Impact of Temperature on Seed Dormancy

Geneve, Robert L.

doi:10.21273/hortsci.38.3.336

Cited by 55 publications

(40 citation statements)

References 41 publications

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“…Seed germination is controlled by several environmental factors, such as seed moisture content, temperature, and light. Seed condition also affects germination; for example, the seed coat may be water impermeable, or the mature seed may contain an underdeveloped embryo that only grows to full size after imbibition [4,5]. In Japan, fully ripened fruits of A. crenata are usually harvested in winter.…”

Section: Introductionmentioning

confidence: 99%

Seed and Embryo Germination in Ardisia crenata

et al. 2012

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Ardisia crenatais an evergreen shrub with attractive bright red berries. Although this species is usually propagated by seed, the seeds take a long time to germinate with conventional sowing methods. We investigated the germination capacity of seeds and embryos collected in different months and the effects of seed storage conditions, germination temperature, water permeability of the seed coat, and the endosperm on seed germination. Seeds and embryos collected in late September or later showed good germination rates. Seeds germinated more rapidly after longer periods of storage at low temperature (approximately 5°C), and those stored in dry conditions showed lower emergence frequency than those stored in wet conditions. Seeds germinated at 15–30°C, but not at 5–10°C. Removal of the seed coat enhanced water uptake and seed germination. Seeds with various proportions of the removed seed coat were sown on a medium supplemented with sucrose. The germination frequency increased as the size of the remaining endosperm decreased. However, the opposite results were obtained when seeds were sown on a medium without sucrose. We concluded that the optimal temperature of 25°C is the most critical factor for seed germination inA. crenata.

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Section: Introductionmentioning

confidence: 99%

Seed and Embryo Germination in Ardisia crenata

et al. 2012

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“…Germination is regulated by environmental, genetic, and physiological factors and is often preceded in non-domesticated plants by a period of seed dormancy. An important environmental factor for breaking dormancy and germination is the temperature response of the species (Benech-Arnold et al 2000;Geneve 2003). Many seeds have an obligate or facultative requirement for diurnal fluctuation in temperature to stimulate germination (Fenner and Thompson 2005).…”

Section: Introductionmentioning

confidence: 99%

Initial changes in the transcriptome of Euphorbia esula seeds induced to germinate with a combination of constant and diurnal alternating temperatures

et al. 2009

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We investigated transcriptome changes in Euphorbia esula (leafy spurge) seeds with a focus on the effect of constant and diurnal fluctuating temperature on dormancy and germination. Leafy spurge seeds do not germinate when incubated for 21 days at 20 degrees C constant temperatures, but nearly 30% germinate after 21 days under fluctuating temperatures 20:30 degrees C (16:8 h). Incubation at 20 degrees C for 21 days followed by 20:30 degrees C resulted in approximately 63% germination in about 10 days. A cDNA microarray representing approximately 22,000 unique sequences was used to profile transcriptome changes in the first day after transfer of seeds from constant to alternating temperature conditions. Functional classification based on MIPS and gene ontology revealed active metabolism including up-regulation of energy, protein synthesis, and signal transduction processes. Down-regulated processes included translation elongation, translation, and some biosynthetic processes. Subnetwork analysis identified genes involved in abscisic acid, sugar, and circadian clock signaling as key regulators of physiological activity in seeds soon after the transfer to alternating conditions.

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“…For producing a desirable variety budding or grafting is required (Taylor and Whitehead, 1977). Seeds of Apple are incompetent of germinating at the time of harvest, post-harvesting period and after removing from fruit flesh because they remain in different dormant states including deep physiological endogenous dormancy, embryonic dormancy, testa imposed dormancy and thermodormancy (Geneve, 2003;Lewak, 2011 andMilitaru et al, 2009).…”

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Effect of Gibberellic Acid, Potassium Nitrate and Chilling on Seed Germination Response of Apple (Pyrus Malus L. Cv. Red Delicious)

Joshi¹,

Kumar²,

Nailwal³

2016

IJAR

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Premise of research: Apple (Pyrus malusL.cv.Red delicious) is an important cash crop which aids in socioeconomic development of the farmers in the Uttarakhand state. The delicious and its strains have gained popularity all over the world and are cultivated on a large scale in India. More than 80% of the area is under the delicious group cultivation in India. In Uttarakhand the yield of this crop is getting reduced year after year. This corresponds to many biotic and abiotic factors. One of the main reasons is Global warming. In spite of favourable weather conditions, seeds do not germinate and remain in dormant stage. So, our aim was to investigate the influence of pregermination treatments on Apple seeds under lab conditions to find out the most promising technique. Methodology:The effect of GA 3 , KNO 3 and stratification to determine the seed germination response for various time duration was observed. Total 10 germination parameters were measured. Pivotal results:The highest GRI, CGRI, GV1, GV2 and GS/day were recorded in seeds treated with 0.1% KNO 3 for 48hrs. Lowest MGT and highest CVG were found in combination of (250 ppmGA 3 +0.1%KNO 3) in 24 hrs. Combination of (1000 ppmGA 3 +0.3%KNO 3) treated seeds for 48 hrs showed maximum FGP and MDG value. GSP was highest of all in 0.1% KNO 3 treated seeds applied for 48 hrs. Conclusion:Our study clearly depicted that germination percentage can be increased by giving a pre-sowing treatment to seeds with a combination of (1000 ppm GA 3 +0.3% KNO 3) for upto 48 hrs. This is by-far the most effective and simplest method that could be easily adopted by the farmers for improving and enhancing the economic cultivation of this variety. Hence, germination of Apple seeds can be increased by inundating the seeds with GA 3 and KNO 3 before sowing.

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Impact of Temperature on Seed Dormancy

Abstract: Seed dormancy is an ecological adaptation that allows seasonal timing of germination for seeds in a population. Several environmental

Cited by 55 publications

References 41 publications

Seed and Embryo Germination in Ardisia crenata

Seed and Embryo Germination in Ardisia crenata

Initial changes in the transcriptome of Euphorbia esula seeds induced to germinate with a combination of constant and diurnal alternating temperatures

Effect of Gibberellic Acid, Potassium Nitrate and Chilling on Seed Germination Response of Apple (Pyrus Malus L. Cv. Red Delicious)

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