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Zhang H, Wu Y, Zhang H, Sun N, Zhang H, Tian B, Zhang T, Wang K, Nan X, Zhang H. AtMYB72 aggravates photosynthetic inhibition and oxidative damage in Arabidopsis thaliana leaves caused by salt stress. PLANT SIGNALING & BEHAVIOR 2024; 19:2371694. [PMID: 38916149 PMCID: PMC11204036 DOI: 10.1080/15592324.2024.2371694] [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: 04/12/2024] [Accepted: 05/24/2024] [Indexed: 06/26/2024]
Abstract
MYB transcription factor is one of the largest families in plants. There are more and more studies on plants responding to abiotic stress through MYB transcription factors, but the mechanism of some family members responding to salt stress is unclear. In this study, physiological and transcriptome techniques were used to analyze the effects of the R2R3-MYB transcription factor AtMYB72 on the growth and development, physiological function, and key gene response of Arabidopsis thaliana. Phenotypic observation showed that the damage of overexpression strain was more serious than that of Col-0 after salt treatment, while the mutant strain showed less salt injury symptoms. Under salt stress, the decrease of chlorophyll content, the degree of photoinhibition of photosystem II (PSII) and photosystem I (PSI) and the degree of oxidative damage of overexpressed lines were significantly higher than those of Col-0. Transcriptome data showed that the number of differentially expressed genes (DEGs) induced by salt stress in overexpressed lines was significantly higher than that in Col-0. GO enrichment analysis showed that the response of AtMYB72 to salt stress was mainly by affecting gene expression in cell wall ectoplast, photosystem I and photosystem II, and other biological processes related to photosynthesis. Compared with Col-0, the overexpression of AtMYB72 under salt stress further inhibited the synthesis of chlorophyll a (Chla) and down-regulated most of the genes related to photosynthesis, which made the photosynthetic system more sensitive to salt stress. AtMYB72 also caused the outbreak of reactive oxygen species and the accumulation of malondialdehyde under salt stress, which decreased the activity and gene expression of key enzymes in SOD, POD, and AsA-GSH cycle, thus destroying the ability of antioxidant system to maintain redox balance. AtMYB72 negatively regulates the accumulation of osmotic regulatory substances such as soluble sugar (SS) and soluble protein (SP) in A. thaliana leaves under salt stress, which enhances the sensitivity of Arabidopsis leaves to salt. To sum up, MYB72 negatively regulates the salt tolerance of A. thaliana by destroying the light energy capture, electron transport, and antioxidant capacity of Arabidopsis.
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Affiliation(s)
- Hongrui Zhang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Yinuo Wu
- Aulin College, Northeast Forestry University, Harbin, China
| | - Hongbo Zhang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Nan Sun
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Hongjiao Zhang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Bei Tian
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Tanhang Zhang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Kexin Wang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Xu Nan
- Key Laboratory of Heilongjiang Province for Cold-Regions Wetlands Ecology and Environment Research, Harbin University, School of Geography and Tourism, Harbin, China
| | - Huiui Zhang
- College of Life Sciences, Northeast Forestry University, Harbin, China
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Corrêa V, Gonçalves J, Costa K, Oliveira I, Santos J, Oliveira S, Ferreira M, Lima R, Araújo W, Nunes-Nesi A. The Role of Phosphate Fertilization on Physiological Responses of the Young Bertholletia excelsa Plants Grown in a P-Deficient Amazon Ferralsol. PLANTS (BASEL, SWITZERLAND) 2022; 11:2955. [PMID: 36365407 PMCID: PMC9657814 DOI: 10.3390/plants11212955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/24/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
Phosphorus (P) reacts with soil minerals, which makes it less available to plants. Considering that Amazonian soils have a low pH and nutrient availability, both of these properties contribute to an increase in P limitation. Here, we investigate how the addition of P to the substrate affects morpho-physiological traits of Brazil nut trees (Bertholletia excelsa Bonpl.). The experiment was carried out in a greenhouse with 24-month-old saplings, and the P treatments consisted of a control (Ferrasol without P addition) and 100, 200, 400, and 500 mg P kg-1 of added to the soil. When B. excelsa saplings were fertilized with phosphate, the N:P leaf ratio reduced from 50 to 26. Addition of P favored the photochemical efficiency of PSII (FV/FM), and the application of 200 mg kg-1 increased photosynthesis (PN) by 50%. Furthermore, phosphorus enhanced light and nutrient use efficiency. An increase in B. excelsa dry biomass was observed when 200 mg P kg-1 was added, with maximum yield occurring at 306.2 mg P kg-1. Physiological parameters suggest robust responses by B. excelsa to P fertilization. In addition, our findings reveal the critical role of P on B. excelsa growth in Ferralsol, as well as the potential of P fertilization to improve functional traits of this important Amazonian tree.
