Effect of gibberellic acid on senescence of isolated petals of carnation

Garrod, J. F.; Harris, G. P.

doi:10.1111/j.1744-7348.1978.tb00711.x

Cited by 10 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They also show for the first time, that while flower longevity is extended by GA,, the climacteric rise in ethylene, characteristic of carnation flower senescence 1171, is delayed and considerably reduced. These findings are consistent with the reported senescence-retarding potential of GA, in fruit ripening [6,3], vegetative tissues [2,7] and detached carnation petals [8]. The conclusions of this study support the previously untested suggestion, that the inconsistent effect of GA, on flower senescence, is the result of GA, responsiveness being a function of the stage of flower development at the time of harvest [l 11.…”

Section: Discussionsupporting

confidence: 92%

“…Application of GA, to intact carnation flowers at concentrations between 0.1-200 mgll' had little or no effect on longevity when applied to fully open flowers [17]. It did however, prolong the longevity of isolated carnation petals [8,221 and intact stock flowers [l]. When applied at the bud stage, the longevity of the developed flowers was prolonged at 1Omgll' and shortened at 100 mg ll ' , a concentration presumed to be supra-optimal [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of gibberellic acid on carnation flower senescence: evidence that the delay of carnation flower senescence by gibberellic acid depends on the stage of flower development

1992

View full text Add to dashboard Cite

Gibberellic acid at concentrations of 10m5 M and 10e4 M delayed the senescence of cut carnation flowers, when applied continuously via the stem, to flowers between the closed brush and fully open stages of development. Older flowers with reflexed petals were unresponsive. Treatment with paclobutrazol, an inhibitor of GA biosynthesis, prevented tight buds from opening fully, reduced the longevity of partially open flowers, but was ineffective when applied continuously to fully open flowers. Gibberellic acid-treated flowers did not show simultaneous petal inrolling, a known indicator of senescence, and the time to complete petal drying was extended. Gibberellic acid modified the climacteric ethylene rise in a manner consistent with the extension of longevity. These results provide evidence for a correlative role of gibberellins in flower development.Abbreviations: GA, = gibberellin A,; GLC = gas liquid chromatography

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of gibberellic acid on carnation flower senescence: evidence that the delay of carnation flower senescence by gibberellic acid depends on the stage of flower development

1992

View full text Add to dashboard Cite

show abstract

“…Studies with nasturtium (Tropaeolum majus L.) suggest a relationship between GA concentration in leaves and the timing of the onset of senescence (Beevers 1966) with concentrations of GA declining as senescence begins. Application of GAs to isolated petals of carnation has been reported to delay their senescence (Garrod and Harris 1978), while the delay in appearance of leaf chlorosis caused by GA 4+7 , in the current study, seems to be linked to increased concentrations of GA 4+7 in leaves. Application of GA 4+7 retarded chlorophyll degradation, even at the lowest doses as evident with maintenance of leaf nitrogen concentrations in Alstroemeria leaves (Table 2).…”

Section: Discussionsupporting

confidence: 43%

Seed enhancement with cytokinins: changes in growth and grain yield in salt stressed wheat plants

Mutui

Emongor²,

Hutchinson

2006

Plant Growth Regul

View full text Add to dashboard Cite

Leaf yellowing is a major problem in Alstroemeria and absence of leaf senescence symptoms is an important quality attribute. Two Alstroemeria cultivars 'Yellow King' and 'Marina' were sourced from a commercial farm and harvested when sepals began to reflex. Stems were re-cut under water and kept in vase solutions of gibberellin A 4+7 (0, 2.5, 5.0, 7.5, 10.0, 12.5 or 15.0 mg l À1 [Provide R ]). Treatments and cultivars were combined in a factorial fashion and arranged in a completely randomised design. Application of GA 4+7 in the holding solution at 2.5-10.0 mg l À1 significantly delayed the onset of leaf senescence by around 7 days and significantly increased days to 50% petal fall by ca. 2 days. Additionally, these GA 4+7 concentrations resulted in higher retention of leaf nitrogen, leaf chlorophyll and also increased leaf water content, while reducing leaf dry weight, all relative to untreated controls. Cultivar 'Yellow King' had significantly longer vase life and a better retention of leaf quality than 'Marina'. Our results suggest that a concentration of 10 mg l À1 GA 4+7 can be used to prolong vase life, delay leaf senescence and enhance post-harvest quality of Alstroemeria cut flowers during their transport to market.

