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首页> 外文期刊>African Journal of Biotechnology >Effect of drought stress induced by polyethylene glycol (PEG) on germination indices in corn (Zea mays L.) hybrids
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Effect of drought stress induced by polyethylene glycol (PEG) on germination indices in corn (Zea mays L.) hybrids

机译：聚乙二醇（PEG）引发的干旱胁迫对玉米（Zea mays L.）杂交种发芽指数的影响

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摘要

Drought stress is one of the most important environmental factors in reduction of growth, development and production of plants. Germination is one of the main growth stages and success in this stage is dependent on moisture content of soil at time of planting. This study examined germination characteristics of seven corn hybrids under five levels of osmotic potential (0, -3, -6, -9 and -12 bar) by polyethylene glycol (PEG) 6000 using a factorial experiment based on a completely randomized design with three replications. Results indicated that water potential significantly reduced germination percent (71.2%), germination rate (24.2%), root length (60%), shoot length (89.8%), seedling length (71.2%) and seed vigour (91.7%).?The mean germination time and?root/shoot length ratio?increased with decrease in the osmotic potential of PEG solution.?Hybrid K3651/1×K166B produced the highest germination percent, germination rate, root length, seedling length and seed vigour, hence this hybrid was the most tolerant hybrid to drought stress.
机译：干旱胁迫是减少植物生长，发育和生产的最重要的环境因素之一。萌发是主要的生长阶段之一，该阶段的成功取决于种植时土壤的水分含量。这项研究使用基于完全随机设计的因子分解实验（三项实验），通过聚乙二醇（PEG）6000检验了五种渗透势水平（0，-3，-6，-9和-12 bar）下七个玉米杂交种的发芽特性。复制。结果表明，水势显着降低了发芽率（71.2％），发芽率（24.2％），根长（60％），苗长（89.8％），苗长（71.2％）和种子活力（91.7％）。随着PEG溶液渗透势的降低，平均发芽时间和根/茎长比增加。杂交K3651 / 1×K166B的发芽率，发芽率，根长，幼苗长和种子活力最高，因此杂种是对干旱胁迫最耐受的杂种。

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