Genotypic Diversity of Cross-Tolerance to Oxidative and Drought Stresses in Rice Seedlings Evaluated by the Maximum Quantum Yield of Photosystem II and Membrane Stability

Iseki, Kazuo; Homma, Koki; Endo, Tamao; Shiraiwa, Tatsuhiko

doi:10.1626/pps.16.295

Cited by 14 publications

(12 citation statements)

References 43 publications

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“…The results obtained in the present study support the previous observations, which clearly demonstrate negative effects of salinity and drought stress on Fv/Fm ratio. The decline in Fv/Fm values can be corroborated to oxidative damages induced by drought and salt stresses (Iseki et al ). However, PGPR treatments under stress conditions enhance Fv/Fm values as compared to uninoculated stressed seedlings suggesting a role for these PGPR strains in restoring optimal photosynthesis.…”

Section: Discussionmentioning

confidence: 94%

Plant growth‐promoting rhizobacteria enhance wheat salt and drought stress tolerance by altering endogenous phytohormone levels and TaCTR1/TaDREB2 expression

Barnawal

Bharti

Pandey

et al. 2017

Physiologia Plantarum

335

134

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Abiotic stresses such as salt and drought represent adverse environmental conditions that significantly damage plant growth and agricultural productivity. In this study, the mechanism of the plant growth-promoting rhizo-bacteria (PGPR)-stimulated tolerance against abiotic stresses has been explored. Results suggest that PGPR strains, Arthrobacter protophormiae (SA3) and Dietzia natronolimnaea (STR1), can facilitate salt stress tolerance in wheat crop, while Bacillus subtilis (LDR2) can provide tolerance against drought stress in wheat. These PGPR strains enhance photosynthetic efficiency under salt and drought stress conditions. Moreover, all three PGPR strains increase indole-3-acetic acid (IAA) content of wheat under salt and drought stress conditions. The SA3 and LDR2 inoculations counteracted the increase of abscisic acid (ABA) and 1-aminocyclopropane-1-carboxylate (ACC) under both salt and drought stress conditions, whereas STR1 had no significant impact on the ABA and ACC content. The impact of PGPR inoculations on these physiological parameters were further confirmed by gene expression analysis as we observed enhanced levels of the TaCTR1 gene in SA3-, STR1- and LDR2-treated wheat seedlings as compared to uninoculated drought and salt stressed plants. PGPR inoculations enhanced expression of TaDREB2 gene encoding for a transcription factor, which has been shown to be important for improving the tolerance of plants to abiotic stress conditions. Our study suggest that PGPR confer abiotic stress tolerance in wheat by enhancing IAA content, reducing ABA/ACC content, modulating expression of a regulatory component (CTR1) of ethylene signaling pathway and DREB2 transcription factor.

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Section: Discussionmentioning

confidence: 94%

Plant growth‐promoting rhizobacteria enhance wheat salt and drought stress tolerance by altering endogenous phytohormone levels and TaCTR1/TaDREB2 expression

Barnawal

Bharti

Pandey

et al. 2017

Physiologia Plantarum

335

134

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“…Cross-tolerance is defined as the phenomenon by which a plant resistance to a stress induces resistance to another (Genoud and Metraux 1999). Because much of the injuries they induce in plants are associated with oxidative damage at the cellular level, oxidative stress tolerance is thought to play a key role in cross-tolerance to a variety of environmental stresses (Iseki et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Cross-tolerance to abiotic stresses in halophytes: application for phytoremediation of organic pollutants

et al. 2015

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Halopytes are plants able to tolerate high salt concentrations but no clear definition was retained for them. In literature, there are more studies that showed salt-enhanced tolerance to other abiotic stresses compared to investigations that found enhanced salt tolerance by other abiotic stresses in halophytes. The phenomenon by which a plant resistance to a stress induces resistance to another is referred to as cross-tolerance. In this work, we reviewed cross-tolerance in halophytes at the physiological, biochemical, and molecular levels. A special attention was accorded to the cross-tolerance between salinity and organic pollutants that could allow halophytes a higher potential of xenobiotic phytoremediation in comparison with glycophytes.

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“…In our previous study, we developed a method to evaluate cross-tolerance in seedlings belonging to a rice diversity germplasm research set (RDRS) (Iseki et al, 2013a). The tolerance of the seedlings to oxidative stress and to drought stress was evaluated with measurements of the maximum quantum yield of photosystem II (F v /F m , a parameter of chlorophyll fluorescence) and of the membrane stability index (MSI) under both oxidative stress and drought stress.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this study is to clarify the effects of cross-tolerance on rice dry matter production under aerobic conditions, and to validate the cross-tolerance as a selection criterion. For the purpose, the cross-tolerance to oxidative stress and drought stress was evaluated according to the PCS1 by the methods described in Iseki et al (2013a). The evaluation was conducted for 91 breeding populations in order to estimate genotypic variation in the cross-tolerance.…”

Section: Introductionmentioning

confidence: 99%

The effects of cross-tolerance to oxidative stress and drought stress on rice dry matter production under aerobic conditions

Iseki

Homma

Shiraiwa

et al. 2014

Field Crops Research

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Oxidative damage occurring in plant cells under drought stress is a known cause of reduced plant primary production. Decreasing oxidative damage through oxidative stress tolerance is expected to confer drought stress tolerance. In this study, we estimated cross-tolerance to oxidative stress and drought stress for breeding populations and analyzed the effects of the cross-tolerance on dry matter production in field experiments. For a total of 91 rice genotypes, including 72 backcross lines (BCLs), cross-tolerance was estimated from the first principal component score (PCS1) derived from a principal component analysis using a data set with a parameter of chlorophyll fluorescence and cell membrane stability index in both the oxidative and the drought stress treatments as the factors. Generally, the values of PCS1 were segregated in the BCLs, suggesting that cross-tolerance is a heritable trait that can be improved by crossbreeding. The effects of positive and negative PCS1 on dry matter production under flooded and aerobic conditions were tested in field experiments. The decrease in dry matter production under aerobic conditions was smaller for the positive-PCS1 genotypes. However, these genotypes also showed a lower stomatal conductance and smaller shoot biomass, especially under flooded conditions. We concluded that cross-tolerance is a useful trait for improving dry matter production, especially under severe drought stress. In view of the trade-offs between cross-tolerance and dry matter production, it is important to develop rice varieties with an optimal level of cross-tolerance for a target environment characterized by drought stress.

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Genotypic Diversity of Cross-Tolerance to Oxidative and Drought Stresses in Rice Seedlings Evaluated by the Maximum Quantum Yield of Photosystem II and Membrane Stability

Cited by 14 publications

References 43 publications

Plant growth‐promoting rhizobacteria enhance wheat salt and drought stress tolerance by altering endogenous phytohormone levels and TaCTR1/TaDREB2 expression

Plant growth‐promoting rhizobacteria enhance wheat salt and drought stress tolerance by altering endogenous phytohormone levels and TaCTR1/TaDREB2 expression

Cross-tolerance to abiotic stresses in halophytes: application for phytoremediation of organic pollutants

The effects of cross-tolerance to oxidative stress and drought stress on rice dry matter production under aerobic conditions

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