Embryonic photosynthesis affects post-germination plant growth
- Sela, Ayala Department of Botany and Plant Biology, University of Geneva, 1211 Geneva, Switzerland
- Piskurewicz, Urszula Department of Botany and Plant Biology, University of Geneva, 1211 Geneva, Switzerland
- Megies, Christian Department of Botany and Plant Biology, University of Geneva, 1211 Geneva, Switzerland
- Mène-Saffrané, Laurent Department of Biology, University of Fribourg, 1700 Fribourg, Switzerland
- Finazzi, Giovanni Université Grenoble Alpes, Centre National de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Énergies Alternatives, Institut National de la Recherche Agronomique, Interdisciplinary Research Institute of Grenoble - Cell & Plant Physiology Laboratory, 38000 Grenoble, France
- Lopez-Molina, Luis Department of Botany and Plant Biology, University of Geneva, 1211 Geneva, Switzerland - Institute of Genetics and Genomics in Geneva, University of Geneva, 1211 Geneva, Switzerland
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01.04.2020
Published in:
- Plant Physiology. - 2020, vol. 182, no. 4, p. 2166–2181
English
Photosynthesis is the fundamental process fueling plant vegetative growth and development. The progeny of plants relies on maternal photosynthesis, via food reserves in the seed, to supply the necessary energy for seed germination and early seedling establishment. Intriguingly, before seed maturation, Arabidopsis (Arabidopsis thaliana) embryos are also photosynthetically active, the biological significance of which remains poorly understood. Investigating this system is genetically challenging because mutations perturbing photosynthesis are expected to affect both embryonic and vegetative tissues. Here, we isolated a temperature-sensitive mutation affecting CPN60α2, which encodes a subunit of the chloroplast chaperonin complex CPN60. When exposed to cold temperatures, cpn60α2 mutants accumulate less chlorophyll in newly produced tissues, thus allowing the specific disturbance of embryonic photosynthesis. Analyses of cpn60α2 mutants were combined with independent genetic and pharmacological approaches to show that embryonic photosynthetic activity is necessary for normal skoto- and photomorphogenesis in juvenile seedlings as well as long-term adult plant development. Our results reveal the importance of embryonic photosynthetic activity for normal adult plant growth, development, and health.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
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- English
- Classification
- Biological sciences
- License
- License undefined
- Identifiers
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- RERO DOC 328406
- DOI 10.1104/pp.20.00043
- Persistent URL
- https://folia.unifr.ch/unifr/documents/308418
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