Control of beet and tomato damping-off by seed treatment with chitosan

被引：14
|
作者：
Mazaro, Sergio Miguel [1 ]
Wagner Junior, Americo [1 ]
dos Santos, Idalmir [2 ]
Citadin, Idemir [2 ]
Possenti, Jean Carlo [1 ]
de Gouvea, Alfredo [1 ]
机构：
[1] Univ Tecnol Fed Parana UTFPR, BR-85660000 Dois Vizinhos, PR, Brazil
[2] UTFPR, BR-85501970 Pato Branco, PR, Brazil
来源：
PESQUISA AGROPECUARIA BRASILEIRA | 2009年 / 44卷 / 11期
关键词：
systemic acquired resistance; pathogenesis-related proteins; damping-off; POSTHARVEST; RESISTANCE; INDUCTION; STORAGE; PLANTS; ELICITORS; DEFENSES; ROT;
D O I：
10.1590/S0100-204X2009001100008
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objective of this study was to evaluate the effect of seed treatment using the resistance inductor chitosan to control damping-off in tomato and beet seedlings, and its relationship with plant biochemical alterations and plant protection. Each plot was represented by twenty-five seeds. Treatments consisted of seed immersion in a chitosan suspension at 0, 0.25, 0.5, 1, 2 and 4% concentrations. Seeds were then sowed in trays with a substrate infected with Rhizoctonia sp. and maintained in greenhouse conditions for 14 days. Chitosan induced seedling resistance and reduced damping-off. The 1.1 and 2.5% concentrations were more efficient in controling the damping-off for beet and tomato crops respectively. Chitosan increases the phenylalanine ammonialyase (PAL) activity and interferes with the total proteins and total and reduced sugars rates in the leaves.
引用
收藏
页码：1424 / 1430
页数：7
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