The plant growth promotor auxin (IAA) production ability in Arthrospira massartii – ARH strain isolated from Vietnam…

Cyanobacteria are a group of photoautotrophic prokaryotes which have the ability to biosynthesize plant growth regulators, especially Indole-3-acetic acid (IAA), and have not been focused on research yet in Vietnam. In this study, Arthrospira massartii (ARH strain) – a planktonic cyanobacterial strain isolated from a freshwater lake in Hue City, Thua Thien Hue Province, Vietnam – is showing good growth ability under an artificial culture condition with the maximum cell density of 58.44 x 10⁴ cells/mL and the highest total IAA content of 18.62 µg/mL. This ARH strain also showed potential for IAA production even in the absence of L-tryptophan in the culture medium. The content of L-tryptophan supplemented with 600 µg/mL was the best for extracellular and intracellular IAA biosynthesis in Arthrospira massartii – ARH strain. ARH cyanobacterial extract has also shown to have a positive effect on the budding shoot multiplication and rooting of tissue-cultured ginger plants. Research results have demonstrated the potential to apply the extract of cyanobacteria Arthrospira massartii – ARH in the field of plant tissue culture to partially replace plant growth promoters and cultivation stimulants.

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Citation: Nguyen Thi Thu Lien, Le Thi Tuyet Nhan, Ho Nhat Quang, Phan Thi Thao Nguyen, Truong Thi Bich Phuong, Dang Thi Thanh Loc, Le Van Tuan, Hoang Tan Quang (2022) The plant growth promotor auxin (IAA) production ability in Arthrospira massartii – ARH strain isolated from Vietnam and its potential applications. Plant Cell Biotechnology and Molecular Biology 23(1&2): 101-110.