Original Research

Anomalous vascular bundle sheath structure in Alloteropsis semialata leaf blades

R. P. Ellis
Bothalia | Vol 11, No 3 | a1460 | DOI: https://doi.org/10.4102/abc.v11i3.1460 | © 1974 R. P. Ellis | This work is licensed under CC Attribution 4.0
Submitted: 12 November 1974 | Published: 04 December 1974

About the author(s)

R. P. Ellis, Botanical Research Institute. Department of Agricultural Technical Services, South Africa

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Abstract

Alloteropsis semialata (R.Br.) Hitchc. of the Paniceae, would be expected to exhibit typical eupanicoid leaf anatomy with a single bundle sheath of large parenchymatous cells with specialized
chloroplasts and radially-arranged chlorenchyma. Specimens from South Africa showed the following bundle-sheath and mesophyll deviations from the generalized panicoid model: 1. bundle
sheath is double; 2. inner bundle sheath is composed of large cells with specialized chloroplasts; 3. outer sheath consists of many smaller cells with few, or without chloroplasts; 4. outline of the third-
order bundles is tall and narrow; 5. chlorenchyma is not radially arranged. Other specimens of A. semialata, however, were found to have a large-celled outer bundle sheath devoid of chloroplasts
and with indistinctly radiate chlorenchyma.

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Crossref Citations

1. Evolutionary implications of C3–C4 intermediates in the grass Alloteropsis semialata
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