海岛棉棉铃发育过程中糖与纤维素含量变化

 以两个主栽海岛棉品种新海21提高系和新海28（YX-193和XH-28）为材料，在南疆膜下滴灌条件下于2006和2007年对海岛棉棉铃发育过程中糖与纤维素含量的变化进行了研究。结果表明，随铃龄的增长，铃壳、种子和纤维中糖含量变化呈单峰曲线，即自花后快速上升，21～28 d达到最大值，随后迅速下降，到吐絮期降至最低；纤维素于花后14 d左右开始大量合成，含量至吐絮期达最大值；纤维中可溶性固形物含量随着铃龄增加不断减小。棉铃不同部位的可溶性糖、还原糖含量及转移率表现为纤维＞种子＞铃壳。YX-193铃壳、种子两种糖的转移率较XH-28略高，说明它“装载”和“转运”能力强，有利于纤维发育。

Dynamics of Sugar and Cellulose Synthesis in Bolls of Island Cotton(Gossypium barbadense L.)

Sugar contents and cellulose deposition were monitored in the bolls of two varieties Xinhai 21 and Xinhai 28(YX-193 and XH-28) of island cotton in South Xinjiang in 2006 and 2007.After anthesis,total sugars in boll shells,seeds and fiber kept increasing and reached their maximum level at 21-28 days post anthesis(DPA).After that the sugar contents rapidly declined and reached the low level at the boll opening period.The cellulose was synthesized starting form 14 DPA and reached a peak at the boll opening sta...