摘要
用^(14)CO_2研究杂交水稻光合产物运转分配的结果表明,在水稻植株的不同生育期,各有其相应的营养输入中心。钾(K)能促进功能叶光合产物向外输出。分蘖期光合产物主要向生长旺盛的幼嫩部位运输,^(14)CO_2引入后24小时,以80ppmK培养的植株,K向幼嫩部位的输入量占总量的32.65％,而以1ppmK培养的只占5.92％。灌浆期光合产物以输入谷粒为主,^(14)CO_2引入后8小时,经40ppmK培养的植株,其光合产物向谷粒的输入量占总量的64.4％,而1—5ppmK培养的仅占36.29％;引入后36小时,其输入量分别增长至76.61％与51.62％。光合产物的输出速度,灌浆期的植株比分蘖期的快。
The effects of potassium on the transport and distribution of photosynthate in hybrid rice have been studied by using ^(14)CO_2. The results showed that potassium could stimulate transport of photosynthate out of the photosynthately active leaves. At tillering stage, ^(14)C-Photosynthate of the first completely extended leaf from top transported mainly to rapidly growing leaves. After 24 hours of the introduction of ^(14)CO_2, the amount of ^(14)C-photosynthate transported to the unextended leaf accounted for 32.65% of the total amount of ^(14)C-photosynthate assimilated in the plants cultured in 80ppm-containing Ksolution whereas that in the pants cultured in 80ppm-containing K solution only accounted for 5.92%. At filling stage, the bulk of the ^(14)C-photosynthate assimilated in flag leaf transported to grain. After 8 hours of ^(14)CO_2 introduction, the amount of the ^(14)C-photosynthate transported to grain accounted for 64.4% of the total in the plants treated with 40ppm potassium while that in the plants treated with 1-5 ppm K was only 36.2% of the total. As transport time extended to 36h, the imported ^(14)C-photosynthate increased to 76.6% and 51.6% respectively.
出处
《浙江农业学报》
CSCD
1991年第1期1-4,共4页
Acta Agriculturae Zhejiangensis
基金
农业部资助课题
关键词
杂交水稻
光合产物
运转分配
钾
Hybrid rice
Photosynthate
Transporting and distributing
Potassium
