【摘要】 0.001～1.0 mmol·L^-1一氧化氮（NO）供体硝普钠（SNP）均能提高玉米种子的发芽率,缓解盐胁迫下种子萌发的抑制作用,其中0.1 mmol·L^-1SNP的效果最佳。用胞外游离Ca²⁺螯合剂EGTA、质膜Ca²⁺通道阻断剂LaCl₃和液泡Ca²⁺释放抑制剂钌红与0.1 mmol·L^-1 SNP共处理,均能减弱或抵消SNP促进种子萌发的作用。据此推测,钙离子参与SNP促进盐胁迫下玉米种子萌发的信号转导过程。更多还原

【Abstract】 0.001-1.0 mmol·L^-1sodium nitroprusside（SNP）,an exogenous nitric oxide（NO）donor,could increase the seed germination percentage of maize（Zea mays）and relieve the inhibition of salt stress to seed germination.The effect of 0.1 mmol·L^-1SNP was the best.After treatment of extracellular dissociation Ca²⁺ chelant EGTA,in combination with blocker of plasma membrane Ca²⁺channels LaCl₃ and inhibitor of vacuole Ca²⁺release ruthenium red,the effect of SNP was decreased.Our results suggested that Ca²⁺was involved in the signal transduction of maize seed germination induced by SNP under salt stress.更多还原