Vascular Disease of Plants

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Vascular Disease of Plants


any one of several diseases characterized by the loss of turgor in an entire plant or in certain parts of a plant as a result of functional disturbances of the vascular system.

Plants growing in soil with a low water content may develop vascular diseases. Other causes of vascular diseases include the disruption of the activity of the root system and the blocking of the vascular system with the mycelium of phytopathogenic fungi or accumulations of phytopathogenic bacteria. Other contributing factors may be the toxic action of parasites on the tissues of the plant-host and the formation in the vessels of tyloses (protoplastic swellings of the parenchymatous cells of xylem, which grow into the vessels).

The most common vascular diseases of plants are tracheomy-coses and tracheobacterioses. Tracheomycoses are a group of diseases caused by pathogenic fungi. They include mal secco, Dutch elm disease, and fusarium wilt and verticilliosis in cotton and many other plants. Tracheobacterioses are caused by phytopathogenic bacteria. They include bacterial wilt in Solanaceae, bacterial cancer in tomatoes, and ring rot in potatoes. Transverse and longitudinal sections of the tissues of a diseased plant clearly show a darkening of plant vessels.

Control measures include the destruction of plant remains, the selection of resistant varieties, and the implementation of agrotechnical measures that increase plant resistance to vascular diseases.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Laurel wilt is a vascular disease of plants in the Laurel family (Lauraceae) that has caused extensive mortality of redbay (Persea borbonia (L.) Spreng) trees in South Carolina, Georgia, and Florida.
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