Alen'kina S A, Trutneva K A, Nikitina V E
Izv Akad Nauk Ser Biol. 2013 Nov-Dec(6):760-4.
The time course of changes in the endogenous content of salicylic acid, the ratio between the acid's free and bound forms, and changes in the activities of phenylalanine ammonia-lyase and catalase in wheat seedling roots under the effect of lectins of two strains of the associative nitrogen-fixing bacterium Azospirillum (A. brasilense Sp7 and its mutant defective in lectin activity, A. brasilense Sp7.2.3) is investigated. Differences in plant response to the action of the lectins from these two strains are established. On the basis of the obtained data, a model is proposed for lectin-assisted induction of resistance, according to which the lectin effect on the roots of seedlings results in the accumulation of free salicylic acid, which inhibits catalase activity, ultimately leading to accumulation of hydrogen peroxide and formation of induced resistance.
研究了两株联合固氮细菌巴西固氮螺菌（Azospirillum brasilense Sp7及其凝集素活性缺陷突变体A. brasilense Sp7.2.3）的凝集素作用下，小麦幼苗根中水杨酸内源含量的变化时间进程、该酸游离态与结合态的比例变化以及苯丙氨酸解氨酶和过氧化氢酶活性的变化。确定了植物对这两种菌株凝集素作用的反应差异。基于所得数据，提出了凝集素辅助诱导抗性的模型，根据该模型，凝集素对幼苗根的作用导致游离水杨酸积累，抑制过氧化氢酶活性，最终导致过氧化氢积累并形成诱导抗性。
