Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 12:558-561 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Variations in Leaf Resistances, Net Photosynthesis, and Tolerance to the Beet Yellows Virus Among Varieties of Sugar Beet (Beta vulgaris L.)1

A. E. Hall, W. F. Hunt and R. S. Loomis2

Tolerance of sugar beet (Beta vulgaris L.) varieties to the Beet Yellows Virus was associated with maintenance of low leaf resistances to the transport of gases during infection. In extreme cases net photosynthesis at light saturation was inversely related to leaf resistance. The potential usage of the constant pressure, mass flow porometer in selecting for maintenance of low leaf resistances was investigated.

Key Words: Plant-virus interaction • Leaf porometer

1 Contribution from the Department of Agronomy and Range Science, University of California, Davis, Calif. 95616. This work supported by grants from the California Sugar Beet Industry and from NSF (GB-18541).

2 Assistant Professor, Department of Plant Sciences, University of California, Riverside, Calif. 92502; Research Assistant and Professor, Department of Agronomy and Range Science, University of California, Davis, Calif. 95616.

Received for publication December 17, 1971.




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