Daily temperature drop prevents inhibition of photosynthesis in tomato plants under continuous light

Title:

Daily temperature drop prevents inhibition of photosynthesis in tomato plants under continuous light

Creator:

Ikkonen, E. N., Shibaeva, T. G., Rosenqvist, E., and Ottosen, C.-O.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:516f915a-42f0-47ea-8c47-5ad9b10060ad
uuid:516f915a-42f0-47ea-8c47-5ad9b10060ad
issn:0300-3604
doi:10.1007/s11099-015-0115-4

Subject:

fotosyntéza, photosynthesis, chlorophyll fluorescence, gas exchange, leaf area, photodamage, stomatal conductance, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

The negative effects of continuous light (CL) seen in tomato plants are often claimed to be linked to effects of offsetting the diurnal rhythm. In this study we tested whether a short-term daily temperature drop prevents the decreased photosynthetic performance seen in tomato plants grown under CL. Tomato (Lycopersicon esculentum Mill.) plantlets were grown at constant temperature of 26°C under 16-h day (16D) or 24-h day (24D) at 150 μmol m-2 s-1 PPFD. Some 24D plants were treated daily by 2 h temperature drop from 26 to 10°C (24D+DROP). Physiological disorder, such as severe leaf chlorosis, a large decrease in net photosynthetic rate, maximal quantum yield of PSII photochemistry, and the effective quantum yield of PSII photochemistry were observed in 24D, but not in 16D and 24D+DROP plants. The daily 2-h drop in temperature eliminated a negative effect of CL on photosynthesis and prevented the development of leaf chlorosis in tomato plants. This could be due to a change in carbohydrate metabolism as the short drop in temperature might allow maintenance of the diurnal rhythms., E. N. Ikkonen, T. G. Shibaeva, E. Rosenqvist, C.-O. Ottosen., and Obsahuje seznam literatury

Language:

Multiple languages

Rights:

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

Coverage:

389-394

Source:

Photosynthetica | 2015 Volume:53 | Number:3

Harvested from:

CDK

Metadata only:

false