Changes in activities of the embden-meyerhof-parnas and pentose phosphate pathways during the growth cycle of Aspergillus niger

Smith, John E.; Valenzuela-Perez, J.; Ng, W.S.

doi:10.1016/s0007-1536(71)80084-0

Cited by 10 publications

(1 citation statement)

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“…Recent studies on carbon catabolism during the growth cycle of Aspergillus niger (Smith, Valenzuela-Perez & Ng, 1971) growing in flask culture indicated that the contribution of the EMP pathway was highest in conidiating mycelium, whereas the contribution of the PP pathway was highest in young vegetative mycelium growing under conditions that would not induce conidiation (Valenzuela-Perez & Smith, 1971). It was considered that the use of glutamate in these experiments to induce conidiation masked the high reductive biosynthetic needs of conidiation and it is probable that if a tricarboxylic acid cycle intermediate had been used to induce conidiation (Galbraith & Smith, 1969) there would have been a higher involvement of the PP pathway during conidiation of this fungus.…”

Section: Introductionmentioning

confidence: 99%

Changes in Carbon Catabolic Pathways during Synchronous Development of Conidiophores of Aspergillus niger

Smith

Anderson

1972

Journal of General Microbiology

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S U M M A R YCarbon catabolism was studied during the synchronous development of conidiophores of Aspergillus niger. The activities of key enzymes of the Embden-MeyerhofParnas (EMP) and pentose phosphate (PP) pathways were measured and studies of 14C0, production from [ 1-14C]-and [6-14C]glucose were made. The enzyme activities together with the radiorespirometric studies showed that both the EMP and PP pathways were present and operative at all stages of conidiophore development but that the relative activities of the pathways differed. The highest activity of the EMP pathway occurred during the initial period of vegetative growth before any signs of morphological change, High EMP activity and high 6-C/1-C ratios were obtained in a medium which did not support conidiophore initiation but allowed vegetative growth to occur. In contrast, high activity of the PP pathway and very low 6-C/ I-C ratios accompanied each stage of conidiophore development. The results suggest that the PP pathway predominates during conidiophore development of this fungus.

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Section: Introductionmentioning

confidence: 99%