A highly efficient auxin-producing bacterial strain and its effect on plant growth

Abstract Background Various bacteria promote plant root growth in the rhizosphere, as a measure of securing and enlarging their ecological niche. These interactions are mediated by plant growth regulators (PGRs) such as auxin, and indole-3-acetic acid (IAA) is one of the physiologically active auxin...

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Autores principales:	Seunghye Park, A-Leum Kim, Yoon-Kyung Hong, Ji-Hwan Shin, Se-Hwan Joo
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Auxin Plant root growth promotion Plant-microbial interaction Biotechnology TP248.13-248.65 Genetics QH426-470
Acceso en línea:	https://doaj.org/article/a1c92da8228e4f2f8e13dc263c894c18
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spelling	oai:doaj.org-article:a1c92da8228e4f2f8e13dc263c894c182021-12-05T12:20:55ZA highly efficient auxin-producing bacterial strain and its effect on plant growth10.1186/s43141-021-00252-w2090-5920https://doaj.org/article/a1c92da8228e4f2f8e13dc263c894c182021-12-01T00:00:00Zhttps://doi.org/10.1186/s43141-021-00252-whttps://doaj.org/toc/2090-5920Abstract Background Various bacteria promote plant root growth in the rhizosphere, as a measure of securing and enlarging their ecological niche. These interactions are mediated by plant growth regulators (PGRs) such as auxin, and indole-3-acetic acid (IAA) is one of the physiologically active auxin. In this study, we isolated an unusual bacterial strain from food process waste with high efficiency and demonstrated its effects on plant rooting and early-stage growth. Results The efficiency of this bacterial strain in producing IAA was 16.6 mg/L/h in Luria-Bertani broth containing 0.05% l-tryptophan (Trp) at room temperature (24 ± 2 °C). Its IAA production was highly dependent on the presence of precursor, Trp. This bacterium was identified as Ignatzschineria sp. by 16S rDNA sequencing. Its bacterial culture supernatant (BCS) enhanced plant root initiation, root growth, and plant growth in the early stages. The root mass formed BCS-treated in apple mint cuttings was twofold of that formed in the control. The root number and length were 46% and 18% higher, respectively, in BCS-treated chrysanthemum cuttings than in the control. Conclusions These results show that the BCS of Ignatzschineria sp. CG20001 isolate obtained in this study can be used for agricultural applications. In addition, the novelty of this strain makes it a valuable genetic resource for biotechnological applications.Seunghye ParkA-Leum KimYoon-Kyung HongJi-Hwan ShinSe-Hwan JooSpringerOpenarticleAuxinPlant root growth promotionPlant-microbial interactionBiotechnologyTP248.13-248.65GeneticsQH426-470ENJournal of Genetic Engineering and Biotechnology, Vol 19, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Auxin Plant root growth promotion Plant-microbial interaction Biotechnology TP248.13-248.65 Genetics QH426-470
spellingShingle	Auxin Plant root growth promotion Plant-microbial interaction Biotechnology TP248.13-248.65 Genetics QH426-470 Seunghye Park A-Leum Kim Yoon-Kyung Hong Ji-Hwan Shin Se-Hwan Joo A highly efficient auxin-producing bacterial strain and its effect on plant growth
description	Abstract Background Various bacteria promote plant root growth in the rhizosphere, as a measure of securing and enlarging their ecological niche. These interactions are mediated by plant growth regulators (PGRs) such as auxin, and indole-3-acetic acid (IAA) is one of the physiologically active auxin. In this study, we isolated an unusual bacterial strain from food process waste with high efficiency and demonstrated its effects on plant rooting and early-stage growth. Results The efficiency of this bacterial strain in producing IAA was 16.6 mg/L/h in Luria-Bertani broth containing 0.05% l-tryptophan (Trp) at room temperature (24 ± 2 °C). Its IAA production was highly dependent on the presence of precursor, Trp. This bacterium was identified as Ignatzschineria sp. by 16S rDNA sequencing. Its bacterial culture supernatant (BCS) enhanced plant root initiation, root growth, and plant growth in the early stages. The root mass formed BCS-treated in apple mint cuttings was twofold of that formed in the control. The root number and length were 46% and 18% higher, respectively, in BCS-treated chrysanthemum cuttings than in the control. Conclusions These results show that the BCS of Ignatzschineria sp. CG20001 isolate obtained in this study can be used for agricultural applications. In addition, the novelty of this strain makes it a valuable genetic resource for biotechnological applications.
format	article
author	Seunghye Park A-Leum Kim Yoon-Kyung Hong Ji-Hwan Shin Se-Hwan Joo
author_facet	Seunghye Park A-Leum Kim Yoon-Kyung Hong Ji-Hwan Shin Se-Hwan Joo
author_sort	Seunghye Park
title	A highly efficient auxin-producing bacterial strain and its effect on plant growth
title_short	A highly efficient auxin-producing bacterial strain and its effect on plant growth
title_full	A highly efficient auxin-producing bacterial strain and its effect on plant growth
title_fullStr	A highly efficient auxin-producing bacterial strain and its effect on plant growth
title_full_unstemmed	A highly efficient auxin-producing bacterial strain and its effect on plant growth
title_sort	highly efficient auxin-producing bacterial strain and its effect on plant growth
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/a1c92da8228e4f2f8e13dc263c894c18
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A highly efficient auxin-producing bacterial strain and its effect on plant growth

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