Study of Seed Dormancy in Colocynth (Citrullus colocynthis L.) with After-Ripening of Fruits, Seed Extraction Procedures and Period of Seed Storage

Mahajan, S. S.; Kumawat, R. N.

doi:10.1007/s40009-013-0146-y

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…Storage of C. colocynthis fresh seed from an Indian population resulted in reduction of the germination from 72.9% for fresh seeds to only 16.4% after one year [ 59 ]. This was attributed to the increase of seed coat hardening that limited the gas exchange between the embryo and surrounding atmosphere [ 59 ]. In the present study, one-year storage of dormant seeds collected in March didn’t result in any alleviation in the dormancy level.…”

Section: Discussionmentioning

confidence: 99%

Effect of maturation time on dormancy and germination of Citrullus colocynthis (Cucurbitaceae) seeds from the Arabian hyper-arid deserts

et al. 2017

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BackgroundLight and temperatures of germination greatly affect germination of several Cucurbitaceae species. Environmental conditions prevailing at seed maturation time can affect dormancy and germination requirements. Citrullus colocynthis seeds have a deep dormancy. This perennial prostrate shrub grows all over the year in the arid Arabian deserts. We explored if seed dormancy and germination requirements of C. colocynthis depend on time of fruit collection. Matured seeds were collected at five different times during 2014/2015 year from a population around Dubai city. Fresh seeds were germinated at three temperature regimes in both continuous darkness and alternating 12 h light/12 h darkness. Impacts of seed storage and other treatments on germination were applied on seeds collected in March and exhibited deep dormancy.ResultsMarch collected seeds almost did not germinate in both light and dark at the three temperatures, but those of the other collections responded differently to both light and temperatures. At the lowest temperatures, seeds of all collections did not germinate in light, but those of June, October and December collections germinated in dark. There were negative correlations between final germination and seed length, width, mass and coat thickness. Physical scarification, water soaking and seed storage did not break dormancy of March collection.ConclusionsGermination of C. colocynthis is very sensitive to light and incubation temperature as well as to the environmental conditions associated with the time of seed maturation. It is important to investigate the effects of environmental factors prevailing during seed maturation under controlled conditions to understand exact reasons for unusual seed dormancy and germination requirements of C. colocynthis, which seems to be very sensitive to maternal environment.

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Section: Discussionmentioning

confidence: 99%

Effect of maturation time on dormancy and germination of Citrullus colocynthis (Cucurbitaceae) seeds from the Arabian hyper-arid deserts

et al. 2017

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“…At a sowing density of 4 plants per m 2 , the seed yield of C. colocynthis accessions ranged from 0.47 to 14.95 tonnes/ha, with an overall average of 5.17 tonnes/ha (Menon et al, 2016). In the Pakistan desert, some accessions that have an extensive root system even under limited irrigation conditions can produce up to 1 to 1.5 t of seeds (Mahajan and Kumawat, 2013).…”

Section: Discussionmentioning

confidence: 99%

Variability analysis of the seeds and oil yields of several accessions Citrullus colocynthis (L.) collected in Morocco

Abdelhamid¹,

Said²

2019

IJFSA

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The ripe fruits of Citrullus colocynthis (L.) Schrad was collected in 12 different localities in Morocco to evaluate the variability of seed and oil yields. The measured traits are: seed weight (SW), seed number (SN), the weight of 100 seeds (W 100), seed oil content (OC), seeds yield (SY) and oil yield (OY). The seed oil content is ranging between 17 and 24 % of seed weight. The extrapolated seed yield among the accessions ranged from 156 to 816 Kg ha-1 , with an overall mean of 413 Kg ha-1. The oil yield varied between 35 to 172 Kg ha-1. The oil extracted from the seed revealed high levels of unsaturated fatty acids (74 %) with C 18: 2 (60.06 %) and C 18: 1 (11.14 %). The results of ANOVA (GLM) show significant and very highly significant effects according to the characters measured. Significant variability was observed for seed and oil yields. This variability could be exploited for the selection of accessions with high oil yields.

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“…C. colocynthis has only one accepted name but six synonyms (The Plant List, 2017). In India and Pakistan, it is known as tumba (Mahajan and Kumawat, 2013;Hussain et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…colocynthis is able to withstand extreme desert temperatures through a high rate of transpiration to lower leaf temperatures below lethal temperatures (Althawadi and Grace, 1986). In the Thar Desert in Pakistan, the perennial plant develops an extensive root system, and despite only receiving only 35-40 mm of rainfall per hectare, can produce as much as 1-1.5 t of seed, but as much as 40-fold more if rainfall is high (Mahajan and Kumawat, 2013). Exploring this ability of C. colocynthis to grow in arid climates, Schafferman et al (2001) assessed 28 accessions growing wild in Negev, Arava and Sinai Deserts in Israel, and found that the mean seed oil yield ranged from 17.1% to 19.5% (v/w) in five high-yielding lines (dry seed weight basis).…”

Section: Introductionmentioning

confidence: 99%

“…colocynthis seeds exhibit strong dormancy, and even strong chemical or physical treatments are unable to release the seeds from this state of dormancy (Koller et al, 1963;El-Hajzein and Neville, 1993), although scarification of the testa using sandpaper resulted in 61% germination (Saberi and Shahriari, 2011). Mahajan and Kumawat (2013) observed 51.4% germination of seeds taken from fresh fruits and placed at 30°C and 95% relative humidity whereas 48 h fermentation increased germination to 58.8%, and decreased to 16.4% after storage for 12 months at room temperature. Sen and Bhandari (1974) achieved 98% germination after 4.5 h of treatment with concentrated sulphuric acid and germination in the dark since exposure to light inhibited germination.…”

Section: Introductionmentioning

confidence: 99%

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Citrullus colocynthis (L.) Schrad. (colocynth): Biotechnological perspectives

Silva¹,

Hussain

2017

Emir. J. Food Agric

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Study of Seed Dormancy in Colocynth (Citrullus colocynthis L.) with After-Ripening of Fruits, Seed Extraction Procedures and Period of Seed Storage

Cited by 5 publications

References 16 publications

Effect of maturation time on dormancy and germination of Citrullus colocynthis (Cucurbitaceae) seeds from the Arabian hyper-arid deserts

Effect of maturation time on dormancy and germination of Citrullus colocynthis (Cucurbitaceae) seeds from the Arabian hyper-arid deserts

Variability analysis of the seeds and oil yields of several accessions Citrullus colocynthis (L.) collected in Morocco

Citrullus colocynthis (L.) Schrad. (colocynth): Biotechnological perspectives

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