Osmoconditioning of Carrot Seeds to Improve Seedling Establishment and Yield in Cold Soil<sup>1</sup>

Szafirowska, A.; Khan, Anwar A.; Peck, N. H.

doi:10.2134/agronj1981.00021962007300050023x

Cited by 48 publications

(22 citation statements)

References 4 publications

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“…Similar results have been obtained for asparagus seeds by Krarup (1991) and Gray et al (1991). However, the beneficial effect of priming was more pronounced for seeds of low physiological quality, as also reported by Szafirowska et al (1981), Bray (1995) and Nascimento & Aragão (2004).…”

Section: Resultssupporting

confidence: 78%

Germination and vigour of primed asparagus seeds

Bittencourt¹,

Dias²,

Dias³

et al. 2005

Sci. agric. (Piracicaba, Braz.)

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The osmotic conditioning or priming is considered a promising technique to speed up germination and to improve seed performance. Four seed lots of asparagus, Mary Washington cultivar, were primed at 25°C for seven or 14 days using PEG 6000 at -1.0 or -1.2 MPa, or sea water at -3.3 MPa; or for three days in distilled water. The physiological quality of the seeds was evaluated by standard germination, first count germination, speed of seedling emergence, and germination percentage and seedling fresh and dry weights after controlled deterioration test. Primed seeds presented higher germination speed, independently of their initial physiological quality. Beneficial effects of priming on germination and vigour were more expressive in the seed lot of low physiological quality. Priming in PEG 6000 at -1.0 MPa for 14 days was the most beneficial treatment to improve asparagus seeds performance. Key words: Asparagus officinalis, osmotic conditioning, physiological quality GERMINAÇÃO E VIGOR DE SEMENTES DE ASPARGO OSMOTICAMENTE CONDICIONADASRESUMO: O condicionamento osmótico ou priming tem sido considerado uma técnica promissora para acelerar a germinação e melhorar o desempenho das sementes. Sementes de quatro lotes de aspargo, cv. Mary Washington, foram condicionadas em PEG 6000 a -1,0 e -1,2 MPa, por 7 e 14 dias, em água do mar a -3,3 MPa, por 7 e 14 dias e em água destilada por 3 dias, em BOD a 25°C. Sementes não condicionadas foram usadas como testemunha. A qualidade fisiológica das sementes foi avaliada pela germinação, primeira contagem de germinação, velocidade de emergência e pela porcentagem de geminação e pesos da matéria fresca e seca das plântulas obtidas no teste de deterioração controlada (45°C/24 horas). O experimento foi instalado no delineamento inteiramente casualizado com quatro repetições e oito tratamentos, sendo as médias comparadas pelo teste de Duncan a 5%. Sementes de aspargo condicionadas osmoticamente apresentaram maior velocidade de germinação, independentemente de sua qualidade fisiológica inicial. Efeitos benéficos do condicionamento osmótico, na germinação e no vigor, foram mais expressivos no lote de baixa qualidade fisiológica. O condicionamento em PEG a -1,0 MPa por 14 dias foi, em geral, o tratamento mais adequado para promover melhoria na qualidade fisiológica dessas sementes. Palavras-chave: Asparagus officinalis, condicionamento osmótico, qualidade fisiológica

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Section: Resultssupporting

confidence: 78%

Germination and vigour of primed asparagus seeds

Bittencourt¹,

Dias²,

Dias³

et al. 2005

Sci. agric. (Piracicaba, Braz.)

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“…NS ,*,**,Significant at P = 0.05 and 0.01 or nonsignificant, respectively. reported for osmoconditioning (Szafirowska et al, 1981). In that study, as in the present one, a preplant conditioning improved the performance of good-and poor-quality seeds, and the improvements were greater in the poor-quality than in the more vigorous seeds.…”

Section: Seeds Weresupporting

confidence: 77%

Matriconditioning of Vegetable Seeds to Improve Stand Establishment in Early Field Plantings

