Histological changes associated with acquisition of competence for shoot regeneration in leaf discs ofSaintpaufla ionantha xconfusa hybrid (African violet) cultured in vitro

Lo, Kuo-Chin; Sawhney, V. K.

doi:10.1007/bf01146786

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Shoots originating from subepidermal cells have been reported in tobacco stem explants (CreemersMolenaar et al 1994). The ability of different tissues to form shoots directly in other species has been demonstrated including leaf epidermis (Lo et al 1997), vascular cambium (Wenzel andBrown, 1991), cortex (Arai et al 1997) and cortical, subcortical (Twyford and Mantell, 1996) or epidermis or cortex of root (Knoll et al 1997).…”

Section: Ontogeny Of Shootsmentioning

confidence: 99%

Organogenesis from leaf and internode explants of Ophiorrhiza prostrata, an anticancer drug (camptothecin) producing plant

Beegum¹,

Martin²,

Zhang³

et al. 2007

Electron. J. Biotechnol.

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Section: Ontogeny Of Shootsmentioning

confidence: 99%

Organogenesis from leaf and internode explants of Ophiorrhiza prostrata, an anticancer drug (camptothecin) producing plant

Beegum¹,

Martin²,

Zhang³

et al. 2007

Electron. J. Biotechnol.

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“…The histological processes of shoot regeneration studied in some species of Streptocarpus section Saintpaulia (H.Wendl.) Mich.Möller & Haston confirms the direct initiation of shoots (Naylor & Johnson, 1937;Lo et al, 1997). Intriguingly, the ratio of regenerating leaf explants to non-regenerating leaf explants strongly depends on the auxin concentration in the culture media, while the concentration of CK has very little effect (Appelgren & Heide, 1972), although the number of buds per explant is greatly increased with the addition of CK (Chaudhury et al, 2010).…”

Section: Hormonal Effects On the Regeneration In Streptocarpusmentioning

confidence: 71%

Hormonal crosstalk in the regulation of meristem activity and the phyllomorph architecture in Streptocarpus (Gesneriaceae): a review

Nishii¹,

Spada²,

Michael³

2020

Rheedea

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Plants belonging to the family Gesneriaceae exhibit great diversity in shoot architecture. One genus within the family, Streptocarpus, encompasses species with different body plans that do not conform to the standard bauplan of angiosperms. These include features such as 'anisocotyly', the unequal cotyledon morphogenesis, and the 'phyllomorph' a leaf/shoot construct of which the development is governed by three meristems (groove meristem, petiolode meristem, basal meristem). In the extreme case, the plants only consist of one hugely enlarged cotyledon ('unifoliate' habit). Modification in the position and activities of the meristem are responsible for the morphological flexibility of the genus. This review summarises the interactions between hormones and developmental genes and compares these to model plants. Some mechanisms controlled by class 1 KNOX (KNOX1) genes appear to be conserved between plants with ordinary shoots and the Streptocarpus phyllomorph, while others have diverged. In particular, cytokinins and gibberellins appear to be important for meristem regulation to establish anisocotyly and the development of phyllomorphs in Streptocarpus through KNOX1 regulation. This is supported by expression patterns from hormone metabolism genes. The establishment of anisocotyly is based on an imbalance between cytokinins and gibberellins, causing a shift from apical to lateral dominance that involves the suppression of the microcotyledon and groove meristem and promotion of the basal meristem. We point out future perspectives in the study of Streptocarpus organogenesis. Streptocarpus may provide a system to study the functional evolution of plant form in relation to adaptation to diverse environmental conditions.

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Factors Influencing Somatic Embryogenesis Induction and Plant Regeneration with Particular Reference to Arabidopsis thaliana (L.) Heynh

Gaj¹

2004

Plant Growth Regulation

313

215

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Histological changes associated with acquisition of competence for shoot regeneration in leaf discs ofSaintpaufla ionantha xconfusa hybrid (African violet) cultured in vitro

Cited by 6 publications

References 16 publications

Organogenesis from leaf and internode explants of Ophiorrhiza prostrata, an anticancer drug (camptothecin) producing plant

Organogenesis from leaf and internode explants of Ophiorrhiza prostrata, an anticancer drug (camptothecin) producing plant

Hormonal crosstalk in the regulation of meristem activity and the phyllomorph architecture in Streptocarpus (Gesneriaceae): a review

Factors Influencing Somatic Embryogenesis Induction and Plant Regeneration with Particular Reference to Arabidopsis thaliana (L.) Heynh

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