Polyamine metabolism in maize tumors induced by Ustilago maydis

被引：50

作者：

Rodriguez-Kessler, Margarita

Ruiz, Oscar A. ^{[1
]}

Maiale, Santiago ^{[1
]}

Ruiz-Herrera, Jose ^{[2
]}

Jimenez-Bremont, Juan Francisco

机构：

[1] IIB INTECH UNSAM CONICET, Unidad Biotecnol 1, RA-7130 Chascomus, Buenos Aires, Argentina

[2] CINVESTAV IPN, Dept Ingn Genet, Unidad Irapuato, Guanajuato 36500, Mexico

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2008年 / 46卷 / 8-9期

关键词：

biotic stress; free and conjugated polyamines; plant tumors; Ustilago maydis; Zea mays;

D O I：

10.1016/j.plaphy.2008.05.012

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Alterations occurring in polyamine metabolism of maize in tumors formed during the interaction with the biotrophic pathogenic fungus Ustilago maydis were analyzed. During the process, a striking increase in maize polyamine biosynthesis, mainly free and conjugated putrescine occurred in the tumors induced by the fungus, and in the neighbor plant tissues. This increase correlated with an activation mainly of Adc, Samdc1, Znzsamdc2 and Zmsamdc3, but not of Zmodc, Znispds1 and Znispds2 genes, and an elevation in arginine decarboxylase activity, confirming a predominant role of this enzyme in the process. Evidences for a possible contribution of spermidine and spermine degradation by polyamine oxidase activity, probably related to cell wall stiffening or lignification during tumor growth, were also obtained. It is suggested that polyamines, mainly putrescine, might play an active role in the pathosystem maize-U. maydis. (C) 2008 Elsevier Masson SAS. All rights reserved.

引用

页码：805 / 814

页数：10

共 58 条

[1] Overexpression of ADC2 in Arabidopsis induces dwarfism and late-flowering through GA deficiency [J].