Postharvest Height Suppression of Potted Tulips with Paclobutrazol

McDaniel, Gary L.

doi:10.21273/hortsci.25.2.212

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…Plant growth regulators (PGRs) are commonly used for ornamental plant production (Whipker, 2013). Among PGRs, triazoles are one of the most popular and effective chemicals for compact ornamental plant production (Arnold, 1998;Jiao et al, 1986;McDaniel, 1990). They have been reported more effective for controlling excessive growth when applied as drench or to stems than as foliar sprays (Davis et al, 1988).…”

mentioning

confidence: 99%

Paclobutrazol or Ancymidol Effects on Postharvest Performance of Potted Ornamental Plants and Plugs

Ahmad

Whipker²,

Dole³

2015

horts

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Effects of paclobutrazol and ancymidol on postharvest performance and growth control of potted sunflower (Helianthus annuus L.), zinnia (Zinnia elegans Jacq.) and marigold (Tagetes erecta L.), petunia (Petunia ×hybrida Vilm.) plugs, respectively, were studied. Paclobutrazol was applied as a drench at 0, 1.0, 2.0, or 4.0 mg of a.i. per 15.2-cm pot for sunflower and 0, 0.5, 1.0, or 2.0 mg per 12.5-cm pot for zinnia, while ancymidol was applied at 0, 40, 80, and 160 mg·L−1 with a volume of 0.21 L·m−2 as a foliar spray for marigolds or petunia plug crops. With an increase in paclobutrazol dose or ancymidol concentration, plant growth (plant height and diameter, shoot fresh or dry weight) was controlled for all species tested. Use of 1.0–2.0 mg paclobutrazol per pot produced 21% to 28% shorter plants with 12% to 15% smaller plant diameter, 13% to 19% less shoot fresh weight, 15% to 21% less dry weight, and darker green foliage color for potted sunflower than nontreated plants. Treatment with 1.0–4.0 mg paclobutrazol per pot delayed first wilting by 0.7–1.4 days compared with nontreated plants. For zinnia, 0.5–1.0 mg paclobutrazol controlled plant growth, produced dark green foliage, and extended shelf life by delaying first wilting by 2.6–3.9 days and second wilting by 1.4–2.0 days than nontreated plants. For marigold and petunia plugs, 40–80 mg·L−1 ancymidol provided ample growth control with darker green foliage; however, postharvest longevity was extended only when plugs were sprayed with 160 mg·L−1 ancymidol. During simulated storage and shipping, plant growth retardants maintained darker green foliage for potted sunflower, zinnia, and marigold plugs and prevented postharvest stem elongation of petunia plugs. In summary, use of plant growth retardants effectively controlled excessive plant growth and extended shelf life of potted plants and plugs.

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confidence: 99%

Paclobutrazol or Ancymidol Effects on Postharvest Performance of Potted Ornamental Plants and Plugs

Ahmad

Whipker²,

Dole³

2015

horts

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“…Gibberellin inhibitors such as ancymidol and paclobutrazol are reported to delay flowering in Tulipa (McDaniel, 1990), Lilium (Bailey and Miller, 1989), and Gladiolus (Ahmad et al, 2014). However, high concentrations of ancymidol resulted in completely inhibiting flowering in 'Bananarama' (Fig.…”

Section: Discussionmentioning

confidence: 99%

Effects of a Gibberellin Inhibitor on Flowering, Vegetative Propagation, and Production of Rapid Generation Cycling Gladiolus for Potted Plant Production

