作物学报 ›› 2013, Vol. 39 ›› Issue (08): 1339-1344.doi: 10.3724/SP.J.1006.2013.01339
黄杰恒**,李威**,曲存民,刘列钊,徐新福,王瑞,李加纳*
HUANG Jie-Heng**,LI Wei**,QU Cun-Min,LIU Lie-Zhao,XU Xin-Fu,WANG Rui,LI Jia-Na*
摘要:
植物体内木质素的含量不仅与植物的抗病性有关,也与植物的抗倒伏性状密切联系。本试验以15个抗倒性等级不同的甘蓝型油菜品种为材料,分别在初花期和青荚期测定茎秆中部木质素含量,同时用qRT-PCR的方法分析了木质素代谢途径中6个关键基因PAL、4CL、C4H、CCR1、CCR2和CAD的表达量差异。结果表明,油菜茎秆木质素从初花期到青荚期平均增加了28%,抗倒性强的材料木质素增加最明显,达到33.5%;不同时期,不同抗倒伏性的油菜茎秆中部木质素含量差异均极显著;各基因表达量在两个时期间差异均显著或极显著,但在不同抗倒性材料间,只有基因PAL、4CL和CCR1表达量间差异显著;基因PAL的表达量与木质素含量相关性最强,4CL基因的表达量与其他关键酶基因表达量相关性最强。综上所述,木质素的合成积累由代谢途径中各个环节关键基因所共同决定,但基因PAL和4CL对木质素的代谢影响更明显。
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