Antioxidative defence under drought stress in a wheat stay-green mutant

Tian, Fei; Zhang, M.; Wang, X.; Chen, Y. H.; Wang, W.

doi:10.1007/s10535-014-0483-9

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…AMF infection increased the GSH and GSSG content was also reported in previous study in plants (Wu et al 2006). Similar to drought stress, altered ratio of GSH/GSSG has been observed in plants under various stresses (Hefny and Abdel-Kader 2009, Radyuk et al 2009, Maheshwari and Dubey 2009, Tian et al 2015. Eltayeb et al (2011) observed greater protections against oxidative damage imposed by various environment stresses in transgenic potato with higher level of reduced glutathione.…”

Section: Effect Of Drought Stress and Amf On Antioxidative Enzymessupporting

confidence: 82%

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

et al. 2018

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The effect of arbuscular mycorrhizal fungi (AMF) on antioxidative system in drought tolerant (WH 1025) and drought susceptible (WH 1105) wheat varieties was investigated in screen house under control and stress conditions. Mycorrhizal and non-mycorrhizal wheat (Triticum aestivum L.) plants were subjected to water stress by withholding irrigation at different stages of plant growth (i.e. jointing and heading stages). The antioxidant and antioxidative enzymes were estimated in leaves of water stressed and control plants. It was found that drought tolerant and drought susceptible varieties showed different response under drought conditions. Variety WH 1105 suffered greater damage to cellular membrane due to high level of reactive oxygen species (ROS) as indicated by superoxide radical (O.-), hydrogen peroxide (H2O2) and malondialdehyde (MDA) content under stress conditions. Antioxidative enzymes viz. superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT) and peroxidase (POX) were higher in drought tolerant variety. Antioxidative metabolites viz. ascorbic acid and glutathione content was increased in both tolerant and susceptible variety under water stress but with higher magnitude in WH 1025 than WH 1105. Results showed that under water stress conditions, mycorrhizal inoculation significantly decreased the O2 .-, H2O2, and MDA content and enhance the activities of antioxidative enzymes in both the varieties. But it was found that the activity was higher in tolerant variety than susceptible variety under water stress conditions. Hence, overall results suggest that mycorrhizal symbiosis play a vital role in enhancing the activities of antioxidative enzymes and decreasing the ROS content that enables the host plant to sustain the drought conditions.

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Section: Effect Of Drought Stress and Amf On Antioxidative Enzymessupporting

confidence: 82%

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

et al. 2018

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“…In sorghum, stay-green hybrids produced 47% more biomass under terminal drought [ 118 , 119 , 120 ]. A new wheat stay-green mutant tasg1 showed an enhanced antioxidative capacity that leads to a delayed senescence and better drought resistance [ 121 ]. The efficient removal of ROS by the ascorbate-glutathione cycle under limited water conditions might be the key factor for the observed enhanced stress tolerance.…”

Section: Stay Green Traitmentioning

confidence: 99%

Network Candidate Genes in Breeding for Drought Tolerant Crops

Krannich

Maletzki

Kurowsky

et al. 2015

IJMS

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Climate change leading to increased periods of low water availability as well as increasing demands for food in the coming years makes breeding for drought tolerant crops a high priority. Plants have developed diverse strategies and mechanisms to survive drought stress. However, most of these represent drought escape or avoidance strategies like early flowering or low stomatal conductance that are not applicable in breeding for crops with high yields under drought conditions. Even though a great deal of research is ongoing, especially in cereals, in this regard, not all mechanisms involved in drought tolerance are yet understood. The identification of candidate genes for drought tolerance that have a high potential to be used for breeding drought tolerant crops represents a challenge. Breeding for drought tolerant crops has to focus on acceptable yields under water-limited conditions and not on survival. However, as more and more knowledge about the complex networks and the cross talk during drought is available, more options are revealed. In addition, it has to be considered that conditioning a crop for drought tolerance might require the production of metabolites and might cost the plants energy and resources that cannot be used in terms of yield. Recent research indicates that yield penalty exists and efficient breeding for drought tolerant crops with acceptable yields under well-watered and drought conditions might require uncoupling yield penalty from drought tolerance.

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“…Some functional stay-green mutants exhibit enhanced antioxidant capacities (Prochazkova et al 2001), delayed senescence, and prolonged photosynthetic activities (Wang et al 2020). Tian et al (2015) reported that the wheat stay-green mutant tasg1 has a stronger antioxidant capacity than wild-type (WT) plants at the grain-filling stage and under conditions of drought stress. To date, however, there have been few studies that have examined the antioxidant physiology of stay-green soybean, particularly the dynamic expression of antioxidant enzyme isogenes during leaf senescence.…”

Section: Introductionmentioning

confidence: 99%

The Stay-green Mutation Contributes to Enhanced Antioxidative Competence and Delays Leaf Senescence in Soybean Hybrid Z1

Wang¹

2021

IJAB

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The new soybean stay-green variety Jinda Zhilv No. 1 (Z1) was obtained through crossing a stay-green mutant with the super-high yielding soybean cultivar Jinda No. 74 (JD74). Here, we compared the antioxidant enzyme activities and reactive oxygen species content of the Z1 and JD74 varieties under natural and dark-induced senescence. Dark treatment was imposed at the seedling stage for 13 days. Fluorescence quantitative PCR was used to investigate the expression of isozyme genes related to superoxide dismutase (SOD), catalase (CAT) and ascorbate–glutathione cycle. The results indicated that compared with JD74, Z1 exhibited enhanced antioxidant enzyme activity, with rates of hydrogen peroxide and superoxide anion accumulation being lower in Z1 after flowering. The expression levels of antioxidant enzyme isogenes, including Mn-SOD, Chl Cu/Zn-SOD, peroxisome Cu/Zn-SOD, CAT5, MDHAR1, and DHAR3, were higher in Z1 than in JD74 during the seed-filling stage. After 6 days of dark treatment, the membrane system of JD74 leaves showed severe oxidative damage and the leaves had turned completely yellow. These changes were accompanied by reduced contents of chlorophyll and soluble protein after 13 days of dark treatment. In contrast, Z1 was observed to be more tolerant to dark stress. Its internal reactive oxygen metabolism balance remained unimpaired, and the leaves showed no obvious senescence traits. In conclusion, the higher antioxidant capacity in Z1 contributes to delayed leaf senescence, which is a significant finding with respect to the application of stay-green mutants in soybean breeding and germplasm innovation. © 2021 Friends Science Publishers

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Antioxidative defence under drought stress in a wheat stay-green mutant

Cited by 6 publications

References 29 publications

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

Network Candidate Genes in Breeding for Drought Tolerant Crops

The Stay-green Mutation Contributes to Enhanced Antioxidative Competence and Delays Leaf Senescence in Soybean Hybrid Z1

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