摘要
试验探讨了花后高温对小麦籽粒胚乳细胞发育及粒重的影响 ,结果表明 :花后高温时间对籽粒发育及粒重影响表现为 :2 0～ 2 2天 >12～ 14天 >5～ 7天 >1～ 3天 >2 8～ 30天 >对照。高温短时间内提高籽粒胚乳细胞分裂速率 ,但由于胚乳细胞分裂时间明显缩短 ,而减少最终胚乳细胞数 ,显著降低粒重。局部高温处理对籽粒重有显著影响 ,穗部对高温的敏感性要大于叶部。高温并不改变同一小穗不同粒位间胚乳细胞数和粒重的分布 ,但扩大粒重间的差异。
The pot experiment was carried out from 1993 to 1995 in Yangzhou to study the influence of high temperature after anthesis on endosperm cell development and grain growth in wheat( T. aestivum L. cv. Yangmai 5 and PH85 4). The main results were as follows. The effect of high temperature after anthesis on grain weight was: treatment 20th～22nd day>12th～14th day>5th～7th day>1st～3rd day>28th～30th day>CK. The endosperm cell proliferation rate was increased during a short period after high temperature, but the proliferation duration was significantly shortened, which resulted in the decrease of the maximum endosperm cell number and the decline of grain weight. The high temperature in spike or leaf parts could significantly affect grain weight and spikes was more sensitive to high temperature than leaves. The order of grain endosperm cell number and weight in different positions was not changed under high temperature treatment, but the difference was enlarged.
出处
《作物学报》
CAS
CSCD
北大核心
2000年第4期399-405,共7页
Acta Agronomica Sinica
基金
国家教委资助优秀年轻教师基金
江苏省青年科技基金资助项目
关键词
小麦
高温
粒重
胚乳细胞
Wheat
High temperature
Grain weight
Endosperm cell numberX
