同德小花碱茅种子发育过程中几个生理指标的变化

Changeable features of several physiological parameters of seed development process of Puccinellia tenuiflora cv.Tongde

采用6种活力测定方法,研究了同德小花碱茅(Puccinellia tenuiflora cv.Tongde)种子发育过程中含水量、种子质量和营养物质等生理生化的变化。试验结果表明,同德小花碱茅种子发育过程中含水量散失速率呈先快后慢的规律,在盛花期后26d种子达到生理成熟,含水量为27.85%,种子中可溶性糖的含量随种子成熟逐渐减少,而淀粉含量变化则相反。同德小花碱茅种子发育过程中植物内源激素生长素、赤霉素和脱落酸的含量高峰依次出现。本研究表明,种子活力随种子成熟不断增加,在盛花期后26d达到最高水平。

Six methods were used to measure moisture content, physiological and biochemical parameters of seed quality of Puccinellia tenuiflora cv. Tongde in the seed development process. The results of this study indicated that the loss rate of seed moisture content showed a firstly quick and then slow trend and the seeds became mature when they developed for 26 clays after peak anthensis with 27.85 G of seed mois- ture content. The seed soluble sugar content of P. tenuiflora cv. Tongde decreased gradually with the seed development, on the contrary, the starch content increased. The maximum IAA content in the devel- opment process of P. tenuiflora cv. Tongde seeds was firstly appeared and the maximum was finally appeared. This study suggested that the seed vigor continually increased with seed development, peaking at 26 clays after peak anthensis.