The effect of paclobutrazol, daminozide, glyphosate and 2,4-D in gel on the emergence and growth of germinated tomato seeds

Pombo, Germán I.; Orzolek, Michael D.; Tukey, L. D.; Pyzik, T.

doi:10.1080/14620316.1985.11515639

Cited by 11 publications

(9 citation statements)

References 7 publications

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“…Reduction and delay of seedling emergence can be undesirable side effects from treating seeds with paclobutrazol (Aufhammer et al, 1993;Pasian and Bennett, 2001). These effects may be explained by paclobutrazol penetration in seeds and subsequent lowering of seedling GA contents (Pill and Gunter, 2001;Pombo et al, 1985). Since GA is involved in the elongation of seedling axis organs (Bewley and Black, 1994), we suggest that lower GA levels may have caused slower radicle and shoot elongation and delayed seedling emergence in verbena Table 3.…”

Section: Discussionmentioning

confidence: 87%

“…Soaking maize kernels in 80 or 160 mg•L -1 paclobutrazol for 16 h resulted in a temporary growth reduction of seedlings without decreasing seedling emergence (Dale and Drennan, 1997). Pombo et al (1985) found a reduction in seedling growth when tomato seeds were germinated on a silicate gel containing 5 mg•L -1 paclobutrazol. Soaking seeds in 1000 mg•L -1 paclobutrazol solutions for 6, 16, or 24 h resulted in respective growth reductions of 31%, 31%, or 40% in tomato, 61%, 37%, or 76%, in geranium, and 30%, 38%, or 41%, in marigold (Pasian and Bennett, 2001).…”

Section: Methodsmentioning

confidence: 90%

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Controlling Plug Height of Verbena, Celosia, and Pansy by Treating Seeds with Paclobutrazol

Magnitskiy¹,

Pasian²,

Bennett³

et al. 2006

HortSci

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Shoot stretching in plug production reduces quality and makes mechanized transplanting difficult. The objectives of this study were to measure seedling emergence and shoot height of plugs as affected by paclobutrazol application during seed soaking, priming, or coating on seedling emergence and height. Verbena (Verbena ×hybrida Voss. `Quartz White'), pansy (Viola wittrockiana L. `Bingo Yellow Blotch'), and celosia (Celosia cristata L. `New Look') seeds were soaked in water solutions of paclobutrazol and subsequently dried on filter paper at 20 °C for 24 h. Soaking seeds in paclobutrazol solutions before sowing reduced growth and percentage seedling emergence of verbena and pansy but had little effect on those of celosia. Verbena seeds soaked in 50, 200, or 500 mg paclobutrazol/L for 5, 45, or 180 min produced fewer and shorter seedlings than controls. Osmopriming verbena seeds with 10 to 500 mg paclobutrazol/L reduced seedling emergence. Seedling height and emergence percentage of pansy decreased with increasing paclobutrazol concentrations from 2 to 30 mg·L–1 and with soaking time from 1 to 5 min. The elongation of celosia seedlings was reduced by soaking seeds in 10, 50, 200, or 500 mg paclobutrazol/L solutions for 5, 180, or 360 min. However, these reductions were negligible and without any practical application.

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Section: Discussionmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 90%

Controlling Plug Height of Verbena, Celosia, and Pansy by Treating Seeds with Paclobutrazol

Magnitskiy¹,

Pasian²,

Bennett³

et al. 2006

HortSci

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“…A redução do porte da planta pelo uso desse regulador também foi verificada por Souza & Casali (1992) e Resende et al (1994). Outros autores trabalhando com diferentes espécies de plantas observaram redução no porte delas devido ao emprego desse regulador de crescimento (Pombo et al, 1985;Ramina et al, 1985). Com o uso de outras substânci-as consideradas antigiberelínicas, que atuam de forma semelhante, Foda et al (1979) e Souza & Casali (1991) verificaram redução na altura de plantas de alho com o uso de chlormequat, e Tewari et al (1984) aplicando daminozide.…”

Section: Resultsunclassified

“…Resende et al (1994) relataram que a aplicação de paclobutrazol reduziu a altura de planta aos 40 dias após o plantio, não sendo eficiente aos 80 dias e não mostrando diferenças significativas tanto no núme-ro de folhas como no número de bulbilhos por bulbo. Em outras hortaliças, como o tomate, brócolo e morango, a aplicação de paclobutrazol reduziu o crescimento das plantas (Pombo et al, 1985;Ramina et al, 1985).…”

Section: Introductionunclassified

Efeito de doses de paclobutrazol na cultura do alho

Resende

Souza

2002

Pesq. agropec. bras.

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O trabalho foi realizado no período de maio a outubro de 1991 no campo experimental do setor de olericultura da Ufla, Lavras, MG, com o objetivo de avaliar a influência de doses de paclobutrazol sobre o controle do pseudoperfilhamento e nas características morfológicas e comerciais do alho (Allium sativum L.). Utilizou-se o delineamento experimental de blocos ao acaso, com quatro doses de paclobutrazol (0, 500, 1.000 e 1.500 mg de i.a. L-1), em cinco repetições. Com o aumento das concentrações de paclobutrazol, houve uma redução na altura das plantas e no número de folhas por planta aos 60 e 90 dias após o plantio. A produtividade total e comercial de bulbos apresentou efeito significativo em relação às doses de paclobutrazol, sendo as concentrações de 725 e 778 mg L-1 as que proporcionaram as maiores produtividades. A porcentagem de bulbos pseudoperfilhados evidenciou efeito quadrático com o incremento das doses de paclobutrazol, cuja concentração de 1.163 mg L-1 propiciou maior redução na porcentagem de pseudoperfilhamento. A concentração de 744 mg L-1 de paclobutrazol proporcionou o maior peso médio de bulbo; e em relação a número de bulbilhos por bulbo, não se verificaram diferenças significativas entre os tratamentos.

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“…Prior to being removed from the market, daminozide was used to produce stocky tomato transplants. Both paclobutrazol (Pombo et al 1985) and uniconazole (Hickman et al 1989) have since been shown to facilitate tomato transplant production. Growth retardants have a number of potential uses in vegetable crops, however, at the present time their use is limited .…”

Section: Uses Of Plant Growth Retardantsmentioning

confidence: 99%

Plant Growth Substances

Arteca¹

1996

169

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The effect of paclobutrazol, daminozide, glyphosate and 2,4-D in gel on the emergence and growth of germinated tomato seeds

Cited by 11 publications

References 7 publications

Controlling Plug Height of Verbena, Celosia, and Pansy by Treating Seeds with Paclobutrazol

Controlling Plug Height of Verbena, Celosia, and Pansy by Treating Seeds with Paclobutrazol

Efeito de doses de paclobutrazol na cultura do alho

Plant Growth Substances

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