Nitric Oxide mediated transcriptional Modulation in rice under arsenic stress. Oryza sativa

It is already known that exogenously supplied NO (SNP as NO donor) help in alleviation of arsenic toxicity by maintaining H2O2 in a certain level through balanced alterations of antioxidant enzyme activities. However, to decipher the exact sequence of events towards NO-mediated As tolerance a deeper study is worthwhile. To the best of our knowledge, there is no information in the literature on the endogenous metabolism of exogenously supplied NO under arsenic stress conditions. The present study aimed to analyze the key components of NO metabolisms (genome wide transcriptomic analysis) under arsenic stress using rice as the model plant and also to increase our understanding of potential interrelationships.

已有研究表明，外源性一氧化氮（NO，以硝普钠SNP作为NO供体）可通过调控抗氧化酶活性的平衡变化，将过氧化氢（H₂O₂）维持在适宜水平，从而缓解砷毒害。然而，若要解析一氧化氮介导的砷耐受相关事件的确切时序，仍需开展更为深入的研究。据我们所知，目前尚无文献报道砷胁迫条件下外源性一氧化氮的内源代谢相关研究。本研究以水稻为模式植物，旨在通过全基因组转录组分析技术，解析砷胁迫下一氧化氮代谢的关键组分，同时加深对其间潜在相互关联的认知。