NDLI: Differential Control of Xanthophylls and Light-Induced Stress Proteins, as Opposed to Light-Harvesting Chlorophyll a/b Proteins, during Photosynthetic Acclimation of Barley Leaves to Light Irradiance

Content Provider	PubMed Central
Author	Montané, Marie-hélène Tardy, Florence Klaus, Kloppstech Michel, Havaux
Copyright Year	1998
Abstract	Barley (Hordeum vulgare L.) plants were grown at different photon flux densities ranging from 100 to 1800 μmol m−2 s−1 in air and/or in atmospheres with reduced levels of O2 and CO2. Low O2 and CO2 partial pressures allowed plants to grow under high photosystem II (PSII) excitation pressure, estimated in vivo by chlorophyll fluorescence measurements, at moderate photon flux densities. The xanthophyll-cycle pigments, the early light-inducible proteins, and their mRNA accumulated with increasing PSII excitation pressure irrespective of the way high excitation pressure was obtained (high-light irradiance or decreased CO2 and O2 availability). These findings indicate that the reduction state of electron transport chain components could be involved in light sensing for the regulation of nuclear-encoded chloroplast gene expression. In contrast, no correlation was found between the reduction state of PSII and various indicators of the PSII light-harvesting system, such as the chlorophyll a-to-b ratio, the abundance of the major pigment-protein complex of PSII (LHCII), the mRNA level of LHCII, the light-saturation curve of O2 evolution, and the induced chlorophyll-fluorescence rise. We conclude that the chlorophyll antenna size of PSII is not governed by the redox state of PSII in higher plants and, consequently, regulation of early light-inducible protein synthesis is different from that of LHCII.
Starting Page	227
File Format	PDF
ISSN	15322548
e-ISSN	15322548
Journal	Plant Physiology
Issue Number	1
Volume Number	118
Language	English
Publisher	American Society of Plant Physiologists
Publisher Date	1998-09-01
Access Restriction	Open
Rights Holder	American Society of Plant Physiologists
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics Physiology Plant Science

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Editorial: Regulation of Light-Harvesting Systems During Acclimation of Photosynthetic Organisms

Chlorophyll a/b-binding proteins, pigment conversions, and early light-induced proteins in a chlorophyll b-less barley mutant.

Thermostability and Photostability of Photosystem II in Leaves of the Chlorina-f2 Barley Mutant Deficient in Light-Harvesting Chlorophyll a/b Protein Complexes.

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Hierarchical Response of Light Harvesting Chlorophyll-Proteins in a Light-Sensitive Chlorophyll b-Deficient Mutant of Maize 1

Differential Control of Xanthophylls and Light-Induced Stress Proteins, as Opposed to Light-Harvesting Chlorophyll a/b Proteins, during Photosynthetic Acclimation of Barley Leaves to Light Irradiance

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Editorial: Regulation of Light-Harvesting Systems During Acclimation of Photosynthetic Organisms

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