Platte Valley Yellows,a chlorotic condition of soybeans: Symptoms and preliminary chemical analyses |
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| Authors: | John R Porter Michael F Allen Leslie C Lane Michael G Boosalis |
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| Institution: | (1) Department of Plant Pathology, University of Nebraska, 68583 Lincoln, NE, USA;(2) Present address: Department of Biology, St. Lawrence University, 13617 Canton, NY, USA;(3) Present address: Ecosystem Reconstruction Program, College of Natural Resources, UMC 52, Utah State University, 84322 Logan, UT, USA |
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| Abstract: | Summary A chlorotic condition of soybeans in the river valleys of eastern Nebraska was studied. The pattern of chlorosis, presence
of petiolar necrosis, reductions in rhizobial and mycorrhizal infection, and plant and soil chemical analyses suggest that
the condition is more complex than normal iron deficiency chlorosis or other mineral deficiencies or toxicities. Nodulation
is almost totally inhibited in affected plants. Mycorrhizal fungi, while able to infect early in the season, do not persist
on affected plants. Breakdown of endodermis was observed in the roots of affected plants. The factors contributing to this
condition have not yet been determined.
Published with the approval of the director as Paper No. 5672, Journal Series, Nebraska Agricultural Experiment Station. |
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| Keywords: | Glycine max Iron deficiency Mycorrhizae Nodulation Platte Valley Yellows Rhizobium Soybeans |
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