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Alleviation of Drought Stress in Maize by Exogenous Application of Gibberellic Acid and Cytokinin
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  • Alleviation of Drought Stress in Maize by Exogenous Application of Gibberellic Acid and Cytokinin
  • Alleviation of Drought Stress in Maize by Exogenous Application of Gibberellic Acid and Cytokinin
저자명
Akter. Nurunnaher,Islam. M. Rafiqul,Karim. M. Abdul,Hossain. Tofazzal
간행물명
Journal of crop science and biotechnology
권/호정보
2014년|17권 1호|pp.41-48 (8 pages)
발행정보
한국작물학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The study was conducted to investigate the ameliorative roles of $GA_3$ and CK on adverse effects of drought in maize. Drought stressed maize plants were applied with $GA_3$ and CK at 50, 100, and $150mg;L^{-l}$ as foliar spray at the vegetative and the reproductive stages. Plant height, internode length, stem diameter, leaf chlorophyll index, and dry matter production were significantly affected by drought. In most cases, $GA_3$ and CK significantly improved the depressed plant traits, but in varying degrees depending on the growth stage encountering hormones, and their types and concentrations. Both $GA_3$ and CK were found to be very effective in alleviating drought-imposed adverse effects on maize at the vegetative phase. Such alleviating effects varied depending on the concentration of the hormones. Application of CK at $150mg;L^{-l}$ was excellent resulting in a 106% yield advantage compared to drought stress and 79.9% increase relative to well-watered controls. Conversely, $GA_3$ at $50mg;L^{-l}$ performed well showing 78.8% increase in grain yield. However, both $GA_3$ and CK had very little effect on improving the depressed growth and yield attributes in maize at the reproductive phase. The relative yield advantages for the hormones were mainly attributed to improving the cob and seed-bearing capacity of drought-stressed maize plants.