摘要
20 0 0～ 2 0 0 2年 ,先后对辽宁省 14个玉米主栽品种进行了根系内主要细菌种群分析 .结果表明 ,玉米内生细菌的主要种群为芽孢杆菌属 (Bucillusspp ) ,此外还包括肠杆菌属、沙雷氏杆菌属、假单胞菌属、黄单胞菌属和棍状杆菌属 .其中Bacillus分布最广 ,已鉴定出 8个种 ,包括枯草芽孢杆菌、巨大芽孢杆菌、蜡状芽孢杆菌、地衣芽孢杆菌、炭疽芽孢杆菌、蕈状芽孢杆菌、短小芽孢杆菌、环状芽孢杆菌 .Bacillusspp 总量占根系内生细菌总量比苗期和成株期分别为 75 5 %和 76 6 % .内生细菌在不同玉米品种和不同生育期之间存在程度不同的差异 .研究发现 ,品种的遗传背景与其内生细菌的种类和数量显著相关 .
In 2001～2002,14 maize cultivars in Liaoning Province were used for the analysis of their entophytic bacteria population.The entophytic bacteria strains with a higher frequency in maize roots were Bacillus spp.,Enterobacter spp.,Serratia spp.,Pseudomonas spp.,Xanthomonas spp.,Clavibacter spp.,Bacillus spp.,Enterobacter spp.and Serratia spp.Comparatively,Bacillus spp.was the most prevalent entophytic bacterium,including 8 species,B.subtilis,B.megaterium,B.cereus,B.licheniformis,B.anthracis, B.mycoides ,B.pumilus and B.circulans,and with an average isolation frequency of 75.5% at seedling stage and 77.6% at adult stage.There existed significant differences in the population and dynamics of endophytic bacteria among maize cultivars and growth periods,and a significant correlation was found between maize genetic background and entophytic bacteria population.
出处
《应用生态学报》
CAS
CSCD
2004年第8期1344-1348,共5页
Chinese Journal of Applied Ecology
基金
国家"十五"科学技术攻关资助项目 ( 2 0 0 1BA5 0 90 40 5 )
关键词
玉米
内生细菌
种群
动态分析
遗传背景
Maize, Entophytic bacteria, Population, Dynamic analysis, Genetic background.
