摘要
对干旱条件下３种不同耐旱性的水稻幼苗相对含水量（ＲＷＣ）、丙二醛含量及保护酶活性进行了比较研究。耐旱品种超氧物歧化酶（ＳＯＤ）活性在水分胁迫下降低幅度较小，不耐旱品种酶活性降低幅度较大。在轻度水分胁迫下耐旱品种过氧化物酶（ＰＯＤ）活性提高，不耐旱品种ＰＯＤ活性无变化，３个品种的过氧化氢酶（ＣＡＴ）活性均提高，耐旱性越强，活性提高幅度越大。严重水分胁迫下ＰＯＤ和ＣＡＴ活性均降低，耐旱性越强，活性降低幅度越小。
? The alterations in relative water contents( RWC) , malondialdehyde( MDA) contents and activities of protective enzymes were comparatively investigated among three different drought tolerant rice cultivars.The results showed that superoxide dismutase activities declined slightly in two drought- tolerant cultivars,but decreased significantly in the drought- sensitive cultivar under drought conditions.Peroxidase activities increased in drought-tolerant cultivars ,but altered little in drought- sensitive cultivar under slight drought. In contrast,increases of catalase activities of three different cultivars under were observed slight drought, with greater increases in two drought- tolerant cultivars. Under severe drought conditions,activities of peroxidase and catalase in three cultivars all declined,but more slowly in tolerant cultivars.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1997年第4期21-25,共5页
Journal of South China Agricultural University
基金
广东省自然科学基金
农业部"八五"应用基础研究项目
关键词
水稻
耐旱性
干旱条件
酶活性
幼苗
rice(Oryza sativa L.)
drought tolorance
superoxide dismutase
peroxidase
catalase
