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Journal Article

Effects of Light on Root Growth, Nodulation, and Apogeotropism of Zamia pumila L. Seedlings in Sterile Culture

David Webb
American Journal of Botany
Vol. 69, No. 2 (Feb., 1982), pp. 298-305
Stable URL: http://www.jstor.org/stable/2443017
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Light on Root Growth, Nodulation, and Apogeotropism of Zamia pumila L. Seedlings in Sterile Culture
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Abstract

Secondary root nodulation and apogeotropism of Zamia pumila L seedlings grown axenically on modified White's minerals with 2% sucrose at pH 5.7 was caused by light. Light also inhibited primary and secondary root elongation as well as secondary root production. Light-induced growth inhibition and nodulation were greatest at high light intensities. Apogeotropism was more frequent at low light intensities.

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