Khan¹,

Maguire²,

Abawi³

et al. 1992

jashs

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A matriconditioning procedure based on the matric properties of Micro-Cel E and expanded vermiculite #5 has proved effective in improving seedling emergence in growth chambers. The major objectives of this study were to examine some physical characteristics of the carriers and their effectiveness as preplant conditioning media in improving stand establishment of vegetable seeds in field plantings. Carrier characteristics included no detectable solute or osmotic potential, low electrical conductivity (0.48-0.04 mmho/cm), high water-retaining capacity (450% to 600%), a pH range of 7.0 to 8.4, and ability to effectively control seed hydration (conditioning) at low matric potential. The seed: carrier: water ratio for seed conditioning ranged from 1:0.3-0.5:1-2 (by weight). In a field trial, conditioning of `Long Imperator' and `Nantes' carrot (Daucus carota var. sativus Hoffm.) seeds reduced the time to 10% of final emergence (T10) by 2.6 to 2.8 days and to 50% of final emergence (T50) by 2.1 to 3.0 days. Conditioning increased the final emergence percentage by 39% in 1-year-old `Long Imperator' compared to 150% in 4-year-old `Nantes' seeds. In another field trial, the effect of conditioning on stand establishment was evaluated in `Jackpot' tomato (Lycopersicon esculentum Mill.), `California Wonder' pepper (Capsicum annuum L.), and `BBL 47' snap bean (Phaseolus vulgaris) seeds. In tomato, conditioning reduced the T10 by 0.9 day, had no effect on T50, and increased the emergence percentage by 86%. In pepper, conditioning reduced the T10 and T50 by 1.5 days and increased the percentage emergence by 30%. In snap bean seeds, conditioning in Micro-Ccl E reduced the T10 and T50 by 0.8 day but adversely affected the percentage emergence. Further reductions in T10 and T50 (1.2 and 1.6 days, respectively) and restoration of percentage emergence to control level occurred upon addition of 0.001 mM GA3 during conditioning. Fungicides added to carrot, tomato, and pepper seeds, with or without conditioning, showed no additional improvements and, in a few cases, adversely affected emergence. A preplant conditioning in Micro-Ccl E, alone or in combination with GA3, smears to be a viable alternative to conditioning! seeds in liquid carriers. Chemical name used: gibberellic acid (GA3)

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“…and asparagus seeds occurred at 10C in both saline and nonsaline media. Seed priming is particularly beneficial at low temperatures (Pill and Finch-Savage, 1988;Szafirowska et al, 1981). The FGP of tomato or asparagus seeds in nonsaline media at 20C was not increased by priming, but in saline media at 20C the FGP of both species was increased by priming seeds in INO or NaNO 3 (Table 2).…”

Section: Seedsmentioning

confidence: 98%

“…As a priming agent, NaNO 3 was superior to PEG for tomato seeds while synthetic seawater was as effective as PEG for asparagus seeds (Frett et al, 1991). Primed seeds have improved vigor, particularly under adverse seedbed conditions such as low temperature (Pill and Finch-Savage, 1988;Szafirowska et al, 1981), matric stress (Frett and Pill, 1989), or salinity (Wiebe and Muhyaddin, 1987).…”

mentioning

confidence: 99%

Germination and Seedling Emergence of Primed Tomato and Asparagus Seeds under Adverse Conditions

Pill¹,

Frett²,

Morneau³

1991

HortSci

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Seeds of `Ace 55' tomato (Lycopersicon esculentum Mill.) and `Mary Washington' asparagus (Asparagus officinalis L.) were primed in -0.8 MPa (20C, 1 week, dark) polyethylene glycol 8000 (PEG), synthetic seawater (INO), or NaNO3. Primed seeds of both species had a higher percentage of germination than untreated seeds only at 10C in nonsaline (– 0.05 MPa) medium, while in saline medium (– 0.6 MPa) priming increased the percentage of germination of tomato seeds at 10 and 30C, and of primed asparagus seeds at 10 and 20C. Sodium nitrate was superior to PEG or IN0 for priming tomato seeds since it resulted in fewer days to 50% germination and higher final germination percentage in saline media at all temperatures. IN0 was a satisfactory alternative to PEG or NaNO3 for priming asparagus seeds since priming agent had little or no effect on germination. Seedling emergence from NaNO3-primed seeds of both species sown in a seedbed provided saline (– 0.39 MPa) irrigation was faster than from untreated dry-sown seeds. In the saline seedbed, priming increased final emergence percentage (FEP) from asparagus seeds, provided they were not subsequently dried, but had no effect on the percentage emergence of tomato seeds. Fluid-drilling primed or germinated seeds of either species enhanced seedling establishment in the saline seedbed by reducing time to 50% emergence and/or increasing FEP relative to primed, dried-b&k or untreated seeds.

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Osmoconditioning of Carrot Seeds to Improve Seedling Establishment and Yield in Cold Soil¹

Cited by 48 publications

References 4 publications

Germination and vigour of primed asparagus seeds

Germination and vigour of primed asparagus seeds

Matriconditioning of Vegetable Seeds to Improve Stand Establishment in Early Field Plantings

Germination and Seedling Emergence of Primed Tomato and Asparagus Seeds under Adverse Conditions

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Osmoconditioning of Carrot Seeds to Improve Seedling Establishment and Yield in Cold Soil1

Cited by 48 publications

References 4 publications

Germination and vigour of primed asparagus seeds

Germination and vigour of primed asparagus seeds

Matriconditioning of Vegetable Seeds to Improve Stand Establishment in Early Field Plantings

Germination and Seedling Emergence of Primed Tomato and Asparagus Seeds under Adverse Conditions

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Osmoconditioning of Carrot Seeds to Improve Seedling Establishment and Yield in Cold Soil¹