Tyrosinase inhibitors from galls of Rhus java']javanica leaves and their effects on insects

被引:0
|
作者
Kubo, I [1 ]
Kinst-Hori, I
Nihei, K
Soria, F
Takasaki, M
Calderón, JS
Céspedes, CL
机构
[1] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA
[2] Univ Nacl Autonoma Mexico, Inst Quim, Dept Nat Prod, Mexico City 04510, DF, Mexico
来源
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION C-A JOURNAL OF BIOSCIENCES | 2003年 / 58卷 / 9-10期
关键词
gallae rhois; tyrosinase inhibitory activity; insect growth inhibitory activity;
D O I
暂无
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
As a defense mechanism of the leaves of Rhus javanica (Anacardiaceae) against the aphid Melaphis chinensis (Aphididae) attack, tannic acid is rapidly accumulated and forms galls along the midrib of the leaves resulting in a unique natural medicine Gallae Rhois. Tannic acid was found to inhibit the oxidation Of L-3,4-dihydroxyphenylalanine (L-DOPA) catalyzed by tyrosinase (EC 1.14.18.1) with an IC(50) of 22mum. The aphid would detoxify the ingested toxic tannic acid to relatively nontoxic gallic acid, whereas the non-adapted pink bollworm Pectinophora gossypiella larvae are sensitive to the ingested tannic acid.
引用
收藏
页码:719 / 725
页数:7
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