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Title Transcription
キスイコ コウゴウセイ サイキン RHODOBACTER SPHAEROIDES ノ チッソ タイシャ ト タンソ タイシャ ニ オヨボス ショウサン コキュウ ノ エイキョウ
Title Alternative
Effects of Nitrate Respiration on Nirogen and Carbon Metabolisms in Photosynthetic Bacterium, Rhodobacter sphaeroides Isolated from Brackish Water
File
language
jpn
Author
Sakai, Takeharu
Takinami, Koichi
Description
A denitrifying strain of phototrophic purple nonsulfur bacterium, Rhodobacter sphaeroides NII2, which was isolated from, Lake Nakaumi, was characterized for nitrogen and carbon metabolisms. This strain grew well utilizing (NH_4)_2HP0_4 as introgen source, but was incapable of ultilizing KN0_3 as nitrogen source under anaerobic condition. On the other hand KN0_3 was reduced to N_2 through several intermediary metabolites under both light and dark culture conditions. The denitrification activities of dark-grown cells were 1.5-fold higher than those of light-grown cells, indicating that the denitrification of the strain NII2 might be repressed by light irradiation. In addition, light-grown cells produced large amounts of alanin derived from pyruvate, the final product of glycolytic pathway. The amounts of alanin decreased with increasing of KN0_3 added. In contrast, dark-grown cells produced large amounts of glutamate derived from 2-oxo-glutarate, an intermediate of TCA cycle. These results indicate that light irradiation and nitrate respiration have a close relation to nitrogen and carbon metabolisms in the bacterium.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
29
Start Page
31
End Page
36
ISSN
0370940X
Published Date
1995-12-20
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Shimane University
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