Читать книгу Nitric Oxide in Plants - Группа авторов - Страница 16

The involvement of NO in plant signaling pathways is well recognized, but it is necessary to decipher the NO signaling routes, its targets, and its inductive or repressive effects on gene expression levels. Polverari et al. (2003) investigated the NO-induced changes in expression profiles of 2500 A. thaliana transcripts and discovered NO-induced alterations in 120 transcripts. The comparison of 71 differentially expressed complementary DNAs with microarray data revealed that the majority of NO-regulated genes are also impacted by other biotic and abiotic stress situations. In addition, Polverari et al. (2003) discovered that NO generated several plant defense response modifying transcription factors such as WRKYs, EREBPs (ethylene responsive element binding proteins), numerous zinc finger proteins, and dehydration responsive element binding proteins (DREB1 and DREB 2). NO donors were administered to tobacco plants or cell suspension cultures, which promoted the expression of defense-related genes PAL and PR1. These are indicators for phenyl propanoid synthesis and SA-mediated signaling, respectively, and are encoded by cryptography. Each of these genes plays a significant role in disease resistance (Delledonne et al. 1998; Durner et al. 1998).