PHOTOSYSTEM-II INDEPENDENT CARBON-DIOXIDE FIXATION IN PLECTONEMA-BORYANUM DURING PHOTOAUTOTROPHIC GROWTH UNDER NITROGEN-FIXATION CONDITIONS

被引：10
|
作者：
MISRA, HS [1 ]
TULI, R [1 ]
机构：
[1] BHABHA ATOM RES CTR, DIV MOLEC BIOL & AGR, BOMBAY 400085, INDIA
来源：
JOURNAL OF PLANT BIOCHEMISTRY AND BIOTECHNOLOGY | 1993年 / 2卷 / 02期
关键词：
CYANOBACTERIA; NITROGEN FIXATION; PHOTOSYNTHESIS; DCMU RESISTANCE; ENDOGENOUS REDUCTANT;
D O I：
10.1007/BF03262934
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The non-heterocystous filamentous cyanobecterium Plectonema boryanum UTEX 594 grow rapidly mlcroaerobically under nitrogen-starvation conditions in continuous high light intensity by conducting oxygenic photosynthesis and oxygen sensitive nitrogen-fixation in alternating cycles. During diazotrophic phase, the light harvesting pigment phycocyanin declined with a concomitant depression in light dependent oxygen evolution by the cyanobacterium. A substantial component of light dependent carbon dioxide fixation during diazotrophic phase was not inhibited by DCMU in spite of complete cessation of photosynthetic oxygen evolution. Endogenous-reductant dependent electron transfer to photosystem I during diazotrophic phase is postulated even during photoautotrophic growth.
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页码：101 / 104
页数：4
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