A comparison of venation pattern development in wild type and a homeotic sepaloid petal mutant of Clarkia tembloriensis (Onagraceae)

Vascular system development in sepals, petals, and sepaloid petals was compared in wild-type and crinkled petal mutant plants of Clarkia tembloriensis. Patterns of vascularization in cleared whole mounts were visualized and traced under both brightfield and polarizing illumination. Wild-type sepals...

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Bibliographic Details
Published in:American journal of botany 1996-06, Vol.83 (6), p.712-716
Main Author: Smith-Huerta, N.L. (Miami University, Oxford, OH.)
Format: Article
Language:English
Subjects:
ANATOMIA DE LA PLANTA
ANATOMIE VEGETALE
Architecture
Botany
CALICE
CALIZ
Calyx
Clarkia tembloriensis
COROLA
COROLLE
Cotyledons
Developmental biology
ETAPAS DE DESARROLLO
EVOLUCION
EVOLUTION
MADURACION
MATURATION
MORFOGENESIS
MORPHOGENESE
MUTANT
MUTANTES
Mutation
ONAGRACEAE
Petals
Phenotypic traits
Plants
sepals
SISTEMA VASCULAR DE LA PLANTA
STADE DE DEVELOPPEMENT
Stamens
Structure and Development
SYSTEME VASCULAIRE DES PLANTES
TEXTURA
TEXTURE
Tracheary elements
TRACHEIDE
TRAQUEIDOS
VEINE
VENAS
venation pattern
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Summary:Vascular system development in sepals, petals, and sepaloid petals was compared in wild-type and crinkled petal mutant plants of Clarkia tembloriensis. Patterns of vascularization in cleared whole mounts were visualized and traced under both brightfield and polarizing illumination. Wild-type sepals exhibited a basipetal pattern of maturation, with tracheary elements maturing relatively rapidly. Mature sepals had three primary veins with numerous secondary veins. In contrast, wild-type petals exhibited an acropetal pattern of maturation, with tracheary elements maturing relatively slowly. The mature petals had only one primary vein with numerous secondary veins. Sepaloid (crinkled) petals combined characteristics of both wildtype sepals and wild-type petals. They exhibited a basipetal pattern of development and a relatively rapid maturation of the tracheary elements characteristic of wild-type sepals. Venation architecture in crinkled petal mutants showed a single primary vein with numerous secondary veins, similar to wild-type petals. The crinkled petal mutant fits the definition of a homeotic mutant in that the petal has assumed characteristics of the sepal. However, homeotic transformation from petal to sepal is incomplete since the crinkled petal still retains many of the characteristics of wild-type petals
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1996.tb12759.x