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香蕉采后炭疽病发生与几丁酶、β-1,3-葡聚糖酶和多巴胺的关系

蒋跃明

中科院华南植物研究所. 广东, 广州 510650

摘要

几丁酶、β-1,3-葡聚糖酶随着香蕉采后炭疽病的发展过程，活性逐渐增加；但当果实出现明显病害症状时活性略有下降。施保功处理在抑制香蕉采后炭疽病发生的同时也抑制了芭蕉炭疽菌可能诱导的几丁酶和β-1,3-葡聚糖酶活性的增加。多巴胺在香蕉采收时含量较高,但随着炭疽病的发生明显下降。对“黑油身”和“63-１”两个不同抗病品种分析表明，前者几丁酶和β-1,3-葡聚糖酶活性和多巴胺含量较高与其较强的抗病性相一致。

关键词： 香蕉; 炭疽病; 几丁酶; β-1; 3-葡聚酶; 多巴胺

Incidence of anthracnose in relation to chitinase, beta-1,3-glucanase and dopamine of banana fruits after harvest

Juang Yueming

South China Institute of Botany,The Chinese Academy of Sciences.Guangzhou 510650,Guangdong

Abstract

The incidence of anthracnose caused by Colletotrichum musae on banana fruits after harvest was investigated when the fruits were　dipped in a solution of ethrel 1000 mg/L for 1 min and allowed to ripen for 5 d at 20℃ and RH 80%-90% prior to shelf period at ambient　temperature (25-30℃) and RH 55%-65%. The appearance of disease symptoms was related to the physiological condition of the fruits. The activities of chitinase and beta-1,3-glucanase increased gradually during　pathogenesis. However, it decreased a little when the fruits showed　obvious disease symptoms. The treatment with sporgon at a　concentration of 1 mg/L suppressed both the development of anthracnose and　the increases of chitinase and #beta#-1,3-glucanase activities, a　fact suggesting that pathogenesis enhanced the activities of the two　enzymes. The content of dopamine in banana peel was high (1.28 mg/g FW)at harvest, and then decreased markedly during the incidence of　anthracnose. Compared with the variety “63-1”,the activities of　chitinase and #beta#-1,3-glucanase and the content of dopamine were higher　in the variety “Black-oil shape”, which might be associated　with a stronger resistance to the diseases.

Key words: Banana;Anthracnose;Chitinase;#beta#-1;3-glucanase;Dopamine

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引用本文：

蒋跃明. 香蕉采后炭疽病发生与几丁酶、β-1,3-葡聚糖酶和多巴胺的关系[J]. 生理学报 1997; 49 (2): .

Juang Yueming. Incidence of anthracnose in relation to chitinase, beta-1,3-glucanase and dopamine of banana fruits after harvest. Acta Physiol Sin 1997; 49 (2): (in Chinese with English abstract).