Culturable bacteria in hydroponic cultures of moss Racomitrium japonicum and their potential as biofertilizers for moss production

Akio Tani, Motomu Akita, Haruhiko Murase, Kazuhide Kimbara

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The use of Racomitrium japonicum, a drought resistant bryophyte used for roof-greening, is gradually increasing. However, its utilization is hampered by slow growth rate. Here we isolated culturable bacteria from hydroponic cultivation samples to identify isolates that could promote moss growth. Most of the isolates belonged to Pseudomonas, Rhodococcus, and Duganella species. The isolates were biochemically characterized according to their type of interaction with plants, i.e., production of auxin, siderophores, or hydrogen cyanate, growth in the absence of an added nitrogen source, calcium phosphate solubilization, utilization of sugars, polymers, or aliphatic compounds, and antifungal activity. The isolates were applied to sterile protonemata and non-sterile adult gametophytes of R. japonicum to evaluate their effect on plant growth. Furthermore, we isolated fungi that inhibited moss growth. Our results suggest that the microbial community structure in hydroponic cultures is important to stabilize moss production and the isolates that promote moss growth have potential to be utilized as biofertilizers for moss production.

Original languageEnglish
Pages (from-to)32-39
Number of pages8
JournalJournal of Bioscience and Bioengineering
Volume112
Issue number1
DOIs
Publication statusPublished - Jul 1 2011

Keywords

  • Bryophytes
  • Plant-growth promotion
  • Plant-microbe interaction
  • Racomitrium japonicum
  • Roof greening

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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