Fluorescence induction characteristics of iron deficient cyanobacteria

Conference · Tue Apr 01 00:00:00 EST 1986 · Plant Physiol.; (United States)

OSTI ID:5382377

Henry, R; Guikema, J A

The fluorescence induction characteristics of Anacystis nidulans were examined after cultures were stressed with iron deficiency. When these cells were illuminated with 620 nm light to excite phycocyanin, a fluorescence induction transient was observed which was not present in normal cells. The transient had a rise time of approximately 3-4 sec, and was abolished when cells were preilluminated with 620 nm light. One goal of this work was to ascertain the role of electron transfer between PSII and either PSI or the respiratory system in causing the fluorescence transient. The effects of electron transport inhibitors and uncouplers on fluorescence induction were examined. Respiratory inhibitors, such as KCN, had little or no effect on the fluorescence transient. p-Chloromercuribenzoic acid, at concentrations below 0.5 mM, delayed the transient rise time without causing a decrease in the extent. Uncouplers, such as gramicidin and CCCP, caused a decrease in the extent of the transient.

• Research Organization: Kansas State Univ., Manhattan
• OSTI ID: 5382377
• Journal Information: Plant Physiol.; (United States), Vol. 80:4; Conference: Annual meeting of the American Society of Plant Physiologists, Baton Rouge, LA, USA, 8-12 Jun 1986
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
ANTIBIOTICS
RESPONSE MODIFYING FACTORS
CYANOBACTERIA
FLUORESCENCE
IRON
MERCURY COMPOUNDS
CHARGE TRANSPORT
NUTRITIONAL DEFICIENCY
PHOTOSYNTHETIC REACTION CENTERS
RESPIRATORY SYSTEM
ANTI-INFECTIVE AGENTS
DRUGS
ELEMENTS
LUMINESCENCE
METALS
MICROORGANISMS
TRANSITION ELEMENTS
560302* - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)
550700 - Microbiology