Influence of lowered temperature on the resistance and functional activity of the photosynthetic apparatus of wheat plants

Venzhik, Yu. V.; Титов, А. Ф.; Таланова, В. В.; Frolova, S. A.; Talanov, A. V.; Nazarkina, Ye. A.

doi:10.1134/s1062359011020142

Cited by 20 publications

(10 citation statements)

References 13 publications

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“…Longer lateral roots accelerate nutrient consumption and are more susceptible to freezing under low-temperature stress ( Schwab et al, 1996 ; Withington et al, 2006 ). Studies have confirmed that low-temperature stress inhibits plant growth ( Liu et al, 2019 ; Venzhik et al, 2011 ), but little is known about how these characteristics affect cold resistance. The above analysis demonstrates the regulatory effect of rainfall events on root system traits, and the next step is to manipulate these traits to enhance plant stress tolerance.…”

Section: Discussionmentioning

confidence: 99%

Plastic response of Medicago sativa L. root system traits and cold resistance to simulated rainfall events

Wan

et al. 2021

PeerJ

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Climate change (rainfall events and global warming) affects the survival of alfalfa (Medicago sativa L.) in winter. Appropriate water management can quickly reduce the mortality of alfalfa during winter. To determine how changes in water affect the cold resistance of alfalfa, we explored the root system traits under different rainfall events and the effects on cold resistance in three alfalfa cultivars. These were exposed to three simulated rainfall events (SRE) × two phases in a randomized complete block design with six replications. The three cultivars were WL168, WL353 and WL440, and the three SRE were irrigation once every second day (D2), every four days (D4) and every eight days (D8). There were two phases: before cold acclimation and after cold acclimation. Our results demonstrated that a period of exposure to low temperature was required for alfalfa to achieve maximum cold resistance. The root system tended toward herringbone branching under D8, compared with D2 and D4, and demonstrated greater root biomass, crown diameter, root volume, average link length and topological index. Nevertheless, D8 had less lateral root length, root surface area, specific root length, root forks and fractal dimensions. Greater root biomass and topological index were beneficial to cold resistance in alfalfa, while more lateral roots and root forks inhibited its ability to survive winter. Alfalfa roots had higher proline, soluble sugar and starch content in D8 than in D2 and D4. In contrast, there was lower malondialdehyde in D8, indicating that alfalfa had better cold resistance following a longer irrigation interval before winter. After examining root biomass, root system traits and physiological indexes we concluded that WL168 exhibited stronger cold resistance. Our results contribute to greater understanding of root and cold stress, consequently providing references for selection of cultivars and field water management to improve cold resistance of alfalfa in the context of changes in rainfall patterns.

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Section: Discussionmentioning

confidence: 99%

Plastic response of Medicago sativa L. root system traits and cold resistance to simulated rainfall events

Wan

et al. 2021

PeerJ

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“…Similarly, in another investigation, when wheat seedlings are subjected to low temperature (4 • C) in a closed chamber for 7 days, an 18% decrease in photosynthetic activity has been recorded after 5 h. Over-excitation of photosystem II has been observed under cold stress, which triggers energy dissipation through non-radiative reactions (Cvetkovic et al, 2017). The maximum efficiency of Photosystem II decreased by 18% after 1 day exposure to cold (Venzhik et al, 2011). Further, photosynthetic activity in cold-sensitive cultivars is more sensitive to cold stress than cold-tolerant cultivars (Yamori et al, 2009).…”

Section: Photosynthesismentioning

confidence: 79%

Cold Stress in Wheat: Plant Acclimation Responses and Management Strategies

et al. 2021

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Unpredicted variability in temperature is associated with frequent extreme low-temperature events. Wheat is a leading crop in fulfilling global food requirements. Climate-driven temperature extremes influence the vegetative and reproductive growth of wheat, followed by a decrease in yield. This review describes how low temperature induces a series of modifications in the morphophysiological, biochemical, and molecular makeup of wheat and how it is perceived. To cope with these modifications, crop plants turn on their cold-tolerance mechanisms, characterized by accumulating soluble carbohydrates, signaling molecules, and cold tolerance gene expressions. The review also discusses the integrated management approaches to enhance the performance of wheat plants against cold stress. In this review, we propose strategies for improving the adaptive capacity of wheat besides alleviating risks of cold anticipated with climate change.

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“…It is highly vulnerable to low-temperature stress [40]. Chloroplast structure, photosynthetic pigment, photosynthetic rate and photosystem II activity are severely reduced under low-temperature stress [13,41]. Poor photosynthesis reduces dry matter accumulation and transportation, halting the final wheat yield [11].…”

Section: Discussionmentioning

confidence: 99%

Optimized Phosphorus Application Alleviated Adverse Effects of Short-Term Low-Temperature Stress in Winter Wheat by Enhancing Photosynthesis and Improved Accumulation and Partitioning of Dry Matter

Sun

et al. 2022

Agronomy

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Low-temperature stress has become an important abiotic factor affecting high and stable wheat production. Therefore, it is necessary to take appropriate measures to enhance low-temperature tolerance in wheat. A pot experiment was carried out using Yannong19 (YN19, a cold-tolerant cultivar) and Xinmai26 (XM26, a cold-sensitive cultivar). We employed traditional phosphorus application (TPA, i.e., R1) and optimized phosphorus application (OPA, i.e., R2) methods. Plants undertook chilling (T1 at 4 °C) and freezing treatment (T2 at −4 °C) as well as ambient temperature (CK at 11 °C) during the anther differentiation period to investigate the effects of OPA and TPA on photosynthetic parameters and the accumulation and distribution of dry matter. The net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) of flag leaves decreased in low-temperature treatments, whereas intercellular carbon dioxide concentration (Ci) increased. Compared with R1CK, Pn in R1T1 and R1T2 treatments was reduced by 26.8% and 42.2% in YN19 and 34.2% and 54.7% in XM26, respectively. In contrast, it increased by 6.5%, 8.9% and 12.7% in YN19 and 7.7%, 15.6% and 22.6% in XM26 for R2CK, R2T1 and R2T2 treatments, respectively, under OPA compared with TPA at the same temperature treatments. Moreover, low-temperature stress reduced dry matter accumulation at the reproductive growth stage. OPA increased dry matter accumulation of vegetative organs after the flowering stage and promoted the transportation of assimilates to grains. Hence, the grain number per spike (GNPS), 1000-grain weight (TGW) and yield per plant (YPP) increased. The low-temperature treatments of T1 and T2 caused yield losses of 24.1~64.1%, and the yield increased by 8.6~20.5% under OPA treatments among the two wheat cultivars. In brief, OPA enhances low-temperature tolerance in wheat, effectively improves wheat architecture and photosynthesis, increases GNPS and TGW and ultimately lessens yield losses.

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Influence of lowered temperature on the resistance and functional activity of the photosynthetic apparatus of wheat plants

Cited by 20 publications

References 13 publications

Plastic response of Medicago sativa L. root system traits and cold resistance to simulated rainfall events

Plastic response of Medicago sativa L. root system traits and cold resistance to simulated rainfall events

Cold Stress in Wheat: Plant Acclimation Responses and Management Strategies

Optimized Phosphorus Application Alleviated Adverse Effects of Short-Term Low-Temperature Stress in Winter Wheat by Enhancing Photosynthesis and Improved Accumulation and Partitioning of Dry Matter

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