Photosynthetic utilisation of inorganic carbon and its regulation in the marine diatom Skeletonema costatum

Functional Plant Biology : FPB
Xiongwen Chen, Kunshan Gao

Abstract

Photosynthetic uptake of inorganic carbon and regulation of photosynthetic CO2 affinity were investigated in Skeletonema costatum (Grev.) Cleve. The pH independence of K1/2(CO2) values indicated that algae grown at either ambient (12 μmol L-1) or low (3 μmol L-1) CO2 predominantly took up CO2 from the medium. The lower pH compensation point (9.12) and insensitivity of photosynthetic rate to di-isothiocyanatostilbene disulfonic acid (DIDS) indicated that the alga had poor capacity for direct HCO3- utilisation. Photosynthetic CO2 affinity is regulated by the concentration of CO2 rather than HCO3-, CO32- or total dissolved inorganic carbon (DIC) in the medium. The response of photosynthetic CO2 affinity to changes in CO2 concentration was most sensitive within the range 3-48 μmol L-1 CO2. Light was required for the induction of photosynthetic CO2 affinity, but not for its repression, when cells were shifted between high (126 μmol L-1) and ambient (12 μmol L-1) CO2. The time needed for cells grown at high CO2 (126 μmol L-1) to fully develop photosynthetic CO2 affinity at ambient CO2 was approximately 2 h, but acclimation to low or very low CO2 levels (3 and 1.3 μmol L-1, respectively) took more than 10 h. Cells grown at low CO2 (3 ...Continue Reading

References

Dec 31, 1997·Nature·C E Boklage
Apr 5, 2001·Proceedings of the National Academy of Sciences of the United States of America·H FukuzawaK Ohyama
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Aaron Kaplan, Leonora Reinhold
Apr 1, 1989·Plant Physiology·D F SültemeyerD T Canvin
Dec 1, 1992·Oecologia·A M JohnstonJ A Raven
Apr 1, 2002·Functional Plant Biology : FPB·Murray R BadgerG Dean Price
Apr 1, 2002·Functional Plant Biology : FPB·Brian ColmanJeffrey S Dason
Apr 1, 2002·Functional Plant Biology : FPB·François M M MorelPhilippe D Tortell
Apr 1, 2002·Functional Plant Biology : FPB·John Beardall, Mario Giordano

❮ Previous
Next ❯

Citations

Feb 19, 2011·Annual Review of Marine Science·John R Reinfelder
Apr 1, 2014·Functional Plant Biology : FPB·Kunshan Gao, Douglas A Campbell
Dec 19, 2008·Science in China. Series C, Life Sciences·HongYan WuKunShan Gao

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.