Unidentified Growth Factors in Brewer's Yeast: Ii. Some Chemical and Physical Properties of These Factors

Charbonneau, René; Lemonde, A.

doi:10.1139/z60-047

Can. J. Zool.

1960

DOI: 10.1139/z60-047

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Unidentified Growth Factors in Brewer's Yeast: Ii. Some Chemical and Physical Properties of These Factors

René Charbonneau¹,

A. Lemonde²

Abstract: Brewer's yeast contains some unknown growth factors necessary for the normal development of Tribolium confusum. These factors, destroyed by ashing, are organic substances insoluble in ethanol, ether, and benzene. Temperatures as high as 125" C do not affect their activity. At 150" C, the growth-promoting effect is decreased. These factors are destroyed by strong acids and slightly affected by strong alkalis. Maximum growth stimulation is obtained between pH 6.0 and 8.8. The presence in water-soluble yeast frac… Show more

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1987

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Cited by 5 publications

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Nutritional modulation of reproduction in two phytophagous insect pests

Krishna

1987

Proc. Indian Acad. Sci. (Anim. Sci.)

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In Earias vinella (F.) (a major noctuid pest of malvaceous crops) changes in the larval food quality (developing seeds, rnesocarp. epicarp of okra fruit or the entire fruit; ovary of shoeflcwer] in either or both sexes led to pronounced disparities in the reproductive performance of the emerging moths. Highest breeding potential was observed when males and females obtained their nourishment. during postembryonic period. from developing seeds of okra of 0-8 days old and such nutrition must be made available for the caterpillars at least for the first 3 days of their lives to attain enhanced level of reproductive efficiency later as moths. During adult life, a carbohydrate nutrient was mandatory for these mated females to realize full fecundity which got tremendously boosted when the sugar was raffinose.Appreciable increase in ovarian weight with marked improvement in oviposition OCCUlTed in Trlbolium castaneum (Herbst) (a serious tcnebrionid pest of cereals and other plant-derived storedcommodities) when both larvae and adults ate whole flour instead of semolina, both enriched with yeasl. This became further augmented when the flour ingested by these beetles during adult life was previously extracted in 100'\ ethanol and then reinforced with yeast. However. whole wheat flour or yeast alone given as food to such reared adults caused a sharp fall in the egg deposition of females. Number of eggs laid by mated females also differed considerably when their imaginal diet consisted of one of certain selected nutrients. oilseeds or spices-all supplemented with yeast. Egg hatchability was always 100%

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Nutritional modulation of reproduction in two phytophagous insect pests

Krishna

1987

Proc. Indian Acad. Sci. (Anim. Sci.)

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Basic nutritional requirements of larvae of the bruchid beetle, Callosobruchus chinensis L.

Podoler

Applebaum

1971

Journal of Stored Products Research

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THE COMPARATIVE EFFECTS OF VITAMIN DEFICIENCY ON DEVELOPMENT AND ON ADULT FECUNDITY OF TRIBOLIUM CASTANEUM

Applebaum

Lubin

1967

Entomologia Exp Applicata

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When larvae of Tribolium castaneum were reared on diets deficient in thiamine, pyridoxine or riboflavin mortality was high and the rate of development was slow. The few surviving larvae did attain the same final stage as larvae developing on an all‐vitamin control. On diets deficient in nicotinic acid, calcium pantothenate or choline chloride all aspects of development were impaired and no pupation occurred. The negative effects of folic acid deficiency were more pronounced in the pupal stage than in the larval instars. The dietary deficiency of folic acid, choline chloride or thiamine, had no apparent effect on adult fecundity, and a dietary deficiency of any one of the seven vitamins assayed did not adversely affect egg fertility. Résumé EFFETS COMPARÉS D'UNE CARENCE EN VITAMINE SUR LE DÉVELOPPEMENT ET LA FÉCONDITÉ DE TRIBOLIUM CASTANEUM Une mortalité importante a été constatée chez des larves de Tribolium castaneum élevées sur des régimes déficitaires en thiamine, pyridoxine et riboflavine. Le développement a été ralenti d'une façon considérable, mais les larves qui ont survécu sont arrivées au même stade final que les larves témoins nourries avec toutes les vitamines. Tous les autres régimes alimentaires ont été moins adéquates que celui contenant un supplément de levure. L'effet de l'absence de l'acide nicotinique, du pantothenate de calcium ou bien du chlorure de choline a été encore plus net, car les larves ne se sont pas nymphosées. Cet effet prononcé de l'insuffisance du chlorure de choline contraste avec la réaction de Tribolium confusum à l'absence de chlorure de choline dans le régime alimentaire. Le développement larvaire a été peu affecté par l'absence de l'acide folique. Mais, durant la nymphose, les effets négatifs se manifestent davantage encore. L'absence de pyridoxine, riboflavine, acide nicotinique ou pantothenate du calcium a réduit d'une façon importante le taux initial de la fécondité des adultes de T. castaneum. L'absence de l'acide folique, chlorure de choline ou thiamine n'a pas été marquée par un effet semblable. La fertilité des œufs n'a pas été affectée par le manque d'une vitamine quelconque. Ces résultats indiquent que le chlorure de choline et la thiamine sont nécessaires pour le développement larvaire, mais qu'elles sont peu importantes pour la vitalité des adultes. Les réserves en certaines vitamines essentielles chez les nymphes suffisent donc aux exigences des adultes, au moins pendant quelques mois après leur éclosion.

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Unidentified Growth Factors in Brewer's Yeast: Ii. Some Chemical and Physical Properties of These Factors

Cited by 5 publications

References 13 publications

Nutritional modulation of reproduction in two phytophagous insect pests

Nutritional modulation of reproduction in two phytophagous insect pests

Basic nutritional requirements of larvae of the bruchid beetle, Callosobruchus chinensis L.

THE COMPARATIVE EFFECTS OF VITAMIN DEFICIENCY ON DEVELOPMENT AND ON ADULT FECUNDITY OF TRIBOLIUM CASTANEUM

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