Flower Bud Differentiation and Development in Cattleya labiata Lindl.

Rotor, Gavino; MacDaniels, L. H.

doi:10.2307/2437839

Cited by 6 publications

(6 citation statements)

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“…One petal is specialized into a labellum. Our characterization of tissue and cellular differentiation in three Paphiopedilum species is consistent with that in Cattleya , Phalaenopsis and Dendrobium ( Rotor and MacDaniels 1951 ; Wei et al 2010 ; Zheng et al 2017 ). Our anatomical analysis indicated that the bracts emerge first in the inflorescence primordium; the flower primordia invaginates, forming two lobes at the base of bracts next to the axis; the upper lobe develops a syn-sepal and labellum, whereas the lower lobe forms the dorsal-sepal, two lateral petals and the column.…”

Section: Discussionsupporting

confidence: 85%

“…Floral bud development in Paphiopedilum species is consistent with that of species in Oncidium , Phalaenopsis , Chloraea and Dendrobium , but not with Cattleya ( Rotor and MacDaniels 1951 ; Tanaka et al 1986 ; Wei et al 2010 ; Steinfort et al 2012 ; Zheng et al 2017 ). In orchids, six tepals of a flower are divided into two whorls.…”

Section: Discussionmentioning

confidence: 57%

“…Our anatomical analysis indicated that the bracts emerge first in the inflorescence primordium; the flower primordia invaginates, forming two lobes at the base of bracts next to the axis; the upper lobe develops a syn-sepal and labellum, whereas the lower lobe forms the dorsal-sepal, two lateral petals and the column. In Cattleya labiate , in contrast, the two ventral sepals and two lateral petals are derived from the upper lobe ( Rotor and MacDaniels 1951 ). During the growth of floral organ, the ovary or pedicel twists in such a way the inverts the floral bud so that at the time of anthesis the labellum is below the column while the latter is turned away from the axis ( Rotor and MacDaniels 1951 ; Arditti 2005 ; Chen et al 2009 ).…”

Section: Discussionmentioning

confidence: 99%

“…Apical buds were sectioned longitudinally (5–8 μm thick) on a Leica RM2126RT rotary microtome (Leica Inc., Bensheim, Germany) and stained with safranine and fast green ( Wei et al 2010 ). The morphology of floral buds was observed and photographed with a light microscope (Leica DM2500, Leica Microsystem Vertrieb GmbH, Wetzlar, Germany), and identified by referring to the study of Cattleya , Cypripedium , P. armeniacum , Phalaenopsis ( Rotor and MacDaniels 1951 ; Kurzweil 1993 ; Pi et al 2009 ; Wei et al 2010 ).…”

Section: Methodsmentioning

confidence: 99%

“…In Orchidaceae, floral bud differentiation has been investigated in several taxa, including Cattleya , Bletilla striata , Cypripedium , Phragmipedium , Oncidium , Apostasioideae, Chloraea , Telipogon , Phalaenopsis and Dendrobium ( Rotor and MacDaniels 1951 ; Sano et al 1961 ; Tanaka et al 1986 ; Kurzweil 1993 ; Kocyan and Endress 2001 ; Weng et al 2002 ; Pabón-Mora and González 2008 ; Wei et al 2010 ; Steinfort et al 2012 ; Wang et al 2019 ; Zhang et al 2019 ). In general, the shoot apical meristem begins to differentiate, initiating the development of floral organs after flowering induction is completed.…”

Section: Introductionmentioning

confidence: 99%

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Is seasonal flowering time of Paphiopedilum species caused by differences in initial time of floral bud differentiation?

et al. 2021

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Members of the genus Paphiopedilum are world-famous for their large, colourful flowers, unique floral morphology and long floral lifespan. Most Paphiopedilum species bloom in spring or autumn. The control of flowering time is of great significance to the commercial production of floral crops, because it affects the sales and prices of flowers. However, the mechanism that regulates when Paphiopedilum species bloom is unclear. In the present study, floral bud initiation and development of P. micranthum (spring-flowering species with one flower per stalk), P. dianthum (autumn-flowering species with multiple flowers per stalk) and P. henryanum (autumn-flowering species with one flower per stalk) were investigated by morphological and anatomical methods. We divided Paphiopedilum floral bud differentiation into six phases: the initiation of differentiation, inflorescence primordium differentiation, flower primordium differentiation, sepal primordium differentiation, petal primordium differentiation and column primordium differentiation. We found that the timing of floral bud differentiation for the three species was synchronized when experiencing the same environment, while the period from initiation to flowering largely differed. In addition, initiation of floral bud differentiation in P. dianthum was earlier at a warmer environment. The difference in flowering time of three species was mainly caused by the duration of floral bud development, rather than the initiation time. The findings were of great significance for the cultivation and flowering regulation of Paphiopedilum species.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Is seasonal flowering time of Paphiopedilum species caused by differences in initial time of floral bud differentiation?

et al. 2021

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Recent Advances in Botany, Propagation, and Physiology of Orchids

Sheehan

1983

Horticultural Reviews

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Postpollination Phenomena in Orchid Flowers. V. Participation by the Rostellum and Gynostemium Tip

Arditti

Flick

1974

American J of Botany

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Removal of the rostellum following pollination does not prevent stigmatic closure in Cymbidium flowers and has a minimal effect on straightening of the gynostemium (column). However, this treatment does depress anthocyanin levels in both gynostemia and labella. Excision of the rostellum 30 or 60 min after pollination has a more pronounced effect than removal after 150 min. Stigmatic closure is not inhibited by removal of the gynostemium tip, but column swelling is reduced. These findings are discussed relative to rostellar functions and theories regarding their origin.

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Flower Bud Differentiation and Development in Cattleya labiata Lindl.

Cited by 6 publications

References 0 publications

Is seasonal flowering time of Paphiopedilum species caused by differences in initial time of floral bud differentiation?

Is seasonal flowering time of Paphiopedilum species caused by differences in initial time of floral bud differentiation?

Recent Advances in Botany, Propagation, and Physiology of Orchids

Postpollination Phenomena in Orchid Flowers. V. Participation by the Rostellum and Gynostemium Tip

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