상위피인용논문
- 조회482
경북대학교, Government of Khyber Pakhtunkhwa
Muhammad Waqas1,2,†, Abdul Latif Khan1,3,†, Muhammad Kamran1, Muhammad Hamayun4, Sang-Mo Kang1, Yoon-Ha Kim1 and In-Jung Lee1,*
1 School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 702-701, Korea
2 Department of Agriculture Extension, Government of Khyber Pakhtunkhwa, Bunir 19290, Pakistan
3 Department of Botany, Kohat University of Science and Technology, Kohat 26000, Pakistan
4 Department of Botany, Abdul Wali Khan University, Mardan 23300, Pakistan
†These authors contributed equally to this work.
*Author to whom correspondence should be addressed.
Abstract
We isolated and examined two endophytic fungi for their potential to secrete phytohormones viz. gibberellins (GAs) and indoleacetic acid (IAA) and mitigate abiotic stresses like salinity and drought. The endophytic fungi Phoma glomerata LWL2 and Penicillium sp. LWL3 significantly promoted the shoot and allied growth attributes of GAs-deficient dwarf mutant Waito-C and Dongjin-beyo rice. Analysis of the pure cultures of these endophytic fungi showed biologically active GAs (GA 1, GA 3, GA 4 and GA 7) in various quantities. The cultures of P. glomerata and Penicillium sp. also contained IAA. The culture application and endophytic-association with host-cucumber plants significantly increased the plant biomass and related growth parameters under sodium chloride and polyethylene glycol induced salinity and drought stress as compared to control plants. The endophytic symbiosis resulted in significantly higher assimilation of essential nutrients like potassium, calcium and magnesium as compared to control plants during salinity stress. Endophytic-association reduced the sodium toxicity and promoted the host-benefit ratio in cucumber plants as compared to non-inoculated control plants. The symbiotic-association mitigated stress by compromising the activities of reduced glutathione, catalase, peroxidase and polyphenol oxidase. Under stress conditions, the endophyte-infection significantly modulated stress through down-regulated abscisic acid, altered jasmonic acid, and elevated salicylic acid contents as compared to control. In conclusion, the two endophytes significantly reprogrammed the growth of host plants during stress conditions. View Full-Text
Keywords: endophytic fungi; phytohormones; abiotic stress; mutualism
논문정보
- Research article
- 2012년 09월 (BRIC 등록일 2019-12-24)
- 국내(교신)+국외 연구진
- 120회 이상 인용된 논문
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