3种观赏竹抗旱性生理生化指标研究

Researches on Physiological and Biochemical Indexes of Drought Resistance Stress of Three Ornamental Bamboos

研究了干旱胁迫条件下,凤尾竹、孝顺竹、四季竹等3种观赏竹叶片的游离脯氨酸含量、可溶性糖含量,超氧岐化酶(SOD)以及过氧化氢酶(CAT)的活性变化。结果表明:随着干旱胁迫时间的延长,3个竹种叶片脯氨酸含量呈增加趋势,叶片可溶性糖含量呈先升后降趋势,而叶片超氧岐化酶(SOD)以及过氧化氢酶(CAT)活性总体上均呈下降趋势。根据4项生理指标,采用模糊隶属函数法对其抗旱性进行综合评价,抗旱能力强弱顺序为:四季竹>凤尾竹>孝顺竹。

The contents of free proline , soluble sugar and SOD activity , CAT activity of three bamboo leaves （ B.multiplex cv.Fernleaf,B.multiplex （Lour.） Raeuschelex J,S.tootsik （Sieb.） Makino ） were studied under natural drought stress condi-tions.The results showed that free proline contents of bamboo leaves increased ,the soluble sugar content increased at first and then decreased ,SOD activity and CAT activity decreased with the prolongation of the stress time.The method of obscure mathematics was used to evaluate their drought resistance ability comprehensively based on physiological and biochemical indexes .The ability of drought resistance indicated that S.tootsik （ Sieb.） Makino＆gt;B.multiplex cv.Fernleaf＆gt;B.multiplex （ Lour.） Raeuschelex J accord-ing to the results of fuzzy administering function.