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首页> 外文期刊>Russian Journal of Plant Physiology >The effects of root treatment with various stress agents on plant cold- and heat-tolerance
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The effects of root treatment with various stress agents on plant cold- and heat-tolerance

机译：各种胁迫剂根系处理对植物耐冷热的影响

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摘要

The root systems of cucumber (Cucumis sativus L.), wheat (Triticum aestivum L.), and barley (Hordeum vulgare L.) plants were subjected to a short-term (6-7-h-long) treatment with low and high temperatures, sodium chloride, and lead nitrate, and the effect of these treatments on the changes in the cold- and heat-tolerance of leaf cells was determined. It was established that chilling of cucumber and wheat seedling roots at 10 and 2degreesC, respectively, or their heating at 38degreesC and 40degreesC, respectively, induced an increase in both cold- and heat-tolerance of leaf cells. An increase in the cold- and heat-tolerance was also observed in roots treated with sodium chloride at concentrations of 0.15 M (cucumber) and 0.2 M (wheat), as well as with lead nitrate at a concentration of 0.1 mM (barley, wheat). The tolerance increase induced by these stress agents was accompanied by a considerable increase in the ABA concentration in leaves. The effect of physical and chemical stress agents is suggested to induce the same nonspecific changes in the aboveground organs. These changes bring about, directly or indirectly, an increase in the cold- and heat-tolerance and are related to an increase in the ABA content.
机译：对黄瓜（Cucumis sativus L.），小麦（Triticum aestivum L.）和大麦（Hordeum vulgare L.）植物的根系进行了短期（6-7小时长）高低处理。确定温度，氯化钠和硝酸铅的浓度，以及这些处理对叶细胞耐寒性和耐热性变化的影响。已经确定，黄瓜和小麦幼苗的根分别在10℃和2℃下冷却，或分别在38℃和40℃下加热，都会引起叶细胞的耐寒性和耐热性的增加。在氯化钠浓度分别为0.15 M（黄瓜）和0.2 M（小麦）以及硝酸铅浓度为0.1 mM（大麦，小麦）下处理的根系中，耐寒性和耐热性也有所提高。 ）。这些胁迫剂引起的耐性增加伴随着叶片中ABA浓度的显着增加。建议物理和化学胁迫剂的作用在地上器官中引起相同的非特异性变化。这些变化直接或间接引起耐寒性和耐热性的增加，并且与ABA含量的增加有关。

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