Changes during Development in the Nitrogen, Uncombined Amino Acid and Carbohydrate Contents of Cotyledons from Different Cultivars and Lines of Field Bean (Vicia faba L.)

SUMMARYWinter bean crops, mainly of the variety Throws MS, were surveyed for proportions of cross-bred seed, using hilum colour as a genetic marker. In 1971 a significantly greater proportion of cross-breds was detected in random samples taken from the centre than in similar samples from the border of three fields and from the total of all seven fields. An hypothesis is proposed that pod setting at the centre was limited more than at the border by a factor such as plant competition and chocolate spot at a time when selfing was enforced due to a general lack of bee visitation, or else inbred embryos aborted more under the stress of disease in the centre. No differences between centre and border were found in 1972 except for a greater proportion of cross-breds from the border of a Maris Beagle field and this only applied to parent plants of certain genotypes.Significant differences were also found between fields and between seasons. There was a significant regression of percentage selfing on field size but there was no evidence that bees failed to penetrate to the centre of large fields.Implications for variety development, testing and purity are discussed.

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Purification and properties of α-galactosidases from Vicia faba seeds

Biochemical Journal ◽

10.1042/bj1130049 ◽

1969 ◽

Vol 113 (1) ◽

pp. 49-55 ◽

Cited By ~ 84

Author(s):

P. M. Dey ◽

J. B. Pridham

Keyword(s):

Amino Acid ◽

Vicia Faba ◽

Aromatic Amino Acid ◽

Gel Filtration ◽

Disc Electrophoresis ◽

Thermal Stabilities ◽

Molecular Weights ◽

Purification And Properties ◽

Enzyme I ◽

Carbohydrate Contents

Two forms of α-galactosidase, I and II, exist in Vicia faba seeds and these have been purified 3660- and 337-fold respectively. They behaved as homogeneous preparations when examined by ultracentrifugation, disc electrophoresis and gel filtration. The apparent molecular weights of enzymes I and II, as determined by gel filtration, were 209000 and 38000 respectively. The carbohydrate contents of enzymes I and II were 25% and 2·8% respectively, and the enzymes differed in their aromatic amino acid compositions. Enzyme I was split into six inactive subunits in the presence of 6m-urea. α-Galactosidases I and II showed different pH optima and Km and Vmax. values with p-nitrophenyl α-d-galactoside and raffinose as substrates, and also differed in their thermal stabilities.

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Estimates of the frequency of fertilization in field beans (Vicia faba L.)

The Journal of Agricultural Science ◽

10.1017/s002185960003241x ◽

1983 ◽

Vol 100 (1) ◽

pp. 25-33 ◽

Cited By ~ 12

Author(s):

G. G. Rowland ◽

D. A. Bond ◽

Mary L. Parker

Keyword(s):

Vicia Faba ◽

Field Bean ◽

Vicia Faba L ◽

Ovule Position ◽

Flower Position ◽

Field Beans

SUMMARYFertilization of four field bean cultivars was examined in irrigated and non-irrigated plots. The overall fertilization of the ovules examined was 33%; in irrigated plots it was 25% and in non-irrigated plots, 41%. Only 48% of fully formed flowers had at least one fertilized ovule. Fertilized ovules occurred most frequently at the first ovule position in the ovary (nearest the stigma), and this frequency declined at successive ovule positions. There was in general a higher fertilization percentage at the upper flowering nodes while fertilization percentage dropped from the first flower position in a raceme to the last. At all the flowering nodes and raceme-flower positions, the cultivars Erfordia and Outlook generally had a higher fertilization frequency than Maris Bead or TI. The significance of these results is discussed.

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