【摘要】 从槟榔根际土壤和槟榔叶柄中分离细菌,测量它们对槟榔盆栽苗的促生能力。结果表明:筛选到的解淀粉芽孢杆菌菌株DC-7有着明显的促生效果,槟榔盆栽苗的株高、根长、茎粗和鲜重等指标均高于对照,且叶绿素含量、谷氨酰胺合成酶（GS）和谷氨酸合成酶（GOGAT）等指标均明显优于对照,DC-7菌株的LB发酵液上清中吲哚乙酸（IAA）含量为35.78±1.41ng·mL^-1,说明菌株DC-7的促生长作用可能来源于它的产IAA能力。更多还原

【Abstract】 Bacteria were isolated from the rhizosphere soil and leaf stalk of areca,and their growth-promoting ability to potted areca seedlings was measured.The results showed that the screened bacillus amyloliquefaciens DC-7 had obvious growth-promoting effect;the plant height,root length,stem diameter,and fresh weight of potted areca seedlings were higher than those of the control;and the chlorophyll content,glutamine synthetase （GS） and glutamate synthase （GOGAT） were significantly better than the control.The IAA content in the supernatant of LB fermentation broth of DC-7 strain was 35.78±1.41 ng·mL^-1,indicating that the growth-promoting effect of the strain DC-7 may be due to its IAA producing bility.更多还原