Effects of Diazocyclopentadiene (DACP) and Silver Thiosulphate (STS) on Ethylene Regulated Abscission of Sweet Pea Flowers (Lathyrus odoratus L.)

Sexton, R.; Porter, A. E. A.; Littlejohns, Susan; Thain, Simon C.

doi:10.1006/anbo.1995.1031

Cited by 22 publications

(19 citation statements)

References 17 publications

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“…In sweet pea and raspberry flowers, the increase in ethylene production upon harvesting is so fast that adding exogenous ethylene has little effect, as endogenously generated ethylene is already saturating (Burdon and Sexton 1993; Sexton et al 1995). To investigate if this was true in tulip, attempts were made to measure ethylene production from cut flowers using the standard methods of gas chromatography.…”

Section: Resultsmentioning

confidence: 99%

“…Exogenous ethylene may have little effect on abscission because there is a very rapid increase in endogenous ethylene production. In sweet peas for instance, ethylene production rises to 25 nl g −1 fresh weight h −1 24 h after harvest, which is enough to saturate the process (Sexton et al 1995). This does not explain the lack of response in tulips, as both cultivars have very low ethylene production rates of between 0.05 and 0.3 nl g −1 fresh weight h −1 during floral senescence.…”

Section: Discussionmentioning

confidence: 99%

“…The latter were sealed and the ethylene accumulated over periods of 2–8 h in the light at 25°C. Ethylene production rates were determined using a Unicam 601 gas chromatograph (Cambridge, UK) as described previously (Sexton et al 1995).…”

Section: Methodsmentioning

confidence: 99%

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Lack of ethylene involvement in tulip tepal abscission

Sexton¹,

Laird²,

Doorn³

2000

Physiologia Plantarum

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The tepals of cut flowers of Tulipa hybrida cv. Golden Apeldoorn and Tulipa kaufmanniana cv. Shakespeare abscise 3–4 days after harvest. The weakening of the abscission zones is accompanied by cell wall breakdown and the separation of 3–4 rows of intact cells at the base of the tepal. During senescence, there is no ethylene climacteric and ethylene production rates remain low, between 0.07 and 0.4 nl g−1 fresh weight h−1. Adding 3–5 μl l−1 ethylene slightly accelerated the weakening of the abscission zones but had no effect on the time of first abscission. Neither 0.5 mM silver thiosulphate nor 5 mM aminoethoxyvinylglycine delayed the time to abscission. It is concluded that tulip tepal fall does not involve primary regulation by ethylene, unlike the majority of other abscission systems that have been studied.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Lack of ethylene involvement in tulip tepal abscission

Sexton¹,

Laird²,

Doorn³

2000

Physiologia Plantarum

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“…In order to answer this question we studied the pattern of senescence, and its dependence on pollination. Flowers from other legumes have been reported to be ethylene-sensitive (Sexton et al 1995;Woltering and van Doorn 1988) and therefore the control of ethylene biosynthesis and sensitivity in thesē owers is central for the co-ordination of the entire process. In order to obtain additional data about the control of ethylene sensitivity in pea¯owers, we cloned a putative ethylene-response sensor gene (psERS), which has been suggested to be one of the elements of the ethylene-perception pathway (Chang 1996).…”

Section: Introductionmentioning

confidence: 98%

Programme of senescence in petals and carpels of Pisum sativum L. flowers and its control by ethylene

Orzáez

Blay

Granell

1999

Planta

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The role of ethylene in the control of senescence of both petals and unpollinated carpels of pea was investigated. An increase in ethylene production accompanied senescence, and the inhibitors of ethylene action were effective in delaying senescence symptoms in different flower verticils. Pollination did not seem to trigger the senescence syndrome in the corolla as deduced from the observation that petals from pollinated and unpollinated flowers and from flowers whose carpels had been removed senesced at the same time. A cDNA clone encoding a putative ethylene-response sensor (psERS) was isolated from pea flowers, and the pattern of expression of its mRNA was studied during development and senescence of different flower tissues. The levels of psERS mRNA paralleled ethylene production (and also levels of 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) mRNA) in both petals and styles. Silver thiosulfate treatments were efficient at preventing ACO and psERS mRNA induction in petals. However, the same inhibitor showed no ability to modify expression patterns in pea carpels around the anthesis stage, suggesting different controls for ethylene synthesis and sensitivity in different flower organs.

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“…The flowers of sweet pea are highly sensitive to ethylene, and the vase life of their cut flowers is very short (Ichimura and Hiraya, 1999;Kebenei et al, 2003;Mor et al, 1984;Sexton et al, 1995). Treatment with sucrose supplemented with 8-hydroxyquinoline sulfate (8-HQS), an antimicrobial compound, promotes flower opening, and extends vase life in cut sweet pea flowers (Ichimura and Hiraya, 1999;.…”

Section: Introductionmentioning

confidence: 99%

2-Cyanoethyl-isoxazolin-5-one Is a Major Low Molecular Weight Nitrogenous Compound in Sweet Pea (<i>Lathyrus odoratus</i> L.)

et al. 2016

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An unidentified compound was detected in sweet pea (Lathyrus odoratus L. ʻDianaʼ) petals by HPLC analysis using a cation-exchange column for soluble carbohydrate analysis. This compound was identified as 2-cyanoethyl-isoxazolin-5-one (2-CEIX) using 1 H-NMR, 13C-NMR, and CI-MS and ESIMS. 2-CEIX was detected in the petals, leaves and stem. Amino acid and other nitrogenous compound contents in these organs were compared with 2-CEIX. The content of asparagine was highest, followed by 2-CEIX in the petals, and 2-CEIX was highest among nitrogenous compounds in the stem and leaves. The 2-CEIX content in the petal decreased during flower opening, but those in the petals and the other floral parts increased during senescence regardless of sucrose treatment. These trends differed from those of monosaccharides, sucrose and cyclitols. Thus, the role of 2-CEIX appears to differ from those of soluble carbohydrates. 2-CEIX was not detected in phloem and xylem saps. The results suggest that 2-CEIX is a major nitrogenous compound of low molecular weight and is likely to be produced in situ in various organs in sweet pea.

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Effects of Diazocyclopentadiene (DACP) and Silver Thiosulphate (STS) on Ethylene Regulated Abscission of Sweet Pea Flowers (Lathyrus odoratus L.)

Cited by 22 publications

References 17 publications

Lack of ethylene involvement in tulip tepal abscission

Lack of ethylene involvement in tulip tepal abscission

Programme of senescence in petals and carpels of Pisum sativum L. flowers and its control by ethylene

2-Cyanoethyl-isoxazolin-5-one Is a Major Low Molecular Weight Nitrogenous Compound in Sweet Pea (<i>Lathyrus odoratus</i> L.)

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