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Can hypodermal passage cell distribution limit root penetration by mycorrhizal fungi?

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Title: Can hypodermal passage cell distribution limit root penetration by mycorrhizal fungi?
Authors: Sharda, J. N.1, Koide, R. T.1,2,3 rxk13@psu.edu
Source: New Phytologist. Nov2008, Vol. 180 Issue 3, p696-701. 6p. 1 Diagram, 2 Charts, 3 Graphs.
Subjects: Vesicular-arbuscular mycorrhizas, Plant colonization, Plant cells & tissues, Plant variation, Mycorrhizal fungi, Plant root anatomy
Abstract: • The basis for significant interspecific variability in colonization by arbuscular mycorrhizal fungi is poorly understood. Limited evidence suggests that, for species with a dimorphic hypodermis, colonization of the root cortex occurs only through hypodermal passage cells. Therefore, the hypothesis that interspecific variability in mycorrhizal colonization is accounted for by interspecific variation in passage cell distribution was tested. • The arbuscular mycorrhizal colonization and distribution of fungal penetration points and hypodermal passage cells in the root systems of eight species (seven plant families) possessing a dimorphic hypodermis were characterized. • Mycorrhizal fungal penetration of the hypodermis occurred exclusively through passage cells. Moreover, the proportion of root length with passage cells explained nearly 99% of the variability among the eight plant species in the proportion of root length with penetration points. • In dimorphic hypodermal species, passage cells appear to be key determinants of mycorrhizal colonization because they are the cells through which fungal penetration of the hypodermis occurs. Variation among such species in mycorrhizal colonization may be at least partly determined by variation in the proportion of root length with passage cells. [ABSTRACT FROM AUTHOR]
Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Can hypodermal passage cell distribution limit root penetration by mycorrhizal fungi?
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  Data: <searchLink fieldCode="AR" term="%22Sharda%2C+J%2E+N%2E%22">Sharda, J. N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Koide%2C+R%2E+T%2E%22">Koide, R. T.</searchLink><relatesTo>1,2,3</relatesTo><i> rxk13@psu.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22New+Phytologist%22">New Phytologist</searchLink>. Nov2008, Vol. 180 Issue 3, p696-701. 6p. 1 Diagram, 2 Charts, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Vesicular-arbuscular+mycorrhizas%22">Vesicular-arbuscular mycorrhizas</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+colonization%22">Plant colonization</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+cells+%26+tissues%22">Plant cells & tissues</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+variation%22">Plant variation</searchLink><br /><searchLink fieldCode="DE" term="%22Mycorrhizal+fungi%22">Mycorrhizal fungi</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+root+anatomy%22">Plant root anatomy</searchLink>
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  Data: • The basis for significant interspecific variability in colonization by arbuscular mycorrhizal fungi is poorly understood. Limited evidence suggests that, for species with a dimorphic hypodermis, colonization of the root cortex occurs only through hypodermal passage cells. Therefore, the hypothesis that interspecific variability in mycorrhizal colonization is accounted for by interspecific variation in passage cell distribution was tested. • The arbuscular mycorrhizal colonization and distribution of fungal penetration points and hypodermal passage cells in the root systems of eight species (seven plant families) possessing a dimorphic hypodermis were characterized. • Mycorrhizal fungal penetration of the hypodermis occurred exclusively through passage cells. Moreover, the proportion of root length with passage cells explained nearly 99% of the variability among the eight plant species in the proportion of root length with penetration points. • In dimorphic hypodermal species, passage cells appear to be key determinants of mycorrhizal colonization because they are the cells through which fungal penetration of the hypodermis occurs. Variation among such species in mycorrhizal colonization may be at least partly determined by variation in the proportion of root length with passage cells. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/j.1469-8137.2008.02600.x
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        Text: English
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      – SubjectFull: Plant colonization
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      – SubjectFull: Plant cells & tissues
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      – SubjectFull: Plant variation
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      – SubjectFull: Mycorrhizal fungi
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      – SubjectFull: Plant root anatomy
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              Text: Nov2008
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