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Abstract
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The too many mouths and four lips mutations affect stomatal production in Arabidopsis.

M Yang, F D Sack
M Yang
Department of Plant Biology, Ohio State University, Columbus 43210-1293, USA.
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F D Sack
Department of Plant Biology, Ohio State University, Columbus 43210-1293, USA.
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Published December 1995. DOI: https://doi.org/10.1105/tpc.7.12.2227

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Abstract

Stomata regulate gas exchange through the aerial plant epidermis by controlling the width of a pore bordered by two guard cells. Little is known about the genes that regulate stomatal development. We screened cotyledons from ethyl methanesulfonate-mutagenized seeds of Arabidopsis by light microscopy to identify mutants with altered stomatal morphology. Two mutants, designated too many mouths (tmm) and four lips (flp), were isolated with extra adjacent stomata. The tmm mutation results in stomatal clustering and increased precursor cell formation in cotyledons and a virtual absence of stomata in the inflorescence stem. The flp mutation results in many paired stomata and a small percentage of unpaired guard cells in cotyledons. The double mutant (tmm flp) exhibits aspects of both parental phenotypes. Both mutations appear to affect stomatal production more than patterning or differentiation. tmm regulates stomatal production by controlling the formation, and probably the activity, of the stomatal precursor cell.

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The too many mouths and four lips mutations affect stomatal production in Arabidopsis.
M Yang, F D Sack
The Plant Cell Dec 1995, 7 (12) 2227-2239; DOI: 10.1105/tpc.7.12.2227

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The too many mouths and four lips mutations affect stomatal production in Arabidopsis.
M Yang, F D Sack
The Plant Cell Dec 1995, 7 (12) 2227-2239; DOI: 10.1105/tpc.7.12.2227
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The Plant Cell
Vol. 7, Issue 12
Dec 1995
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