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首页> 外文期刊>Cytology and genetics >Formation of adaptive reactions in Arabidopsis thaliana wild-type and mutant jin1 plants under action of abscisic acid and salt stress
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Formation of adaptive reactions in Arabidopsis thaliana wild-type and mutant jin1 plants under action of abscisic acid and salt stress

机译：脱落酸和盐胁迫对拟南芥野生型和突变体jin1植物适应性反应的形成

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摘要

To elucidate the possible role of the transcription factor (TRF) JIN1/MYC2 in implementation of stress-protective effects of abscisic acid (ABA), the effect of exogenous ABA on the state of stomata and the activity of antioxidant enzymes and proline content under salt stress conditions in Arabidopsis thaliana plants of wild type (Col-0) and jin1 mutants with impaired jasmonate signaling was investigated. Treatment of leaves' epidermis with ABA (10 or 100 mu M) caused the closing of stomata in Col-0 plants but has hardly any influence on stomatal aperture in jin1 mutants. Salt stress (200 mM NaCl exposure for 24 h) caused a reduction of the water content in the plant leaves of both genotypes. Addition of 10 mu M ABA into the growing medium contributed to a maintaining of normal hydration in wild-type but not in jin1 plants under salt stress. ABA treatment caused an almost twofold increase in proline content in the leaves of plants of both genotypes under normal conditions. Pretreatment with phytohormone contributed to enhancing the proline content in wild-type plants at salt stress and had a less significant effect on its amount in jin1 plants. Treatment with ABA under physiologically normal conditions increased the catalase activity in wild-type plants. Both genotypes under ABA influence showed increased activity of superoxide dismutase (SOD). Under salt stress conditions, higher activity of SOD, catalase, and guaiacol peroxidase was observed in ABA-treated wild-type plants but not in jin1 mutants. A conclusion about the participation of TRF JIN1/MYC2 in the formation of certain ABA-induced physiological responses of Arabidopsis plants was made.
机译：为了阐明转录因子（TRF）JIN1 / MYC2在实施脱落酸（ABA）的胁迫保护作用，外源ABA对气孔状态以及盐下抗氧化酶和脯氨酸含量的影响中的可能作用研究了野生型（Col-0）拟南芥植物和茉莉酸酯信号转导受损的jin1突变体的胁迫条件。用ABA（10或100μM）处理叶片的表皮会导致Col-0植物的气孔关闭，但对jin1突变体的气孔孔径几乎没有影响。盐胁迫（200 mM NaCl暴露24 h）导致两种基因型植物叶片中的水分减少。在生长培养基中添加10μM ABA有助于维持野生型的正常水合作用，但不能在盐胁迫下的jin1植物中维持正常的水合作用。在正常条件下，ABA处理使两种基因型植物的叶片中脯氨酸含量几乎增加了两倍。用植物激素进行预处理有助于提高盐胁迫下野生型植物的脯氨酸含量，而对金1植物的脯氨酸含量影响较小。在生理上正常的条件下用ABA处理可提高野生型植物中的过氧化氢酶活性。 ABA影响下的两种基因型均显示出超氧化物歧化酶（SOD）活性增加。在盐胁迫条件下，在ABA处理的野生型植物中观察到了更高的SOD，过氧化氢酶和愈创木酚过氧化物酶活性，但在jin1突变体中却没有。关于TRF JIN1 / MYC2参与某些ABA诱导的拟南芥植物生理反应的形成的结论。

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