Heat stress-reduced kernel weight in rice at anthesis is associated with impaired source-sink relationship and sugars allocation

Zhang, Caixia; Feng, Bo; Chen, Tingting; Fu, Weimeng; Li, Hubo; Li, Guangyan; Jin, Qing; Tao, Longxing

doi:10.1016/j.envexpbot.2018.08.021

Cited by 74 publications

(69 citation statements)

References 76 publications

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“…Previous studies have reported that loss-of-function invertase mutants had lower invertase activity and thus lower seed weights [51][52][53][54], which indicated that invertase activity had a critical role in the regulation of seed development. The role of SuSy gene was also important for carbon allocation during seed filling, especially when subjected to drought, cold, and heat stress [14,55]. In our study, a similar trend in expression levels among GmSuSy genes, GmA-INV, and GmC-INV ( Figure 6E-H) reflected trends in SuSy, AI, and NI activity levels ( Figure 4F-H) under drought stress.…”

Section: Drought Stress Affects Carbohydrate Enrichment and Metabolissupporting

confidence: 76%

“…The expression levels of SuSy and SPS in cotton leaves were up-regulated as water-logging was prolonged [13]. A more recent study demonstrated that the inhibition of assimilate distribution induced rice grain weights to decrease under heat stress, which was associated with impaired sugar allocation and prominent changes in the expression of sucrose synthase genes such as OsSuSy2, OsSuSy3, and OsSuSy4 [14].…”

Section: Introductionmentioning

confidence: 98%

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Effect of Drought Stress during Soybean R2–R6 Growth Stages on Sucrose Metabolism in Leaf and Seed

Zhao

Chen

et al. 2020

IJMS

102

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Sucrose is the main photosynthesis product of plants and the fundamental carbon skeleton monomer and energy supply for seed formation and development. Drought stress induces decreased photosynthetic carbon assimilation capacity, and seriously affects seed weight in soybean. However, little is known about the relationship between decreases in soybean seed yield and disruption of sucrose metabolism and transport balance in leaves and seeds during the reproductive stages of crop growth. Three soybean cultivars with similar growth periods, “Shennong17”, “Shennong8”, and “Shennong12”, were subjected to drought stress during reproductive growth for 45 days. Drought stress significantly reduced leaf photosynthetic rate, shoot biomass, and seed weight by 63.93, 33.53, and 41.65%, respectively. Drought stress increased soluble sugar contents, the activities of sucrose phosphate synthase, sucrose synthase, and acid invertase enzymes, and up-regulated the expression levels of GmSPS1, GmSuSy2, and GmA-INV, but decreased starch content by 15.13% in leaves. Drought stress decreased the contents of starch, fructose, and glucose in seeds during the late seed filling stages, while it induced sucrose accumulation, which resulted in a decreased hexose-to-sucrose ratio. In developing seeds, the activities of sucrose synthesis and degradation enzymes, the expression levels of genes related to metabolism, and the expression levels of sucrose transporter genes were enhanced during early seed development under drought stress; however, under prolonged drought stress, all of them decreased. These results demonstrated that drought stress enhances the capacity for unloading sucrose into seeds and activated sucrose metabolism during early seed development. At the middle and late seed filling stages, sucrose flow from leaves to seeds was diminished, and the balance of sucrose metabolism was impaired in seeds, resulting in seed mass reduction. The different regulation strategies in sucrose allocation, metabolism, and transport during different seed development stages may be one of the physiological mechanisms for soybean plants to resist drought stress.

show abstract

Section: Drought Stress Affects Carbohydrate Enrichment and Metabolissupporting

confidence: 76%

Section: Introductionmentioning

confidence: 98%

Effect of Drought Stress during Soybean R2–R6 Growth Stages on Sucrose Metabolism in Leaf and Seed