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Affiliation(s)
- Viviane Corrêa
- Federal Institute of Education, Science and Technology (IFRO), Rua Rio Amazonas, 151, Jardim dos Migrantes, Ji-Paraná 76900-310, RO, Brazil
| | - José Gonçalves
- Laboratory of Plant Physiology and Biochemistry, National Institute for Amazonian Research (MCTI-INPA), Avenida André Araújo, 2936, Aleixo, Manaus 69011-970, AM, Brazil
| | - Karen Costa
- Faculty of Agricultural Sciences, Institute of Studies in Agrarian and Regional Development (IEDAR), Federal University of South and Southeast of Pará (UNIFESSPA), Rodovia BR-230 (Transamazônica), Cidade Jardim, Marabá 68500-000, PA, Brazil
| | - Igor Oliveira
- Bionorte Graduate Program (BIONORTE), Amazonas State University, Rua Carvalho Leal A, 1777, Bairro Cachoeirinha, Manaus 69065-001, AM, Brazil
| | - José Santos
- Faculty of Agricultural Sciences, Federal University of Amazonas (UFAM), Avenida General Rodrigo Octavio Jordão Ramos, 1200, Coroado I, Manaus 69067-005, AM, Brazil
| | - Sabrina Oliveira
- Laboratory of Plant Physiology and Biochemistry, National Institute for Amazonian Research (MCTI-INPA), Avenida André Araújo, 2936, Aleixo, Manaus 69011-970, AM, Brazil
| | - Marciel Ferreira
- Faculty of Agricultural Sciences, Federal University of Amazonas (UFAM), Avenida General Rodrigo Octavio Jordão Ramos, 1200, Coroado I, Manaus 69067-005, AM, Brazil
| | - Roberval Lima
- Embrapa Western Amazon, Research and Development, Rodovia AM 010, km 29, Manaus 69010-970, AM, Brazil
| | - Wagner Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, Viçosa 36570-900, MG, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, Viçosa 36570-900, MG, Brazil
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Ansari HH, Siddiqui A, Wajid D, Tabassum S, Umar M, Siddiqui ZS. Profiling of energy compartmentalization in photosystem II (PSII), light harvesting complexes and specific energy fluxes of primed maize cultivar (P1429) under salt stress environment. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 170:296-306. [PMID: 34952249 DOI: 10.1016/j.plaphy.2021.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/25/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Photosystem II efficiency is the most important aspect of stress physiology to keep photosynthetic momentum operative under stress conditions. In the last few decades effect of priming on the germination growth and physiology of plants were highlighted. Profiling energy compartmentalization in PSII using chlorophyll fluorescence kinetics and specific energy fluxes of primed seeds and plants has not been documented. It is crucial to discover the changes associated with the light-harvesting complexes, PSII functionality, and photochemical modulations occurring in the biochemical thylakoid membrane in response to priming and salt stress. The present study mainly focuses on photosystem II efficiency leading to physiological tolerance by seed priming. We grow the plants after seed priming with the solution of sodium chloride (75 and 150 mM), salicylic acid (1 and 2 mM), and calcium chloride (34 mM) and nitrate (20 mM). All the primed plants were subjected to salt stress 10 days after germination @ 0, 75, and 150 mM NaCl. Later germination, growth, morphology, physiology, PS II functionality and photochemical yield were evaluated. NaCl priming did more promising effects on energy compartmentalization, light-harvesting ability, and specific energy fluxes of photosystem II compared to salicylic acid and calcium salts under a stress environment. Maximum quantum yield (FV/FM), active reaction centers with higher efficiency of water splitting complex (FV/FO), restored electron flow, higher photochemical quenching (qP), oxygen evolution (SMT-phase), and almost negligible heat dissipation are associated with better osmotic adjustment and higher water uptake (RWC) under stress condition.
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Affiliation(s)
- Hafiza Hamna Ansari
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan
| | - Aeman Siddiqui
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan
| | - Danish Wajid
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan
| | - Shehla Tabassum
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan
| | - Muhammad Umar
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan
| | - Zamin Shaheed Siddiqui
- Stress Physiology and Phenomic Center, Department of Botany, University of Karachi, Pakistan.
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