Pistillate and staminate flower development in dioecious Pistacia vera (Anacardiaceae)

The development of staminate and pistillate flowers in the dioecious tree species Pistacia vera L. (Anacardiaceae) was studied by scanning electron microscopy with the objective of determining organogenetic patterns and phenology of floral differentiation. Flower primordia are initiated similarly in...

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Bibliographic Details
Published in:American journal of botany 1996-06, Vol.83 (6), p.759-766
Main Authors: Hormaza, J. I., Polito, V. S.
Format: Article
Language:English
Subjects:
Anacardiaceae
anatomia de la planta
anatomie vegetale
biological development
Biological taxonomies
Botany
Calyx
Carpels
cell structure
desarrollo biologico
desarrollo estacional
developpement biologique
developpement saisonnier
dioecy
estructura celular
etapas de desarrollo de la planta
Female flowers
fenologia
fleur
floral development
flores
Flowering
Flowers
Meristems
organogenese
organogenesis
phenologie
phenology
pistachio
Pistacia vera
plant anatomy
plant developmental stages
Plant growth
Plant reproduction
Plants
Reproductive Biology
seasonal development
sex
sexe
sexo
stade de developpement vegetal
Stamens
structure cellulaire
ultraestructura
ultrastructure
variedades
variete
varieties
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Summary:The development of staminate and pistillate flowers in the dioecious tree species Pistacia vera L. (Anacardiaceae) was studied by scanning electron microscopy with the objective of determining organogenetic patterns and phenology of floral differentiation. Flower primordia are initiated similarly in trees of both sexes. Stamen and carpel primordia are initiated in both male and female flowers, and the phenology of organ initiation is essentially identical for flowers of both sexes. Vestigial stamen primordia arise at the flanks of pistillate flower apices at the same time functional stamens are initiated in the staminate flowers. Similarly, a vestigial carpel is initiated in staminate flowers at the same time the primary, functional carpel is initiated in pistillate flower primordia. Differences between the two sexes become apparent early in development as, in both cases, development of organs of the opposite sex becomes arrested at the primordial stage. Male flowers produce between four and six mature functional stamens and female flowers produce a gynoecium with one functional and two sterile carpels.
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1996.tb12765.x