摘要
以大豆耐铝基因型"吉林70"为材料,采用液体培养的方法研究了铝胁迫下大豆根系柠檬酸分泌规律。结果表明:铝胁迫可使大豆根系分泌柠檬酸以抵抗铝的毒害,且柠檬酸的大量分泌是在铝胁迫6 h之后,说明其分泌方式应属于模式Ⅱ;分根试验表明,在同一株大豆幼苗中,铝只毒害与其接触的根,而对其他根基本不产生毒害。
Aluminum toxicity is one of the most significant factors inhibiting plant growth and crop production in acid soils.The root growth is hurt by Al stress and absorbability of water and nutrient decreased,so the growth and development of plant are inhibited.In the present study,with solution culture,Jilin 70 was selected as the Al-tolerant cultivars for the research of effect of Al on the citrate secretion of soybean seedling.The results were as follows： Exclusion of citrate acid from soybean roots could be used to chelating Al and thus minimize the impact of Al toxicity.Large quantities of citrate secretion from soybean roots were found to occur after 6-h Al stress.Therefore,the former was identified as pattern Ⅱ;the results of root manipulation experiments revealed that only the Al-treated root portions were hurt.This injury was not observed in the roots of the same plant,which received only calcium solution without Al.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2010年第2期177-180,共4页
Journal of Jilin Agricultural University
基金
国家自然科学基金项目(30671241)
关键词
大豆
铝毒
柠檬酸
分泌
soybean
Al toxicity
citric acid
secretion
