不同氮营养对干旱逆境下水稻生长及抗氧化性能的影响研究

Effects of different nitrogen nutrition on the growth and autioxidant characteristics of rice (Oryza sativa L.) stressed by drought

局部无菌培养条件下,采用聚乙二醇(PEG6000)模拟水稻幼苗的干旱逆境,研究不同氮营养对其生长及抗氧化性能的影响。结果表明,与缺氮及无机氮处理相比,干旱胁迫后,有机氮营养处理的水稻具有较强的叶片抗脱水能力及茎叶干物质积累能力,并可维持相对较高的叶水势;抗氧化性能方面,有机氮营养的水稻叶片保护酶(SOD、POD、CAT)在干旱胁迫后可维持相对较高活性或受抑程度较低,所受膜脂过氧化(MDA含量)程度亦相对较低。

Using partially sterile culture method, acteristics of rice （ Oryza sativa L. ） stressed by effects of different nitrogen nutrition on the growth and antioxidant chardrought was studied. Drought polyethylene glycol （PEG）. The results showed that, higher foliar dehydration stricken on the plant was induced by resisting capacity and higher shoot dry weight cumulation was observed for the rice treated with organic nitrogen compared with rice supplied with no nitrogen or inorganic nitrogen. A higher foliar water potential was also found for the organic nitrogen treated rice. Under drought stress, rice supplied with organic nitrogen could maintain comparatively higher activities of SOD, POD and CAT in the leaves and lower membrane peroxidation （Expressed by MDA content）.