The influence of antimycin A on pigment composition and functional activity of photosynthetic apparatus in Triticum aestivum L. under high temperature

Title:

The influence of antimycin A on pigment composition and functional activity of photosynthetic apparatus in Triticum aestivum L. under high temperature

Creator:

Batjuka, A., Škute, N., and Petjukevičs, A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:21421618-af8b-4200-a564-3c7f6eb68652
uuid:21421618-af8b-4200-a564-3c7f6eb68652
issn:0300-3604
doi:10.1007/s11099-016-0231-9

Subject:

alternativní cesta dýchání, chlorofyl a fluorescence, obsah pigmentu, pšenice setá, alternative respiratory pathway, chlorophyll a fluorescence, pigment content, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

The purpose of the current investigation was to evaluate the influence of antimycin A (AA) as an activator of the alternative respiratory pathway (AP) on photosynthetic pigment composition and functional activity of the photosynthetic apparatus of wheat seedlings (Triticum aestivum L.) under exposure to high temperature as well as their acclimation. Our results indicated that a significant decrease (44-74%) of photosynthetic pigment contents was caused by a long-term exposure to high temperature (42°C), while the short-term exposure resulted in 20-46% decline. However, a combined effect of AA and long-term high temperature reduced the total pigment contents by 28-41%. Our results demonstrated that the reduction of the chlorophyll a/b ratio was less significant under the combined effect of AA and high temperature than that under the stressful condition without AA. We observed that short-term and long-term high temperature modified PSII functionality of the first leaves in wheat seedlings, which was manifested by the low maximal quantum yield of PSII photochemistry, maximum fluorescence yield in the dark-adapted state, and by high minimum fluorescence yield in the dark-adapted state. The quantum yield of PSII photochemistry decreased rapidly by 16-24% under the combination of AA and high temperature. Overall, these results suggest that the activation of the alternative pathway, induced by AA, contributed to the stabilization of the photosynthetic apparatus in wheat seedlings under high temperature., A. Batjuka, N. Škute, A. Petjukevičs., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

251-263

Source:

Photosynthetica | 2017 Volume:55 | Number:2

Harvested from:

CDK

Metadata only:

false