Changes in photosynthetic properties measured by oxygen evolution and variable chlorophyll fluorescence in a simulated entrainment experiment with the cyanobacterium Planktothrix rubescens

2001 ◽  
Vol 63 (3) ◽  
pp. 363-382 ◽  
Author(s):  
Jacco C. Kromkamp ◽  
André Domin ◽  
Zvy Dubinsky ◽  
Claudia Lehmann ◽  
Ferdinand Schanz
Keyword(s):  
Chlorophyll Fluorescence ◽  
Oxygen Evolution ◽  
Planktothrix Rubescens ◽  
Variable Chlorophyll Fluorescence ◽  
Photosynthetic Properties

Photoelectron transport ability of chloroplast thylakoid membranes treated with NO donor SNP: Changes in flash oxygen evolution and chlorophyll fluorescence

Nitric Oxide ◽  
2011 ◽  
Vol 24 (2) ◽  
pp. 84-90 ◽  
Author(s):  
Radka Vladkova ◽  
Anelia G. Dobrikova ◽  
Ranjeet Singh ◽  
Amarendra N. Misra ◽  
Emilia Apostolova
Keyword(s):  
Chlorophyll Fluorescence ◽  
Oxygen Evolution ◽  
Thylakoid Membranes ◽  
No Donor

scholarly journals Photosynthetic properties of elite erect leaf maize inbred lines and their contribution to seed production improvement

2004 ◽  
pp. 45-56 ◽  
Author(s):  
Cedomir Radenovic ◽  
Zdravko Hojka ◽  
Dragojlo Selakovic ◽  
Miroljub Misovic ◽  
Milovan Pavlov ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Seed Production ◽  
Plant Density ◽  
Inbred Lines ◽  
Thermal Processes ◽  
Critical Temperatures ◽  
Maize Inbred Lines ◽  
Production Improvement ◽  
Photosynthetic Properties ◽  
Erect Leaf

A hypothesis that elite erect leaf maize inbred lines are characterized by properties of an efficient photo-model and that as such are very desirable in increasing the number of plants per unit area (plant density) in the process of seed production has been confirmed in the present study. The properties of the observed elite erect leaf maize inbred lines were based on the effects and characteristics of thermal processes of delayed chlorophyll fluorescence occurring in their thylakoid membranes. The temperature dependence of the delayed chlorophyll fluorescence intensity, the Arrhenius plot for the determination of phase transitions (critical temperatures) and activation energy are the principal parameters of the thermal processes. Based on the obtained results on photosynthetic properties it was also possible to estimate the tolerance and adaptation of elite erect leaf maize inbred lines to high temperatures and drought.

A possible relation between the function of photosystem II in oxygen evolution and the variable chlorophyll fluorescence

1989 ◽  
Vol 238 (1291) ◽  
pp. 127-136
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Reaction Centre ◽  
Redox Potentials ◽  
Donor Side ◽  
Hypothetical Model ◽  
Surplus Energy ◽  
Variable Chlorophyll Fluorescence ◽  
And Function ◽  
Energy Dependent

A hypothetical model for the structure and function of photosystem II is proposed that attempts to incorporate different phenomena related to the variable chlorophyll fluorescence inherent in this photosystem. The involvement of pheophytin redox chemistry on both the acceptor and donor side of photosystem II is postulated to achieve redox potentials high enough to oxidize water. The presence of this symmetry would be the cause of inefficient photochemistry in photosystem II when, under unbalanced carbon metabolism, a surplus charge remains on the reaction centre. In addition, such a scheme would enable an efficient dissipation of surplus energy in the reaction centre itself, and would be the origin ofthe ‘energy-dependent’ quenching of chlorophyll fluorescence, q ( E ).

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