THE EFFECT OF CONTINUOUS LIGHT, LIGHT DURATION, DARK AND ULTRAVIOLET RADIATION ON GROWTH, HETEROCYST FREQUENCY AND PIGMENT COMPOSITION OF CYANOBACTERIUM NOSTOC SP

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KHAVARINEZHAD RAMEZAN ALI; FALAHIAN F.A.; SHOKRAVI S.

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Paper Information

Journal: JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY) Year:2001 | Volume:11 | Issue:40 Page(s): 2943-2956

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Title

THE EFFECT OF CONTINUOUS LIGHT, LIGHT DURATION, DARK AND ULTRAVIOLET RADIATION ON GROWTH, HETEROCYST FREQUENCY AND PIGMENT COMPOSITION OF CYANOBACTERIUM NOSTOC SP

Author(s)

KHAVARINEZHAD RAMEZAN ALI | FALAHIAN F.A. | SHOKRAVI S. | Issue Writer Certificate

Keywords

NOSTOCQ4

BLUE GREEN ALGAEQ4

CYANOBACJERIAQ4

GROWTH HETEROCYST FREQUENCYQ4

UGHT- PIGMENT COMPOSITIONQ3

Abstract

In this research, the ability of growth, changes in heterocyst frequencies, and pigmentation of NOSTOC sp. in response to low light energy (20,30,40,50 and 60 mmol quanta m-2s-1), light dark duration (12/12), and complete darkness (with galactose; sucrose or fructose) were studied. Results showed that, in 40 mmol quanta m-2s-1), a considerable lag phase in growth curve exists. Phycoerythrin was more efficient in light adaptation than phycocyanin light / dark durations caused a noticable decrease in heterocyst frequency. The ability of growth and heterocyst production completely blocked in dark in the presence of galactose and sucrose but in the presence of fructose this ability was slightly observed.Heterocyst frequency was reduced efficiently and significantly: even after 5-minute exposure of UV-C. The ability of recovery was not seen in this species. The content of phycoerythrin reduced considerably in relation to exposure time.

Cites

THE STUDY OF THE ECOPHYSIOLOGICAL EFFECTS OF SOIL CYANOBACTERIUM NOSTOC SP. AS SALINE SOIL CONDITIONER AND POTENTIAL OF GROWTH, VIABILITY AND AMMONIUM LIBERATION AT HIGH TEMPERATURE CONDITION

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APA: Copy

KHAVARINEZHAD, RAMEZAN ALI, FALAHIAN, F.A., & SHOKRAVI, S.. (2001). THE EFFECT OF CONTINUOUS LIGHT, LIGHT DURATION, DARK AND ULTRAVIOLET RADIATION ON GROWTH, HETEROCYST FREQUENCY AND PIGMENT COMPOSITION OF CYANOBACTERIUM NOSTOC SP. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 11(40), 2943-2956. SID. https://sid.ir/paper/70368/en

Vancouver: Copy

KHAVARINEZHAD RAMEZAN ALI, FALAHIAN F.A., SHOKRAVI S.. THE EFFECT OF CONTINUOUS LIGHT, LIGHT DURATION, DARK AND ULTRAVIOLET RADIATION ON GROWTH, HETEROCYST FREQUENCY AND PIGMENT COMPOSITION OF CYANOBACTERIUM NOSTOC SP. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2001;11(40):2943-2956. Available from: https://sid.ir/paper/70368/en

IEEE: Copy

RAMEZAN ALI KHAVARINEZHAD, F.A. FALAHIAN, and S. SHOKRAVI, “THE EFFECT OF CONTINUOUS LIGHT, LIGHT DURATION, DARK AND ULTRAVIOLET RADIATION ON GROWTH, HETEROCYST FREQUENCY AND PIGMENT COMPOSITION OF CYANOBACTERIUM NOSTOC SP,” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 11, no. 40, pp. 2943–2956, 2001, [Online]. Available: https://sid.ir/paper/70368/en

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