High Temperature Seed Dormancy in Wheat (<i>Triticum aestivum</i> L.)<sup>1</sup>

George, Donald A. R.

doi:10.2135/cropsci1967.0011183x000700030024x

Cited by 35 publications

(24 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result agreed with the finding of Mares (1984) who reported that grains of nondormant varieties could germinate at 20oC in the early stages of grain-filling, while dormant varieties did not germinate at this temperature until the full-ripe stage or later. Similarly, George (1967) reported that matured grain of several varieties in the U.S. showed dormancy at 30oC but not at 10°C. The optimum temperature for germination increased after grain matured, indicating that dormancy was generally maintained until later stages of grain-filling in the varieties resistant to preharvest sprouting, while this was so only in the early stages of grain-filling at a low temperature.…”

Section: Discussionmentioning

confidence: 81%

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Ichinose

Kuwabara

Hakoyama

2002

Plant Production Science

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 81%

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Ichinose

Kuwabara

Hakoyama

2002

Plant Production Science

View full text Add to dashboard Cite

“…or amplified (George 1967). However, lines with no sprouting resistance are expected to germinate more quickly at higher temperatures (George 1967).…”

Section: Discussionmentioning

confidence: 99%

“…However, lines with no sprouting resistance are expected to germinate more quickly at higher temperatures (George 1967). This was not observed with the Genesis water controls in the pilot experiment (Table 2) where the mean germination times were very similar at 10 and 20°C.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Red smudge infection modifies sprouting response in four wheat lines

Fox¹,

Fernandez²,

DePauw³

2003

Can. J. Plant Sci.

View full text Add to dashboard Cite

(Ptr) causes kernel discolouration, reducing the commercial value of the grain. Preharvest sprouting in wheat causes loss of grain yield, grain functionality and value as seed. The objective of this research was to determine the effects of Ptr infection on the expression of preharvest sprouting response. Four genotypes representing a range of preharvest sprouting response were studied: RL4137 has very good sprouting resistance; SC8021V2, good; AC Karma, fair; and Genesis, poor. These genotypes were grown in a growth cabinet and their spikes were artificially inoculated with a conidial suspension of Ptr or water. Spikes were collected at physiologic maturity, threshed by hand and germinated on wetted filter paper at 10 or 20°C to obtain a percentage germination and a mean germination time. Healthy seeds were also germinated in a solution containing a crude extract of the fungus. At 20°C, sprouting-resistant genotypes showed a significant delay in germination compared to susceptible genotypes; however, differences were not significant at the lower temperature. Genesis germinated quickly at both temperatures. All genotypes except Genesis had reductions in sprouting resistance when infected by Ptr, but these effects were significant only at 20°C. When inoculated with Ptr and germinated at 20°C, AC Karma germinated as quickly as the water controls and gave a preharvest sprouting response similar to Genesis. However, SC8021V2 and RL4137 inoculated with Ptr retained 40 and 78%, respectively, of their mean germination time compared to the water controls. Germination of healthy seeds in a solution containing a crude extract of Ptr increased the percentage germination and shortened the mean germination time of all genotypes, but did not result in significant changes for any individual line. (Ptr) a des épis aux grains décolorés, ce qui en réduit la valeur marchande. D'autre part, la germination sur pied diminue le rendement grainier du blé, la fonctionnalité du grain et l'utilité de ce dernier comme semence. L'étude devait préciser les effets d'une infection par Ptr sur l'expression du caractère responsable de la germination sur pied. Les auteurs se sont intéressés à quatre génotypes traduisant une gamme de réactions au niveau de la germination sur pied : RL4137 (très bonne résistance), SC8021V2 (bonne résistance), AC Karma (résistance passable) et Genesis (piètre résistance). Ils ont cultivé les quatre lignées dans une chambre de croissance et infecté artificiellement les épis avec une suspension de conidies de Ptr ou de l'eau. Les chercheurs ont ensuite prélevé les épis à leur maturité physiologique, les ont battus à la main et en ont fait germer le grain sur des filtres en papier humides à 10 ou 20 °C, afin de calculer le pourcentage de germination et le temps de levée moyen. Ils ont aussi fait germer des semences saines dans une solution contenant un extrait brut du cryptogame. À 20°C, les génotypes résistants montrent un retard de germination important, comparativement aux génotypes sensibles. Néanmoins, on n'observe...

