Journal ArticleDOI
Regulation of leaf form in Centaurea solstitialis L. I. Leaf development on whole plants in sterile culture
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It is proposed that the heteroblastic series is in part regulated by the endogenous levels of gibberellins, and this regulates the development of the adult leaf form in Centaurea solstitialis.Abstract:
Some factors controlling heteroblastic development in Centaurea solstitialis L. are reported and discussed. Whole plants were grown in sterile culture, and it was demonstrated that the level of available carbohydrates partly accounts for the heteroblastic series. Growing plants in sterile culture supplemented with gibberellic acid prevented the development of the adult leaf form, whereas Centaurea plants grown in media supplemented with Cycocel (CCC) formed adult leaves earlier than plants growing in media lacking CCC. When transferred to a GA-supplemented medium, plants already producing the adult leaf undergo transition to flowering, and all new leaves develop as the juvenile form. It is proposed that the heteroblastic series is in part regulated by the endogenous levels of gibberellins.read more
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Journal ArticleDOI
Cleistogamy: A tool for the study of floral morphogenesis, function and evolution
TL;DR: Evidence is presented to show that the CL flowers have modifications in their development which ensure self pollination, and a proposal is made for using this phenomenon of dimorphic flower production as a system for the study of floral morphogenesis, function and evolution.
Journal ArticleDOI
Sugar promotes vegetative phase change in Arabidopsis thaliana by repressing the expression of MIR156A and MIR156C
TL;DR: The results provide a molecular link between nutrient availability and developmental timing in plants, and suggest that sugar is a component of the leaf signal that mediates vegetative phase change.
Book ChapterDOI
Vegetative phase change and shoot maturation in plants.
TL;DR: Studies conducted over several decades indicate that carbohydrates have a significant effect on phase-specific leaf traits, and recent research suggests that sugar may be the leaf signal that promotes vegetative phase change.
Journal ArticleDOI
The specification of leaf identity during shoot development
TL;DR: Genes that regulate phase-specific aspects of leaf identity have been identified by mutational analysis in both maize and Arabidopsis, implying that the identity of a leaf at a particular position on the shoot may depend on when the leaf was initiated in relation to a temporal program of shoot development.
Journal ArticleDOI
Evolutionary and Environmental Forces Sculpting Leaf Development
Daniel H. Chitwood,Neelima Sinha +1 more
TL;DR: This review discusses recent literature demonstrating that distinct molecular pathways are modulated by specific environmental inputs, the output of which regulates leaf dissection and proposes a synthesis explaining both historical patterns in the paleorecord and conserved plastic responses in extant plants.
References
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Journal ArticleDOI
Growth and development in vitro of excised ovaries
TL;DR: A study of the physiological effects of elemental sulphur dust on citrus fruits and the inheritance of susceptibility to sulphur damage in families of seedling apples.