A complex case of simple leaves: indeterminate leaves co-express ARP and KNOX1 genes
Journal
Development Genes and Evolution
Journal Volume
220
Journal Issue
1-2
44563
Pages
25-40
Date Issued
2010
Date
2010
Author(s)
Nishii, Kanae
Moeller, Michael
Kidner, Catherine
Spada, Alberto
Mantegazza, Raffaella
Nagata, Toshiyuki
Abstract
The mutually exclusive relationship between ARP and KNOX1 genes in the shoot apical meristem and leaf primordia in simple leaved plants such as Arabidopsis has been well characterized. Overlapping expression domains of these genes in leaf primordia have been described for many compound leaved plants such as Solanum lycopersicum and Cardamine hirsuta and are regarded as a characteristic of compound leaved plants. Here, we present several datasets illustrating the co-expression of ARP and KNOX1 genes in the shoot apical meristem, leaf primordia, and developing leaves in plants with simple leaves and simple primordia. Streptocarpus plants produce unequal cotyledons due to the continued activity of a basal meristem and produce foliar leaves termed "phyllomorphs" from the groove meristem in the acaulescent species Streptocarpus rexii and leaves from a shoot apical meristem in the caulescent Streptocarpus glandulosissimus. We demonstrate that the simple leaves in both species possess a greatly extended basal meristematic activity that persists over most of the leaf's growth. The area of basal meristem activity coincides with the co-expression domain of ARP and KNOX1 genes. We suggest that the co-expression of ARP and KNOX1 genes is not exclusive to compound leaved plants but is associated with foci of meristematic activity in leaves. © 2010 Springer-Verlag.
Subjects
ARP; Gesneriaceae; KNOX1; Meristem; Streptocarpus
SDGs
Other Subjects
actin related protein; histone H4; homeodomain protein; Knotted like homeobox protein 1; unclassified drug; homeodomain protein; Knox1 protein, plant; vegetable protein; apical meristem; article; controlled study; developmental gene; gene expression profiling; gene function; leaf development; leaf growth; molecular cloning; morphogenesis; nonhuman; plant; plant genetics; plant leaf; priority journal; protein expression; Streptocarpus glandulosissimus; Streptocarpus rexii; amino acid sequence; Cardamine; gene expression regulation; genetics; growth, development and aging; meristem; metabolism; molecular genetics; plant gene; Amino Acid Sequence; Cardamine; Gene Expression Regulation, Plant; Genes, Plant; Homeodomain Proteins; Meristem; Molecular Sequence Data; Plant Leaves; Plant Proteins; Arabidopsis; Cardamine hirsuta; Gesneriaceae; Lycopersicon esculentum; Phyllomorpha; Streptocarpus; Streptocarpus glandulosissimus; Streptocarpus rexii; Amino Acid Sequence; Cardamine; Gene Expression Regulation, Plant; Genes, Plant; Homeodomain Proteins; Meristem; Molecular Sequence Data; Plant Leaves; Plant Proteins
Type
journal article
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