Improvement of biological control capacity of Paenibacillus polymyxa E681 by seed pelleting on sesame |
| |
| Institution: | 1. Department of Agricultural Biology and Environmental Sciences, College of Agriculture and Life Sciences, Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, GyeongNam 660-700, Republic of Korea;2. Laboratory of Microbial Genomics, Systems Microbiology Research Center, KRIBB, Daejeon 305-806, Republic of Korea;1. Department of Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park 5042, South Australia, Australia;2. Soil Biology and Diagnostics, South Australian Research and Development Institute, Urrbrae 5064, South Australia, Australia;1. National Center for Natural Product Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, MS 38677, United States;2. Agricen Sciences, 801 Hwy 377 S, Pilot Point, Texas 76258, United States;3. Department of Biomolecular Sciences, School of Pharmacy, The University of Mississippi, University, MS 38677, United States;1. Department of Agricultural and Food Sciences, Alma Mater Studiorum - University of Bologna, Bologna, 40127, Italy;2. USDA-ARS, Biological Control of Pests Research Unit, Stoneville, MS, 38776, USA;3. USDA-ARS, Southern Insect Management Research Unit, Stoneville, MS, 38776, USA;4. Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, MN, 55455, USA |
| |
| Abstract: | Sesame is an important vegetable crop for the production of oil in Korea. The main obstacle of sesame cultivation is the occurrence of damping-off diseases and wilt caused by a complex of soil-borne pathogens in fields cultivated for two or more successive years. To protect sesame seedlings against these diseases, Paenibacillus polymyxa E681, a plant growth-promoting rhizobacterium (PGPR) previously shown to suppress disease incidence and promote growth on cucumber and pepper in the greenhouse and field experiments, was evaluated for its capacity for biological control and growth promotion in vitro and in situ. Seed treatment with strain E681 alone did not show consistent protection. Therefore, seed pelleting with strain E681 was attempted to increase the seed size and improve the stability and effectiveness of biocontrol capacity by strain E681. Through screening of pelleting materials, a combination of clay and vermiculite was selected for further experiments to enhance seed germination and root colonization of strain E681 on sesame. In greenhouse trials, formulations of strain E681 reduced disease incidence in disease-conducive soil. In the field, pelleting of sesame seeds with strain E681 significantly reduced pre- and post-emergence damping-off compared to the non-treated or pelleting alone controls; pelleting also promoted the plant growth and the grain yield. Furthermore, the efficacy of strain E681 for biological control and plant growth promotion was improved by sesame seed pelleting compared to the treatment with strain E681 alone. Hence, the application of strain E681 via seed pelleting offers potential to overcome some of the problems associated with successive years of sesame cultivation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
