The present study has been designed to identify the impact of root exudate components on the profile of volatile organic compounds (VOCs) produced by two rhizospheric Pseudomonas spp. For this, selected organisms were cultured in presence of tomato root extract or organic acids or sugars. From the culture extract, detection and identification of VOCs were carried out by GC-MS. Results of the study revealed the presence of five different compounds with antibacterial and two compounds with plant growth enhancing property in the crude extract from Pseudomonas sp. K6 and six different plant growth promoting compounds from Pseudomonas monteilii. These findings suggest the likely ability of these two isolates to get induced and release more plant beneficial VOCs especially gibberellin and salicylic acid at the rhizosphere region in presence of organic acids and sugars of plant exudome. The results further highlight the potential application of supplementation with root exudate components on functional enhancement of PGPR and thereby improved agricultural productivity.

本研究旨在确定根分泌物成分对由两个根际假单胞菌产生的挥发性有机化合物（VOC）的影响。为此，在番茄根提取物或有机酸或糖存在下培养选定的生物。从培养物提取物中，通过GC-MS进行VOC的检测和鉴定。研究结果表明，假单胞菌属粗提物中存在五种不同的具有抗菌作用的化合物和两种具有增强植物生长特性的化合物。蒙特卡洛假单胞菌的K6和六种不同的植物生长促进化合物。这些发现表明，在存在植物渗液的有机酸和糖存在的情况下，这两种分离物可能具有诱导能力，并能在根际区域释放更多的植物有益VOC，尤其是赤霉素和水杨酸。结果进一步突出了补充根系分泌物成分在PGPR功能增强上的潜在应用，从而提高了农业生产力。