Avtor/Urednik		Vodnik, Dominik; Gaberščik, Alenka; Gogala, Nada
Naslov		Lead phytotoxicity in Norway spruce (Picea abies (L.) Karst.): the effect of Pb and zeatin-riboside on root respiratory potential
Tip		članek
Vir		Phyton-Ann Rei Bot A
Vol. in št.		Letnik 39, št. 3 Spec Iss
Leto izdaje		1999
Obseg		str. 155-9
Jezik		eng
Abstrakt		Hydroponically grown Picea abies (L.) Karst. seedlings were exposed to lead (5 WM) and zeatin-riboside (ZR) treatments (1 microM, periodically) in a factorial experiment. The influence of Pb and ZR on the seedlings was examined studying photochemical effciency of PSII in green parts and terminal electron transport system (ETS) activity of the root tissue. Lead and cytokinin, separately or in combination, did not influence the light use effciency. The lead exerted an influence mainly on the root system. In Pb treated seedlings ETS activity of the root tissue was lowered by app. 25% in comparison to the control. Zeatin-riboside mitigates the lead induced inhibition of root growth and the ETS activity is even higher than in control plants. Higher potential cespiration increases the ability to overcome stress conditions. The presence of cytokinin in the rhizosphere could be an important factor affecting Pb toxicity.
Deskriptorji		TREES PLANT ROOTS LEAD ZEATIN CHLOROPHYLL CAROTENOIDS GERMINATION ELECTRON TRANSPORT