硝普钠和Zn2+对盐胁迫下棉花幼苗生长的影响

摘要

为了研究外源NO供体硝普钠(SNP)和Zn2+复配浸种对盐胁迫下棉花(Gossypium spp.)幼苗生长的影响,以鲁21为材料,考察了不同浓度的SNP和Zn2+复配浸种后对盐胁迫下棉花种子的发芽率、发芽势及幼苗叶片各项生理生化指标的影响.结果表明,SNP和Zn2+复配浸种能显著提高盐胁迫条件下棉花种子发芽率、发芽势,提高棉花幼苗根系活力、POD活性、SOD活性、叶绿素及脯氨酸含量,并能显著降低幼苗叶片的相对电导率及MDA含量,其中以0.10 mmol/L SNP和20 mg/L Zn2+复配浸种的效果最好.%To research the effects of soaking seeds using compound of SNP (NO donor) and Zn2+ on the cotton(Gossypium spp.) seedling growth under salt stress,taking Lu 21 as materials,the effects of compound of SNP and Zn2+ on germination rate, germination potential,seedling leaf conductivity,root activity,POD activity,SOD activity,chlorophyll content,proline content and MDA content of cotton under salt stress were studied. The results showed that,under salt stress conditions,SNP and Zn2+compounds could significantly improve the germination rate,germination potential,root activity,POD activity,SOD activity, chlorophyll and proline content of cotton seed,and reduce the conductivity and MDA content of seedling leaves. The com-pounds of 0.10 mmol/L SNP and 20 mg/L Zn2+ had the best effect.