Diurnal Patterns Of Growth And Transient Reserves Of Sink And Source Tissues Are Affected By Cold Nights In Barley.
Diurnal Patterns Of Growth And Transient Reserves Of Sink And Source Tissues Are Affected By Cold Nights In Barley.
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DOI：
10.1111/pce.13735
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发表时间：
2020-02
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影响因子：
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通讯作者：
K. A. Barros;A. A. Esteves-Ferreira-A.;M. Inaba;H. Meally;J. Finnan;S. Barth;S. Davis;Ronan Sulpice
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文献类型：
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作者：
K. A. Barros;A. A. Esteves-Ferreira-A.;M. Inaba;H. Meally;J. Finnan;S. Barth;S. Davis;Ronan Sulpice
大麦被描述为主要使用蔗糖来满足夜间碳需求。为了了解瞬时碳是如何积累和利用的，以应对寒冷，大麦植物生长在寒冷的白天和/或夜晚的组合。白天和夜晚的寒冷都降低了生长。蔗糖是夜间生长的主要碳水化合物，占消耗碳的50-60%。在温暖的白天和夜晚，淀粉是第二个贡献者，占26%，苹果酸第三，占15%。在寒冷的夜晚，淀粉的贡献严重减少，由于其合成的抑制，包括在温暖的日子，苹果酸是第二个贡献者的碳需求与24-28%的碳消耗总量。我们建议，苹果酸起着至关重要的作用，作为一种替代碳源的蔗糖和淀粉在大麦。己糖，苹果酸，蔗糖动员和淀粉积累的影响大麦elf 3时钟突变体，表明时钟调节他们的代谢，但不影响生长和光合作用。总而言之，我们的数据表明，蔗糖和苹果酸和/或大麦生长机制的动员对寒冷敏感。本文受版权保护。All rights reserved.
Barley is described to mostly use sucrose for night carbon requirements. To understand how the transient carbon is accumulated and utilized in response to cold, barley plants were grown in a combination of cold days and/or nights. Both daytime and night cold reduced growth. Sucrose was the main carbohydrate supplying growth at night, representing 50-60% of the carbon consumed. Under warm days and nights, starch was the second contributor with 26% and malate the third with 15%. Under cold nights, the contribution of starch was severely reduced, due to an inhibition of its synthesis, including under warm days, and malate was the second contributor to C requirements with 24-28% of the total amount of carbon consumed. We propose that malate plays a critical role as an alternative carbon source to sucrose and starch in barley. Hexoses, malate, and sucrose mobilisation and starch accumulation were affected in barley elf3 clock mutants, suggesting a clock regulation of their metabolism, however without affecting growth and photosynthesis. Altogether, our data suggests that the mobilisation of sucrose and malate and/or barley growth machinery are sensitive to cold. This article is protected by copyright. All rights reserved.