title: Cadmium Toxicity and Alleviating Effects of Exogenous Salicylic Acid in Iris hexagona.
abstract: Cadmium (Cd) toxictity and possible role of salicylic acid (SA) in alleviating Cd-induced toxicity were investigated on ornamental hydrophyte Iris hexagona. Compared to the control, treatments with 100 and 500 µM Cd for 7 days significantly decreased dry weight, the contents of chlorophyll, photosynthetic parameters, and increased the content of thiobarbituric acid reactive substance. Pretreatment of the roots of I. hexagona seedlings with 1 µM SA before Cd exposure may increase dry weight, photosynthetic rate, activities of antioxidant enzymes, improve the cell ultrastructure and protect plants from Cd-induced oxidative stress damage. However, SA pretreatment had no significant effect on Cd concentrations in the leaves and roots. It is suggested that SA-induced Cd tolerances in I. hexagona are likely associated with increases in antioxidant enzyme activities and vacuolar compartmentation, rather than Cd uptake.
authors: National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China.|Suzhou Polytechnic Institute of Agriculture, Suzhou, 215008, China.
authors: Ying
authors: Y
authors: Han
authors: College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, 225009, China.
authors: Gang
authors: G
authors: Chen
authors: National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China.
authors: Yahua
authors: Y
authors: Chen
authors: National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China. zgshen@njau.edu.cn.
authors: Zhenguo
authors: Z
authors: Shen
mesh_terms: D000975:Antioxidants / Q000494:pharmacology; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000633:toxicity*; D002734:Chlorophyll / Q000378:metabolism; D031323:Iris Plant / Q000187:drug effects* / Q000378:metabolism / Q000648:ultrastructure; D010788:Photosynthesis / Q000187:drug effects; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism; D020156:Salicylic Acid / Q000494:pharmacology*; D036226:Seedlings / Q000187:drug effects / Q000378:metabolism; D012989:Soil Pollutants / Q000633:toxicity*
chemical_list: D000975:Antioxidants; D012989:Soil Pollutants; D002104:Cadmium; D002734:Chlorophyll; D020156:Salicylic Acid
keywords: Antioxidant enzyme; Cadmium; Iris hexagona; Salicylic acid; Ultrastructure