UV-B response of greening barley seedlings
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Tartalom: http://real.mtak.hu/70338/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Article
Cím:
UV-B response of greening barley seedlings
Létrehozó:
Fedina, Ivanka
Velitchkova, Maya
Georgieva, Katya
Nedeva, Dimitrina
Çakırlar, H.
Kiadó:
Akadémiai Kiadó
Dátum:
2009
info:eu-repo/date/embargoEnd/2029-06-30
Téma:
QH Natural history / természetrajz
Tartalmi leírás:
The relationship between the greening stage of barley seedlings and their response to UV-B irradiation
was studied. Etiolated barley seedlings (Hordeum vulgare L., cv. Alfa) greened 12, 24 and 48 h were
exposed to UV-B irradiation (312 nm) for 5 h. As a result of UV-B treatment the rate of CO2 fixation
and chlorophyll contents decreased but flavonoids, UV-B-induced compounds and carotenoids
increased. The inhibition of photosynthesis in green plants was lower in comparison to greening ones.
The 12 h greening plants were more sensitive to UV-B treatment than the plants greening 24 h and particularly
48 h, estimated by the quantum efficiency of PSII photochemistry and the oxygen production
rate. The levels of flavonoids and UV-B induced compounds enhanced with increasing the greening time.
Activity of antioxidant enzymes catalase, peroxidase and superoxide dismutase increased during the
seedlings greening and as a result of UV-B irradiation, but the pattern of isoforms remained similar to
those found in the controls. UV-B preferentially induced Cu,Zn-superoxide dismutase. Increase of UVB
induced synthesis of antioxidant enzymes is in line with their important role in the plant response to
UV-B stress. Data presented show that the response of barley seedlings to UV-B irradiation is related to
the development stage of photosynthetic apparatus.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Fedina, Ivanka and Velitchkova, Maya and Georgieva, Katya and Nedeva, Dimitrina and Çakırlar, H. (2009) UV-B response of greening barley seedlings. Acta Biologica Hungarica, 60 (2). pp. 195-210. ISSN 0236-5383
Kapcsolat:
https://doi.org/10.1556/ABiol.60.2009.2.7
Létrehozó:
info:eu-repo/semantics/embargoedAccess