Characterization of sponge-associated actinobacteria with potential to promote plant growth on tidal swamps

  • Dwi Retnowati Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia.
  • Dedy Duryadi Solihin Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia.
  • Munif Ghulamahdi Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Bogor, Indonesia.
  • Yulin Lestari | yulinlestari@gmail.com Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor; Tropical Biopharmaca Research Center, Bogor Agricultural University, Bogor, Indonesia.

Abstract

Tidal swamps have become one of the highlighted topics in agricultural land development. Rice productivity in a tidal swamp is still low due to the high concentration of Fe, Al, and low pH. Siderophore-producing bacteria were known to alleviate the toxicity of heavy metals for plants. However, the potential of sponge-associated actinobacteria has been rarely reported in siderophore production. This work aimed to characterize the sponge-associated actinobacteria based on their tidal swamps characters and their potency to produce plant growth promoter on stressful tidal swamp imposed characters. The in vitro assay showed that, at the presence of Fe and Al, Car21t isolate produced a dry weight of mycelium reaching up to 289 mg and 204 mg in Yeast Malt Extract medium, respectively. Interestingly, all isolates were able to grow in relatively high salinity condition (7%). Indeed, under stress condition, inoculum of five actinobacteria isolates could produce Indole Acetic Acid and siderophore. These experimental results suggested that all potential isolates provided beneficial effects on the host plant, as evidenced by the rise of root length (9.86%), shoot length (9.44%), and root number (13.93%). Subsequently, our experimental data also indicated that these potential isolates belonged to the genus Streptomyces.

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Published
2019-09-26
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Section
Original Articles
Supporting Agencies
Bogor Agricultural University, Indonesia
Keywords:
Plant growth promoter, Sponge-associated actinobacteria, Tidal swamps characters
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How to Cite
Retnowati, D., Solihin, D., Ghulamahdi, M., & Lestari, Y. (2019). Characterization of sponge-associated actinobacteria with potential to promote plant growth on tidal swamps. Journal of Biological Research - Bollettino Della Società Italiana Di Biologia Sperimentale, 92(2). https://doi.org/10.4081/jbr.2019.8191