Growth Increase in the Herbaceous Plant Centella asiatica by the Plant Growth-Promoting Rhizobacteria Priestia megaterium HyangYak-01

Hyung Woo Jo, Kyeongmo Lim, Jerald Conrad Ibal, Min Chul Kim, Hye Been Kim, Chaeyun Baek, Young Mok Heo, Haeun Lee, Seunghyun Kang, Dong Geol Lee, Jae Ho Shin

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Centella asiatica is a traditional herbaceous plant with numerous beneficial effects, widely known for its medicinal and cosmetic applications. Maximizing its growth can lead to beneficial effects, by focusing on the use of its active compounds. The use of plant growth-promoting rhizobacteria (PGPR) is known to be an alternative to chemical fertilizers. In this study, we used the PGPR Priestia megaterium HY-01 to increase the yield of C. asiatica. In vitro assays showed that HY-01 exhibited plant growth-promoting activities (IAA production, denitrification, phosphate solubilization, and urease activity). Genomic analyses also showed that the strain has plant growth-promoting-related genes that corroborate with the different PGP activities found in the assays. This strain was subsequently used in field experiments to test its effectiveness on the growth of C. asiatica. After four months of application, leaf and root samples were collected to measure the plant growth rate. Moreover, we checked the rhizosphere microbiome between the treated and non-treated plots. Our results suggest that treatment with Hyang-yak-01 not only improved the growth of C. asiatica (leaf length, leaf weight, leaf width, root length, root width, and chlorophyll content) but also influenced the rhizosphere microbiome. Biodiversity was higher in the treated group, and the bacterial composition was also different from the control group.

Original languageEnglish
Article number2398
JournalPlants
Volume12
Issue number13
DOIs
StatePublished - Jul 2023

Keywords

  • biofertilizer
  • Centella asiatica
  • microbiome
  • plant growth-promoting activity
  • Priestia megaterium

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