MORPHOLOGY AND CHARACTERIZATION OF ACTINOBACTERIA ISOLATES ON SHALLOT
(ALLIUM ASCALONICUM) IN TANAH DATAR REGENCY
Reza Sumarta Ilyas1*, Yenny Liswarni1, Yulmira Yanti1
1Program Studi Proteksi Tanaman Fakultas Pertanian Universitas Andalas 25163
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Diterima / Disetujui
ABSTRACT
Shallots are very important horticultural commodities. The aim of the study was to determine the morphological and physiological characterization of actinobacteria from the roots of shallots in the Tanah Datar Regency. This research is experimental with selected random method (Purposive Random Sampling). 3 villages were selected for each district, 3 jorongs were selected for each village and one field was chosen for each jorong, 3 soil samples were taken on land that had healthy shallot root criteria around the diseased shallot plants with 3-5 weeks of onion plant age. after planting. The results showed that there were 6 isolates of actinobacteria that had been characterized morphologically and physiologically with isolate codes, namely TDTS -6 ISP, TDHB -7 ISP, TDBS -7 ISP, TDSB -6 ISP, TDKB -6 ISP and TDTB -6 ISP. For morphological testing, actinobacteria were found with different mycelium colors. Meanwhile, from the physiological characterization of all isolates found after the hypersensitivity reaction test was carried out, the results were in the form of a negative reaction. This negative reaction indicates that the actinobacteria are not pathogenic. The actinobacteria found have potential as biological control agents.
Key words : Actinobacteria, shallots, characterization, tanah datar