Aljaser¹,

Anderson²

2021

horts

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Gladiolus (Gladiolus ×hybridus) is an asexually propagated, herbaceous perennial and an economically important cut flower crop. In commercial production, gladioli have tall flower stalks, which limit their use to cut flowers and annual garden plants. The gladiolus breeding program at the University of Minnesota has bred and selected rapid generation cycling (RGC) cycle 1 gladiolus, which can flower in <1 year from seed instead of the norm of 3 to 5 years (which are vegetatively propagated as corms). Gibberellin inhibitors, such as ancymidol, are used as plant growth retardants to control height in potted plants. Higher concentrations can inhibit flowering along with other negative side effects. The aim of this study was to investigate the growth, flowering, and corm/cormel production response of cycle 1 gladiolus to the gibberellin inhibitor, ancymidol (0, 100, and 400 mg·L−1 soak) in comparison with noncycle 1 genotypes and commercial cultivars for potted gladiolus production. Cycle 1 genotypes flowered with all ancymidol concentrations while noncycle 1 genotypes had significantly fewer flowers or were completely nonflowering under higher concentrations. All tested genotypes had increased leaf width as ancymidol concentration increased. Conversely, flower stalk heights were shorter as the ancymidol concentration increased while the number of stalks was nonsignificant. Corms, cormel number, and fresh weights decreased in all genotypes except for one cycle 1 genotype, which had an increase in both corm number and fresh weight when treated with 100 mg·L−1 ancymidol. Cycle 1 gladiolus are more resilient to this gibberellin inhibitor even at high concentrations and can potentially be used for gladiolus potted plant production.

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“…This is supported by the ohservations that GA hiosynthesis is involved in tulip sprout growth at least during the first week at higher temperatures after planting (Shoub andDe Hertogh 1974, Rehers et al 1994a). Although a comparable inhibiting effect of paclobutrazol, when applied prior to the cold treatment, suggests GA biosynthesis to occur during the cold period as well (Saniewski 1989, McDaniel 1990, this effect might be explained by the fact that paclobutrazol remains active for several months (Suh et al, 1992), Basal plates (Aung et al 1971) or roots (Kawa-Miszczak et al 1992) of tulip bulhs, have been suggested as site of GA biosynthesis. However, the present results did not yield any direct or indirect indication that these organs are sites of GA production (Tab.…”

Section: Discussionmentioning

confidence: 99%

Gibberellin levels and cold-induced floral stalk elongation in tulip

Rebers¹,

Vermeer²,

Knegt³

et al. 1995

Physiol Plant

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and van der Plas. L. H. W. 1995. Gibberellin levels and cold-induced floral stalk elongation in tuhp. -Physiol. Plant. 94: 687-691.To investigate the role of gibberellins (GAs) in the cold requirement of tulip ITulipa gesneriana L. cv. Apeldoom), bulbs were dry-stored at 5°C or at I7°C for 12 weeks prior to planting at 20°C. Only precooied bulbs showed rapid sprout growth and developed a full-grown flower. Endogenous GA levels were measured in sprouts and basai plates at the time of planting and in the second week after planting, by combined gas chromatography-mass spectrometry using deuterated internal standards. GAi was the major gibberellin. while GA|, GA? and GAj^ were present in lower amounts. At the time of planting, sprouts from non-cooled bulbs contained significantly more GAj and GA, per sprout than those from precooied bulbs. Hence, there is no direct correlation between rapid sprout growth after planting and high GA levels at planting. In the second week after planting, floral stalks of precooied bulbs contained 2 to 3 times more GA4 and its metabolite GAj., per floral stalk and per g fresh weight than those of non-cooled bulbs. The results are discussed with regard to the role of gibberellins in the cold-induced floral stalk elongation of tuhp.

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Postharvest Height Suppression of Potted Tulips with Paclobutrazol

Cited by 11 publications

References 4 publications

Paclobutrazol or Ancymidol Effects on Postharvest Performance of Potted Ornamental Plants and Plugs

Paclobutrazol or Ancymidol Effects on Postharvest Performance of Potted Ornamental Plants and Plugs

Effects of a Gibberellin Inhibitor on Flowering, Vegetative Propagation, and Production of Rapid Generation Cycling Gladiolus for Potted Plant Production

Gibberellin levels and cold-induced floral stalk elongation in tulip

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