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3 results on '"acclimatation photosynthétique"'

1. Soil salinity alters the sexual responses to elevated CO2 and temperature in growth and leaf traits of a dioecious plant.

Author

Ling Li, Baoli Duan, Dongzhou Deng, Weiguo Tu, and Yuanbin Zhang

Subjects
*DIOECIOUS plants, *SOIL salinity, *EFFECT of salt on plants, *EFFECT of carbon dioxide on plants, *EFFECT of temperature on plants, *POPLARS
Abstract

This study elucidated whether the adverse effect of soil salinity is different between Populus yunnanensis Dode males and females under climate change. We hypothesized that the magnitude and direction of sexual responses to elevated CO2 and warming will be modified by soil salinity in dioecious plants. Populus yunnanensis was employed as a model species to study sexual responses in growth, photosynthesis, carbohydrate accumulation, and C and N allocation to elevated CO2 and temperature under soil salinity. Cuttings were divided into control and salt groups and were exposed to two CO2 regimes (ambient CO2 and double ambient CO2) and two temperature regimes (ambient temperature and ambient temperature + 2.2 °C) in growth chambers. Males exhibited a greater down-regulation of the net photosynthesis rate (Anet) than did females at elevated CO2, primarily due to their poorer carbon sink-source balance and lower N availability. In the salt group, unlike in the control group, warming showed a positive effect on the growth of both females and males, and elevated CO2 and temperature had a positive synergistic effect on the growth of both sexes. Sexual growth differences under soil salinity were reduced by elevated CO2, temperature, and a combination of both. These results provide evidence for sexually different responses to environmental changes in dioecious plants and support the idea that sex ratios will shift under climate change. [ABSTRACT FROM AUTHOR]

Published
2014
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2. A systems-wide understanding of photosynthetic acclimation in algae and higher plants

Author

Roberto Bassi, Ioannis Dikaios, Brieuc Urbain, Michel Goldschmidt-Clermont, Oliver Ebenhöh, Anna Matuszyńska, Stephanie Spelberg, Julie Maguire, Kailash Adhikari, Adeline Le Monnier, Dipali Singh, Stefano Magni, Giulio Rocco Stella, Lucilla Taddei, Federica Cariti, Claudia Zabke, Fiona Wanjiku Moejes, Antonella Succurro, Kathrin Müller, Giovanni Finazzi, Mark G. Poolman, Valeria Villanova, Serena Flori, Guillaume Cogne, Angela Falciatore, Cluster of Excellence on Plant Sciences (CEPLAS), Institute of Quantitative and Theoretical Biology, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Bantry Marine Research Station, Department of Biological and Medical Sciences, Oxford Brookes University, Department of Biotechnology, University of Tehran-University College of Science, Department of Botany and Plant Biology, University of Geneva, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut Universitaire de Technologie Saint-Nazaire (IUT Saint-Nazaire), Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Universitaire de Technologie - La Roche-sur-Yon (IUT La Roche-sur-Yon), Université de Nantes (UN), Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Vétérinaire Agroalimentaire et de l'Alimentation Nantes Atlantique (ONIRIS), PRES Université Nantes Angers Le Mans (UNAM), Biologie Computationnelle et Quantitative = Laboratory of Computational and Quantitative Biology (LCQB), Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC), Sorbonne Université (SU), UMR 1417 PCV Laboratoire de Physiologie Cellulaire Végétale., Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut National de la Recherche Agronomique (INRA), Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Fermentalg SA, IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT), University of Aberdeen, Marie Curie Initial Training Network project, AccliPhot [PITN-GA-2012-316427], Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN)-Institut Universitaire de Technologie Saint-Nazaire (IUT Saint-Nazaire), Université de Nantes (UN)-Institut Universitaire de Technologie - La Roche-sur-Yon (IUT La Roche-sur-Yon), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Université Bretagne Loire (UBL), Heinrich-Heine-Universität Düsseldorf [Düsseldorf], Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Université Grenoble Alpes (UGA), Ecole Nationale Supérieure des Mines de Nantes (Mines Nantes), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), IMT Atlantique (IMT Atlantique), Moejes F.W., Matuszynska A., Adhikari K., Bassi R., Cariti F., Cogne G., Dikaios I., Falciatore A., Finazzi G., Flori S., Goldschmidt-Clermont M., Magni S., Maguire J., Le Monnier A., Muller K., Poolman M., Singh D., Spelberg S., Stella G.R., Succurro A., Taddei L., Urbain B., Villanova V., Zabke C., and Ebenhoh O.

