Photosynthetic, antioxidant activities, and osmoregulatory responses in winter wheat differ during the stress and recovery periods under heat, drought, and combined stress

Ru, Chen; Hu, Xiaotao; Chen, Dianyu; Wang, Wenè; Zhen, Jingbo

doi:10.1016/j.plantsci.2022.111557

Cited by 31 publications

(29 citation statements)

References 61 publications

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“…The drop in spike fertility and other yield traits under hot and dry conditions is strongly related to physiological and biochemical perturbations occurring in stressed plants. As in practically all green plants, photosynthetic efficiency is highly reduced in wheat subjected to high temperatures and water limitations, due to accelerated leaf senescence, which restricts green-photosynthetic areas, as well as to disruption of chloroplasts’ structure and function, implying reduction of pigments such as chlorophyll and carotenoids, inactivation of key enzymes and membrane injury (e.g., [ 38 ] and references therein). Hence, chlorophyll fluorescence analysis, which enables the assessment of several parameters related to photosynthetic efficiency, is a commonly used tool to monitor the physiological status of plants under abiotic stress conditions [ 39 , 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

The Response of Chromosomally Engineered Durum Wheat-Thinopyrum ponticum Recombinant Lines to the Application of Heat and Water-Deficit Stresses: Effects on Physiological, Biochemical and Yield-Related Traits

Giovenali

Kuzmanović

Capoccioni

et al. 2023

Plants

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Abiotic stress occurrence and magnitude are alarmingly intensifying worldwide. In the Mediterranean basin, heat waves and precipitation scarcity heavily affect major crops such as durum wheat (DW). In the search for tolerant genotypes, the identification of genes/QTL in wild wheat relatives, naturally adapted to harsh environments, represents a useful strategy. We tested three DW-Thinopyrum ponticum recombinant lines (R5+, R112+, R23+), their control sibs lacking any alien introgression, and the heat-tolerant cv. Margherita for their physiological, biochemical and yield response to heat stress (HS) application at anthesis, also in combination with water-deficit stress applied from booting until maturity. Under HS, R5+ and R112+ (23%- and 28%-long 7el1L Th. ponticum chromosome segment distally inserted on DW 7AL, respectively) showed remarkable stability of the yield-related traits; in turn, R23+ (40%-long 7el1L segment), despite a decreased grain yield, exhibited a greater spike fertility index and proline content in spike than its control sib. Under water-deficit + HS, R5+ showed the highest increment in water use efficiency and in flag leaf proline content, accompanied by the lowest yield penalty even vs. Margherita. This research confirms the value of harnessing wild gene pools to enhance DW stress tolerance and represents a starting point for elucidating the mechanisms of Thinopyrum spp. contribution to this relevant breeding target.

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Section: Introductionmentioning

confidence: 99%

The Response of Chromosomally Engineered Durum Wheat-Thinopyrum ponticum Recombinant Lines to the Application of Heat and Water-Deficit Stresses: Effects on Physiological, Biochemical and Yield-Related Traits

Giovenali

Kuzmanović

Capoccioni

et al. 2023

Plants

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“…In general, photosynthesis in wheat plants can recover within a few days after the removal of stress factors such as drought and flooding (Dessislava et al, 2022; Ru et al, 2023). However, in this study, the photosynthetic performance did not fully recover on the 16th day for all water treatments and cultivars compared to the 8th day (Figures 2, 3, S1).…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic adaptation mechanisms of waterlogged wheat (Triticum aestivum) at flowering under exogenous nitric oxide donor application

Yang,

Ou,

Zhang

et al. 2024

Physiologia Plantarum

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The effects of nitric oxide (NO) on the photosynthetic adaptation mechanisms of wheat plants in waterlogging during the flowering stage are poorly understood. Field and pot experiments using two cultivars were conducted with three treatments: waterlogging (WL), waterlogging plus NO donor sodium nitroprusside (WLsnp), and adequate water (CK). The results indicated that the WLsnp and CK treatments exhibited significantly higher 1000‐kernel weight and yield than the WL treatment because of high photosynthetic potential(P<0.05). We found that the photosynthetic performance, including photosynthetic rate (Pn), stomatal conductance (gs), mesophyll conductance (gm), carbon dioxide concentration at the carboxylation site (Cc), maximum carboxylation rate (Vcmax), maximum electron transfer rate (Jmax), actual electron transfer rate (J), actual PSII efficiency (ΦPSII) and potential maximum efficiency in PSII (Fv/Fm), was significantly improved in the WLsnp treatment compared to the WL treatment, both during waterlogging and after de‐waterlogging. Little difference was observed in the photosynthetic performance between the WLsnp and CK treatments during waterlogging for cultivar YM15 and after de‐waterlogging for cultivar YM24. Further analysis indicated that gs, gm and J were identified as key physiological indicators that synergistically regulate Pn of waterlogged wheat plants. Overall, the improvement of wheat's waterlogging resistance capacity after spraying NO is mainly related to high gs, great gm, and high J.

