中国中药杂志

2010, v.35(24) 3255-3259

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铝处理对桔梗种子萌发和幼苗生理的影响
Effect of seed soaking with aluminum on seed germination and seedling physiology of Platycodon grandiflorum

祝丽香;王建华;房信胜;王勇;郝俊凯;马伟伟;焦天颖;
ZHU Lixiang,WANG Jianhua,FANG Xinsheng,WANG Yong,HAO Junkai,MA Weiwei,JIAO Tianying(College of Agronomy,Shandong Agricultural University,Tai′an 271018,China)

摘要(Abstract):

目的:研究铝胁迫对桔梗种子萌发和幼苗生理指标的影响。方法:用不同浓度铝溶液浸种处理白花桔梗和紫花桔梗种子24 h后,于光照培养箱内培养。结果:考察发芽率、发芽指数和活力指数等指标,总趋势是铝毒害性与其浓度成正比,紫花桔梗种子对铝毒的耐受性比白花桔梗种子稍强;检测桔梗幼苗细胞的电解质渗透率、丙二醛含量、POD活性、脯氨酸和可溶性糖含量,与处理浓度高低有相关性。结论:白花桔梗和紫花桔梗对铝毒的耐受性存在一定差异,以紫花桔梗耐铝性高于白花桔梗。
In order to study the effect of seed soaking with different aluminum solution on seed germination and seedling physiological characteristics of Platycondon grandiflorum,two P.grandiflorum varieties′seed(the white flower and the purple flower) were soaked in Al3+ solution with different concentrations(0,10,100,250,500,750 and 1 000 mg·L-1) for 24 h,then germinated in illumination incubator.Results showed that the aluminum toxicity on the trends of the germination rate,germination index and vigor index was positive associated with its concentration,and the Al tolerance of the purple was slightly greater than that of the white.There were some relationships between the physiological indices,which were the leakage rate of electrolyte,the malonaldehyde(MDA)content,the activities of peroxidase(POD) and superoxide dismutase(SOD),the free praline(Pro) and the soluble sugar contents,with the concentrations of Al.It was suggested that there was AI tolerance difference between the two P.grandiflorum varieties: the purple flower was greater than the white.

关键词(KeyWords): 铝;桔梗;种子萌发;幼苗生理
aluminum;Plantycodon grandiflorum;seed germination;seedling physiology

Abstract:

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基金项目(Foundation): 国家科技支撑计划项目(2006BA106A12-09)

作者(Author): 祝丽香;王建华;房信胜;王勇;郝俊凯;马伟伟;焦天颖;
ZHU Lixiang,WANG Jianhua,FANG Xinsheng,WANG Yong,HAO Junkai,MA Weiwei,JIAO Tianying(College of Agronomy,Shandong Agricultural University,Tai′an 271018,China)

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