Resistance of Arabidopsis thaliana L. photosynthetic apparatus to UV-B is reduced by deficit of phytochromes B and A

Aleksandra Yu Khudyakova, Vladimir D. Kreslavski, Galina N. Shirshikova, Sergey K. Zharmukhamedov, Anatoly A. Kosobryukhov, Suleyman I. Allakhverdiev

研究成果査読

24 被引用数 (Scopus)

抄録

The photosynthetic responses of 25-day-old Arabidopsis phyA phyB double mutant (DM) compared with the wild type (WT) to UV-B radiation (1 W m− 2, 30 min) were investigated. UV-B irradiation led to reduction of photosystem 2 (PS-2) activity and the photosynthetic rate. In plants grown under both white and red light (λm - 660 nm) the reduction was greater in DM plants compared to the WT. Without UV-B irradiation a decrease in PS-2 activity was observed in DM grown under RL only. It is assumed that the lower content of UV-absorbing pigments and carotenoids observed in DM may be one of the reasons of reduced PS-2 resistance to UV-B. Higher decrease in activities under UV in DM plants grown under RL compared to DM plants grown under white light is likely due to the lack of activity of cryptochromes in plants grown under red light. Rates of post-stress recovery of photosynthetic activity of DM compared with WT plants under white and red light of low intensity were studied. Almost complete recovery of the activity was found which was not observed under dark conditions and in the presence of a protein synthesis inhibitor, chloramphenicol. It is assumed that phytochrome system participates in stress-protective mechanisms of the photosynthetic apparatus to UV-radiation.

本文言語English
ページ(範囲)41-46
ページ数6
ジャーナルJournal of Photochemistry and Photobiology B: Biology
169
DOI
出版ステータスPublished - 4月 1 2017
外部発表はい

ASJC Scopus subject areas

  • 放射線
  • 放射線技術および超音波技術
  • 生物理学
  • 放射線学、核医学およびイメージング

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