Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Demir, I.; Kenanoğlu, Burcu Begüm; Mavi, Kazım; Çelikkol, Tuba; Hay, Fiona R.; Sariyildiz, Zeliha

doi:10.21273/hortsci.44.6.1679

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…The difference between the two storage methods was significant at the final sampling (48 months) for three cultivars but was significant at 24, 36 and 48 months for the Yaglik cultivar. Our results about the advantages of vacuum storage (oxygen is not available) were reported earlier for various crop seeds (Barzali et al, 2005;Ellis and Hong, 2007;Demir et al, 2009;Schwember and Bradford, 2011;Gonzales-Benito et al, 2011;Soh et al, 2014;Groot et al, 2015;Han et al, 2021) compared to open-air storage ones. The effect of vacuum storage was more prominent at low seed moisture contents than higher one (Ellis and Hong, 2007).…”

Section: Resultssupporting

confidence: 85%

Vacuum Versus Open Air Storage for Pepper (Capsicum annuum L.) Seed Longevity with Low Temperature and Seed Moisture Content Over 48 Months

Yildirim

Öztürk

Demir

2021

Horticultural Studies

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This study was carried out to test the effect of vacuum and open-air storage on seed germination, oil content, and sugar contents of four pepper cultivars. Seeds were stored at 13°C with 35% relative humidity over 48 months in vacuum packets or in perforated cheese cloth in a storage room. Seed samples were examined at 12, 24, 36 and 48 months. Seed germination, oil content and sugar contents were determined. Seed germination declined gradually as storage time extended. Vacuum storage had significantly higher (P<0.05) germination than oxygen storage after 48 months of storage for all cultivars. Differences between the two storage methods were not significant for the other samples, except Yaglik in which vacuum storage had higher values from 24 months onwards during storage. Total oil content declined in all cultivars but the decline was faster in seeds stored in the open air. A similar trend was also observed for sugar contents. Seeds stored in the presence of oxygen lost sugar content faster than vacuum-stored seeds. Results indicated that storage with vacuum conditions (no oxygen) extended the longevity of pepper seeds.

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Section: Resultssupporting

confidence: 85%

Vacuum Versus Open Air Storage for Pepper (Capsicum annuum L.) Seed Longevity with Low Temperature and Seed Moisture Content Over 48 Months

Yildirim

Öztürk

Demir

2021

Horticultural Studies

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“…There are numerous studies on longevity of conventionally-produced pepper seeds (Thanos et al, 1989;Sundstrom, 1990;Sanchez et al, 1993;Basay et al, 2006;Demir and Ozcoban, 2007;Demir et al, 2009;Caixeta et al, 2014;Panayotov and Aladjadjiyan, 2014;Adam et al, 2018;Verma et al, 2018). Nevertheless, organic seed production systems are different than conventional ones and require specific measures for production (Anonymous, 2010).…”

Section: Introductionmentioning

confidence: 99%

Longevity of organic pepper (Capsicum annuum L.) seeds

Yildirim

Özden

Gökdaş

et al. 2020

Not Bot Horti Agrobo

Self Cite

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This study was carried out to determine seed longevity in organic and conventionally produced pepper seeds from four different pepper cultivars. Seeds were stored at 20± 2 oC with 7.5±0.5 seed moisture over 48 months. Longevity of seeds were evaluated with Ki (initial seed quality), P50 (half-viability period), σ (standard deviation of distribution of seed deaths in time), and regression coefficient values. The highest longevity was observed in ‘Corbaci’ and ‘Yaglik’ cultivars, while ‘Surmeli’ and ‘K. Dolma’ were found to have shorter longevity. P50 was 43.4 and 40.2 months for ‘Corbacı’ and 34.9 and 39.7 months for ‘Yaglık’ organic and conventional cultivars, respectively, whereas it was about 21.4 and 23.7 months in ‘K. Dolma’ and ‘Surmeli’ cultivars. Similarly, the highest σ and regression coefficient values were observed for ‘Corbaci’ and the lowest for ‘Surmeli’ cultivars. Organic and conventional pepper seed longevity was not different in the same species. Regression coefficient values were 0.043 in organic and 0.046 in conventional seeds for ‘Corbaci’. Very close values were found between the two production systems for the other cultivars too. Results indicate that organic seeds had similar longevity to conventional ones. The main differences originated from the cultivars, not from the production system.

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“…This equation can be used to estimate the viability of seeds in hermetic storage (seeds stored inside a container with a limited volume of air and an air-tight seal), at constant moisture content and temperature, and can therefore aid the management of stored seeds (e.g. Ellis and Hong, 2007; Demir et al , 2009).…”

Section: Introductionmentioning

confidence: 99%

Modelling seed germination in response to continuous variables: use and limitations of probit analysis and alternative approaches

2014

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Probit-based models relating a proportional response variable to a temporal explanatory variable, assuming that the times to response are normally distributed within the population, have been used in seed biology for describing the rate of loss of viability during seed ageing and the progress of germination over time in response to environmental signals (e.g. water, temperature). These models may be expressed as generalized linear models (GLMs) with a probit (cumulative normal distribution) link function, and, using GLM fitting procedures in current statistical software, parameters of these models are efficiently estimated while taking into account the binomial error distribution of the dependent variable. The fitted parameters can then be used to calculate the ‘traditional’ model parameters, such as the hydro- or hydrothermal time constant, the mean or median response of the seeds (e.g. mean time to death, median base water potential), and the standard deviation of the normal distribution of that response. Furthermore, through consideration of the deviance and residuals, performing model evaluation and modification can lead to improved understanding of the underlying physiological/ecological processes. However, fitting a binomial GLM is not appropriate for the cumulative count data often collected from germination studies, as successive observations are not independent, and time-to-event/survival analysis should be considered instead. This review discusses well-known probit-based models, providing advice on how to collect appropriate data and fit the models to those data, and gives an overview of alternative analysis approaches to improve understanding of the underlying mechanisms of seed dormancy and germination behaviour.

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Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Cited by 6 publications

References 18 publications

Vacuum Versus Open Air Storage for Pepper (Capsicum annuum L.) Seed Longevity with Low Temperature and Seed Moisture Content Over 48 Months

Vacuum Versus Open Air Storage for Pepper (Capsicum annuum L.) Seed Longevity with Low Temperature and Seed Moisture Content Over 48 Months

Longevity of organic pepper (Capsicum annuum L.) seeds

Modelling seed germination in response to continuous variables: use and limitations of probit analysis and alternative approaches

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