Dormancy in Seeds of Charlock: II. THE INFLUENCE OF THE SEED COAT

“…Similar results have been reported, in which GA applications partially relieved the inhibitory effect that O2 concentrations had on germination (Vamer 1964, Negbi et al 1966, Edwards 1968). Moreover, GA application could also relieve the inhibitory effect of low temperature in cotton (Cole and Wheeler 1974), pepper (Watkins and Cantliffe 1983), tomato (Groot and Karssen 1987), melon (Nelson andSharpies 1980, Edelstein andKigel 1990) and cucumber seeds (Sitnon et al 1976).…”

Section: Discussionsupporting

confidence: 83%

Role of endogenous gibberellins in germination of melon (Cucumis melo) seeds

Edelstein¹,

Tal²,

Wodner³

et al. 1995

Physiol Plant

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J. 1995. Role of endogenous gibberellins in germination of melon (Cucumis melo) seeds. -Physiol. Plant. 95: 113-119.The effect of the plant growth retardants ancymidoi, mefluidide and uniconazole on germination of two melon accessions differing in their ability to germinate at 14°C was examined. The accessions were the cold sensitive Ncy Yizre e! and the cold tolerant Persia 202. The three growth retardants were able to delay the germination of intact Noy Yizre'el seeds, but did not affect that of intact Persia 202 seeds. On the other hand germination of decoated seeds of both accessions was unaffected by these inhibitors at normal oxygen concentration, but was inhibited at 5% oxygen. When gibberelhn-like activity was measured by a dwarf rice biological assay following HPLC fractionation, it was found that seeds of Persia 202 contained much more gibberellin-like activity than Noy Yizre'el seeds. Among the extracted compounds several endogenous gibberellins were identified by combined gas chromatography-mass spectrometry (GC-MS). They included GAj, GAJB, GA, and GA, in Noy Yizre'el and GA,4, GAj), GA| and GAs in Persia 202. It is suggested that the better germination of intact Persia 202 seeds, compared to Noy Yizre'el seeds at low temperature and low oxygen concentration, is due to a higher endogenous level of GA and a better seed coat permeability to oxygen.

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“…This inhibitor is apparently produced by the seed coat (testa) (Witcombe, Hiliman and Whittington, 1969) and seems to be present in the seed coat of all seeds in apparently similar quantities (see Edwards, 1968a for a detailed description of seed anatomy). The inhibition is broken down by oxidation (Edwards, 1969) and the effect of the seed coat in dormant seed appears to be to prevent this oxidation taking place by being impermeable to oxygen (Edwards, 1968b). The seed coat is clearly of maternal origin and hence control of dormancy is maternal.…”

Section: Introductionmentioning

confidence: 99%

The inheritance of seed dormancy in Sinapis arvensis L.

Garbutt

Witcombe

1986

Heredity

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Selection for dormant and non-dormant seed in Sinapis arvensis was carried to the seventh and fourteenth generation, respectively. Crosses between the dormant and non-dormant lines clearly showed both a maternal and an embryonic component of seed dormancy. A model for the number of alleles controlling dormancy was constructed and tested. The maternal component of dormancy was shown to be controlled by a single locus with two alleles, the dormant allele being dominant to the non-dormant. No clear picture of the control of the embryonic component of dormancy was found.

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Dormancy in Seeds of Charlock: II. THE INFLUENCE OF THE SEED COAT

Cited by 27 publications

References 16 publications

The Effect of Sodium Hypochlorite, Gibberellic Acid and Light on Seed Dormancy and Germination of Stinkweed and Wild Mustard

The Effect of Sodium Hypochlorite, Gibberellic Acid and Light on Seed Dormancy and Germination of Stinkweed and Wild Mustard

Role of endogenous gibberellins in germination of melon (Cucumis melo) seeds

The inheritance of seed dormancy in Sinapis arvensis L.

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