Homologies in leaf form inferred from KNOXI gene expression during development.
KNOTTEDI-like homeobox (KNOXI) genes regulate development of the leaf from the shoot apical meristem (SAM) and may regulate leaf form. We examined KNOXI expression in SAMs of various vascular plants and found that KNOXI expression correlated with complex leaf primordia. However, complex primordia may mature into simple leaves. Therefore, not all simple leaves develop similarly, and final leaf morphology may not be an adequate predictor of homology.
Bharathan
Geeta
G
Department of Ecology and Evolution, State University of New York, Stony Brook, NY 11794-5245, USA.
Goliber
Thomas E
TE
Moore
Christopher
C
Kessler
Sharon
S
Pham
Thinh
T
Sinha
Neelima R
NR
D005075:Biological Evolution; D019607:Brassicaceae / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D032462:Cycadopsida / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D015536:Down-Regulation; D018506:Gene Expression Regulation, Plant; D005801:Genes, Homeobox; D017343:Genes, Plant; D018398:Homeodomain Proteins / Q000235:genetics* / Q000378:metabolism; D008027:Light; D019684:Magnoliopsida / Q000235:genetics / Q000254:growth & development; D018519:Meristem / Q000235:genetics* / Q000378:metabolism; D009024:Morphogenesis; D010802:Phylogeny; D063245:Plant Development; D018515:Plant Leaves / Q000254:growth & development*; D010940:Plant Proteins; D010944:Plants / Q000235:genetics* / Q000378:metabolism
D018398:Homeodomain Proteins; C405985:Knox1 protein, plant; D010940:Plant Proteins