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WARNITA WARNITA
Department of Agronomy, Faculty of Agriculture, Universitas Andalas. Padang 25163, West Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Characterizations of endophytic Bacillus strains from tomato roots as growth promoter and biocontrol of Ralstonia solanacearum YULMIRA YANTI; WARNITA WARNITA; REFLIN REFLIN; CHAINUR RAHMAN NASUTION
Biodiversitas Journal of Biological Diversity Vol. 19 No. 3 (2018)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d190320

Abstract

Yanti Y, Warnita, Reflin, Nasution CR. 2018. Characterizations of endophytic Bacillus strains from tomato roots as growth promoter and biocontrol of Ralstonia solanacearum. Biodiversitas 19: 906-911. Bacterial wilt caused by Ralstonia solanacearum is the most damaging vascular pathogens in tomato and many other crops in tropical, subtropical and warm temperate areas of the world limiting its production. Biological agents such as Plant growth Promoting Rhizobacteria (PGPR) is considered as a potential biological control agent for the suppression of plant diseases such as bacterial wilt. Bacillus spp. are one of the most potential genera of PGPR group used for controlling pathogens and promoting plant growth because of their spore-forming ability which increases their adaptation to the environment. The aims of the research were to isolate Endophytic Bacillus isolates, to characterize its ability as plant growth promoter and pathogen controller, and to identify its molecular genetic using 16S rRNA. Bacillus strains were isolated from healthy tomato roots. All Bacillus spp. strains acquired from isolation were then screened directly on plants in completely randomized design experiments with 3 replications. All potential strains were screened and identified using 16S rRNA with 27F and 1492R primers. Results showed that out of 15 obtained isolates, 6 of them showed a good ability to both promote growth and control R. solanacearum. All isolates were identified as B. Pseudomycoides strain NBRC 101232, B. cereus strain CCM 2010, B. toyonensis strain BCT-7112, B. anthracis strain ATCC 14578, B. cereus strain JCM 2152 and B. cereus ATCC 14579.
Short Communication: Development of selected PGPR consortium to control Ralstonia syzygii subsp. indonesiensis and promote the growth of tomatoYanti Y, Warnita, Reflin. 2018. Short Communication: Development of selected PGPR consortium to control Ralstoni YULMIRA YANTI; WARNITA WARNITA; REFLIN REFLIN; HASMIANDY HAMID
Biodiversitas Journal of Biological Diversity Vol. 19 No. 6 (2018)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d190612

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Yanti Y, Warnita, Reflin. 2018. Short Communication: Development of selected PGPR consortium to control Ralstonia syzygii subsp. indonesiensis and promote the growth of tomato. Biodiversitas 19: xxxx. A microbial consortium is a group of different species of microorganisms and acts as a community. Combinations of biocontrol strains are expected to have a better result to suppress multiple plant diseases. Our previous research had selected four plant growth promoting rhizobacteria (PGPR) strains from chili (B. pseudomycoides strain NBRC 101232, B. cereus strain CCM 2010, Bacillus toyonensis strain BCT-7112, Serratia nematodiphila strain DZ0503SBS1) and three strains from tomato (Bacillus pseudomycoides strain NBRC 101232, Bacillus toyonensis strain BCT-7112, Bacillus thuringiensis strain ATCC 10792 ) which had ability to promote growth and control Ralstonia syzygii subsp. indonesiensis indigenously. The strains were used in the development of PGPR consortiums to increase their ability for biocontrol agent of Ralstonia syzigii subsp. indonesiensis and promoting the growth of tomato. Results showed that not all strains had good compatibility to grow together. Ten consortiums were developed based on their compatibilities. All consortiums exhibited the capability to reduce bacterial wilt disease development and also promote the growth of tomato. The consortium consisted of Serratia nematodiphila strain DZ0503SBS1, B. cereus strain CCM 2010, Bacillus aryabhattai strain B8W22 and Bacillus cereus strain IAM 12605 resulted in the best ability to reduce disease development and promote growth and yield of tomato.
Co-Authors CHAINUR RAHMAN NASUTION HASMIANDY HAMID REFLIN REFLIN REFLIN REFLIN Yulmira Yanti