哈密瓜自毒作用对幼苗生长和生理生化作用的影响

Effects of Hami melon’s Autointoxication on Seedling Growth,Physiology and Biochemistry

为研究哈密瓜叶水浸液的自毒作用对其幼苗生长和生理生化作用的影响,通过土培法进行幼苗生长试验并进行幼苗叶绿素、类胡萝卜素含量和过氧化物酶活性测定。结果表明:不同浓度的叶水浸液处理对幼苗根长和发根数具有抑制作用,随着浓度的增高,抑制作用逐渐增强,和对照相比,在浓度为50g/L、90g/L时达到显著或极显著水平;而在浓度为10g/L、50g/L时对株高和幼苗鲜重则具有显著的促进作用。经幼苗生理生化测定,叶绿素a、叶绿素b、类胡萝卜素含量随叶水浸液浓度升高而显著下降;过氧化物酶在水浸液浓度为50g/L时活性最高,之后随水浸液浓度增高而逐渐下降。

The autointoxication effects of leaf water extract of Hami melon on seedling growth,physiology and biochemistry were investigated.Seedling growth test had been done by soil culture.chlorophyll,carotenoid content and peroxidase activity were measured.The results showed that leaf water extract had significant lyinhibiting effects on root length and the root number of Hami melon in concentrations of 50 g/L,90 g/L,and the inhibiting effects were strengthened with increasing of water extract concentration,compared with controls;leafwater extract had some significantly promotion effects on plant height and fresh weigh in concentrations of10 g/L and 50 g/L.The content of chlorophyll a,chlorophyll b and carotenoid were significantly decreased within creasing of water extract concentration.Peroxidase activity was the highest in the water extract concentration of 50 g/L,followed with increasing of water extract concentration.