Zhao

Chen

et al. 2020

IJMS

102

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show abstract

“…Previous studies have reported that loss-of-function invertase mutants had lower invertase activity and thus lower seed weights [65][66][67][68], which indicated that invertase activity had a critical role in the regulation of seed development. The role of SuSy gene was also important for carbon allocation during seed filling, especially when subjected to drought, cold, and heat stress [18,69]. In our study, a similar trend in expression levels among GmSuSy genes, GmA-INV, and GmC-INV ( Fig.…”

Section: Drought Stress Affects Carbohydrate Enrichment and Metabolissupporting

confidence: 78%

“…The expression levels of SuSy and SPS in cotton leaves were up-regulated as water-logging was prolonged [17]. A more recent study demonstrated that the inhibition of assimilate distribution induced rice grain weights to decrease under heat stress, which was associated with impaired sugar allocation and prominent changes in the expression of sucrose synthasegenes such as OsSuSy2, OsSuSy3, and OsSuSy4 [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of drought stress during soybean R2-R6 growth stages on sucrose metabolism and its transport from leaf to seed

Du¹,

Zhao²,

Chen³

et al. 2019

Preprint

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Background Sucrose is the main photosynthesis product of plants and the fundamental carbon skeleton monomer and energy supply for seed formation and development. Drought stress induces decreased photosynthetic carbon assimilation capacity and seriously affects seed weight in soybean. However, little is known about the relationship between decreases in soybean seed yield and disruption of sucrose metabolism and transport balance in leaves and seeds during the reproductive stages of crop growth.Results Three soybean cultivars with similar growth periods, ‘Shennong17’, ‘Shennong8’, and ‘Shennong12’ were subjected to drought stress during reproductive growth for 45 days. Drought stress significantly reduced leaf photosynthetic rate, shoot biomass, and seed weight. Drought stress changed the distribution of carbon assimilation products in leaves, thus decreasing starch content and increasing soluble sugar content. Drought stress increased the activities of sucrose phosphate synthase, sucrose synthase, and acid invertase enzymes, and up-regulated the expression levels of GmSPS1 , GmSuSy2 , and GmA-INV in leaves. Drought stress decreased the contents of starch, fructose, and glucose in seeds during the late seed filling stages, while it induced sucrose accumulated, which resulted in a decreased hexose-to-sucrose ratio. In developing seeds, the activities of sucrose synthesis and decomposition enzymes and the expression levels of genes related to metabolism were enhanced during early seed development under drought stress; however, under prolonged drought stress, all of them decreased. The expression levels of sucrose transporter genes in seeds were up-regulated under drought stress during early seed development, but down-regulated in leaves and seeds during the middle and late seed filling stages.Conclusion These results demonstrated that drought stress enhances the capacity for unloading sucrose into seeds and activated sucrose metabolism in seeds during early seed development. At the middle and late seed filling stages, sucrose flow from leaves to seeds was diminished, and the balance of sucrose metabolism was impaired in seeds, resulting in seed mass reduction. The different regulation strategies in sucrose allocation, metabolism, and transport during different seed development stages may be one of the physiological mechanisms for soybean plants to resist drought stress.

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“…After a 30-min dark adaptation period, Fv/Fm and Y (II) of the leaves were measured using a portable chlorophyll fluorescence spectrometer (PAM-2500 chlorophyll fluorescence system; Heinz Walz, Effeltrich, Germany) (Zhang et al 2018a).…”

Section: Measurements Of Chlorophyll Content and Fluorescence Quantummentioning

confidence: 99%

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-reduced kernel weight in rice at anthesis is associated with impaired source-sink relationship and sugars allocation

Cited by 74 publications

References 76 publications

Effect of Drought Stress during Soybean R2–R6 Growth Stages on Sucrose Metabolism in Leaf and Seed

Effect of Drought Stress during Soybean R2–R6 Growth Stages on Sucrose Metabolism in Leaf and Seed

Effect of drought stress during soybean R2-R6 growth stages on sucrose metabolism and its transport from leaf to seed

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

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