Harvest index, a parameter conditioning responsiveness of wheat plants to elevated CO2.
Harvest index, a parameter conditioning responsiveness of wheat plants to elevated CO2.
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DOI：
10.1093/jxb/ert081
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发表时间：
2013-04
影响因子：
6.9
通讯作者：
Erice G
中科院分区：
文献类型：
--
作者：
Aranjuelo I;Sanz-Sáez Á;Jauregui I;Irigoyen JJ;Araus JL;Sánchez-Díaz M;Erice G
世界人口的增长要求发展高产农业。为此，必须确定调节作物对预测[CO2]响应的目标点。本研究的目的是确定穗汇强度与叶片蛋白质和代谢组学特征的相关性，及其对暴露于高[CO2]的硬粒小麦植株的光合活性和产量的影响。为此，将收获指数高的基因型小麦（Triticum durum var. Sula）和收获指数低的基因型小麦（Triticum durum var. Blanqueta）暴露在二氧化碳温室中升高的[CO2] （700 μ mol mol - 1 vs 400 μ mol mol - 1 CO2）中。获得的数据强调，升高的[CO2]只增加了HI最大的基因型的植物生长；苏拉。气体交换分析表明，虽然暴露于700µmol mol - 1会降低Rubisco含量，但Sula能够提高CO2同化的光饱和速率（Asat），而在Blanqueta中，碳水化合物不平衡导致Asat的下调。在升高的[CO2]下，两种基因型中Rubisco的特异性消耗，以及卡尔文循环中其他蛋白质的增强，表明Rubisco的N重新分配给RuBP再生。此外，在700µmol mol - 1 CO2环境下生长的Blanqueta中检测到N、NO3 -、氨基酸和有机酸含量的下调，以及氨基酸合成相关蛋白质的消耗，表明N同化的抑制参与了碳水化合物失衡，从而导致了这些植物光合作用和生长的下调。
The expansion of the world’s population requires the development of high production agriculture. For this purpose, it is essential to identify target points conditioning crop responsiveness to predicted [CO2]. The aim of this study was to determine the relevance of ear sink strength in leaf protein and metabolomic profiles and its implications in photosynthetic activity and yield of durum wheat plants exposed to elevated [CO2]. For this purpose, a genotype with high harvest index (HI) (Triticum durum var. Sula) and another with low HI (Triticum durum var. Blanqueta) were exposed to elevated [CO2] (700 µmol mol–1 versus 400 µmol mol–1 CO2) in CO2 greenhouses. The obtained data highlighted that elevated [CO2] only increased plant growth in the genotype with the largest HI; Sula. Gas exchange analyses revealed that although exposure to 700 µmol mol–1 depleted Rubisco content, Sula was capable of increasing the light-saturated rate of CO2 assimilation (Asat) whereas, in Blanqueta, the carbohydrate imbalance induced the down-regulation of Asat. The specific depletion of Rubisco in both genotypes under elevated [CO2], together with the enhancement of other proteins in the Calvin cycle, revealed that there was a redistribution of N from Rubisco towards RuBP regeneration. Moreover, the down-regulation of N, NO3 –, amino acid, and organic acid content, together with the depletion of proteins involved in amino acid synthesis that was detected in Blanqueta grown at 700 µmol mol–1 CO2, revealed that inhibition of N assimilation was involved in the carbohydrate imbalance and consequently with the down-regulation of photosynthesis and growth in these plants.
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影响因子：
2.9
作者：
BLUM, H;BEIER, H;GROSS, HJ
通讯作者：
GROSS, HJ
影响因子：
2
作者：
Foulkes, M. J.;Snape, J. W.;Sylvester-Bradley, R.
通讯作者：
Sylvester-Bradley, R.
影响因子：
6.2
作者：
Ainsworth, EA;Rogers, A;Long, SP
通讯作者：
Long, SP
影响因子：
56.9
作者：
Arnon, DI;Hoagland, DR
通讯作者：
Hoagland, DR
影响因子：
5.2
作者：
Ercoli, Laura;Lulli, Leonardo;Arduini, Iduna
通讯作者：
Arduini, Iduna