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Sugar Beet Nematode (Heterodera Schachtii) Reared On Axenic Beta Vulgaris Root Explants

Sugar Beet Nematode (Heterodera Schachtii) Reared On Axenic Beta Vulgaris Root Explants SUGAR BEET NEMATODE (HETERODERA SCHACHTII) REARED ON AXENIC BETA VULGARIS ROOT EXPLANTS II. SELECTED ENVIRONMENTAL AND NUTRITIONAL FACTORS AFFECTING DEVELOPMENT AND SEX-RATIO 1) BY RUTH N. J'OHNSON and D. R. VIGLIERCHIO Department of Nematology, University of California, Davis, U.S.A. Development of Heterodera schachtii on excised Beta vulgaris roots was influenced by several environmental and nutritional factors. Sex-ratio was not influenced by these same factors. Optimum temperature for rate of development was 25°C. Increased concentration of macronutrient salts, vitamins and sucrose in the medium increased the rate of development. Adult female body size increased with an increase in sucrose concentration but not with macronutrient salts and vitamins. Evidence indicates a differential ability of the sexes to develop to maturity. Reproduction of Heterodera schachtli, a bisexual plant parasitic nematode, re- quires the presence of males in the population (Golden, 1959; Triantaphyllou & Hirschmann, 1964). Environmental factors can bring about disproportionate sex- ratios in H. ro.rtochieyz.ri.r, where more males developed on lateral potato roots than on primary roots (Ellenby, 1954). There was also an increased ratio of males to females with an increasing intensity of attack. Sex-ratios are reported to vary with the host plant (Molz, 1920). Kampfe & Kerstan (1964) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Sugar Beet Nematode (Heterodera Schachtii) Reared On Axenic Beta Vulgaris Root Explants

JOHNSON, Ruth N.; Viglierchio, D.R.
Nematologica , Volume 15 (1): 9 – Jan 1, 1969
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529269X00173
Publisher site
See Article on Publisher Site

Abstract

SUGAR BEET NEMATODE (HETERODERA SCHACHTII) REARED ON AXENIC BETA VULGARIS ROOT EXPLANTS II. SELECTED ENVIRONMENTAL AND NUTRITIONAL FACTORS AFFECTING DEVELOPMENT AND SEX-RATIO 1) BY RUTH N. J'OHNSON and D. R. VIGLIERCHIO Department of Nematology, University of California, Davis, U.S.A. Development of Heterodera schachtii on excised Beta vulgaris roots was influenced by several environmental and nutritional factors. Sex-ratio was not influenced by these same factors. Optimum temperature for rate of development was 25°C. Increased concentration of macronutrient salts, vitamins and sucrose in the medium increased the rate of development. Adult female body size increased with an increase in sucrose concentration but not with macronutrient salts and vitamins. Evidence indicates a differential ability of the sexes to develop to maturity. Reproduction of Heterodera schachtli, a bisexual plant parasitic nematode, re- quires the presence of males in the population (Golden, 1959; Triantaphyllou & Hirschmann, 1964). Environmental factors can bring about disproportionate sex- ratios in H. ro.rtochieyz.ri.r, where more males developed on lateral potato roots than on primary roots (Ellenby, 1954). There was also an increased ratio of males to females with an increasing intensity of attack. Sex-ratios are reported to vary with the host plant (Molz, 1920). Kampfe & Kerstan (1964)

Journal

Nematologica – Brill

Published: Jan 1, 1969

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