水稻品种间耐铜毒差异性及与根系形态、生理学特征的关系

Difference of Tolerance to Copper Poison among Rice Varieties and Its Relationship with Root Morphological and Physiological Characters

研究结果表明:不同水稻品种耐铜毒能力有较大的差异。在供试的8个品种中,“赣香糯”耐铜毒能力最强,在铜毒下该品种的有效穗和产量相对无铜毒处理下降率均最低,分别为24.0%和37.5%。“60029”表现耐铜毒性最差,其相对于无铜毒处理有效穗减少了64.4%,产量减少了72.2%。根系发达、根系活跃吸收表面积及总吸收表面积大的品种,有较强的耐铜毒性。

The results showed that there was difference of tolerance to copper poison among various rice varieties, “Ganxiangnuo” had the strongest tolerance to copper poison among tested rice varieties, and its effective panicles and yield decreased by 24.0% and 37.5% respectively as compared with those of no copper poison treatment. “60029” performed the weakest tolerance to copper poison, its effective panicles and yield decreased by 64.4% and 72.2% respectively as compared with those of no copper poison treatment. The rice varieties with strong root system, large active absorption root surface and total root surface area had strong tolerance to copper poison.