Biology of the Acacia gall rust, Uromycladium tepperianum

Biology of the Acacia gall rust, Uromycladium tepperianum Germinating teliospores of Uromycladium tepperianum formed penetration pegs, which directly penetrated host epidermal cells, on the tip cell of three‐celled germ tubes. Diploid nuclei within teliospores appeared to divide soon after germination commenced. Only one of the daughter nuclei moved out of the teliospores with the developing germ tubes. Reactions of seedlings inoculated with teliospores from different host species and differences in teliospore dimensions indicated that distinct genotypes of U. tepperianum adapted to particular host species occur in Australia. Limited hyphal growth occurred in two of 20 African Acacia spp. inoculated with teliospores from Acacia saligna. Fungal development was, however, restricted by necrosis of surrounding host cells. U. tepperianum appears to be suitably host‐specific for use as a biological control agent against Ac. saligna, a weed in South Africa. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Pathology Wiley

Biology of the Acacia gall rust, Uromycladium tepperianum

Plant Pathology, Volume 36 (1) – Mar 1, 1987

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Publisher
Wiley
Copyright
Copyright © 1987 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0032-0862
eISSN
1365-3059
DOI
10.1111/j.1365-3059.1987.tb02183.x
Publisher site
See Article on Publisher Site

Abstract

Germinating teliospores of Uromycladium tepperianum formed penetration pegs, which directly penetrated host epidermal cells, on the tip cell of three‐celled germ tubes. Diploid nuclei within teliospores appeared to divide soon after germination commenced. Only one of the daughter nuclei moved out of the teliospores with the developing germ tubes. Reactions of seedlings inoculated with teliospores from different host species and differences in teliospore dimensions indicated that distinct genotypes of U. tepperianum adapted to particular host species occur in Australia. Limited hyphal growth occurred in two of 20 African Acacia spp. inoculated with teliospores from Acacia saligna. Fungal development was, however, restricted by necrosis of surrounding host cells. U. tepperianum appears to be suitably host‐specific for use as a biological control agent against Ac. saligna, a weed in South Africa.

Journal

Plant PathologyWiley

Published: Mar 1, 1987

References

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