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多胺氧化酶活性及木质素沉积与菊花花芽分化的关系

DOI: 10.7668/hbnxb.2014.03.030, PP. 164-169

Keywords: 菊花,花芽分化,多胺氧化酶,木质素

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Abstract:

以菊花神马为材料,研究了外源亚精胺(Spermidine,Spd)和多胺合成抑制剂D-精氨酸(D-Arginine,D-Arg)对花芽分化阶段根和叶片中多胺氧化酶(PAO)、二胺氧化酶(DAO)、过氧化物酶(POD)、过氧化氢酶(CAT)、过氧化氢(H2O2)和木质素含量的影响。结果显示,根和叶片PAO、DAO活性和木质素含量都是Spd>CK>D-Arg。外源Spd显著促进了花芽分化阶段多胺氧化酶活性和木质素的合成;D-Arg抑制了花芽分化,降低了多胺氧化酶活性及木质素的合成。结果表明,短日照条件下,多胺可能通过影响多胺氧化酶活性及其产物H2O2浓度影响木质素的合成,从而调控菊花的花芽分化进程。

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