Abstract

Salinity is a major environmental stress worldwide that adversely affects plant’s growth and metabolism. Various studies have demonstrated the positive effect of growth regulators on improving stress tolerance of plants. In this study, Crocus sativus as a profitable herb and expensive spice was subjected to nitric oxide and salicylic acid treatments to improve its sustainability under salinity stress. Based on our results treating Crocus sativus corms with nitric oxide caused more growth under salinity stress, also nitric oxide was able to reduce stress effects by compatible solutes accumulation, inducing antioxidative enzyme activities and increasing the biosynthesis of secondary metabolites. However, salicylic acid treatment did not improve plant growth under salinity.

摘要

盐度是世界范围内的主要环境压力，会对植物的生长和代谢产生不利影响。各种研究表明，生长调节剂对提高植物的抗逆性具有积极作用。在这项研究中，对番红花作为一种有益的草药和昂贵的香料进行了一氧化氮和水杨酸处理，以提高其在盐胁迫下的可持续性。根据我们的研究结果，一氧化氮处理番红花球茎在盐分胁迫下引起更多的生长，一氧化氮也能够通过相容性溶质的积累来减少胁迫效应，诱导抗氧化酶活性并增加次生代谢产物的生物合成。但是，水杨酸处理并不能改善盐度下的植物生长。