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Relationship between photosystem II activity and CO2 fixation in leaves
There is now potential to estimate photosystem II (PSII) activity in vivo from chlorophyll fluorescence measurements and thus gauge PSII activity per CO2 fixed. A measure of the quantum yield of… Expand
New Fluorescence Parameters for the Determination of QA Redox State and Excitation Energy Fluxes
- D. Kramer, G. Johnson, O. Kiirats, G. Edwards
- Chemistry, Medicine
- Photosynthesis Research
- 1 February 2004
A new parameter, qL, is introduced, based on a Stern–Volmer approach using a lake model, which estimates the fraction of open PS II centers and should be a useful parameter for terrestrial plants consistent with a high connectivity of PS II units, whereas some marine species with distinct antenna architecture may require the use of more complex parameters based on intermediate models of the photosynthetic unit. Expand
Dynamic flexibility in the light reactions of photosynthesis governed by both electron and proton transfer reactions.
It is argued that chloroplasts need two types of flexible mechanisms: one for modulating the output ratio of ATP:NADPH, which involves cyclic electron flux around photosystem I; and another for changing the regulatory sensitivity of the light-harvesting antenna to electron (and proton) flow. Expand
Can CO2 assimilation in maize leaves be predicted accurately from chlorophyll fluorescence analysis?
It is concluded that under a wide range of conditions fluorescence parameters can be used to predict accurately and rapidly CO2 assimilation rates in maize. Expand
Single-cell C(4) photosynthesis versus the dual-cell (Kranz) paradigm.
- G. Edwards, V. Franceschi, E. Voznesenskaya
- Biology, Medicine
- Annual review of plant biology
- 29 April 2004
The amazing diversity in C( 4) systems is discussed, how the essential features of C(4) are accomplished in single-cell versus Kranz-type C(2) plants, and speculates on why single- cell C(3) plants evolved. Expand
Diversification of the Old World Salsoleae s.l. (Chenopodiaceae): Molecular Phylogenetic Analysis of Nuclear and Chloroplast Data Sets and a Revised Classification
A first comprehensive phylogenetic analysis of tribe Salsoleae s.l. (Salsoloideae: Chenopodiaceae) is presented based on maximum parsimony and maximum likelihood analysis of nuclear ribosomal… Expand
5 – Biochemistry of C3–C4 Intermediates
If the biochemical and anatomical features of the Kranz syndrome are developed to varying degrees, then a variety of atypical physiological responses in photosynthesis and photorespiration may occur. Expand
The Biochemistry of C 4 Photosynthesis
C 4 photosynthesis consists of the coordinated function of two cell types in the leaves, usually designated mesophyll cells (MC) and bundle sheath cells (BSC), because enzymes of the C4 pathway are… Expand
Kranz anatomy is not essential for terrestrial C4 plant photosynthesis
- E. Voznesenskaya, V. Franceschi, O. Kiirats, H. Freitag, G. Edwards
- Biology, Medicine
- 29 November 2001
Evidence that C4 photosynthesis can function within a single photosynthetic cell in terrestrial plants is provided and it is shown that Borszczowia aralocaspica (Chenopodiaceae) has the photosynthesis features of C4 plants, yet lacks Kranz anatomy. Expand