Subjects
0301 basic medicine, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Physiology, Acclimatization, Context (language use), PhD training, interdisciplinary training, Plant Science, Biochemistry, biophysics & molecular biology [F05] [Life sciences], Biology, acclimation, Photosynthesis, Models, Biological, modelling, 03 medical and health sciences, Algae, Chlorophyta, application industrielle, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, mathematical modelling, Biochimie, biophysique & biologie moléculaire [F05] [Sciences du vivant], biodiversity, modélisation, micro-algue, Phototroph, photosynthetic system, Ecology, Non-photochemical quenching, Systems Biology, acclimatation photosynthétique, photosynthetic optimisation, Plankton, Plants, analyse rétrospective, biology.organism_classification, industrial application, European Training Network, 030104 developmental biology, Acclimation, microalgal cultivation, non-photochemical quenching, Photosynthetic acclimation, adaptation à la lumière, appareil photosynthétique, Biochemical engineering
Abstract

The ability of phototrophs to colonise different environments relies on robust protection against oxidative stress, a critical requirement for the successful evolutionary transition from water to land. Photosynthetic organisms have developed numerous strategies to adapt their photosynthetic apparatus to changing light conditions in order to optimise their photosynthetic yield, which is crucial for life on Earth to exist. Photosynthetic acclimation is an excellent example of the complexity of biological systems, where highly diverse processes, ranging from electron excitation over protein protonation to enzymatic processes coupling ion gradients with biosynthetic activity, interact on drastically different timescales from picoseconds to hours. Efficient functioning of the photosynthetic apparatus and its protection is paramount for efficient downstream processes, including metabolism and growth. Modern experimental techniques can be successfully integrated with theoretical and mathematical models to promote our understanding of underlying mechanisms and principles. This review aims to provide a retrospective analysis of multidisciplinary photosynthetic acclimation research carried out by members of the Marie Curie Initial Training Project, AccliPhot, placing the results in a wider context. The review also highlights the applicability of photosynthetic organisms for industry, particularly with regards to the cultivation of microalgae. It intends to demonstrate how theoretical concepts can successfully complement experimental studies broadening our knowledge of common principles in acclimation processes in photosynthetic organisms, as well as in the field of applied microalgal biotechnology.

Published
2017
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3. Photosynthetic acclimation of beech seedlings to full sunlight following a major windstorm event in France

Author

Phillip E. Reynolds and Henri Frochot

Subjects
0106 biological sciences, arbre forestier, gas exchange, fagus sylvatica, 010603 evolutionary biology, 01 natural sciences, perturbation naturelle, feuillu, photosynthetic acclimation, [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, photosynthèse, Beech, 2. Zero hunger, échanges gazeux, lumière, potentiel hydrique des plants, plant forestier, Ecology, biology, acclimatation photosynthétique, natural disturbance, ombrage, Forestry, tempête, 15. Life on land, biology.organism_classification, échange gazeux, Photosynthetic acclimation, potentiel hydrique, plant water potential---hêtre, beech, HETRE COMMUN, COUVERTURE VEGETALE, utilisation de l'eau, 010606 plant biology & botany
Abstract

L'effet d'une perturbation naturelle (suppression du couvert forestier) sur l'acclimatation photosynthétique de jeunes hêtres (Fagus sylvatica L.) a été étudié dans le Nord-Est de la France après la tempête exceptionnelle de décembre 1999. Les modalités comportaient des plants ombragés (poussant sous couvert), ensoleillés (poussant en pleine lumière) et découverts (poussant sous couvert puis en pleine lumière après tempête). En 2000, les hêtres découverts et ensoleillés étaient caractérisés par des valeurs similaires de photosynthèse, transpiration, conductance du mésophille, et efficience de l'utilisation de l'eau, qui étaient en général deux fois plus fortes que celles des hêtres ombragés. En outre, les courbes de saturation photosynthétique ne différaient pas entre plants découverts et ensoleillés, mais différaient des plants ombragés. Cependant, les valeurs de conductance stomatique des hêtres ombragés et découverts ne différaient pas entre elles, et étaient plus basses que celles des hêtres ensoleillés. L'acclimatation continuait en 2001, mais restait incomplète, comme le montrent les valeurs similaires d'efficience de l'utilisation de l'eau intrinsèque pour les hêtres découverts et ombragés, qui étaient plus basses que les valeurs moyennes pour les hêtres ensoleillés. Le potentiel hydrique des plants restait le plus élevé pour les hêtres ombragés au cours des deux années. Ces résultats suggèrent que la pleine acclimatation est un processus graduel, se déroulant sur des saisons de croissance successives. Nous supposons qu'elle pourrait être directement reliée à une augmentation ultérieure de la biomasse racinaire des semis mis à découvert, The effect of natural disturbance (windthrow of mature forests) on photosynthetic acclimation of shade-grown beech (Fagus sylvatica L.) seedlings seas studied at a northeastern France location near Nancy in the Lorraine Region after a major windstorm event in December 1999. Treatments consisted of shaded and full sun plots prior to the storm, and plots where beech seedlings were released from shading by the storm. In 2000. beech in released and full sun plots were characterized by similar photosynthesis, transpiration, mesophyll conductance, and water use efficiencies, which were generally 2-fold higher than those for beech in shaded plots. Additionally, photosynthetic saturation curves did not differ for released and full sun treatments, but did differ from the shade treatment. However, stomatal conductance values for shaded and released beech did not differ, and were lower than those for full sunlight seedlings. Acclimation continued in 2001, but remained incomplete, as evidenced by similar intrinsic water use efficiency values for released and shade treatments, which were lower than the mean value for the full sun treatment. Plant water potential remained highest for shaded seedlings in both years. These findings suggest that full acclimation is a gradual process, occurring over successive growing seasons. We speculate that full acclimation may be directly related to future development of greater root biomass in released seedlings.

Published
2003
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