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Home Journals Annals of Botany Development of the midrib xylem during leaf expansion

Development of the midrib xylem during leaf expansion

Development of the midrib xylem during leaf expansion
Development of the midrib xylem during leaf expansion

The water-transport capacity of leaf venation is positively related to the leaf-lamina area, because the number and diameter of vein-xylem conduits are properly controlled to match the lamina area. Taneda and Terashima investigate how these co-ordinated relationships are achieved by studying the midrib xylem of leaves of tobacco, Nicotiana tabacum, and find that the developmental rates of the lamina area and the midrib-xylem characteristics change in a co-ordinated manner. Exogenous application suggests that IAA derived from the leaf lamina plays a crucial role in the development of the leaf venation.

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