: 05/25/2023]
Abstract
Jerusalem artichoke (Helianthus tuberosus L.) is an important energy crop for utilizing coastal marginal land. This study was to investigate waterlogging tolerance of Jerusalem artichoke through photosynthetic diagnose with emphasis on photosystem II (PSII) and photosystem I (PSI) performance. Potted plants were subjected to severe (liquid level 5 cm above vermiculite surface) and moderate (liquid level 5 cm below vermiculite surface) waterlogging for 9 days. Large decreased photosynthetic rate suggested photosynthesis vulnerability upon waterlogging. After 7 days of severe waterlogging, PSII and PSI photoinhibition arose, indicated by significant decrease in the maximal photochemical efficiency of PSII (Fv/Fm) and PSI (△MR/MR0), and PSI seemed more vulnerable because of greater decrease in △MR/MR0 than Fv/Fm. In line with decreased △MR/MR0 and unchanged Fv/Fm after 9 days of moderate waterlogging, the amount of PSI reaction center protein rather than PSII reaction center protein was lowered, confirming greater PSI vulnerability. According to positive correlation between △MR/MR0 and efficiency that an electron moves beyond primary quinone and negative correlation between △MR/MR0 and PSII excitation pressure, PSI inactivation elevated PSII excitation pressure by depressing electron transport at PSII acceptor side. Thus, PSI vulnerability induced PSII photoinhibition and endangered the stability of whole photosynthetic apparatus under waterlogging. In agreement with photosystems photoinhibition, elevated H2O2 concentration and lipid peroxidation in the leaves corroborated waterlogging-induced oxidative stress. In conclusion, Jerusalem artichoke is a waterlogging sensitive species in terms of photosynthesis and PSI vulnerability. Consistently, tuber yield was tremendously reduced by waterlogging, confirming waterlogging sensitivity of Jerusalem artichoke.
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Affiliation(s)
- Kun Yan
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.
| | - Shijie Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Mingxing Cui
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
| | - Guangxuan Han
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.
| | - Pei Wen
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
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Biphasic ROS accumulation and programmed cell death in a cyanobacterium exposed to salinity (NaCl and Na 2 SO 4 ). ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.01.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kumari J, Udawat P, Dubey AK, Haque MI, Rathore MS, Jha B. Overexpression of SbSI-1, A Nuclear Protein from Salicornia brachiata Confers Drought and Salt Stress Tolerance and Maintains Photosynthetic Efficiency in Transgenic Tobacco. FRONTIERS IN PLANT SCIENCE 2017; 8:1215. [PMID: 28751902 PMCID: PMC5508026 DOI: 10.3389/fpls.2017.01215] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 06/27/2017] [Indexed: 05/14/2023]
Abstract
A novel Salicornia brachiata Salt Inducible (SbSI-1) gene was isolated and overexpressed in tobacco for in planta functional validation subjected to drought and salt stress. SbSI-1 is a nuclear protein. The transgenic tobacco overexpressing SbSI-1 gene exhibited better seed germination, growth performances, pigment contents, cell viability, starch accumulation, and tolerance index under drought and salt stress. Overexpression of SbSI-1 gene alleviated the build-up of reactive oxygen species (ROS) and curtailed the ROS-induced oxidative damages thus improved the physiological health of transgenic tobacco under stressed conditions. The higher activities of antioxidant enzymes, lower accumulation of ROS, higher membrane stability, relative water content, and polyphenol contents indicated the better survival of the transgenic tobacco than wild-type (WT) tobacco under stressed conditions. Transgenic tobacco had a higher net photosynthetic rate, PSII operating efficiency, and performance index under drought and salt stress. Higher accumulation of compatible solutes and K+/Na+ ratio in transgenic tobacco than WT showed the better osmotic and redox homeostasis under stressed conditions. The up-regulation of genes encoding antioxidant enzymes (NtSOD, NtAPX, and NtCAT) and transcription factors (NtDREB2 and NtAP2) in transgenic tobacco under stressed conditions showed the role of SbSI-1 in ROS alleviation and involvement of this gene in abiotic stress tolerance. Multivariate data analysis exhibited statistical distinction among growth responses, physiological health, osmotic adjustment, and photosynthetic responses of WT and transgenic tobacco under stressed conditions. The overexpression of SbSI-1 gene curtailed the ROS-induced oxidative damages and maintained the osmotic homeostasis under stress conditions thus improved physiological health and photosynthetic efficiencies of the transgenic tobacco overexpressing SbSI-1 gene.
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Affiliation(s)
- Jyoti Kumari
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
- Academy of Scientific and Innovative Research, Council of Scientific and Industrial ResearchNew Delhi, India
| | - Pushpika Udawat
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
- Academy of Scientific and Innovative Research, Council of Scientific and Industrial ResearchNew Delhi, India
| | - Ashish K. Dubey
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
| | - Md Intesaful Haque
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
| | - Mangal S. Rathore
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
- Academy of Scientific and Innovative Research, Council of Scientific and Industrial ResearchNew Delhi, India
- *Correspondence: Mangal S. Rathore ;
| | - Bhavanath Jha
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial ResearchBhavnagar, India
- Academy of Scientific and Innovative Research, Council of Scientific and Industrial ResearchNew Delhi, India
- Bhavanath Jha
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Swapnil P, Singh M, Singh S, Sharma NK, Rai AK. Recombinant glycinebetaine improves metabolic activities, ionic balance and salt tolerance in diazotrophic freshwater cyanobacteria. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.06.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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