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“…However, plants under heat and drought stress activate antioxidant detoxification systems to mitigate oxidative stress. Antioxidant enzymes mainly include superoxide dismutase, peroxidase, catalase, and ascorbic acid peroxidase (Dumanović et al, 2021; Ru et al, 2023). Another important biochemical response to drought is osmoregulation, such as the accumulation of proline, sucrose, and glycine betaine (GB), which can maintain biomolecule structural and physiological functions by buffering cellular redox potential (Niazian et al, 2021; Ru et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Wheat provides a source of nutrients for over one‐third of the global population (Hao et al, 2022). Unfortunately, wheat plants are sensitive to terminal drought, which often occurs simultaneously with high temperatures (Zhao et al, 2022; Ru et al, 2023). Compared with single stresses, combined stress exacerbates oxidative damage to plants, causing greater disruption of physiological functions and ultimately leading to low productivity (Ahluwalia et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Antioxidant enzymes mainly include superoxide dismutase, peroxidase, catalase, and ascorbic acid peroxidase (Dumanović et al, 2021; Ru et al, 2023). Another important biochemical response to drought is osmoregulation, such as the accumulation of proline, sucrose, and glycine betaine (GB), which can maintain biomolecule structural and physiological functions by buffering cellular redox potential (Niazian et al, 2021; Ru et al, 2023). Research has shown that the antioxidant defence system of plants may fail to effectively remove the overproduced ROS under severe heat and drought conditions, which seriously damages membrane structure and cell function, leading to cell death (Awasthi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen mitigates the negative effects of combined heat and drought stress on winter wheat by improving physiological characteristics

Ru,

Hu,

Wang

2024

Physiologia Plantarum

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Extreme drought stress is often accompanied by heat stress after anthesis in winter wheat. Whether nitrogen (N) can mitigate the damage caused by combined stress on wheat plants by regulating root physiological characteristics is still unclear. Thus, this study aimed to study the effects of combined heat and drought stress on photosynthesis, leaf water relations, root antioxidant system, osmoregulatory, and yield in wheat to reveal the physiological mechanism of N regulating the adverse impacts of combined stress on wheat. Heat and drought stress markedly reduced photosynthesis, leaf water content, root vitality, and bleeding sap. The combination of heat and drought strengthens these changes. Within a certain stress range, the increase in soluble sugar and proline contents and the activities of superoxide dismutase, peroxidase, catalase, and ascorbate peroxidase under combined stress effectively alleviated the oxidative damage. Compared with those under high N application (N3), wheat plants under low N application (N1) maintained higher yield and yield components under combined stress; the number of grains per spike, 1000‐grain weight, and yield increased by 13.65%, 9.07%, and 15.33%, respectively, under N1 compared with those under N3 treatment, which may be attributed to the greater maintenance of photosynthesis, leaf water status, root vitality, and antioxidant and osmoregulation capacities. In summary, reduced N application mitigated the damage caused by combined heat and drought stress in wheat by improving root physiological characteristics and enhanced adaptability to combined stress, which is an appropriate strategy to compensate for yield losses.

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Photosynthetic, antioxidant activities, and osmoregulatory responses in winter wheat differ during the stress and recovery periods under heat, drought, and combined stress

Cited by 31 publications

References 61 publications

The Response of Chromosomally Engineered Durum Wheat-Thinopyrum ponticum Recombinant Lines to the Application of Heat and Water-Deficit Stresses: Effects on Physiological, Biochemical and Yield-Related Traits

The Response of Chromosomally Engineered Durum Wheat-Thinopyrum ponticum Recombinant Lines to the Application of Heat and Water-Deficit Stresses: Effects on Physiological, Biochemical and Yield-Related Traits

Photosynthetic adaptation mechanisms of waterlogged wheat (Triticum aestivum) at flowering under exogenous nitric oxide donor application

Nitrogen mitigates the negative effects of combined heat and drought stress on winter wheat by improving physiological characteristics

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