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Open AccessFeature PaperArticle

Structural and Functional Heat Stress Responses of Chloroplasts of Arabidopsis thaliana

Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, 60438 Frankfurt am Main, Germany
Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, 1090 Vienna, Austria
Vienna Metabolomics Center (VIME), University of Vienna, 1090 Vienna, Austria
Frankfurt Institute of Advanced Studies (FIAS), D-60438 Frankfurt am Main, Germany
Author to whom correspondence should be addressed.
Current address: Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68588, USA.
Current address: Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, 91198 Gif-sur-Yvette, France.
Genes 2020, 11(6), 650;
Received: 18 May 2020 / Revised: 4 June 2020 / Accepted: 8 June 2020 / Published: 12 June 2020
(This article belongs to the Special Issue Heat Stress Response in Plants)
Temperature elevations constitute a major threat to plant performance. In recent years, much was learned about the general molecular mode of heat stress reaction of plants. The current research focuses on the integration of the knowledge into more global networks, including the reactions of cellular compartments. For instance, chloroplast function is central for plant growth and survival, and the performance of chloroplasts is tightly linked to the general status of the cell and vice versa. We examined the changes in photosynthesis, chloroplast morphology and proteomic composition posed in Arabidopsis thaliana chloroplasts after a single or repetitive heat stress treatment over a period of two weeks. We observed that the acclimation is potent in the case of repetitive application of heat stress, while a single stress results in lasting alterations. Moreover, the physiological capacity and its adjustment are dependent on the efficiency of the protein translocation process as judged from the analysis of mutants of the two receptor units of the chloroplast translocon, TOC64, and TOC33. In response to repetitive heat stress, plants without TOC33 accumulate Hsp70 proteins and plants without TOC64 have a higher content of proteins involved in thylakoid structure determination when compared to wild-type plants. View Full-Text
Keywords: chloroplasts; proteome; heat stress; translocon; ppi1; toc64; quantitative proteomics chloroplasts; proteome; heat stress; translocon; ppi1; toc64; quantitative proteomics
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Paul, P.; Mesihovic, A.; Chaturvedi, P.; Ghatak, A.; Weckwerth, W.; Böhmer, M.; Schleiff, E. Structural and Functional Heat Stress Responses of Chloroplasts of Arabidopsis thaliana. Genes 2020, 11, 650.

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