| Effect of Lanthanum on Growth and Extracellular Enzyme Acitivty of Erwinia Chrysanthemi in vitro |
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| 作者姓名： | Liu Qingdu |
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| 作者单位： | Liu Qingdu (School of Life Science，University of Science and Technology of China，Hefei 230026，China) Zhang Jian，Cheng Heyuan (Department of Plant Protection，Anhui
Agricultural University，Hefei 230036，China) |
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| 摘 要： | Ａｌｏｎｇｗｉｔｈｔｈｅｌａｒｇｅｓｃａｌｅａｐｐｌｉｃａｔｉｏｎｏｆｒａｒｅｅａｒｔｈｉｎａｇｒｉｃｕｌｔｕｒｅ，ｇｒｅａｔａｍｏｕｎｔｏｆｒａｒｅｅａｒｔｈｃｏｍｐｏｕｎｄｓｅｎｔｅｒｅｄｅｎｖｉｒｏｎｍｅｎｔｔｏｒｅｓｕｌｔｉｎａｃｕｍｕｌａｔ...
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Effect of Lanthanum on Growth and Extracellular Enzyme Acitivty ofErwinia Chrysanthemi in
vitro |
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| Liu Qingdu.Effect of Lanthanum on Growth and Extracellular Enzyme Acitivty of Erwinia Chrysanthemi in vitro[J].Journal of Rare Earths,1999(2). |
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| Authors: | Liu Qingdu |
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| Abstract: | The effect of lanthanum on the growth
and extracellular enzyme activity of Erwinia chrysanthemi(Ech) was studied. Lanthanum
inhibited the growth of Ech in solid culture at the concentration of 50, 100, 150, 200, 250, 300
and 350 mgL-1, and the inhibition increased with the increase of the RE concentration. The
formation of colony delayed and the diameter of colony decreased. Lanthanum stimulated the
growth of Ech within 24h when the lanthanum concentration was less than 200 mgL-1 in liquid
medium, but significantly inhibited the growth of Ech with the increase of lanthanum
concentration and culture time. When the concentration was higher than 350 mgL-1, the growth
of Ech was inhibited completely both in solid and liquid culture. The extracellular enzyme
acitivity of Ech was affected by lanthanum at 200 mgL-1. The activity of cellulose was promoted
more than that of protease but the activity of pectinase was decreased. The maceration to
potato tuber tissue decreased when the cell free filtrate was tr |
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| Keywords: | Rare earths Lanthanum Erwinia chrysanthemi Extracellular enzyme Maceration eated with lanthanum |
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