华南农业大学学报Issue(3)：35-40,6.
GA3、ABA和6-BA对大豆根系生长的影响
Effects of GA3, ABA and 6-BA on soybean,Glycine max L.Merrill, root growth and development
摘要
Abstract
[Objective]This experiment was conducted to explore effects of different concentrations of GA3 , ABA, and 6-BA on soybean root growth , which could provide a theoretical basis for a further con-trol of soybean root architecture through phytohormone .[Method]The seedlings of soybean cultivar“HN89” were treated with 0.05, 0.50, 1.00, and 5.00 μmol· L-1 gibberellin (GA3), abscisic acid ( ABA) and cytokinin (6-BA) respectively for 4 days, then root morphological parameters were quanti-fied and analyzed .[Result and conclusion]The results showed that 0.05 μmol· L-1 GA3 promoted the total root length of soybeans , but increasing GA 3 concentration would constrain primary root and lateral root growth, which decreased the total root length .GA3 decreased average root diameters , hence resulting in fine roots.0.05 μmol· L-1 ABA did not affect the soybean root growth , while increasing ABA con-centration higher than 0.5μmol· L-1 inhibited primary root and lateral root growth , decreasing the total root length , and slightly increasing average root diameters .6-BA significantly constrained the soybean root growth and development , for instance , it inhibited primary root elongation , lateral rooting , and the total root length , but it promoted average root diameter , resulting in thick roots .These results indicated that different phytohormones or similar phytohormone with different concentrations can control soybean root architecture by controlling primary roots and lateral roots growth in different ways .关键词
大豆/GA3/ABA/6-BA/根系/生长发育Key words
soybean/GA3/ABA/6-BA/roots/growth and development分类
农业科技引用本文复制引用
李欣欣,廖红,赵静..GA3、ABA和6-BA对大豆根系生长的影响[J].华南农业大学学报,2014,(3):35-40,6.基金项目
国家自然科学基金青年基金 （）
