chlorophyll a


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Related to chlorophyll a: chlorophyll b, chlorophyll c

chlorophyll a

[′klȯr·ə‚fil ′ā]
(biochemistry)
C55H72O5N4Mg A magnesium chelate of dihydroporphyrin that is esterified with phytol and has a cyclopentanone ring; occurs in all higher plants and algae.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Based on the above, chlorophyll a can form complexes via magnesium atom (nucleus) with oxygen atoms of various compounds.
Chlorophyll content and chlorophyll a fluorescence: Photosynthesis is sensitive to the environmental changes; it is necessary to maintain the balance between light absorbed and energy consumed by ATP (Brestic et al.
For the cultivar 'FHIA-18', there was high and significant correlation at 0.05 probability level only between Mg contents and chlorophyll b (0.90), direct correlation, and between Ca and chlorophyll a (-0.95), inverse correlation.
The oxygen evolving complex, sitting on the lumen side, donates one electron to the chlorophyll a molecule that had donated its excited electron to pheophytin.
Both, concentration of chlorophyll a and chlorophyll b were increased in partially coloured bracts.
In experiments in the lab, Pierce used a radioactive tracer to show that the slugs were making the pigment, called chlorophyll a, themselves and not simply relying on chlorophyll reserves stolen from the algae.
The sediment samples were analyzed for chlorophyll a [a proxy for microalgal biomass (3, 5)] using the spectrophotometric method.
The absorbance values (A663, A646 and A470) of the extracted solution were measured using UV-visible spectrophotometer at the wavelength of 663nm, 646nm and 470nm, the concentration (mg L-1) of chlorophyll a (Chl a), chlorophyll b (Chl b) and carotenoid (Cx.c) of the extracted solution and the corresponding contents of each kinds of pigment (mg g-1) were calculated according to the equation of Li (2000).
Gas exchange and chlorophyll a fluorescence were investigated to survey the diurnal changes in photosynthesis of ginkgo (Ginkgo biloba L.) leaves.
This crop suffering water stress resulted in decreased seed yield, chlorophyll a, chlorophyll b, chlorophyll concentration, and yield per hectare and stomatal Conductance.