Naslov
Effects of CaCl2 and CaBr2 on Growth, Photosynthetic Pigments and Ion Accumulation in Duckweed

Autori
Vidaković-Cifrek, Željka ; Wonisch, Astrid ; Tausz, Michael ; Grill, Dieter

Izvornik
Phyton (0079-2047) 45 (2005), 2; 183-196

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
calcium chloride; calcium bromide; high density brines; photosynthetic pigments; duckweed; Lemna minor

Sažetak
Duckweed (Lemna minor L.) was exposed to solutions of calcium chloride, calcium bromide and their 1:1 mixture, commonly used as oil industry high density brines. These solutions were added into nutrient media in volumes appropriate to achieve the following final concentrations: 0.025, 0.05, 0.075 and 0.1 mol L-1. The two higher concentrations (0.075 and 0.1 mol L-1) of all three tested samples caused disturbed water content in plants after 14 days of cultivation. On media supplemented with CaCl2, certain accumulation of chloride, depending on the concentration of tested salts, was detected. After the treatment with CaBr2, chloride content was lower in comparison to control. Mixture (1:1) of the both chemicals caused slightly increased chloride content, except when was present in concentration 0.1 mol L-1. CaBr2 and 1:1 mixture in concentrations 0.025, 0.05 and 0.075 mol L-1 showed evident increase of bromide content. Comparing the calcium content in control and treated plants, a significant difference has not been established. Generally, chlorophyll a and chlorophyll b content was increased only after treatment with lower concentrations (0.025 and 0.05 mol L-1) of samples that contained bromine. The main reason for high density brines effect on duckweed observed in the present investigations as well as in previous studies could be the chloride and bromide accumulation in plants as well as increased osmotic effects of two higher concentrations applied.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA