Plant growth regulators and the orchid cut-flower industry

Hew, C. S.; Clifford, P. E.

doi:10.1007/bf00024843

Cited by 34 publications

(19 citation statements)

References 38 publications

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“…However, in some orchid nurseries, floral bud drop has become a big problem affecting quality and commercial value of the plants. Numerous studies have reported floral bud drop in popular tropical orchids grown for cut flowers, and consequently, many farmers in South-East Asia have stopped growing Aranthera Beatnice Eng and Dendrobium Sri Siam because of this bud drop problem (Hew and Clifford 1993). Less information is available on bud drop in miniature orchids.…”

Section: Introductionmentioning

confidence: 99%

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Effects of ethylene and 1-MCP (1-methylcyclopropene) on bud and flower drop in mini Phalaenopsis cultivars

et al. 2009

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Phalaenopsis frequently exhibits bud drop during production and in response to adverse postharvest conditions. The effect of exogenous ethylene on bud drop of mini Phalaenopsis was studied and ethylene sensitivity of four cultivars was compared. Water content, membrane permeability and ABA (abscisic acid) content in floral buds and flowers were determined after ethylene treatment. Exogenous ethylene induced flower bud drop in all testedPhalaenopsis cultivars and the different cultivars showed distinct differences in ethylene sensitivity. The cultivar Sogo 'Vivien' exhibited the highest bud drop, water loss and change in membrane permeability in floral petals, while Sogo 'Berry' showed the lowest sensitivity. The ethylene inhibitor 1-MCP (1-methylcyclopropene) reduced ethylene-induced floral bud drop in the cultivar Sogo 'Yenlin'. ABA content in floral buds was increased in response to ethylene and 1-MCP pretreatment inhibited the ethylene-induced increase in ABA levels efficiently. This finding suggests that the observed increase in ABA content during bud drop was mediated by ethylene. The interaction between ABA and ethylene is discussed.

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Section: Introductionmentioning

confidence: 99%

“…It is well known that floral buds of various orchids are sensitive to ethylene (Hew and Clifford 1993). In Dendrobium, it has been observed that abscission of floral buds and flowers took place frequently during transportation in sealed cardboard boxes.…”

Section: Introductionmentioning

confidence: 99%

Effects of ethylene and 1-MCP (1-methylcyclopropene) on bud and flower drop in mini Phalaenopsis cultivars

et al. 2009

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“…Ethylene has a regulatory effect, at the transcriptional and the translational level, on expressed genes that are involved in organ abscission-related cell separation (Brown 1997). Bud and flower drop in orchids during transportation and dark storage is a serious problem, consequently, many farmers in South-East Asia have stopped growing Aranthera 'Beatnice Eng' and Dendrobium 'Sri Siam' because of this bud drop problem (Hew and Clifford 1993).…”

Section: Ethylene Insensitivity Delays Flower Senescence and Inhibitsmentioning

confidence: 99%

“…Numerous studies have reported ethylene-induced floral bud drop and floral senescence in different orchids grown for cut flowers or as potted plants (Hew and Clifford 1993;Rattanawisalanon and others 2003;Huang and Paull 2009;Sun and others 2009;Raffeiner and others 2009b).…”

Section: Introductionmentioning

confidence: 96%

Improved Postharvest Quality of Inflorescences of fbp1::etr1-1 Transgenic Burrageara ‘Stefan Isler Lava Flow’

Winkelmann

Warwas

Raffeiner³

et al. 2015

J Plant Growth Regul

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Flowers of the complex orchid hybrid Burrageara 'Stefan Isler Lava Flow' had been shown previously to react sensitively to ethylene. Via Agrobacterium tumefaciens, the mutant ethylene receptor ETHYLENE RESPONSE 1 (etr1-1) from Arabidopsis thaliana under the control of the flower-specific promoter FLOWER BINDING PROTEIN 1 (fbp1) from Petunia hybrida was transferred to Burrageara. One single-copy event was analyzed in this study aiming to investigate the expression of the fbp1::etr1-1 transgene in different plant and flower organs by quantitative RT-PCR and the reaction of flowers and inflorescences to ethylene. It was shown that the heterologous promoter led to high expression levels in the perianth of the orchid flowers compared to low levels in leaves and roots. The expression shift to the first whorl (sepals) described here corresponds to extended expression of endogenous B class MADS box homeotic genes in orchids in general. The transgenic plants grew and developed similar to the wild-type plants, except for slightly faster rooting in vitro and smaller flowers. Flower longevity was improved by 7 days in 10 ppm ethylene. Moreover, bud drop starting at day 5 of incubation of inflorescences in 10 ppm ethylene in the wild-type was efficiently prevented for at least 19 days in the fbp1::etr1-1 transgenic plants. The function of the tissue-specific promoter fbp1 and the mutant receptor etr1-1 was shown for the first time in a monocotyledonous plant.

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“…Little is known about assimilate partitioning in orchids despite the value of such information for improved flower production in those hybrids grown for the international cut-flower market (Hew & Clifford, 1993), Our recent studies have shown that *To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Regulation of assimilate partitioning in flowering plants of the monopodial orchid Aranda Noorah Alsagoff

1995

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SII M M A R YRadiocarbon dosing of leaves and source-sink manipulation treatments were used to clarify how assimilate partitioning is regulated in flowering plants of a monopodial Aranda orchid. The inflorescence was the dominant sink for all test leaves that were selected to determine patterns of "C-assimilate partitioning. Defoliation treatments had only minor effects on the distribution of '^C-assimilate between the inflorescence and vegetative apical shoot. Excision of the inflorescence resulted in greater proportions of '''C-assimilate being sent to all other sinks. Loss of the vegetative apical shoot had a quite different effect in that greater proportions of ^*C-assimilate were exported only to the inflorescence. Rates of '''C assimilation of remaining leaves were often raised in defoliated plants although this effect was not consistent for a single, residual leaf unless the vegetative apical shoot was also excised. Our results highlight the complexity of source-sink relationships in indeterminate plant types showing simultaneous vegetative and reproductive growth. We suggest that inflorescence growth in monopodial orchids such as Aranda is primarily source-limited although significant sink limitations for assimilate gain by the inflorescence exist because of a modulating effect of the vegetative apical shoot on inflorescence sink strength and the ability of source leaves to respond positively to increased sink demand.

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Plant growth regulators and the orchid cut-flower industry

Cited by 34 publications

References 38 publications

Effects of ethylene and 1-MCP (1-methylcyclopropene) on bud and flower drop in mini Phalaenopsis cultivars

Effects of ethylene and 1-MCP (1-methylcyclopropene) on bud and flower drop in mini Phalaenopsis cultivars

Improved Postharvest Quality of Inflorescences of fbp1::etr1-1 Transgenic Burrageara ‘Stefan Isler Lava Flow’

Regulation of assimilate partitioning in flowering plants of the monopodial orchid Aranda Noorah Alsagoff

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