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首页> 外文期刊>Journal of Science and Technology of Greenhouse Culture >Effects of salinity stress on physiological characteristics and absorption quality of sodium and potassium in aerial parts and tubers of three radish cultivars
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Effects of salinity stress on physiological characteristics and absorption quality of sodium and potassium in aerial parts and tubers of three radish cultivars

机译：盐分胁迫对3个萝卜品种地上部分和块茎生理特性及钠钾吸收质量的影响

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Salinity is a limiting factor in agricultural production that inflicts great damages on agricultural products. In order to decrease or stop salinity stress, numerous methods are proposed by different researchers. One of the methods to reduce the damages of salinity stress is cultivating tolerant plants to salinity. In this research, resistance of three radish cultivars to salinity stress was investigated, from physiological points of view, and the best resistant cultivar was introduced. This factorial experiment was carried out in Research Greenhouse of Ferdowsi University of Mashhad, Iran, based on complete randomized design, with three replications. Treatments included three commercial cultivars of radish (Cherry belle, Sparkler and Scarlett Cincinnati) as the first factor and four levels of salinity (control, 33, 66 and 99 mM NaCl) as the second factor. Salinity levels, as soluble form in irrigation water, were applied at the four-leaf stage of the plants. Results showed that salinity decreased the amount of soluble sugars and potassium content of aerial parts and tubers, and also increased stomatal conductance, anthocyanin content of tubers and sodium content of aerial parts and tubers. The highest tolerance of different radish cultivars to salinity stress was observed at 66 mM salinity level and the 33 mM salinity level had no significant difference, compared to control, in most physiological characteristics. Under salinity stress conditions, sodium accumulation in aerial parts was more than tubers. The highest amount of tuber anthocyanin was measured at 66 mM salinity level in Scarlett Cincinnati cultivar. Among the radish cultivars, the highest salinity tolerance and salt accumulation was obtained from Scarlett Cincinnati cultivar. Considering that the apparent shape of this cultivar (stretched appearance with red color) is very different from Cherry belle and Sparkler cultivars, and more water is stored in its tissues, thus, this trait has caused high resistance to salinity stress.
机译：盐度是农业生产中的限制因素，对农业产品造成巨大损害。为了减少或停止盐分胁迫，不同的研究人员提出了许多方法。减少盐分胁迫损害的方法之一是培育耐盐植物。本研究从生理学角度研究了3个萝卜品种对盐胁迫的抗性，并介绍了最佳的抗性品种。此因子实验是在完全随机设计的基础上，在伊朗Mashhad的Ferdowsi大学的研究温室中进行的，具有三个重复项。处理方法包括将三个商业化的萝卜品种（樱桃甜菜，Sparkler和Scarlett Cincinnati）作为第一因子，将四个盐度水平（对照，33、66和99 mM NaCl）作为第二因子。盐度水平以灌溉水中的可溶形式应用于植物的四叶期。结果表明，盐度降低了地上部和块茎的可溶性糖含量和钾含量，并增加了气孔导度，块茎的花色苷含量和地上部和块茎的钠含量。观察到不同萝卜品种对盐胁迫的最高耐受性为66 mM盐度水平，而33 mM盐度水平与对照相比，在大多数生理特性上没有显着差异。在盐分胁迫条件下，地上部的钠积累量比块茎高。在斯嘉丽·辛辛那提（Scarlett Cincinnati）品种中，块茎花青素含量最高，盐度为66 mM。在萝卜品种中，从斯嘉丽辛辛那提品种获得最高的盐分耐受性和盐分积累。考虑到该品种的表观形状（红色拉伸外观）与Cherry belle和Sparkler品种有很大不同，并且组织中储存了更多的水，因此，该性状对盐分胁迫具有较高的抵抗力。

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