The effect of rain on β-glucan content in barley grains

Aastrup, Sten

doi:10.1007/bf02906187

Cited by 79 publications

(33 citation statements)

References 12 publications

(8 reference statements)

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“…This effect is quite clear in Triumph, even when the difference in the drymatter curves is taken into account. The data obtained thus confirm the results reported by AASTRUP (1).…”

Section: Phytotron Studysupporting

confidence: 91%

“…Minerva and Triumph were grown as single plants in pots on trolleys in the phytotron of the Royal College of Forestry in Stockholm (1,39). The plants were grown on a sterile substrate of fine stones, sand and perlite, nutrient being supplied by watering with dilute Hoagland solution until the plants water requirements were satisfied.…”

Section: Plantsmentioning

confidence: 99%

“…Screening methods for flour betaglucan content, based on the viscosity it induces in aqueous extracts, have been devised by BENDELOw (5) and MORGAN (32), and used to study the inheritance of barley flour extract viscosity (1). However, the in vivo synthesis of beta-glucans has not previously been studied in barley, so a method of assaying specific glucan fractions sequentially has been devised and used to study four commercial barley cultivars with different malting properties.…”

Section: Introductionmentioning

confidence: 99%

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Relationship of mixed-link beta-glucan accumulation to accumulation of free sugars and other glucans in the developing barley endosperm

Coles

1979

Carlsberg Res. Commun.

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Accumulation of free sugar, starch, mixed-link beta-glucan and hemicellulose in developing barley endosperms was investigated using a sequential enzymatic procedure. Bomi grown in a growth cabinet, the three cultivars Minerva, Lami and Triumph, grown in the field, and Minerva and Triumph grown under a range of water supply regimes in the phytotron were studied. The first experiments showed that initiation of synthesis occurred in the order hemicellulose, starch, mixed-link beta-glucan I 0 days, 11 days, and 17 days after fertilization, respectively. The second experiment indicated two separate accumulation patterns for mixed-link beta-glucan, one shared by Lami and Triumph, the other followed by Minerva. When moisture content declined to 40-50 %, the accumulation rate increased sharply in Lami and Triumph, but not in Minerva. A similar sharp increase in the rate of accumulation of hemicellulose was observed in Minerva and Triumph. The moisture stress experiment showed that water supply and humidity are the major factors mediating the response of beta-glucan content to environment, but that Triumph, a low-content genotype, was always lower in beta-glucan content than Minerva. Some implications of the results for elucidation of the control of endosperm development are discussed.

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“…This effect is quite clear in Triumph, even when the difference in the drymatter curves is taken into account. The data obtained thus confirm the results reported by AASTRUP (1).…”

Section: Phytotron Studysupporting

confidence: 91%

Section: Plantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relationship of mixed-link beta-glucan accumulation to accumulation of free sugars and other glucans in the developing barley endosperm

Coles

1979

Carlsberg Res. Commun.

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“…dry conditions before harvest have been related with high β-glucan levels (Anderson et al, 2003;Bendelow 1975). Hot and dry climate conditions, early harvesting time and increasing nitrogen rates give rise to increased viscosity of barley extracts, while rain induced a decrease in viscosity which could be related to the lower β-glucan content (Aastrup 1979). …”

Section: Annual Variation Of β-Glucan Contentmentioning

confidence: 99%

Varietal and Annual Variations of β-Glucan Contents in Korean Barley (Hordeum vulgare L.) and Oat (Avena sativa L.) Cultivars

