Heat Stress Is More Damaging to Superior Spikelets than Inferiors of Rice (Oryza sativa L.) due to Their Different Organ Temperatures

Fu, Guanfu; Feng, Bo; Zhang, Caixia; Yang, Yongjie; Yang, Xueqin; Chen, Tingting; Zhao, Xia; Zhang, Xiufu; Jin, Qing; Tao, Longxing

doi:10.3389/fpls.2016.01637

Cited by 60 publications

(62 citation statements)

References 59 publications

(82 reference statements)

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“…High temperature increases the rate of seed filling, but the increase in the seed filling did not compensate for the loss in the grain filling duration [39]. Our results indicated variable response of the studied cultivars to heat stress across all traits under different environmental conditions which agrees with previous studies [40,59]. Moreover, the high temperature increased stem and leaf rust prevalence and severity during flowering stage under the late sown condition.…”

Section: Discussionsupporting

confidence: 86%

“…Wheat is a cool season crop that found to be sensitive to heat stress during the reproductive stage [37]. Heat stress tolerance is a complicated process controlled by several small effect genes or QTLs and is often confounded by differences in plant morphology and physiology under different environments [38][39][40]. Thus, to understand the complexity of plant responses to heat stress, it is vital to account for the morphological, physiological, and genetic basis of this response under the field conditions.…”

Section: Discussionmentioning

confidence: 99%

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Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Elbasyoni

2018

Agronomy

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Egypt, the fifteenth most populated country and the largest wheat importer worldwide, is vulnerable to global warming. Ten of the commercial and widely grown wheat cultivars were planted in two locations, i.e., Elbostan and Elkhazan for three successive seasons 2014/2015, 2015/2016, and 2016/2017 under two sowing dates (recommended and late). Elbostan and Elkhazan are the two locations used in this study because they represent newly reclaimed sandy soil and the Nile delta soil (clay), respectively. A split-plot, with main plots arranged as a randomized complete block design and three replicates, was used. The overall objective of this study was to identify the ideal cultivar for recommended conditions and heat stressed conditions. The results revealed that heat stress had a significant adverse impact on all traits while it raised the prevalence and severity of leaf and stem rust which contributed to overall yield losses of about 40%. Stability measurements, the additive main effects and multiplicative interaction model (AMMI) and genotype main effect plus genotype × environment interaction (GGE), were useful to determine the ideal genotypes for recommended and late sowing conditions (heat stressed). However, inconsistency was observed among some of these measurements. Cultivar "Sids12" was stable and outperformed other tested cultivars under combined sowing dates across environments. However, cultivar "Gemmeiza9" was more stable and outperformed other cultivars across environments under the recommended sowing date. Moreover, cultivar "Gemmeiza12" was the ideal cultivar for the late sown condition. Based on our findings, importing and evaluating heat stress tolerant wheat genotypes under late sown conditions or heat stressed conditions in Egypt is required to boost heat stress tolerance in the adapted wheat cultivars.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Elbasyoni

2018

Agronomy

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“…Due to decrease in the activation state of RUBISCO coupled with relative increase in oxygenase property of the enzyme, P N and g s showed inhibition under HT stress (Morales et al, 2003;. In the present study, we found drastic reduction in P N , Maintenance of cooler canopy temperature (low CT and CTD) is often thought as a mechanism to maintain better water status and escape heat stress as reported in other crop species (Fu et al, 2016;Rebetzke, Rattey, Farquhar, Richards, & Condon, 2013).…”

Section: Discussionsupporting

confidence: 70%

“…Due to maintenance of highest transpiration rate by ICGS 44 in D 3 condition, it could significantly cool down its canopy (as evident from lower CT and CTD data) and maintain a favourable metabolic status inside the leaf tissue under HT stress. Maintenance of cooler canopy temperature (low CT and CTD) is often thought as a mechanism to maintain better water status and escape heat stress as reported in other crop species (Fu et al., ; Rebetzke, Rattey, Farquhar, Richards, & Condon, ).…”

