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生物碱参与阿魏种子休眠的调控

, PP. 882-886

Keywords: 阜康阿魏(Ferula,fukanensis,Shen.)')",阜康阿魏(Ferula&searchField=keyword">href="#">阜康阿魏(Ferula,fukanensis,Shen.),种子休眠,生物碱,萌发抑制物

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Abstract:

为揭示濒危植物阜康阿魏(FerulafukanensisShen.)种子休眠的成因,对阜康阿魏种子分别采用流水漂洗处理后的发芽试验、蒸馏水和NaHCO3溶液浸提液以及化学法提取生物碱中的小麦种子萌发实验,并观察蒸馏水和NaHCO3浸泡阿魏种子对介质pH的影响等,综合分析阿魏种子休眠的成因。流水浸洗处理5d和20d的发芽率分别为77%和85%以上,较对照(47%)有显著提高(P<0.01);NaHCO3浸提液对小麦种子萌发的抑制作用显著高于蒸馏水浸提液;用pH较高的NaHCO3溶液和蒸馏水浸泡阿魏种子,该介质的pH向8.0~8.3收敛;化学法提取生物碱对小麦发芽有显著抑制作用,当10g·(100mL)-1时抑制率达80%。实验结果显示,除脱落酸(ABA)外,还有生物碱在阿魏种子休眠的调控中起重要作用。

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