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The effects of certain carbohydrates and amino acids on growth and respiration of Fusarium solani f. sp. pisi

Devinder Kumar Garg and Radhey Shyam Mehrotra
Phytopathologia Mediterranea
Vol. 15, No. 2/3 (Dicembre 1976), pp. 103-105
Stable URL: http://www.jstor.org/stable/42685489
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The effects of certain carbohydrates and amino acids on growth and respiration of Fusarium solani f. sp. pisi
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Abstract

The relative growth supporting values and also the effect on endogenous respiration of carbohydrates and amino acids were determined in the case of Fusarium solani f. sp. pisi (Jones) Snyd. et Hans. Out of the nine carbohydrates mannitol and sucrose increased the rate of respiration considerably. Ribose, mannose, raffinose and dextrose showed stimulation in the rate of respiration while three disaccharides i. e. maltose, cellobiose and lactose inhibited the rate of respiration. All the carbohydrates were utilized well but dextrose, maltose and raffinose gave more weight of mycelium of the pathogen as compared to sucrose. Out of twenty amino acids, proline and hydroxyproline very strongly stimulated both the processes. Leucine and isoleucine were not well utilized for mycelial growth but stimulated the rate of respiration. Glycine, threonine, serine, tryptophan, tyrosine, alanine, phenylalanine, histidine and methionine though showed good mycelial growth yet strongly inhibited respiration. Valine and lysine showed moderate utilization and increase of respiration. Arginine, aspartic acid and glutamic acid stimulated the respiration and were very well utilized for mycelial growth by the pathogen. Cysteine and cystine were moderately utilized for growth, negligibly inhibited the rate of respiration. Sono stati determinati l'accrescimento del micelio e la respirazione di Fusarium solani f. sp. pisi (Jones) Snyd. et Hans, in presenza di vari carboidrati e amminoacidi. Fra nove carboidrati, mannitolo e saccarosio hano indotto un considerevole aumento nella respirazione. Ribosio, manosio, raffinosio e destrosio hanno stimolato il tasso di respirazione mentre tre disaccaridi: maltosio, cellobiosio e lattosio, lo hanno inibito. Tutti i carboidrati sono stati bene utilizzati dal fungo; destrosio, maltosio e raffinosio hanno favorito un aumento di peso del micelio rispetto a saccarosio. Di venti amminoacidi, prolina e idrossiprolina hanno stimolato entrambi i processi. Leucina e isoleucina non hanno indotto incrementi di peso del micelio ma hanno favorito la respirazione. Glicina, treonina, serina, triptofano, tirosina, alanina, fenilalanina, istidina e metionina, pur favorendo l'accrescimento del micelio, hanno fortemente inibito la respirazione. Valina e Usina sono state moderatamente utilizzate e hanno moderatamente favorito la respirazione. Arginina, acido aspartico e acido glutammico hanno stimolato la respirazione e sono stati ben utilizzati per l'accrescimento del micelio. Cisteina e cistina, moderatamente utilizzate per la crescita del micelio, hanno inibito in forma trascurabile la respirazione. On a déterminé l'accroissement du mycelium et la respiration de Fusarium solani f. sp. pisi (Jones) Snyd. et Hans, en présence de différents carbohydrates et aminoacides. Parmi neuf carbohydrates, manitol et sucrose ont causé une augmentation remarquable dans la respiration. Ribose, mannose, raffinose et dextrose ont stimulé le taux de respiration tandis que trois disaccharides, à savoir, maltose, cellobiose et lactose ont inhibé le taux de respiration. Tous les carbohydrates ont été bien utilisés par le champignon; dextrose, maltose et raffinose ont favorisé une augmentation de poids du mycelium par rapport au sucrose. Sur vingt aminoacides, proline et hydroxyproline ont stimulé les deux processus. Leucine et isoleucine n'ont pas causé une augmentation de poids du mycelium mais ont stimulé la respiration. Glycine, threonine, serine, tryptophane, tyrosine, alanine, phenylalanine, histidine et methionine tout en favorisant l'accroissement du mycelium, ont pourtant inhibé fortement la respiration. Valine et Usine ont été peu utilisées et ont modérément favorisé la respiration. Arginine, acide aspartique et acide glutammique ont stimulé la respiration et ont été bien utilisés pour l'acroissement du mycelium. Cysteine et cystine modérément utilisées pour l'accroissement du mycelium ont peu inhibé la respiration.

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