Ca^（2＋）和亚精胺在莴苣种子萌发过程中的相互关系

Relationship of Ca￣(2+) and spermidine on germination of lettuce seeds

莴苣（挂丝红品种）种子萌发过程中，内源亚精胺（Ｓｐｄ）含量逐渐增加．Ｃａ２＋通道抑制剂Ｃｏ２＋和Ｌ３＋、钙调素（ＣａＭ）拮抗剂氯两嗪（ＣＰＺ）处理抑制种子内源亚精胺含量的增加，Ｃａ２＋可部分逆转Ｃｏ２＋和Ｌａ３＋的抑制效应．外源亚精胺处理能部分逆转Ｃｏ２＋和Ｌａ３＋对萌发的抑制效应．表明Ｃａ２＋和ＣａＭ对种子萌发的调节作用与其对亚精胺含量的影响有关．

The relationship of Ca2+ and Spd on germination of lettuce (Lactuce Sativa L.) seeds is investigated. The content of endogenous Spd increases gradually during seed germinatioll. Co2+, La3+ and chlorpromazin (CPZ, calmodulin antagonist) could be used to inhibit the rise of endogenous Spd contents, but their inhibition is partially reversed by Ca2+. The seed germination inhibited by Co2+ and La3+ is partially reversed by exogenous Spd. The results suggest that the regulation of Ca2+ and CaM to seed germination is related to their effects on endogenous Spd contents.