Journal ArticleDOI
In vitro photoinduction of leaf tissue ofStreptocarpus nobilis
TLDR
The quantitativein vitro flowering response to the endogenous floral stimuli, resulting from photoinduction, could provide the basis of a bioassay for presumptive flower inducing chemicals.Abstract:
Leaf expiants from vegetative plants of the short-day plantStreptocarpus nobilis (C. B. Clarke) developed flower budsin vitro when cultured in 8 h photoperiods. Tn non-inductive photoperiods only vegetative buds were formed.In vitro photoinduction was demonstrated by giving the expiants short-day (SD) cycles and then transferring them to non-inductive photoperiods for expression of flowering. On medium containing 6-benzylaminopurine (BAP) organogenesis was initiated during the photoinductive treatments. Photoinduction of leaf tissue without adventitious bud development was obtained on medium without BAP. The photoinductive state of the leaf tissue was fairly stable, being expressed after 2–3 weeks in non-inductive photoperiods when adventitious buds were formed. The quantitativein vitro flowering response to the endogenous floral stimuli, resulting from photoinduction, could provide the basis of a bioassay for presumptive flower inducing chemicals.read more
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Journal ArticleDOI
High frequency direct plant regeneration from leaf and petals of Cape Primrose (Streptocarpus)
TL;DR: High frequency direct plant regeneration from leaf and petal explants was accomplished for the first time in Streptocarpus varieties and Scanning electron microscopy confirmedDirect plant regeneration without callus was accomplished.
Journal ArticleDOI
Effect of photoperiod and chlorogenic acid on morphogenesis in leaf discs of Streptocarpus nobilis
TL;DR: Chlorogenic acid enhances the regeneration of roots in all treatments tested, with the highest stimulation on induced leaf discs cultivated in short days, and an inhibitory effect was observed on the neo-formation of vegetative buds in non-induced explants maintained under short days.
Journal ArticleDOI
IAA Inhibition of in vitro Flowering of the Short-Day Plant Streptocarpus nobilis. An Effect on Maintenance of Induction
TL;DR: Mechanisms by which IAA could modulate the expression of the photoperiodically induced flowering signal are discussed and the degree of in vitro flowering correlated quantitatively with the number of short days received by the donor plant.
Journal ArticleDOI
When to branch: seasonal control of shoot architecture in trees.
TL;DR: In this paper, a review of recent progress in understanding of the genetic control of shoot architecture in perennials compared to in annuals is presented, including the role of a regulatory module consisting of antagonistic players terminal flower 1 (TFL1) and like-ap1 (LAP1) in the hybrid aspen.
Journal ArticleDOI
Adventitious bud production on explants of Begonia×hiemalis depends on the developmental state of the donor plant
John Simmonds,Sherman D. Nelson +1 more
TL;DR: The effects of the donor plant photoperiod and the developmental stage of the plant on organogenesis of petiole explants of Begonia×hiemalis cv.
References
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Book ChapterDOI
Physiology of flower initiation
TL;DR: The central problem of the physiology of flower initiation is to understand which factors cause a shoot meristem to become a flower primordium, and how they consummate their action.
Book
The physiology of flowering
TL;DR: The physiology of flowering is studied in detail in the context of flowering plants and their phytochemical properties.
Journal ArticleDOI
In vitro Control of de novo Flower, Bud, Root, and Callus Differentiation from Excised Epidermal Tissues
TL;DR: For most materials, the formation of buds or roots or flowers concerns different tissues, such as epidermis, perivascular or callus tissue of cambial origin, and each tissue maintains complex correlation with the surrounding tissues.
Journal ArticleDOI
Regulation of organogenesis in small explants of superficial tissue of Nicotiana tabacum L.
TL;DR: Small explants composed of 3–6 layers of epidermal and subepidermal cells excised from floral branches of Nicotiana tabacum are capable of de novo organogenesis by varying the auxin-cytokinin-sucrose ratio in the medium.
Flower formation as studied by grafting
TL;DR: In graft-compatible species the floral stimuli of SD and LD plants seemed to be identical, in contrast to Xanthium (SD plant) in which indirectly induced shoots could themselves transfer the floral stimulus to receptors.