Effects of salicylic acid and cold on freezing tolerance in winter wheat leaves
Effects of salicylic acid and cold on freezing tolerance in winter wheat leaves
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DOI：
10.1023/b:grow.0000007504.41476.c2
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发表时间：
2003-11
影响因子：
4.2
通讯作者：
Esen Taşğın;Ö. Atici;B. Nalbantoğlu
中科院分区：
文献类型：
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作者：
Esen Taşğın;Ö. Atici;B. Nalbantoğlu
研究了水杨酸（0.01、0.1和1 mM）和低温对冬小麦（Triticum aestivumcv. Dogu-88）在对照（20/18 °C下15、30和45天）和冷（15/10 °C下15天，10/5 °C下30天和5/3 °C下45天）条件下生长。冷驯化造成的伤害减少叶段从植物中取出，并受到冻结条件。外源SA还降低了在冷（15/10 °C）和对照（15和30天）条件下生长的叶片中的冻害。冷条件（10/5和5/3 °C）通过从叶中分离的质外体蛋白引起冰核活性的增加。这是第一次表明，外源SA引起增加在冷（15/10和10/5 °C）和控制条件下的冰核活性。这些结果表明，水杨酸可以通过影响质外体蛋白来提高冬小麦叶片的抗冻性。
The effects of salicylic acid (SA) (0.01, 0.1 and 1 mM) and cold on freezing tolerance (freezing injury and ice nucleation activity) were investigated in winter wheat (Triticum aestivumcv. Dogu-88) grown under control (20/18 °C for 15, 30 and 45-day) and cold (15/10 °C for 15-day, 10/5 °C for 30-day and 5/3 °C for 45-day) conditions. Cold acclimatisation caused a decrease of injury to leaf segments removed from the plants and subjected to freezing conditions. Exogenous SA also decreased freezing injury in the leaves grown under cold (15/10 °C) and control (15 and 30-day) conditions. Cold conditions (10/5 and 5/3 °C) caused an increase in ice nucleation activity by apoplastic proteins, which were isolated from the leaves. For the first time, it was shown that exogenous SA caused an increase in ice nucleation activity under cold (15/10 and 10/5 °C) and control conditions. These results show that salicylic acid can increase freezing tolerance in winter wheat leaves by affecting apoplastic proteins.