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首页> 外文期刊>Research Journal of Agronomy >Application of Coleoptile Growth Response Method to Differentiate Osmoregulation Capability of Wheat (Triticum aestivum L.) Cultivars
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Application of Coleoptile Growth Response Method to Differentiate Osmoregulation Capability of Wheat (Triticum aestivum L.) Cultivars

机译：胚芽鞘生长响应方法在区分小麦品种渗透调节能力上的应用

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Osmoregulation, which involves maintenance of cell turgor by accumulation of solutes in response to drought stress, is one of the mechanisms involved in drought tolerance. Several methods have been proposed to be used in order to differentiate wheat genotypes in terms of osmoregulation capability. Among this coleoptile growth under drought stress condition is a valuable method as cultivars comparison and hence selection could be done at early growth stages. In order to compare osmoregulation capability of wheat genotypes which are recommended for cultivation under different environmental condition in Iran, an experiment was conducted in the crop science laboratory of Shahid Bahonar university of Kerman. Seeds were germinated in dark long caps under normal and drought stress condition which was imposed by 20 and 30% polyethylene glycol (6000) solutions. Coleoptile growth was measured in nearest mm 48 hours after germinated seeds exposed to drought stress. Frequency distribution of coleoptile growth under stress condition showed a bimodal distribution to each a significant normal distribution was fitted. Suggesting that genotypes could be classified into two different groups the first distribution located at 8.93 mm and the second at 21.4 mm. Higher coleoptile growth in the first group was attributed to high osmoregulation capability, while lower growth was assigned to low osmoregulation capability. On the other hand, cultivars with high coleoptile growth had significantly higher grain yield compared to those with low coleoptile growth under drought stress condition. High osmoregulation cultivars were suggested to be used for cultivation under dry condition and in breeding programs to increase drought tolerance by.
机译：渗透调节涉及通过抵抗干旱胁迫而溶质的积累来维持细胞的膨大，是参与耐旱性的机制之一。已经提出了几种方法用于根据渗透调节能力来区分小麦基因型。其中，胚芽鞘在干旱胁迫条件下的生长是一种有价值的方法，可以进行品种比较，因此可以在生长早期进行选择。为了比较推荐在伊朗不同环境条件下种植的小麦基因型的渗透调节能力，在克尔曼沙希德·巴哈纳尔大学的作物科学实验室进行了一项实验。在正常和干旱胁迫条件下，种子在黑暗的长帽中发芽，该条件由20％和30％的聚乙二醇（6000）溶液施加。在萌发的种子暴露于干旱胁迫后48小时，测量胚芽鞘的生长。胚芽鞘生长在压力条件下的频率分布表明，双峰分布均符合显着正态分布。这表明基因型可以分为两个不同的组，第一个分布在8.93 mm，第二个分布在21.4 mm。第一组中较高的胚芽鞘生长归因于高渗透压调节能力，而较低的生长归因于低渗透压调节能力。另一方面，胚芽鞘生长高的品种与干旱胁迫条件下胚芽鞘生长低的品种相比，具有较高的籽粒产量。建议将高渗透压栽培品种用于干旱条件下的栽培和育种计划中，以增加干旱耐受性。

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