LIMITATIONS TO ACCUMULATION OF STARCH IN DEVELOPING WHEAT GRAIN
LIMITATIONS TO ACCUMULATION OF STARCH IN DEVELOPING WHEAT GRAIN
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DOI：
10.1093/oxfordjournals.aob.a084630
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发表时间：
1972-01-01
期刊：
影响因子：
4.2
通讯作者：
RATHJEN, AJ
中科院分区：
文献类型：
--
作者：
JENNER, CF;RATHJEN, AJ
光合作用能力限制发育中的小麦籽粒中淀粉和干物质积累速率的假设已经通过在田间生长的落叶植物以及在蔗糖溶液中培养分离的穗进行了测试。在大多数情况下，完全落叶不会减少 4 至 10 天后产生的淀粉或干物质的量，也不会影响谷物中蔗糖的量。通过培养将蔗糖的潜在供应量增加到正常水平以上并不会导致谷物中淀粉沉积或蔗糖数量的增加。去除叶子会导致谷物鲜重的增加略有下降，而落叶确实减少了淀粉的积累，但对谷物中蔗糖的含量没有类似的影响。因此，得出结论，上述假设是无效的。提出了支持这一概念的案例，即调节蔗糖进入谷物的机制限制了淀粉的积累。
The postulate that photosynthetic capacity limits the rate of accumulation of starch and dry matter in the developing wheat grain has been tested by defoliating plants growing in the field, and by culturing detached ears on solutions of sucrose. In most cases complete defoliation did not reduce the amounts of starch or dry matter produced 4 to 10 days later, or affect the amounts of sucrose in the grain. Increasing the potential supply of sucrose above normal levels by culturing did not lead to increases in either the deposition of starch or the quantity of sucrose in the grain. Removing leaves caused small depressions in the gain in fresh weight of the grain, and where defoliation did reduce the accumulation of starch there was no comparable effect on the amount of sucrose in the grain. Accordingly, it is concluded that the postulate stated above is invalid.The case in support of the concept that it is the mechanism regulating the passage of sucrose into the grain which imposes a limitation on the accumulation of starch is presented.