Physiological role of rice gibberellin inactivation pathway induced by rice blast infection.

赤霉素(GAs)是一类植物激素，在植物生命周期的不同阶段促进生长：种子萌发、茎伸长、叶展开、开花和果实生长。同时，最近的研究表明赤霉素信号参与了植物对疾病的反应。在这项研究中，为了阐明水稻基因上调、编码GA失活酶和降低稻瘟病侵染叶片中生物活性气体水平的生理作用。我们的结果表明，这种现象可能是水稻的防御反应之一。

Gibberellins (GAs) are a class of plant hormones that promote growth in various stages of plant lifecycle: seed germination, stem elongation, leaf expansion and flowering and fruit growth. Meanwhile, recent reports revealed that gibberellin signal is involved in disease response. In this study, to clarify the physiological role of upregulation of a rice gene, encoding a GA inactivation enzyme and decreased levels of bioactive GAs in rice blast infected leaves. Our results suggested that this phenomenon might be one of the defensive reactions in rice.