Open AccessEndophytic bacterial consortia as biocontrol of purple blotch and plant growth promoters of shallots
Author(s) -
Zurai Resti,
. Warnita,
Yenny Liswarni
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/741/1/012009
Subject(s) - serratia marcescens , bacillus cereus , pseudomonas fluorescens , biology , bacillus subtilis , serratia , microbial inoculant , bacteria , microbiology and biotechnology , biological pest control , bacillus (shape) , horticulture , pseudomonas , inoculation , escherichia coli , genetics , gene , biochemistry
Endophytic bacteria have been reported to have roles as biocontrol agents and plant growth promoters. The application of endophytic bacteria in the form of mixed culture [consortia] will provide better effectiveness than when applied alone. This study aimed to obtain a consortium of endophytic bacteria that is effective as a biological control for purple blotch [ Alternariaporri ], promote the growth and yield of shallots. The research was arranged in a completely randomized design [CRD] consisting of 7 treatments with three replications. The consortium used was a mixture of two strains of Bacillus sp., two strains of B. cereus , two strains of Serratia marcescens, Bacillus subtilis, Azotobacter, Azospirillum , and P. fluorescens . The variables observed in this study included disease progression [incubation period, disease incidence, and disease severity], plant growth [number of leaves and plant height], and yield [fresh weight and dry weight of bulbs]. The results showed that the C consortium [ Bacillus sp. strain SJI, Bacillus sp. strain HI, Serratia marcescens strain ULG1E4 and Serratia marcescens strain JBIE3] and G consortium [ Bacillus sp. strain SJI, Bacillus sp. strain HI, Bacillus subtilis, Pseudomonas fluorescens, Serratia marcescens strain ULG1E4 and Serratiamarcescens strain JBIE3] were the best consortia in suppressing purple blotch disease, as well as in improving the growth and yield of shallots.