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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제30권 제10호
- 발행연도
- 2020.1
- 수록면
- 1,500 - 1,509 (10page)
이용수
초록· 키워드
오류제보하기
Drought is a major abiotic factor and has drastically reduced crop yield globally, thus damaging the agricultural industry. Drought stress decreases crop productivity by negatively affecting crop morphological, physiological, and biochemical factors. The use of drought tolerant bacteria improves agricultural productivity by counteracting the negative effects of drought stress on crops. In this study, we isolated bacteria from the rhizosphere of broccoli field located in Daehaw-myeon, Republic of Korea. Sixty bacterial isolates were screened for their growth-promoting capacity, in vitro abscisic acid (ABA), and sugar production activities. Among these, bacterial isolates YNA59 was selected based on their plant growth-promoting bacteria traits, ABA, and sugar production activities. Isolate YNA59 highly tolerated oxidative stress, including hydrogen peroxide (H2O2) and produces superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) activities in the culture broth. YNA59 treatment on broccoli significantly enhanced plant growth attributes, chlorophyll content, and moisture content under drought stress conditions. Under drought stress, the endogenous levels of ABA, jasmonic acid (JA), and salicylic acid (SA) increased; however, inoculation of YNA59 markedly reduced ABA (877 ± 22 ng/g) and JA (169.36 ± 20.74 ng/g) content, while it enhanced SA levels (176.55 ± 9.58 ng/g). Antioxidant analysis showed that the bacterial isolate YNA59 inoculated into broccoli plants contained significantly higher levels of SOD, CAT, and APX, with a decrease in GPX levels. The bacterial isolate YNA59 was therefore identified as Variovorax sp. YNA59. Our current findings suggest that newly isolated drought tolerant rhizospheric Variovorax sp. YNA59 is a useful stress-evading rhizobacterium that improved droughtstress tolerance of broccoli and could be used as a bio-fertilizer under drought conditions.
목차
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참고문헌 (72)
참고문헌 신청
Boyer J / 2013 / The US drought of 2012 in perspective : A call to action / Glob. Food Secur 2:139~143
Hussain M / 2008 / Improving drought tolerance by exogenous application of glycinebetaine and salicylic acid in sunflower / J. Agron. Crop Sci 194:193~199
Kaya MD / 2006 / Seed treatments to overcome salt and drought stress during germination in sunflower (Helianthus annuus L.) / Eur. J. Agron. 24:291~295
Nonami H / 1998 / Plant water relations and control of cell elongation at low water potentials / J. Plant Res 111:373~382
Zhang X / 2018 / Effects of drought stress and water recovery on physiological responses and gene expression in maize seedlings / BMC Plant Biol 18:68
Hussain M / 2008 / Improving drought tolerance by exogenous application of glycinebetaine and salicylic acid in sunflower / J. Agron. Crop Sci 194:193~199
Kaya MD / 2006 / Seed treatments to overcome salt and drought stress during germination in sunflower (Helianthus annuus L.) / Eur. J. Agron. 24:291~295
Nonami H / 1998 / Plant water relations and control of cell elongation at low water potentials / J. Plant Res 111:373~382
Zhang X / 2018 / Effects of drought stress and water recovery on physiological responses and gene expression in maize seedlings / BMC Plant Biol 18:68
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