Embryonic photosynthesis affects post-germination plant growth - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plant Physiology Année : 2020

Embryonic photosynthesis affects post-germination plant growth

Résumé

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 CPN60a2, which encodes a subunit of the chloroplast chaperonin complex CPN60. When exposed to cold temperatures, cpn60a2 mutants accumulate less chlorophyll in newly produced tissues, thus allowing the specific disturbance of embryonic photosynthesis. Analyses of cpn60a2 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.
Fichier principal
Vignette du fichier
Sela - PLant Physiol - 2020.pdf (2.4 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02526415 , version 1 (09-10-2020)

Licence

Paternité

Identifiants

Citer

Ayala Sela, Urszula Piskurewicz, Christian Megies, Laurent Mène-Saffrané, Giovanni Finazzi, et al.. Embryonic photosynthesis affects post-germination plant growth. Plant Physiology, 2020, 182 (4), pp.2166-2181. ⟨10.1104/pp.20.00043⟩. ⟨hal-02526415⟩
77 Consultations
43 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More