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Development. 2001 Jul;128(14):2747-53.

Specification of bundle sheath cell fates during maize leaf development: roles of lineage and positional information evaluated through analysis of the tangled1 mutant.

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  • 1Department of Molecular, Cellular and Developmental Biology, Yale University, PO Box 208104, New Haven, CT 06520, USA.

Abstract

In leaves of the maize tangled1 (tan1) mutant, clusters of bundle sheath (BS)-like cells extend several cells distant from the veins, in association with the single layer of BS cells around the vein. We show that the BS-like cell clusters in tan1 leaves result from the continued division of cells in the procambial/BS cell lineage that do not divide further in wild-type leaves. The ectopic BS-like cells accumulate the BS marker NADP-dependent malic enzyme but not the mesophyll cell marker phosphoenolpyruvate carboxylase, and exhibit thickened walls, suggesting that they differentiate as C4-type BS cells. We propose that bundle sheath cell fate can be conferred on some derivatives of procambial cell divisions in a manner that is heritable through multiple cell divisions and is position-independent.

PMID:
11526080
[PubMed - indexed for MEDLINE]
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