丹东杂草稻种子的耐冻能力和低温发芽特性研究

被引:54
作者
陈惠哲
玄松南
王渭霞
邵国胜
孙宗修
机构
[1] 中国水稻研究所水稻生物学国家重点实验室
关键词
杂草稻; 耐冻性; 低温; 发芽;
D O I
10.16819/j.1001-7216.2004.02.005
中图分类号
S511 [稻];
学科分类号
摘要
为了解丹东杂草稻种子冬季在野外能存活的原因 ,将丹东杂草稻和对照品种越光的干种子在水中浸不同时间 ,后在 - 2 0℃下处理 7d,在 2 5℃下发芽。对照品种越光在浸种 1h后冷冻处理 ,其种子的发芽率从 98%降为 4 % ,浸种时间延长到 1.5h已不能成苗 ,而丹东杂草稻种子在 1h浸种处理后 ,其发芽基本不受影响 ,甚至在 3h浸种处理后成苗率仍达2 3%。在不同低温下发芽试验中发现丹东杂草稻在 11℃能发芽 ,杂草稻的发芽临界温度要比对照越光低。讨论了杂草稻种子抗冻的潜在价值。
引用
收藏
页码:23 / 26
页数:4
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