- Tytuł:
- Seasonal changes of violaxanthin cycle pigment de-epoxidation in wintergreen and evergreen plants
- Autorzy:
-
Dymova, Olga
Golovko, Tamara - Powiązania:
- https://bibliotekanauki.pl/articles/1039803.pdf
- Data publikacji:
- 2012
- Wydawca:
- Polskie Towarzystwo Biochemiczne
- Tematy:
-
de-epoxidation state
carotenoids
xanthophyll cycle - Opis:
- We studied carotenoids composition and the activities of the xanthophylls pigments in evergreen conifers (Abies sibirica, Juniperus communis, Picea obovata) and dwarf-shrub (Vaccinium vitis-idaea), and in wintergreen herbaceous plants (Ajuga reptans, Pyrola rotundifolia) growing near Syktyvkar (61°67/ N 50°77/ E). The carotenoid pool consisted mainly of following xanthophylls: lutein (70%), neoxanthin (7-10%) and a xanthophylls cycle component - violaxanthin (3-15%). Zeaxanthin and antheraxanthin were found in conifer samples collected in December-March while in other species - during all year. A direct connection between xanthophyll pigment de-epoxidation level and light energy thermal dissipation was shown only for boreal conifer species. It is proposed that zeaxanthin plays a central role in the dissipation of excess excitation energy (nonphotochemical quenching) in the antenna of photosystem II (PSII). We conclude that the increase in the extent of de-epoxidation is beneficial for the retention of PSII activity for conifers in early spring and for herbs in summer.
- Źródło:
-
Acta Biochimica Polonica; 2012, 59, 1; 143-144
0001-527X - Pojawia się w:
- Acta Biochimica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł