The effect of Pseudomonas fluorescens and Fusarium oxysporum f. sp cubense on induction of defense enzymes and phenolics in banana

被引：62

作者：

Thangavelu, R ^{[1
]}

Palaniswami, A ^{[1
]}

Doraiswamy, S ^{[1
]}

Velazhahan, R ^{[1
]}

机构：

[1] Tamil Nadu Agr Univ, Ctr Plant Protect Studies, Dept Plant Pathol, Coimbatore 641003, Tamil Nadu, India

来源：

BIOLOGIA PLANTARUM | 2003年 / 46卷 / 01期

关键词：

fluorescent pseudomonad; Fusarium wilt; induced resistance; lytic enzymes; Musa sp;

D O I：

10.1023/A:1022374520121

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The effect of Pseudomonas fluorescens treatment and Fusarium oxysporum f. sp. cubense inoculation on induction of phenylalanine ammonia-lyase (PAL), peroxidase (POX), chitinase, beta-1,3-glucanase and accumulation of phenolics in banana (Musa sp.) was studied. When banana roots were treated with P. fluorescens strain Pf 10, a two-fold increase in phenolic content in leaf tissues was recorded 3 - 6 d after treatment. Challenge inoculation with F. oxysporum, the wilt pathogen, steeply increased the phenolic content in P. fluorescens-treated banana plants. Significant increase in POX activity was detected 6 - 9 d after P. fluorescens treatment. PAL, chitinase and beta-1,3-glucanase activities increased significantly from 3 d after P. fluorescens treatment and reached the maximum 6 d after treatment. Challenge inoculation with F oxysporum further increased the enzyme activities. These results suggest that the enhanced activities of defense enzymes and elevated content of phenolics may contribute to bioprotection of banana plants against F oxysporum.

引用

页码：107 / 112

页数：6

共 40 条

[1] INDUCTION OF DISEASE RESISTANCE IN COMMON BEAN SUSCEPTIBLE TO HALO BLIGHT BACTERIAL PATHOGEN AFTER SEED BACTERIZATION WITH RHIZOSPHERE PSEUDOMONADS [J].