Vui lòng dùng định danh này để trích dẫn hoặc liên kết đến tài liệu này: https://dspace.ctu.edu.vn/jspui/handle/123456789/69643
Nhan đề: Isolation and indentification of indole acetic acid producing bacteria from the coats of Ben Tre and Tra Vinh provinces
Tác giả: Nguyen, Ngoc Lan
Vu, Van Dung
Nguyen, Thi Kim Lien
Nguyen, Kim Thoa
Do, Huu Nghi
Nguyen, Huy Hoang
Từ khoá: IAA producing bacteria
Marine
Marinobacter
Mameliella
C7
Halophile
Năm xuất bản: 2019
Tùng thư/Số báo cáo: Tạp chí Sinh học;Vol. 41, No. 04 .- P.55-67
Tóm tắt: Beneficial plant-growth-promoting bacteria (PGPB) have been reasonably applied to rescue crucial issue for agriculture by salinity soil. Observed most of PGPB was found in endophyte, rhizosphere and soil. Indole acetic acid (IAA)-producing bacteria could naturally stimulate and facilitate plant growth. The knowledge of IAA production and content of bacteria resident in the marine environment has been typically insufficient and limited to date. In recent: years, unwarrantable intrusions of sea water have been enlarged in the Mekong River Delta of Vietnam, threatening productive rice fields, local fruits, and cash crops. Therefore, finding PGPB in the coastal regions in the Mekong River Delta as a creative resource for sustainable agriculture is necessary and is a prompt challenge. In this study, IAA-producing bacteria from coastal regions of Ben Tre and Tra Vinh Provinces were isolated and adequately identified. Out of 202 bacterial isolates, 10 isolates showed the possible ability to produce IAA from L-tryptophan. These 10 isolates were objectively evaluated the capacity to produce IAA under 5% (w/v) NaCl in King B and marine broths. The results revealed that IAA production decreased in 5% NaCl, even though bacterial growth increased. These 10 IAA-producing bactcria were classified at the species level, Marinobacter hydrocarbonoclasticus, M. pelagius, M. daepoensis, and Mameliella phaeodactyli by 16S rRNA gene analysis. The most IAA producer in King’s B broth, the isolate C7, was investigated in more detail. The isolate C7 produced the maximum IAA amount (192.2 + 1.14 µg/ml) under the presence of 20 g/l yeast extract, 2 2/1 of L-tryptophan and 1% NaCl. The isolate C7 was able to grow at 1-17% (w/v) NaCl (optimum, 4%), but not in the absence of NaCl. indicating it is a moderate halophilic bacterium. This study highlighted the considerable ability to produce IAA of marine bacteria, which could be thoughtfully considered to use naturally as biofertilizers to promote plant growth in saline intrusion lands.
Định danh: https://dspace.ctu.edu.vn/jspui/handle/123456789/69643
ISSN: 0866-7160
Bộ sưu tập: Sinh học

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