Ethylene, Simulated Shipping, STS, and AOA Affect Corolla Abscission of New Guinea Impatiens

Dostal, Diana L.; Agnew, Nancy Howard; Gladon, Richard J.; Weigle, J. L.

doi:10.21273/hortsci.26.1.47

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…Plants showed 50%, 98%, and 100% flower abscission after overnight exposure to 0.25, 0.75, and 1 mL · L -1 , ethylene respectively. This is similar to Dostal et al (1991) who found that a 6-h treatment with 1 mL · L -1 ethylene caused 100% flower abscission in Impatiens ·hawkeri. Therefore, our further experiments were conducted using 1 mL · L -1 exogenous ethylene overnight in darkness.…”

Section: Resultssupporting

confidence: 90%

“…Impatiens plants are highly sensitive to ethylene and show rapid flower abscission (overnight) when exposed to very low concentrations of ethylene (Dostal et al, 1991). Both Impatiens ·hawkeri (Dostal et al, 1991;Han, 2003) and I. walleriana can benefit from 1-MCP protection to improve postharvest quality (Han, 2003;Skog, 2001). Impatiens, therefore, can serve as an excellent model plant to investigate the use and efficacy of this novel 1-MCP formulation on floral crops.…”

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confidence: 99%

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Evaluation of a Sprayable Formulation of 1-Methylcyclopropene in Floriculture

Filios¹,

Miller²

2016

horts

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We conducted a series of studies to determine the efficacy of a sprayable formulation of 1-methylcyclopropene (1-MCP; AFxRD-038) to inhibit ethylene-mediated flower abscission in Impatiens walleriana. Exposing Impatiens plants to 1.0 μL·L−1 ethylene for 18 hours caused complete abscission of open flowers and most buds. Sprays of the novel 1-MCP formulation at concentrations >2.5 mg·L−1 protected plants from ethylene. At 5 and 10 mg·L−1, the efficacy of 1-MCP increased as spray volume increased from 102 mL·m−2 to 306 mL·m−2. 1-MCP was rainfast with no decrease in efficacy resulting from heavy overhead irrigation within 1–2 minutes of application. Prepared 1-MCP solutions (10 mg·L−1) remained effective up to 2 weeks after mixing if held in airtight containers. The sprayable 1-MCP formulation provided protection against exogenous ethylene for a maximum of 4 days and reduced stress-related abscission from 3 days of darkness (in the absence of exogenous ethylene) at 20 °C or 40 hours darkness at 28 °C.

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Section: Resultssupporting

confidence: 90%

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confidence: 99%

Evaluation of a Sprayable Formulation of 1-Methylcyclopropene in Floriculture

Filios¹,

Miller²

2016

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“…AOA inhibits endogenous ethylene biosynthesis in plants by inhibiting the action of ACC synthase (Yu et al, 1979). In tests with this compound on flowering potted Impatiens, Dostal et al (1991) showed that AOA inhibited corolla abscission by 20%. BA, a growth regulator, may retard leaf and floral organ senescence (Halevy and Kofranek, 1976).…”

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confidence: 99%

AOA and BA Influence on Floral Development and Longevity of Potted `Victory Parade' Miniature Rose

Serek¹,

Andersen²

1993

HortSci

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Miniature rose (Rosa hybrida L. cv. Victory Parade) plants were treated with AOA, BA, or STS before simulated shipment and display in an interior environment. Although AOA-treated plants lasted slightly longer than nontreated plants, their postproduction quality, evaluated as floral longevity, bud drying, and bud abscission, was not as satisfactory as that of STS- or BA-treated plants. In this ethylene-sensitive cultivar, BA treatment was almost as satisfactory as STS treatment. Flowers that opened in the greenhouse before shipping lasted longer than those that opened in the interior environment room. STS and BA treatments increased the longevity of both flower types. However, these treatments did not eliminate the difference between flowers that opened before or after transport simulation. Chemical names used: aminooxyacetic acid (AOA); benzyladenine (BA); silver thiosulfate (STS).

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“…tested. Ethylene and jasmonic acid are known signal molecules for disease defense and abscission in plants (Dostal et al, 1991;Estornell et al, 2013;González-Carranza et al, 1998;Sequeira, 1973;Sexton, 1976;Wilson et al, 1987), and it may be beneficial to further study the role that plant hormones may play in the resistance response between Impatiens spp. and S. sclerotiorum.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Annual Bedding Plants for Resistance to White Mold

Grabowski

Malvick

2015

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White mold, caused by the necrotrophic fungus Sclerotinia sclerotiorum (Lib.) de Bary, causes stem rot, crown rot, wilt, and death of many common herbaceous ornamental plants. Relatively little research has been done on management of white mold and resistance to this disease in ornamental crops. Plant varieties from four genera of widely available annual bedding plants with no reported history of white mold susceptibility were evaluated for potential resistance to S. sclerotiorum. All plants were inoculated with three isolates of S. sclerotiorum and evaluated for disease severity in a controlled environment and under field conditions. Portulaca grandiflora Hook. ‘Sundial Scarlet’, P. grandiflora ‘Sundial White’, Pentas lanceolata Forssk. ‘Graffiti Pink’, and Scaevola aemula R. Br. ‘Whirlwind White’ were highly susceptible to white mold in the controlled environment but had significantly lower disease incidence and severity than Zinnia elegans ×angustifolia ‘Profusion White’, the susceptible control, under field conditions. Impatiens hawkeri W. Bull. ‘Sonic Red’, I. hawkeri ‘Sonic Amethyst’, I. hawkeri ‘Sonic White’, I. walleriana Hook. f. ‘Blitz 3000 Red’, I. walleriana ‘Blitz 3000 White’, and I. walleriana ‘Blitz 3000 Rose’ displayed abscission of diseased plant tissue as an unusual resistance response. Plants from all four genera that were evaluated became infected with S. sclerotiorum to a lesser extent than susceptible controls under field conditions and could be used as part of an integrated disease management program for white mold in ornamental plantings.

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Ethylene, Simulated Shipping, STS, and AOA Affect Corolla Abscission of New Guinea Impatiens

Cited by 16 publications

References 10 publications

Evaluation of a Sprayable Formulation of 1-Methylcyclopropene in Floriculture

Evaluation of a Sprayable Formulation of 1-Methylcyclopropene in Floriculture

AOA and BA Influence on Floral Development and Longevity of Potted `Victory Parade' Miniature Rose

Evaluation of Annual Bedding Plants for Resistance to White Mold

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