caa a22 4500 445889543 CHVBK 20180317145611.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s11120-011-9623-7 doi (NATIONALLICENCE)springer-10.1007/s11120-011-9623-7 Recent progresses on the genetic basis of the regulation of CO2 acquisition systems in response to CO2 concentration [Elektronische Daten] [Yusuke Matsuda, Kensuke Nakajima, Masaaki Tachibana] Marine diatoms, the major primary producer in ocean environment, are known to take up both CO2 and HCO3 − in seawater and efficiently concentrate them intracellularly, which enable diatom cells to perform high-affinity photosynthesis under limiting CO2. However, mechanisms so far proposed for the inorganic carbon acquisition in marine diatoms are significantly diverse despite that physiological studies on this aspect have been done with only limited number of species. There are two major hypotheses about this; that is, they take up and concentrate both CO2 and HCO3 − as inorganic forms, and efficiently supply CO2 to Rubisco by an aid of carbonic anhydrases (biophysical CO2-concentrating mechanism: CCM); and as the other hypothesis, biochemical conversion of HCO3 − into C4 compounds may play a major role to supply concentrated CO2 to Rubisco. At moment however, physiological evidence for these hypotheses were not related well to molecular level evidence. In this study, recent progresses in molecular studies on diatom-carbon-metabolism genes were related to the physiological aspects of carbon acquisition. Furthermore, we discussed the mechanisms regulating CO2 acquisition systems in response to changes in pCO2. Recent findings about the participation of cAMP in the signaling pathway of CO2 concentration strongly suggested the occurrences of mammalian-type-signaling pathways in diatoms to respond to changes in pCO2. In fact, there were considerable numbers of putative adenylyl cyclases, which may take part in the processes of CO2 signal capturing. Springer Science+Business Media B.V., 2011 Marine diatoms nationallicence CO2 nationallicence HCO3 − transport nationallicence Carbonic anhydrase nationallicence Localization nationallicence cAMP nationallicence Matsuda Yusuke Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut Nakajima Kensuke Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut Tachibana Masaaki Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut Photosynthesis Research Springer Netherlands 109/1-3(2011-09-01), 191-203 0166-8595 109:1-3<191 2011 109 11120 https://doi.org/10.1007/s11120-011-9623-7 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11120-011-9623-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matsuda Yusuke Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut NATIONALLICENCE 700 1- Nakajima Kensuke Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut NATIONALLICENCE 700 1- Tachibana Masaaki Department of Bioscience, Research Center for Environmental Bioscience, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan aut NATIONALLICENCE 773 0- Photosynthesis Research Springer Netherlands 109/1-3(2011-09-01), 191-203 0166-8595 109:1-3<191 2011 109 11120 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer