Role of mycorrhizal infection in the growth and reproduction of wild vs. cultivated plants |
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Authors: | David R Bryla Roger T Koide |
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Institution: | (1) Department of Biology and Program in Ecology, The Pennsylvania State University, 16802 University Park, PA, USA;(2) Present address: Department of Plant Pathology, University of California, 95616 Davis, CA, USA |
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Abstract: | Summary An experiment was conducted to determine whether wild accessions and cultivars ofLycopersicon esculentum Mill. differed in inherent morphological, physiological or phenological traits and whether such differences would result
in variation in response to vesicular-arbuscular mycorrhizal infection. While distinctions between wild accessions and cultivars
were apparent (the cultivars generally had higher phosphorus use efficiencies and shorter lifespans than the wild accessions)
and the cultivars were, as a group, more responsive to mycorrhizal infection than the wild accessions, there was significant
variation among wild accessions and among cultivars in response to infection. Regardless of cultivation status, non-mycorrhizal
plant root density was significantly negatively correlated with response to infection. Phosphorus use efficiency was generally
not significantly correlated with response to infection. Mycorrhizal infection decreased phosphorus use efficiency in all
accessions, but had variable effects on root density, depending upon accession and time. Finally, the vegetative response
was not necessarily of the same magnitude as the reproductive response. |
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Keywords: | Vesicular-arbuscular mycorrhiza Lycopersicon esculentum Mycorrhizal dependency Adaptation to infertility Mineral nutrition |
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