Section: Discussionmentioning

confidence: 98%

Rapid induction of small heat shock proteins improves physiological adaptation to high temperature stress in peanut

Chakraborty

Bishi

Singh

et al. 2018

J Agronomy Crop Science

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With the changing climatic scenario and increasing global mean temperature, heat stress became a major limiting factor for today's agriculture. To identify the underlying mechanism associated with heat tolerance in peanut, two experiments (field and growth chamber) were conducted with four genotypes (ICGS 44, GG 7, AK 159 and DRG 1) having differential high temperature stress sensitivity. Field grown plants under three different temperature (D1, D2 and D3) regimes simulated three temperature treatment effects with a variability of 3–4/4–5°C in mean day/night temperature, respectively. In growth chamber, imposition of heat shock (10°C above ambient inside growth chamber) revealed not only rapid induction (within 0.5 hr) of HSPs, especially small HSPs (HSP 17, HSP 40) in tolerant genotypes, but also its sustenance for longer duration (2 hr), which might help them to have better physiological adaptation strategies under high temperature stress. This was evident from significant advancement in phenophases observed with increase in temperature by 15–18 days at physiological maturity, while pollen viability and membrane stability reduced below 50% and 41%, respectively in DRG 1 with increase in mean day/night temperature. Maintenance of higher photosynthesis and transpiration rate and stomatal conductance helped the tolerant genotype ICGS 44 to keep relatively cooler canopy and higher photosynthates, ensuring better physiological condition in this genotype under heat stress. Significant increase (~2.5‐fold) in inositol and hexoses (glucose and fructose) content and reduction (>50%) in sucrose content in leaf tissues indicated degradation of storage carbohydrates for improved osmotic adjustment especially in tolerant genotypes under elevated temperature.

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“…2A). As well known, antioxidant enzymes including SOD, POD, CAT and APX can be induced by abiotic stress to alleviate the oxidant stress in plants (Ahmad et al 2010;Fu et al 2016;Zhang et al 2016). Interestingly, APX was the only antioxidant responsible for maintaining ROS homeostasis in rice plants under cold stress (Fig.…”

Section: The Function Of Gsh In Conferring Cold Tolerance In Rice Plantsmentioning

confidence: 98%

ATP Hydrolysis Determines Cold Tolerance by Regulating Available Energy for Glutathione Synthesis in Rice Seedling Plants

Jiang

et al. 2020

Rice

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Background: Glutathione (GSH) is important for plants to resist abiotic stress, and a large amount of energy is required in the process. However, it is not clear how the energy status affects the accumulation of GSH in plants under cold stress. Results: Two rice pure lines, Zhongzao39 (ZZ39) and its recombinant inbred line 82 (RIL82) were subjected to cold stress for 48 h. Under cold stress, RIL82 suffered more damages than ZZ39 plants, in which higher increases in APX activity and GSH content were showed in the latter than the former compared with their respective controls. This indicated that GSH was mainly responsible for the different cold tolerance between these two rice plants. Interestingly, under cold stress, greater increases in contents of carbohydrate, NAD(H), NADP(H) and ATP as well as the expression levels of GSH1 and GSH2 were showed in RIL82 than ZZ39 plants. In contrast, ATPase content in RIL82 plants was adversely inhibited by cold stress while it increased significantly in ZZ39 plants. This indicated that cold stress reduced the accumulation of GSH in RIL82 plants mainly due to the inhibition on ATP hydrolysis rather than energy deficit. Conclusion: We inferred that the energy status determined by ATP hydrolysis involved in regulating the cold tolerance of plants by controlling GSH synthesis.

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Heat Stress Is More Damaging to Superior Spikelets than Inferiors of Rice (Oryza sativa L.) due to Their Different Organ Temperatures

Cited by 60 publications

References 59 publications

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Rapid induction of small heat shock proteins improves physiological adaptation to high temperature stress in peanut

ATP Hydrolysis Determines Cold Tolerance by Regulating Available Energy for Glutathione Synthesis in Rice Seedling Plants

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