Photoprotection and optimization of sucrose usage contribute to faster recovery of photosynthesis after water deficit at high temperatures in wheat

0544877 - ÚVGZ 2022 RIV DK eng J - Článek v odborném periodiku
Correia, P. M. P. - da Silva, A.B. - Roitsch, Thomas - Carmo-Silva, E. - Marques da Silva, J.
Photoprotection and optimization of sucrose usage contribute to faster recovery of photosynthesis after water deficit at high temperatures in wheat.
Physiologia Plantarum. Roč. 172, č. 2 (2021), s. 615-628. ISSN 0031-9317. E-ISSN 1399-3054
Grant CEP: GA MŠMT(CZ) LO1415
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: light-harvesting complex * photosystem-ii * carbohydrate-metabolism * heat-stress * vacuolar invertase * plant invertases * intact leaves * rubisco * drought * aggregation
Obor OECD: Plant sciences, botany
Impakt faktor: 5.081, rok: 2021
Způsob publikování: Open access
https://onlinelibrary.wiley.com/doi/10.1111/ppl.13227

Plants are increasingly exposed to events of elevated temperature and water deficit, which threaten crop productivity. Understanding the ability to rapidly recover from abiotic stress, restoring carbon assimilation and biomass production, is important to unravel crop climate resilience. This study compared the photosynthetic performance of two Triticum aestivum L. cultivars, Sokoll and Paragon, adapted to the climate of Mexico and UK, respectively, exposed to 1-week water deficit and high temperatures, in isolation or combination. Measurements included photosynthetic assimilation rate, stomatal conductance, in vitro activities of Rubisco (EC 4.1.1.39) and invertase (INV, EC 3.2.1.26), antioxidant capacity and chlorophyll a fluorescence. In both genotypes, under elevated temperatures and water deficit (WD38 degrees C), the photosynthetic limitations were mainly due to stomatal restrictions and to a decrease in the electron transport rate. Chlorophyll a fluorescence parameters clearly indicate differences between the two genotypes in the photoprotection when subjected to WD38 degrees C and showed faster recovery of Paragon after stress relief. The activity of the cytosolic invertase (CytINV) under these stress conditions was strongly related to the fast photosynthesis recovery of Paragon. Taken together, the results suggest that optimal sucrose export/utilization and increased photoprotection of the electron transport machinery are important components to limit yield fluctuations due to water shortage and elevated temperatures.
Trvalý link: http://hdl.handle.net/11104/0321673