Effect of Lanthanum on Mycelium Growth and Some Pathogenic Factors
来源期刊：JOURNAL OF RARE EARTHS2006年第4期
论文作者：Hu Lin Zhang Wenji Zhang Chi Mu Kangguo Cui Jianyu Zhao Xiuqin
Key words：pathogenic fungi; lanthanum; mycelium growth; pathogenic factor; rare earths;
Abstract: Three soil-transmitted pathogenic fungi including Rhizoctonia solani, Fusarium solani, and Pythium sp. were selected to investigate the effect of lanthanum on their growth and the pathogenic enzymes using liquid culture. Variance analysis shows significant differences among treatments with different concentrations of lanthanum (Rhizoctonia solani F=6.75＞F0.01=5.99; Fusarium solani F=18.1＞F0.01=5.99, Pythium sp. F=23.29＞F0.01=5.99). The inhibitory effect of lanthanum on pathogenic fungi increased with an increase in La concentration. The activities of the three pathogenic enzymes per gram mycelium were promoted remarkably. However, the quantity or the activities of the total enzymes were inhibited because of the strong inhibition of mycelium growth by lanthanum. Meanwhile, the effect of lanthanum on toxins of pathogenic fungi were studied using the seed germination experiment. Toxins of pathogenic fungi are influenced by lanthanum and the virulence decreases significantly with the increase of lanthanum concentration.
Hu Lin1，Zhang Wenji2，Zhang Chi3，Mu Kangguo1，Cui Jianyu1，Zhao Xiuqin4
(1.College of Resource and Environmental Science, China Agricultural University, Beijing 100094, China;
2.College of Science, China Agricultural University, Beijing 100094, China;
3.Shenzhen Tourism College of Jinan University, Shenzhen 518053, China;
4.Institute of Crop Science, Chinese Academy of Agricultural Science, Beijing 100081, China)
Abstract:Three soil-transmitted pathogenic fungi including Rhizoctonia solani, Fusarium solani, and Pythium sp. were selected to investigate the effect of lanthanum on their growth and the pathogenic enzymes using liquid culture. Variance analysis shows significant differences among treatments with different concentrations of lanthanum (Rhizoctonia solani F=6.75＞F0.01=5.99; Fusarium solani F=18.1＞F0.01=5.99, Pythium sp. F=23.29＞F0.01=5.99). The inhibitory effect of lanthanum on pathogenic fungi increased with an increase in La concentration. The activities of the three pathogenic enzymes per gram mycelium were promoted remarkably. However, the quantity or the activities of the total enzymes were inhibited because of the strong inhibition of mycelium growth by lanthanum. Meanwhile, the effect of lanthanum on toxins of pathogenic fungi were studied using the seed germination experiment. Toxins of pathogenic fungi are influenced by lanthanum and the virulence decreases significantly with the increase of lanthanum concentration.
Key words:pathogenic fungi; lanthanum; mycelium growth; pathogenic factor; rare earths;
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