Temperature, water and fertilizer influence the timing of key events during grain development in a US spring wheat
Temperature, water and fertilizer influence the timing of key events during grain development in a US spring wheat
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DOI：
10.1006/jcrs.2002.0483
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发表时间：
2003-01-01
影响因子：
3.8
通讯作者：
Lieu, D
中科院分区：
文献类型：
--
作者：
Altenbach, SB;DuPont, FM;Lieu, D
以美国春小麦(Triticum aestivum(L.))为材料，利用受控环境确定了温度、水和肥料对籽粒发育关键转化点的影响方式，并研究了复合环境因子的影响。在籽粒发育过程中，当植株受到极高温(37/17℃或37/28℃昼夜)时，达到最大籽粒含水率、最大干重和干草背心成熟的时间比保持在24/17℃昼夜条件下的植株短。淀粉积累的速度相似，但淀粉积累的开始和停止发生的时间较早。在高温条件下，胚乳组织中的细胞凋亡也较早发生，并与生理成熟相吻合。在37/17℃C处理中加入干旱，进一步缩短了达到最大含水率和干重的时间，缩短了淀粉积累的持续时间，但不影响蛋白质积累或籽粒干燥的时间。花后施肥对不同温度条件下的最大含水率、干重、细胞凋亡率和果实成熟度几乎没有影响，也不影响淀粉积累的时间。但不施花后肥，蛋白质积累的速率和持续时间都有所降低。(C)2003年，爱思唯尔科学有限公司出版。
Controlled environments were used to define the manner in which temperature, water and fertilizer affect the timing of key transition points during grain development and to investigate the effects of combined environmental factors in a US spring wheat (Triticum aestivum (L.)). When plants were subjected to very high temperature regimens (37/17 or 37/28degreesC day/night) during grain development, the times to maximum kernel water content, maximum dry weight and hay-vest maturity were shorter than in plants maintained under a 24/17 degreesC day/night regimen. Starch accumulated at similar rates, but the onset and cessation of starch accumulation occurred earlier. Apoptosis in endosperm tissue also occurred earlier under high temperatures and coincided with physiological maturity. The addition of drought to the 37/17 degreesC regimen further shortened the time to maximum water content and dry weight and reduced the duration of starch accumulation, but did not influence the timing of protein accumulation or kernel desiccation. Post-anthesis fertilizer had little effect on time to maximum water content, dry weight, apoptosis, or harvest maturity under any of the temperature regimens and did not influence the timing of starch accumulation. However, both the rate and duration of protein accumulation were reduced when post-anthesis fertilizer was omitted. (C) 2003 Published by Elsevier Science Ltd.