PLTPA提高棉苗抗寒力的细胞学基础  

The Cytology Basis of PLTPA Increasing Cold Resistance of Cotton Seedlings

作　　者：武孟祥[1] 郝联芳[1] 

机构地区：[1]陕西师范大学生物系

出　　处：《棉花学报》1996年第2期97-100,共4页Cotton Science

基　　金：陕西省自然科学基金

摘　　要：生理生化测定表明：浸种棉苗和棉苗喷药的ＳＯＤ（超氧物岐化酶）、ＰＯＤ（过氧化物酶）、ＣＡＴ（过氧化氢酶）活性升高；ＭＤＡ（丙二醛）含量及电导率降低；Ｐｒｏ（脯胺酸）、可溶性总糖和叶绿素含量增加；根和叶的ＴＴＣ（氯化三苯基四氮唑）还原率同步增大，电导率同步降低。棉苗喷药后可抵抗－２℃（５ｈ）～－３℃（３ｈ）～－４℃（３ｈ）～－５℃（１ｈ）长达１２ｈ的低温不受冻害，这种抗寒办可保持一个月。Physiological biochemical measurement showed that the enzyme activities ofSOD,POD and CAT increased while the content of MDA decreased for cotton seedlings ofsoaked seeds and spray PLTPA;meanwhile, the contents of pro,soluble sugar andchlorophyll increased.Moreover,the increase of the TTC reducing ratio and the decreaseof the electrical conductvity ratio were synchronized perfectly in the root and leaf.Resultof the cold hardiness appraisal showed that cotton seedlings of spray PLTPA were exposedfor 12 hours under low temperature of -2℃(5h)～-3℃(3h)～-4℃(3h)～-5℃(1h)without damage. The cold hardiness could last for a month.

关 键 词：PLTPA 棉苗 抗寒力 细胞学基础 植物低温保护剂 棉花浸种 喷药 生理生化特性 

分 类 号：S562.01[农业科学—作物学] S482