Chilling-induced reduction of photosynthesis is mitigated by exposure to elevated CO2 concentrations

Title:

Chilling-induced reduction of photosynthesis is mitigated by exposure to elevated CO2 concentrations

Creator:

Arena, C. and Vitale, L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f19c52b7-468a-4e65-953a-e0f3c556c9a9
uuid:f19c52b7-468a-4e65-953a-e0f3c556c9a9
issn:0300-3604
doi:10.1007/s11099-018-0843-3

Subject:

fotosyntéza, photosynthesis, chilling, elevated CO2, partitioning of absorbed light to PSII, photosynthetic rate, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants. Photosynthetic rate was measured at 21% and 2% O2 after a short-term exposure of 5 h at four different treatments: 360 μmol(CO2) mol-1/25°C (AC); 360 μmol(CO2) mol-1/4°C (AC+LT); 700 μmol(CO2) mol-1/25°C (EC); 700 μmol(CO2) mol-1/4°C (EC+LT). Compared to AC+LT, EC+LT plants showed higher values of CO2 fixation, photochemical activity, and Rubisco amount. These latter invest a higher portion of photosynthetic electron flow to O2, differently from AC+LT plants that promote the regulated thermal dissipation processes. In EC+LT plants, the photosynthetic electron flow to O2 acts as a safety mechanism against the excess of absorbed light, upon return to prechilling conditions, allowing photosynthetic apparatus to maintain its efficiency. In AC+LT plants, the increase of thermal dissipation processes was not adequate to guarantee the PSII photoprotection and the photosynthetic recovery after chilling., C. Arena, L. Vitale., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

1259-1267

Source:

Photosynthetica | 2018 Volume:56 | Number:4

Harvested from:

CDK

Metadata only:

false