青海扁茎早熟禾种子成熟过程中落粒性与生长生理特性的研究

Study on Shattering and Growth,Physiological Characteristics of Poa. pratensis var. anceps During the Process of Seed Development

研究了青海扁茎早熟禾(Poa.pratensisvar.anceps Gaud.cv.Qinghai)种子成熟过程中落粒率与生长、生理特性间的相关关系。结果表明,青海扁茎早熟禾种子落粒率与种子含水量、可溶性糖、电导率间呈极显著的负相关关系,与种子干重、淀粉、TTC、发芽率、发芽指数、活力指数、种苗芽长、盛花期后天数间呈极显著的正相关关系。在青海扁茎早熟禾盛花期后第28天,其种子含水量为35%,发芽率83.33%,发芽指数68.67,活力指数98.36,种苗芽长2.45 cm,电导率346.01μS/cm,TTC含量54.46μg/ml,可溶性糖含量7.27%,淀粉含量14.83%,落粒率为15.89%。种子已经达到生理成熟,此时采收,可获得最佳的种子产量和品质。

The correlation of shattering and growth, physiological characteristics of Poa. pratensis var. anceps during the process of seed development was researched in this study. The results indicated that there were very significant negative correlation between shattering rate and mositure content, soluble carbohydrate content, conductivity rate. And there were very significant positive correlation between shattering rate and seeds dry weight, starch content, TTC content, germination percentage, germination index, vigor index, seeding length, days after flowering stage. After blooming 28 days Poa pratensis seeds with water content of 35%, germination percentage of 83.33% ,germination index of 68.67 ,vigor index of 98.36 ,seeding length of 2.45 cm,conductivity rate of 346. 01μS/cm, TTC content of 54.46μg/ml, soluble carbohydrate content of 7.27%, starch content of 14.83% and shattering rate of 15.89%, at this time,seeds yield and quality were the best, it was the optimum time for seeds harvest.