The effects of exogenous nitric oxide donor sodium nitroprusside on substance metabolism of Ginkgo biloba leaves under drought stress were studied. The results showed that 250 micromol/L SNP treatment under 35% relative soil water content stress raised remarkably soluble sugar content , proline content , phenylalanine ammonia lyase activity , flavonoids and ginkgolides content of G. biloba leaves. Hemoglobin, used as NO scavenger, counteracted the effects of SNP in raising the soluble sug...更多
The effects of exogenous nitric oxide donor sodium nitroprusside on substance metabolism of Ginkgo biloba leaves under drought stress were studied. The results showed that 250 micromol/L SNP treatment under 35% relative soil water content stress raised remarkably soluble sugar content , proline content , phenylalanine ammonia lyase activity , flavonoids and ginkgolides content of G. biloba leaves. Hemoglobin, used as NO scavenger, counteracted the effects of SNP in raising the soluble sugar , proline , flavonoid , ginkgolide content and PAL activities , which indicates that the effects of sodium nitroprusside were through the nitric oxide released from sodium nitroprusside. We propose from these results that the roles of flavonoids and ginkgolides are the same as those of soluble sugars and proline under drought stress. NO may alleviate the damage caused by drought stress through raising soluble sugar, proline, flavonoid and ginkgolide content.收起
