Phylloplane of a plant constitutes an important habitat for a variety of microbes many of which play important roles in plant growth. The objective of this study was to compare plant growth promoting (PGP) phylloplane bacteria of three commercially popular wheat varieties, namely Sehar, Faisalabad and Lasani, in order to assess whether better wheat variety harbours better PGP bacteria that play part in its superior yield. Phylloplane bacteria were isolated from the three wheat varieties thrice during the plant growth. The bacterial load increased with the growing season and Sehar variety carried maximum bacterial load (CFUg⁻¹ 1.1 × 10⁹). Succession of bacterial community was also observed during the plant growth. Isolates belonging to Sehar phylloplane produced auxin in highest amounts (52.95 µg ml⁻¹) during second sampling when plant was showing rapid growth. Many isolates from all three varieties fixed nitrogen, solubilized phosphates and some isolates also produced hydrogen cyanide. The results clearly indicated that the beneficial bacteria associated with phylloplane of better yielding variety were showing better PGP abilities when compared to their counterparts on low yielding varieties. Isolates exhibiting best PGP profiles were identified as Bacillus, Microbacterium, Acinetobacter, Proteus, Psychrobacter, Pseudomonas, Streptomyces and Kineococcus species through 16S rRNA gene sequencing.

植物的叶架是各种微生物的重要栖息地，其中许多微生物在植物生长中起重要作用。这项研究的目的是比较三种商业上流行的小麦品种，即Sehar，Faisalabad和Lasani的植物生长促进（PGP）叶面细菌，以评估更好的小麦品种是否具有更好的PGP细菌，而PGP细菌在其优异的产量中发挥了作用。在植物生长期间，从三个小麦品种中三次分离出叶平面细菌。细菌载量随生长期的增加而增加，Sehar品种的细菌载量最大（CFUg ^-1 1.1×10 ⁹）。在植物生长期间也观察到细菌群落的演替。当植物显示出快速生长时，第二次采样期间，属于Sehar叶飞机的分离菌产生的生长素最高（52.95 µg ml ^-1）。这三个品种的许多分离物都固定了氮，可溶的磷酸盐，有些分离物也产生了氰化氢。结果清楚地表明，与低产量品种的有益细菌相比，与高产量品种的叶平面相关的有益细菌表现出更好的PGP能力。株表现出最好的PGP轮廓被确定为芽孢杆菌，微杆菌，不动杆菌，变形杆菌，嗜冷，假单胞菌，链霉菌和动球菌种通过16S rRNA基因测序。