Effect of foliar application of antibiotics and gibberellic acid on the rhizosphere microflora of pea,infected withVerticillium dahliae |
| |
Authors: | P Ramarao I Isaac |
| |
Institution: | (1) Department of Botany and Microbiology, University College, Swansea, UK;(2) Present address: Department of Botany, Osmanie University, Hyderabad 7, India |
| |
Abstract: | A study was made of the effects of foliar spray of bacitracin, chloramphenicol and gibberellic acid on the rhizosphere microflora
of pea seedlings (Pisum sativum L.) infected withVerticillium dahliae. The antibiotics increased fungus and actinomycete counts and reduced the bacterial populations in the rhizosphere. Gibberellic
acid at 10 ppm concentration reduced all three groups of microorganisms while at 100 ppm fungi and actinomycetes increased
slightly. Invariably the rhizosphere effect was as follows: bacteria > fungi > actinomycetes. Foliar sprays also affected
the percentage occurrence of particular genera of fungi in the rhizosphere; for example,Trichoderma spp. were stimulated by all the treatments, the maximum being with 10 ppm gibberellic acid, even though the total fungus
count was reduced. The disease severity was markedly reduced by foliar sprays. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|