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The Effects of Gamma Radiation On Heterodera Rostochiensis

The Effects of Gamma Radiation On Heterodera Rostochiensis THE EFFECTS OF GAMMA RADIATION ON HETERODERA ROSTOCHIENSIS BY K. EVANS Rothamsted Experimental Station, Haipenden, Herts., England Cysts, second stage larvae and adult males and females of H. rostochiensis were exposed to 2, 4, 8, 16, 32 and 64 kilorads of gamma radiation. Hatching from cysts exposed to potato root-diffusate for 3 days before irradiation was decreased, and some eggs were killed after only 2 kilorads, but hatching from air-dried cysts was stimulated by the smaller doses in one experiment. Irradiation of second stage larvae had no effect on their activity, but irradiation of either cysts or larvae impaired development of the F1 generation: fewer cysts with fewer eggs than those in unirradiated controls were formed, and many of the eggs lacked normal larvae. Adults were more resistant than hatched larvae or larvae within cysts to irradiation. Small doses affected the fertility of adult females more than that of males, probably because the primary oocytes continue dividing after mating, whereas all the sperm is formed by the time the males leave the roots. Larvae from irradiated cysts competed poorly with those from unirradiated cysts when potato plants were inoculated with mixtures of the two. Various effects of ionising http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Effects of Gamma Radiation On Heterodera Rostochiensis

Evans, K.
Nematologica , Volume 16 (2): 11 – Jan 1, 1970
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529270X00306
Publisher site
See Article on Publisher Site

Abstract

THE EFFECTS OF GAMMA RADIATION ON HETERODERA ROSTOCHIENSIS BY K. EVANS Rothamsted Experimental Station, Haipenden, Herts., England Cysts, second stage larvae and adult males and females of H. rostochiensis were exposed to 2, 4, 8, 16, 32 and 64 kilorads of gamma radiation. Hatching from cysts exposed to potato root-diffusate for 3 days before irradiation was decreased, and some eggs were killed after only 2 kilorads, but hatching from air-dried cysts was stimulated by the smaller doses in one experiment. Irradiation of second stage larvae had no effect on their activity, but irradiation of either cysts or larvae impaired development of the F1 generation: fewer cysts with fewer eggs than those in unirradiated controls were formed, and many of the eggs lacked normal larvae. Adults were more resistant than hatched larvae or larvae within cysts to irradiation. Small doses affected the fertility of adult females more than that of males, probably because the primary oocytes continue dividing after mating, whereas all the sperm is formed by the time the males leave the roots. Larvae from irradiated cysts competed poorly with those from unirradiated cysts when potato plants were inoculated with mixtures of the two. Various effects of ionising

Journal

Nematologica – Brill

Published: Jan 1, 1970

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