Chemical structure of two phytotoxic exopolysaccharides produced by Phomopsis foeniculi

被引：30

作者：

Corsaro, MM

De Castro, C

Evidente, A

Lanzetta, R

Molinaro, A

Mugnai, L

Parrilli, M

Surico, G

机构：

[1] Univ Naples Federico II, Dipartimento Chim Organ & Biol, I-80134 Naples, Italy

[2] Univ Naples Federico II, Dipartimento Sci Chimicoagr, I-80055 Portici, Italy

[3] Univ Firenze, Ist Patol & Zool Forestale & Agr, I-50144 Florence, Italy

来源：

CARBOHYDRATE RESEARCH | 1998年 / 308卷 / 3-4期

关键词：

galactan; mannan; Phomopsis foeniculi; phytotoxicity; fungi;

D O I：

10.1016/S0008-6215(98)00085-8

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：

The two main exocellular polysaccharides produced in vitro by Phomopsis foeniculi, a fungal pathogen of fennel, were isolated and characterized by chemical and spectroscopic methods as a galactan with the known structure [-->6)-beta-D-Galf-(1-->5)-beta-D-Galf-(1-->5)-beta-D-Galf-(1-->](n) and a mannan. The latter consists of a backbone of alpha-(1-->6)-linked mannopyranose units. Almost all of these are branched at the 2 position with arms containing 2- and 3-linked mannopyranose units, The crude polysaccharide fraction and its components, galactan and mannan, showed phytotoxic effects, i.e. chlorosis, necrosis and/or wilting, on fennel and on two non-host plants, tobacco and tomato. (C) 1998 Elsevier Science Ltd., All rights reserved.

引用

页码：349 / 357

页数：9

共 36 条

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