论文部分内容阅读
供试高羊茅法恩和赛福瑞两个品种的种子在发育过程中含水量不断下降，由最初的60～70％降至最终的13％左右，种子的鲜重先于干重达到最高值，然后逐渐下降，而干物质重在含水量迅速下降时增加缓慢。法恩和赛福瑞高羊茅种子在含水量分别降至45．3和44．1％后进入生理成熟期。淀粉与可溶性糖含量则成相反的变化，淀粉在种子发育初期积累迅速，ATP和TTC含量均达到最高值。随着种子的脱水干燥，可溶性糖含量降至4～5％，ATP和TTC含量亦随之降低．而淀粉则不再累积，但仍保持较高水平。
The water content of two varieties of high-forage Fehne and Seifuilui decreased during the development, from the initial 60 ~ 70% to the final 13%, the fresh weight of the seeds reached the highest value before the dry weight, Then declines gradually, whereas the dry matter weight increases slowly when the water content declines rapidly. Farn and Seyfried tall fescue seeds entered the physiologic maturity after the water content dropped to 45.3 and 44.1% respectively. Starch and soluble sugar contents changed in the opposite direction. Starch accumulated quickly in the early stage of seed development, with the highest contents of ATP and TTC. As the seeds dehydrate and dry, the soluble sugar content drops to 4 to 5%, and the ATP and TTC contents also decrease. The starch is no longer accumulated, but still maintain a high level.