Starved Pseudomonas syringae cells release strong Cu2+-complexing compounds

• Type: Article in International Scientific Journal
• Date: 1992

Authors

cabral, jps (Author) FCUP

Journal

Title: Chemical Speciation and Bioavailability

Vol. 4

Pages: 105-107

ISSN: 0954-2299

Publisher: Taylor & Francis

Indexing

Scopus - 4 Citations

Other information

Authenticus ID: P-00Q-ACE

DOI: 10.1080/09542299.1992.11083187

Abstract (EN): Pseudomonas syringae cells suspended in Na+-piperazinediethanesulphonate (PIPES) buffer at 24.5°C released UV-absorbing materials, free and purine-bound ribose and inorganic phosphate. When the filtrates of the suspensions were titrated with Cu2+, a significant fraction of added copper was not free in solution. An increase in the starvation period resulted in an increase in the amount of released UV-absorbing materials, free and purine-bound ribose and inorganic phosphate, and an increase in the Cu2+-binding capacity of the filtrates. The results indicate that starved P. syringae cells released strong Cu2+-binding substances, which were partially products of endogenous metabolism, and suggest that inorganic phosphate contributed significantly to the Cu2+-binding capacity of the filtrates. © 1992 Taylor and Francis Group, LLC.

Language: English

Type (Professor's evaluation): Scientific