102西北农林科技大学学报(自然科学版)第37卷

代谢极显著相关,其机理尚不清楚。

根据3种多胺的代谢途径并结合研究结果分析认为,水分胁迫诱使番茄幼苗Put的合成酶ADC和ODC活性增加,合成的Put增多,而Put可转化为Spd,并进一步转化为Spm,致使Spd和Spm含量增

变化及其与玉米耐旱性的关系[J].东北农业大学学报,2002,

33(4):3452352.

SongFB,DaiJY.Relationshipbetweenchangesofethylenereleaseandpolyaminescontentinmaizeleavesanddrought2tol2eranceinmaizeunderwaterstress[J].JournalofNortheastAgriculturalUniversity,2002,33(4):3452352.(inChinese)[7]　胡炳义,牛明功,王启明,等.渗透胁迫与大豆幼苗叶片多胺含

加,二者含量增加反馈致其氧化酶PAO活性增高,

3种多胺处于动态平衡中,共同缓解番茄受到的水分胁迫。

综上所述,水分胁迫下番茄幼苗多胺代谢活跃,且不同胁迫水平下多胺代谢间差异显著,多胺代谢与番茄抗旱性间关系密切,有关多胺代谢的信号传递及代谢物的运输机制有待进一步研究。[参考文献]

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