show abstract

“…This suggests absence of a role of gibberellins in Iris tepal senescence. Gibberellins delayed the time to senescence in the dicotyledonous (and ethylene sensitive) carnation flowers (Eisinger , Garrod and Harris ) but had no effect in the monocotyledonous (and ethylene insensitive) Hemerocallis flowers (Rubinstein 2000).…”

Section: Discussionmentioning

confidence: 99%

“…The effect of cytokinins in Iris tepals seems in contrast with the lack of effect of BA in Hemerocallis , another monocotyledonous flower in which tepal senescence seems not regulated by ethylene (Lukaszewski and Reid ). Cytokinins such as BA also considerably increased the longevity of carnation flowers, a system in which senescence is regulated by ethylene (Eisinger , Garrod and Harris , van Staden et al ).…”

Section: Discussionmentioning

confidence: 99%

Delay of Iris flower senescence by cytokinins and jasmonates

Doorn

Çelikel

Pak

et al. 2012

Physiologia Plantarum

View full text Add to dashboard Cite

It is not known whether tepal senescence in Iris flowers is regulated by hormones. We applied hormones and hormone inhibitors to cut flowers and isolated tepals of Iris × hollandica cv. Blue Magic. Treatments with ethylene or ethylene antagonists indicated lack of ethylene involvement. Auxins or auxin inhibitors also did not change the time to senescence. Abscisic acid (ABA) hastened senescence, but an inhibitor of ABA synthesis (norflurazon) had no effect. Gibberellic acid (GA3 ) slightly delayed senescence in some experiments, but in other experiments it was without effect, and gibberellin inhibitors [ancymidol or 4-hydroxy-5-isopropyl-2-methylphenyltrimethyl ammonium chloride-1-piperidine carboxylate (AMO-1618)] were ineffective as well. Salicylic acid (SA) also had no effect. Ethylene, auxins, GA3 and SA affected flower opening, therefore did reach the flower cells. Jasmonates delayed senescence by about 2.0 days. Similarly, cytokinins delayed senescence by about 1.5-2.0 days. Antagonists of the phosphatidylinositol signal transduction pathway (lithium), calcium channels (niguldipine and verapamil), calmodulin action [fluphenazine, trifluoroperazine, phenoxybenzamide and N-(6-aminohexyl)-5-chloro-1-naphtalenesulfonamide hydrochloride (W-7)] or protein kinase activity [1-(5-isoquinolinesulfonyl)-2-methylpiperazine hydrochloride (H-7), N-[2-(methylamino)ethyl]-5-isoquinolinesulfonamide hydrochloride (H-8) and N-(2-aminoethyl)-5-isoquinolinesulfonamide dihydrochloride (H-9)] had no effect on senescence, indicating no role of a few common signal transduction pathways relating to hormone effects on senescence. The results indicate that tepal senescence in Iris cv. Blue Magic is not regulated by endogenous ethylene, auxin, gibberellins or SA. A role of ABA can at present not be excluded. The data suggest the hypothesis that cytokinins and jasmonates are among the natural regulators.

show abstract

Effect of gibberellic acid on senescence of isolated petals of carnation

Cited by 10 publications

References 9 publications

Effect of gibberellic acid on carnation flower senescence: evidence that the delay of carnation flower senescence by gibberellic acid depends on the stage of flower development

Effect of gibberellic acid on carnation flower senescence: evidence that the delay of carnation flower senescence by gibberellic acid depends on the stage of flower development

Seed enhancement with cytokinins: changes in growth and grain yield in salt stressed wheat plants

Delay of Iris flower senescence by cytokinins and jasmonates

Contact Info

Product

Resources

About