紧凑型梨解剖结构及内源激素变化Study on the changes of anatomical structure and endogenous hormones in the pear trees of compact type
姜淑苓;陈长兰;王斐;欧春青;王西成;贾敬贤;马力;
摘要(Abstract)：
以两类不同株型梨品种(系)为试材,研究了紧凑型与普通型梨一年生嫁接苗的形态特征、生长发育特点、内源激素含量变化及15 a生树新梢的解剖结构。结果表明,与普通型相比,紧凑型嫩梢中脱落酸(ABA)和赤霉素(GA3)含量显著较少,细胞分裂素(ZR及Z+ZR)含量显著较多,生长素(IAA)含量稍高于普通型但差异不显著。紧凑型新梢顶端木薄壁细胞显著增加,导管、木质纤维和可溶性糖显著减少。首次提出确定梨紧凑型基本指标为新梢顶端木质部中木质纤维密度低于1 300个.mm-2,木薄壁细胞密度高于1 700个.mm-2,导管密度低于270个.mm-2;紧凑型梨树节间变短可能是赤霉素(GA3)含量减少引起的,顶端的膨大生长等现象则可能是细胞分裂素积累引起的。
关键词(KeyWords)： 梨;紧凑型;解剖结构;内源激素
基金项目(Foundation): 国家科技支撑项目(2008BAD92B07,2006BAD13B06-1);; 国家863课题(2006BAD13B06-1);; 国家科技成果转化课题(2007GB23260389);; 中央级公益性科研院所基本科研业务费专项
作者(Author): 姜淑苓;陈长兰;王斐;欧春青;王西成;贾敬贤;马力;
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参考文献(References)：
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