TY - JOUR AU - SUN, Bing AU - LI, Mengxi AU - HU, Die AU - PAN, Xiao AU - FEI, Yongjun PY - 2021/04/29 Y2 - 2024/03/29 TI - Effects of exogenous NO on antioxidant system of Taxus plants under simulated acid rain stress JF - Notulae Botanicae Horti Agrobotanici Cluj-Napoca JA - Not Bot Horti Agrobo VL - 49 IS - 2 SE - Review Articles DO - 10.15835/nbha49212052 UR - https://notulaebotanicae.ro/index.php/nbha/article/view/12052 SP - 12052 AB - <p><em>Taxus</em> is a famous medicinal and landscape tree species. The aim of this study was to explore the effect of exogenous nitric oxide (NO) on the resistance of <em>Taxus</em> plants to acid rain stress and to identify <em>Taxus</em> species with strong acid rain resistance by principal component analysis and comprehensive evaluation. In this study, sodium nitroprusside (SNP) was used as the exogenous NO donor. The effects of different SNP solution concentrations on the antioxidant systems of three <em>Taxus</em> species subjected to simulated acid rain stress (pH = 3.0) were compared. In order to achieve this goal, we determined the rate of O<sup>2-</sup> production, the ASA and GSH contents in leaves of three <em>Taxus</em> plants (<em>Taxus mairei</em>, <em>Taxus chinensis</em>, and <em>Taxus yunnanensis</em>). At the same time, the active leaves of some antioxidant enzymes (SOD, POD, CAT, APX and GR) were determined. For <em>Taxus chinensis</em> plants subjected to acid rain stress, treatment with an SNP concentration of 0.25 mmol·L<sup>-1</sup> led to the most significant improvements in the antioxidant system. For <em>Taxus mairei</em> and<em> Taxus yunnanensis</em>, the treatment with the SNP concentration of 0.50 mmol·L<sup>-1</sup> was best for improving their antioxidant systems under stress. Meanwhile, <em>Taxus chinensis</em> had the strongest resistance to simulated acid rain, followed by<em> Taxus mairei</em> and <em>Taxus yunnanensis</em>.</p> ER -