Lee¹,

Yoo²,

Kim³

et al. 2011

Korean Journal of Crop Science

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Varietal and annual variations in the contents of β-glucan fractions per weight grain samples were examined in sixteen covered and eighteen naked barley and five oat cultivars developed in Korea. Also, the effect of pearling on β-glucan content was investigated. Average contents of total, soluble and insoluble β-glucan fractions were 5.25, 3.72, and 1.53%, respectively, in covered barley, and 5.86, 3.51, and 2.35%, respectively, in naked barley. Soluble β-glucan content was higher in covered barley, though total β-glucan content higher in naked barley. The total and insoluble β-glucan contents were higher in pearled grains. Total β-glucan content was higher in waxy barley than in non-waxy barley. Duwonchapssalbori, a two-rowed and waxy naked barley cultivar, was highest in total, soluble and insoluble β-glucan contents. Highly significant positive correlations were observed between total β-glucan and soluble β-glucan contents both in covered and naked barley. There were significant annual variations in total β-glucan content in barley. Average contents of total, soluble and insoluble β-glucans of oat cultivars were 4.33, 3.44, and 0.89%, respectively. Contents of all fractions of β-glucans were higher in barley than in oat. These results would be useful for the breeding of high β-glucan variety and also for the use barley and oat as valueadded food ingredients.Keywords : barley, oat, β-glucan, soluble β-glucan, waxysimply known as "β-glucan", are non-starch polysaccharides forming a major component of the endosperm cell walls and a minor component of aleurone cell walls of barley and oat grains (Newman et al., 1987).The structure of β-glucan is comprised of cellotriosyl and cellotetraosyl units linked through beta-1 → 3 linkages, which lead to kinks in the straight chain polymer, allowing water to get in between the chains and making β-gucan soluble in water. Therefore, β-glucan is classified as a soluble dietary fiber component. The degree of water solubility of a particular β-glucan is a significant factor in certain physiological effects. β-Glucan content and solubility of β-glucan in barley depends on genetic and environmental factors which affect interrelationships between cell wall constituents (Woodward et al., 1983, Charles & Louise, 2005. Although the relative contributions of these factors cannot be precisely quantified, there is a general agreement that the genetic background of the barley is more important than environmental conditions as a determinant of the final β-glucan content of the grain (Gill et al., 2002). Soluble dietary fiber reduces serum cholesterol and postprandial blood glucose levels in humans, mainly due to the formation of viscous solutions, which decrease the absorption of components (e.g. glucose, bile acids, cholesterol) by the intestine (Trogh et al., 2004;Newman et al., 1989). The viscosity depends on the concentration of dietary fiber components, their solubility and molecular weight. On the other hand, insoluble dietary fiber has a high water-binding capacity which i...

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“…At full ripeness the total ␤-glucan content for the raintreated plants was significantly lower than in grains from the control plants. In a study of barley grown in field on different locations in Denmark Aastrup 1 found that the extract viscosity was negatively correlated to the precipitation and to relative humidity. These field results confirm that extract viscosity and thus the soluble ␤-glucan content are affected during later stages of ripening by both precipitation and relative humidity.…”

Section: )Jjigxw Hyi Xs Psgexmsr Erh Gpmqeximentioning

confidence: 99%

Variation in Malting Quality and Heat Resistance in the Malting Barley Variety “Alexis”

Møller

Molina-Cano²,

Munck

2002

Journal of the Institute of Brewing

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In earlier studies concerning vigour, where subsamples are heat‐treated before germination there was found heat‐sensitive as well as heat‐resistant barley samples. The vigour model developed by Ellis and Roberts and further developed at Carlsberg, could only describe the heat‐sensitive barleys. Seventeen samples of the “Alexis” variety grown widely in Europe were collected from the EBC trials in 1994 in order to see if heat resistance in barley was influenced by different growing conditions. We found both heat‐sensitive samples following the vigour model as well as pronounced heat‐resistant samples, but these were not divided according to growing conditions. The germination curves dependent on heat treatment and germination time were evaluated by Principal Component Analysis (PCA). Heat‐resistant barley samples could be differentiated from heat‐sensitive samples already after ½ h of heat treatment at 68°C (12% moisture) and after 3 days of germination. The barley samples were analysed with regard to malting quality. The PCA evaluation of the data divided the samples according to growing location, mainly due to differences in protein and β‐glucan. However, the malting analyses could not describe the differences in heat resistance and sensitivity of the barleys. The biochemical background of the heat resistance found is discussed on the basis of literature. Our findings should give an experimental basis for exploiting a biochemical principle for heat resistance, which is formed during grain filling and consumed during storage and germination.

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The effect of rain on β-glucan content in barley grains

Cited by 79 publications

References 12 publications

Relationship of mixed-link beta-glucan accumulation to accumulation of free sugars and other glucans in the developing barley endosperm

Relationship of mixed-link beta-glucan accumulation to accumulation of free sugars and other glucans in the developing barley endosperm

Varietal and Annual Variations of β-Glucan Contents in Korean Barley (Hordeum vulgare L.) and Oat (Avena sativa L.) Cultivars

Variation in Malting Quality and Heat Resistance in the Malting Barley Variety “Alexis”

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