| 罗明华,罗英,王璞.水杨酸处理对干旱胁迫下丹参幼苗抗氧化能力的影响[J].干旱地区农业研究,2010,28(4):102~105 |
| 水杨酸处理对干旱胁迫下丹参幼苗抗氧化能力的影响 |
| Effects of exogenous salicylic acid on antioxidant capacity in Salvia miltiorrhiza seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2010.04.19 |
| 中文关键词: 丹参 干旱胁迫 水杨酸 抗氧化能力 |
| 英文关键词:Salvia miltiorrhiza Bunge salicylic acid drought stress antioxidant capacity |
| 基金项目:绵阳师范学院科研启动基金(MQD2007A005) |
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| 中文摘要: |
| 以丹参幼苗为试验材料,研究了叶面喷施0.75 mmol/L的水杨酸(SA)对干旱胁迫下丹参幼苗相对含水量、电解质渗漏率、H2O2和丙二醛含量、4种抗氧化酶活性等生理指标的影响。结果表明:随着干旱胁迫的进行,丹参幼苗叶片相对含水量降低,H2O2含量增加,电解质渗漏率和丙二醛含量升高,水杨酸处理则延缓了这些参数变化;尽管SA处理后,CAT、APX活性暂时降低,但在随后的胁迫过程中,丹参幼苗叶片SOD、POD、CAT、APX活性显著高于对照。由此可知:水杨酸处理提高了丹参幼苗抗氧化酶活性,增强了植株对干旱胁迫的抵抗能力。 |
| 英文摘要: |
| Salvia miltiorrhiza seedlings were employed to study the effects of exogenous salicylic acid(0.75 mmol/L)treatment on some physical characteristics of S. miltiorrhiza under drought stress, such as relative water content(RWC), electrolyte leakage (EL)，content of H2O2 and malonyldialdehyde(MDA), and activity of superoxide dismutase(SOD), peroxidase(POD), catalase(CAT) and ascorbate perxidese(APX). The results showed that with drought stres, RWC of leaves of S. mitiorrhiza seedlings decreased, and EL, content of H2O2 and MDA increased gradually, however, ex-ogenous SA treatment alleviated these changes. Although the activity of CAT and APX decreased temporally at the begin-ning of SA treatment , the activity of SOD, POD, APX and CAT in the leaves of seedlings treated by SA was higher than that in single drought stress in the subsequent progress of drought stress . Therefore, these results indicated that SA en-hanced the activity of anti-oxidative enzymes in leaves of S. miltiorrhiza seedlings and strengthened the tolerance of S. miltiorrhiza seedlings against drought stress. |
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