show abstract

“…That changes do occur in seeds during storage was shown by differences in germination and seedling growth. Poor germination at 25 C of seeds from A was caused by postharvest dormancy, which is known to occur in some red wheat varieties (10,14). This type of dormancy, often referred to as "high temperature dormancy" (10,14), can be broken by germinating at a lower temperature (20 C).…”

Section: Discussionmentioning

confidence: 99%

Metabolic Changes in Partially Dormant Wheat Seeds during Storage

Anderson

1970

Plant Physiol.

View full text Add to dashboard Cite

Seed deterioration generally is characterized by the loss of seedling vigor followed by the complete loss of germination (9). Some physiological and biochemical changes associated with deterioration have been reported recently (2,3 Germination Tests. Seeds were surface-disinfected for 5 min with 1% sodium hypochlorite, rinsed three times with sterile distilled water, and germinated on sterilized absorbent toweling in distilled water or 10-3 M GA3 at 25 C in the dark. Seeds were also germinated in rolled towels at 20 C (4). Only those seeds which produced normal seedlings at 4 days were counted as germinated.Pathological Tests. The percentage of seeds from each storage condition infected with storage fungi was determined by placing surface-disinfected seeds on 10% NaCl malt agar (8) and storing the plates in a high humidity box in the laboratory for 10 to 20 days. The fungi growing from the seeds were classified as either storage or field fungi.Glucose Utilization. Seeds were imbibed in sterile water containing 50 Ag/ml each of penicillin G and streptomycin sulfate, then incubated in glucose-U-14C as described by Abdul-Baki (1). The CO2 was collected in either hyamine hydroxide or saturated Ba(OH)2. After incubation, the seeds were washed three times with ice-cooled water and were frozen until they were fractionated by a modification of the procedure described by Abdul-Baki (1). Seeds were homogenized in ice-cooled water, boiled for 45 min, cooled, made to 80% (v/v) ethanol, and kept at 4 C overnight. The preparation was centrifuged, and the supernatant was decanted and saved. The pellet was washed three times in 80% ethanol, and the washes were combined with the original supernatant. The supernatant contained the unutilized sugars, organic and amino acids, and other ethanol-soluble components (1). The precipitate contained the radioactivity which had been converted into polysaccharides and proteins.Aliquots of the ethanol-soluble and ethanol-insoluble (resuspended in water) fractions were taken for measurement of radioactivity by liquid scintillation using 10 ml of scintillation solution (6). Radioactivity in the BaCO3 was determined in this scintillator whereas the '4CO2 in hyamine was detected in a scintillator containing 4 g of 2, 5-diphenyloxazole plus 50 mg of 1 ,4-di-2-(5-phenyloxazolyl)benzene per liter of toluene.

show abstract

High Temperature Seed Dormancy in Wheat (Triticum aestivum L.)¹

Cited by 35 publications

References 0 publications

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Red smudge infection modifies sprouting response in four wheat lines

Metabolic Changes in Partially Dormant Wheat Seeds during Storage

Contact Info

Product

Resources

About

High Temperature Seed Dormancy in Wheat (Triticum aestivum L.)1

Cited by 35 publications

References 0 publications

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Germination of Wheat Grains at Various Temperatures in Relation to the Activities of α-Amylase and Endoprotease

Red smudge infection modifies sprouting response in four wheat lines

Metabolic Changes in Partially Dormant Wheat Seeds during Storage

Contact Info

Product

Resources

About

High Temperature Seed Dormancy in Wheat (Triticum aestivum L.)¹