Induction of plant resistance against soybean stunt virus using some formulations of Pseudomonas aeruginosa
2011
Khalimi, K. | Suprapta, D. N., Udayana, Univ. JI.PB, Sudirman, Denpasar Bali (Indonesia). Lab. of Biopesticide.
The efficacy of Pseudomonas aeruginosa formulations in inducing plant growth and systemic resistance (ISR) on soybean against infection of Soybean stunt virus (SSV) was evaluated under greenhouse conditions. P.aeruginosa isolate PaJ was formulated in the forms of powder, liquid, gel, compost and capsule. Some growth parameters such as maximum plant height, fresh and dry weight of shoot, fresh and dry weight of root, and dry weight of 1,000 seeds were observed. Virus concentration and disease incidence were determined using DAS-ELISA. Results of this study showed that application of P.aeruginosa formulations significantly increased the plant growth. The maximum plant height, fresh and dry weight of shoot, fresh and dry weight of root, and the dry weight of `1,000 seeds on treated plants were significantly higher than those of un-treated control plants according to the Duncan's multiple range test (P0.05). Disease incidence on treated plants ranged between 15% to 80%, while most (90%) of the untreated plants were infected. Peroxidase activity on treated plants increased by 4.89 to 6.49 times compared with the un-treated plants. These results suggested that application of P. aeruginosa could increase the resistance of soybean against SSV, promote and increase the plant growth and the yield. Hence, can be considered as one of the measures to control SSV on soybean.
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