论文部分内容阅读
以杂草稻heb07-2、wr04-6及巴西陆稻IAPAR9为研究材料,采用人工气候箱培养幼苗,利用20%聚乙二醇6000(PEG-6000)模拟干旱条件,研究了杂草稻及巴西陆稻幼苗叶片和根系生理特性标的变化。结果表明:干旱胁迫下,杂草稻heb07-2幼苗的叶片与根系具有较高的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活力;杂草稻heb07-2的可溶性糖含量、可溶性蛋白含量高于其它材料。杂草稻heb07-2细胞膜系统保持完整,膜质过氧化程度小于其它材料,表明干旱胁迫对杂草稻heb07-2伤害较小,具有较强苗期抗旱性。
The weedy rice heb07-2, wr04-6 and Brazilian upland rice IAPAR9 were used as materials to cultivate the seedlings in an artificial climate chamber. The drought conditions were simulated by using 20% polyethylene glycol 6000 (PEG-6000) Changes of Physiological Characteristics of Leaves and Roots in Upland Rice Seedlings. The results showed that the leaf and root of weedy rice heb07-2 had higher activity of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) under drought stress. The soluble sugar content and soluble protein content of grass heb07-2 were higher than those of other materials. Weedy rice heb07-2 cell membrane system remains intact, and the extent of membrane peroxidation is less than that of other materials, indicating that drought stress has less damage to weedy rice heb07-2 and stronger drought tolerance at seedling stage.