Reduction of Flower Abscission and Leaf Senescence in Cut Phlox Inflorescences by Thidiazuron

Sankhlá, N.; Mackay, Wayne A.; Davis, Tim D.

doi:10.17660/actahortic.2003.628.106

Cited by 18 publications

(15 citation statements)

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“…Application of TDZ in vase water for 24 h completely inhibited chlorophyll loss as reported in previous works [14] of cut flowers or potted plants [12,13,15,16]. The treatment with TDZ prevented the chlorophyll degradation or even in- creased the leaf total chlorophyll content as observed in treated cut tulips or cut chrysanthemum [11,3].…”

Section: Discussionsupporting

confidence: 73%

Interaction of 1-Methylcyclopropene and Thidiazuron on Cut Stock Flowers Vase Life

Ferrante¹

2012

TOHORTJ

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Abstract:Leaf yellowing or petal senescence is the main postharvest disorder for many cut flowers. Plant hormones such as cytokinins are able to inhibit leaf yellowing in some cut flowers and potted plants. In our experiments, we applied thidiazuron aiming to delay leaf yellowing and 1-methylciclopropene (1-MCP) for inhibiting flower senescence of cut stock flowers during vase life. Cut flowers were pulse treated with water (control), 5 M TDZ, 500 nLethylene or 10 L L -1 ethylene. All treatments were applied for 24 h (pulse), except for the 1-MCP that was applied for 6 h. The effect of treatments was evaluated by chlorophyll determination, petal fall, leaf yellowing appearance, vase life and ethylene production.Pulse treatment with TDZ was able to delay leaf yellowing in light during whole experimental period (30 days). During the first days after TDZ treatment, the chlorophyll b biosynthesis was strongly induced, after 5 days were the initial values, 3-fold higher while the total chlorophyll did not change. The TDZ stimulated ethylene production such as 1-MCP as soon as after 24 h. The ethylene production was found in cut flowers treated with ethylene, reaching 9 nl g -1 h -1 in leaves and 6.5 nl g -1 h -1 in detached flowers. The 1-MCP dramatically reduced the efficiency of TDZ even if the vase life of cut flowers was extended compared with controls.

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Section: Discussionsupporting

confidence: 73%

Interaction of 1-Methylcyclopropene and Thidiazuron on Cut Stock Flowers Vase Life

Ferrante¹

2012

TOHORTJ

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“…The effectiveness of TDZ may result from a combination of the above mechanisms of its action. Previously, we observed that TDZ prevented flower abscission in phlox and, like the purine cytokinins, delayed the senescence of leaves (Sankhla et al, 2003). Current results indicate that TDZ is also able to delay senescence of petals in L. densiflorus flowers.…”

Section: Discussionsupporting

confidence: 60%

“…Recently, thidiazuron (N'-phenyl-N'-1,2,3-thiadiazol-5-ylurea, TDZ), a phenylurea derivative, has been characterized as a highly efficacious type of non-purine cytokinin with strong morphogenic potency in a wide range of plant species (Murthy et al, 1998;Mok et al, 2000). Like purine cytokinins, TDZ has also been shown to be a potent inhibitor of leaf senescence and flower abscission (Ferrante et al, 2002;Sankhla et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Thidiazuron on Senescence of Flowers in Cut Inflorescences of Lupinus Densiflorus Benth

Sankhlá¹,

Mackay²,

Davis³

2005

Acta Hortic.

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Cut inflorescences of Lupinus species have potential as specialty cut flowers, but their sensitivity to ethylene varies widely among species and even in selections within a species. In some species (e.g., L. havardii) flower abscission, is particularly sensitive to the presence of ethylene. In contrast, we observed that in cut inflorescences of L. densiflorus, even in the presence of a relatively high concentration of 2-chloroethylphosphonic acid (CEPA), flowers did not exhibit any abscission, although flower senescence was hastened considerably. This investigation was initiated to study the effect of thidiazuron (TDZ), alone or in combination with sucrose, silver thiosulfate (STS) and 1-methylcyclopropene (1-MCP), on flower senescence of 'dark yellow' and 'light yellow' flowered lines of L. densiflorus. Incorporation of TDZ in the holding solution delayed the onset of flower senescence in both lines of L. densiflorus. The senescence of flowers was also delayed by the addition of sucrose or by pretreatment with STS or 1-MCP. Sucrose and TDZ, in combination, proved even more effective in delaying senescence of flowers. Both sucrose and TDZ, like STS and 1-MCP, also partially counteracted the flower senescence-accelerating effect of CEPA. These results suggest that, in addition to its cytokinin-like activity, TDZ may also have some role in modulating the effects of ethylene in cut inflorescences of L. densiflorus.

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“…Se ha demostrado que las auxinas inducen la síntesis de novo de ácido 1-aminocyclopropane-1-carboxílico sintasa (ACC) (Wei et al 2000, Taiz & Zeiger 2012, cuya inducción de la actividad de la ACC sintasa estimula la biosíntesis de etileno, el cual desempeña un papel crucial en el envejecimiento y muerte celular (Wei et al 2000, Sankhla et al 2003. Por lo tanto, podría asociarse con una acumulación de etileno en la zona superior del frasco, producto de la acumulación de auxinas, aunque en este estudio se utilizaron tapas con ventilación.…”

Section: Resultados Y Discusiónunclassified

Efecto del genotipo y fuente de citoquinina en la etapa de iniciación de cultivo in vitro de tejido adulto de Castanea sativa Mill.

Larson¹,

Hasbún²,

Jofré³

et al. 2017

Gayana Bot.

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Reduction of Flower Abscission and Leaf Senescence in Cut Phlox Inflorescences by Thidiazuron

Cited by 18 publications

References 0 publications

Interaction of 1-Methylcyclopropene and Thidiazuron on Cut Stock Flowers Vase Life

Interaction of 1-Methylcyclopropene and Thidiazuron on Cut Stock Flowers Vase Life

Effect of Thidiazuron on Senescence of Flowers in Cut Inflorescences of Lupinus Densiflorus Benth

Efecto del genotipo y fuente de citoquinina en la etapa de iniciación de cultivo in vitro de tejido adulto de Castanea sativa Mill.

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