Selection of cold tolerant somaclonal variant from Citrus sinensis cv. Jincheng and genetic stability evaluation of its cold tolerance

文献类型： 外文期刊

第一作者： Lin, DB

作者： Lin, DB;Yan, QS;Shen, DX

作者机构：

关键词： Citrus sinensis;somaclonal variant;cold tolerance;genetic stability;antioxygenase

期刊名称：ACTA BOTANICA SINICA （ 影响因子：0.599； ）

ISSN： 0577-7496

年卷期： 1999 年 41 卷 2 期

页码：

收录情况： SCI

摘要： Somaclonal tolerant cell line and its regenerants were obtained from suspension culture cells of nucellar calli in Circus sinensis (L.) Osbeck cl. Jincheng via gamma rag. mutagenesis and in vitro selection with concentrated hydroxyproline, which were cold tolerant at 1.4 degrees C and 2.4 degrees C more than the suspension cells of wild types respectively. The capability of enhanced cold tolerance in the variant plantlet L3-1 was genetically stable based on a three-year evaluation. There might be slight differences between their total DNA from leaves of L3-1 and the wild type according to the polymorphism between their total DNA RAPD patterns. Except proline accumulation either at the suspension cell or at the plantlet levels, antioxygenases SOD and CAT activities were stimulated much higher and MDA. contents much lower than the wild type after cold acclimation at the suspension cell levels, which indicated that physiological mechanism on the enhanced cold tolerance of the variant was very complex. Not only proline metabolism, but antioxygenases and some others were also involved in its enhancement process on cold hardiness.

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