Effects of Zn Stress on Zn Accumulation and Anti-Oxidant Enzymes Activity in Four Varieties of Ryegrass

• Published in: Wuhan University journal of natural sciences 2005, Vol.10 (6), p.1051-1056
• Main Author: XU Wei-hong XIONG Zhi-ting HUANG He
• Format: Article
• Language: English
• Subjects: Accumulation; Biomass; Oxidants; Oxidizing agents; Peroxidase; Plant biomass; Plant growth; Proline; Shoots; Superoxide dismutase; Zinc; 厌氧酶; 植物生长; 酶活性; 锌聚集; 黑麦草
• ISSN: 1007-1202; 1993-4998
• DOI: 10.1007/bf02832466

We investigated the influence of different content of Zn^2＋（0, 2, 4, 8, 16 mmol·kg^-1） on plant growth, activities of peroxidase （POD） and superoxide dismutase （SOD）, free proline content and Zn accumulation in four varieties of ryegrass （Loliurn perenne L.） hy pot cuhure experiment. The results showed that plant hiomass increased at the ranges of 0-2 （Tuoya）, 0-4 （Yey- ing）, 0-8 mmol·kg^-1（Airuisi and Taide）, respectively, and then decreased under excess Zn. The activities of POD ,SOD and proline content in shoots decreased firstly, and then increased with the in crease of Zn content. The plaut biomass, activities of POD and SOD in Taide were evidently higher than in the other three varie ties. Root tolerance index （RTI） and Zn transport ratio from root to shoot （S/R） in Taide were exceed 1. 0. The maximum of Zn content was 583.9 mg/kg （ at 16 mmol·kg^-1） in Taide＇s shoot.