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Effect of Lowtemperature on Preservation and Variation of Endogenous Hormones in Embryo of Fresh Walnut
Author(s): MA Yan-ping, LV Xin-gang, MA Hui-ling, FEI Zhao-xue
Pages: 134-
138
Year: 2013
Issue:
5
Journal: Northern Horticulture
Keyword: 低温; 贮藏效应; 内源激素; 鲜核桃;
Abstract: 以"辽宁4号"鲜核桃为试材,研究了常温(20±3)℃和低温(0±1)℃下核桃的贮藏效果,测定其胚芽中内源激素脱落酸(ABA)、赤霉素(GA3)、生长素(IAA)和玉米素核苷(ZR)的含量及其与ABA比值的变化规律。结果表明:鲜核桃在常温下20d萌发,5d开始发霉,低温下贮藏120d仍未发芽;低温贮藏的鲜核桃胚芽中ABA的较高含量,却极显著抑制了GA3、IAA、ZR的含量和w(IAA)/w(ABA)、w(ZR)/w(ABA)的比值,对w(GA3)/w(ABA)影响不显著。表明低温主要通过保持鲜核桃中较高的萌发抑制物质,抑制其萌发促进物质来实现对鲜核桃较好的贮藏效果。
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