Lithium treatment induces a hypersensitive-like response in tobacco
Lithium treatment induces a hypersensitive-like response in tobacco
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DOI：
10.1007/s00425-003-1017-4
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发表时间：
2003-07-01
期刊：
影响因子：
4.3
通讯作者：
Serrano, R
中科院分区：
文献类型：
--
作者：
Naranjo, MA;Romero, C;Serrano, R
烟草（Nicotiana tabacum L.）与不相容的病原体相互作用的情况一样，含锂的植物诱导坏死损伤和叶片卷曲的形成。在分子水平上的进一步相似性包括乙烯和水杨酸和龙胆酸的积累，以及诱导表达的发病相关的PR-P，PR 5和PR 1基因。除PR 1诱导外，锂在转基因烟草植物中产生了相同的效果，这些转基因烟草植物由于细菌羟化酶基因nahG的过表达而不积累水杨酸。另一方面，用氨基乙氧基乙烯基甘氨酸抑制乙烯生物合成阻止了锂诱导的细胞死亡和PR 5表达。这些结果表明，锂触发了一个超敏反应，乙烯信号是必不可少的。
Treatment of tobacco (Nicotiana tabacum L.) plants with lithium induces the formation of necrotic lesions and leaf curling as in the case of incompatible pathogen interactions. Further similarities at the molecular level include accumulation of ethylene and of salicylic and gentisic acids, and induced expression of pathogenesis-related PR-P, PR5 and PR1 genes. With the exception of PR1 induction, lithium produced the same effects in transgenic tobacco plants that do not accumulate salicylate because of overexpression of the bacterial hydroxylase gene nahG. On the other hand, inhibition of ethylene biosynthesis with aminoethoxyvinylglycine prevented lithium-induced cell death and PR5 expression. These results suggest that lithium triggers a hypersensitive-like response where ethylene signalling is essential.