TY  - JOUR
AU  - Pribil
AU  - Sandoval-Ibanez
AU  - Labs
AU  - Sharma
AU  - Liu
AU  - Galgenmüller
AU  - Le, Trang
AU  - Wessels
AU  - Matsubara, Shizue
AU  - Jansson
AU  - Wanner
AU  - Leister
TI  - Fine-tuning of photosynthesis requires CURVATURE THYLAKOID1-mediated thylakoid plasticity
JO  - Plant physiology
VL  - 176
SN  - 0032-0889
CY  - Rockville, Md.
PB  - Soc.
M1  - FZJ-2018-01679
SP  - 2351-2364
PY  - 2018
AB  - The thylakoid membrane system of higher plant chloroplasts consists of interconnected subdomains of appressed and nonappressed membrane bilayers, known as grana and stroma lamellae, respectively. CURVATURE THYLAKOID1 (CURT1) protein complexes mediate the shape of grana stacks in a dosage-dependent manner and facilitate membrane curvature at the grana margins, the interface between grana and stroma lamellae. Although grana stacks are highly conserved among land plants, the functional relevance of grana stacking remains unclear. Here, we show that inhibiting CURT1-mediated alteration of thylakoid ultrastructure in Arabidopsis (Arabidopsis thaliana) reduces photosynthetic efficiency and plant fitness under adverse, controlled, and natural light conditions. Plants that lack CURT1 show less adjustment of grana diameter, which compromises regulatory mechanisms like the photosystem II repair cycle and state transitions. Interestingly, CURT1A suffices to induce thylakoid membrane curvature in planta and thylakoid hyperbending in plants overexpressing CURT1A. We suggest that CURT1 oligomerization is regulated at the posttranslational level in a light-dependent fashion and that CURT1-mediated thylakoid plasticity plays an important role in fine-tuning photosynthesis and plant fitness during challenging growth conditions.
LB  - PUB:(DE-HGF)16
C6  - pmid:29374108
UR  - <Go to ISI:>//WOS:000426848300037
DO  - DOI:10.1104/pp.17.00863
UR  - https://juser.fz-juelich.de/record/844238
ER  -