Interactions between iron and titanium metabolism in spinach: A chlorophyll fluorescence study in hydropony

0355815 - ÚOCHB 2011 RIV PT eng J - Journal Article
Cígler, Petr - Olejníčková, Julie - Hrubý, Martin - Cséfalvay, Ladislav - Peterka, J. - Kužel, S.
Interactions between iron and titanium metabolism in spinach: A chlorophyll fluorescence study in hydropony.
Journal of Plant Physiology. Roč. 167, č. 18 (2010), s. 1592-1597. ISSN 0176-1617. E-ISSN 1618-1328
Institutional research plan: CEZ:AV0Z40550506; CEZ:AV0Z40500505; CEZ:AV0Z60870520
Keywords : chlorophyll fluorescence * iron * photosynthetic apparatus * spinach * titanium
Subject RIV: CC - Organic Chemistry
Impact factor: 2.677, year: 2010

We investigated the interconnection between the Fe uptake and the Ti intoxication in model experiment on Fe-deficient spinach plants to elucidate the mechanism of the biological activity of titanium in plants. The two different Ti (0 and 20mgL−1) and Fe (0 and 1.35mgL−1) concentrations in hydroponic medium were used in all four possible combinations. We compared chemical analysis of Ti and Fe in plants with the changes of the in vivo chlorophyll fluorescence. Although Fe and Ti concentration found in shoots of Ti-non-treated Fe-deficient plants was comparable with that in Ti-treated Fe-deficient plants, the Ti in the growth media had a negative effect on photosynthetic activity. The presence of Fe in medium significantly decreased the Ti concentration in shoots and increased the photosynthetic activity. We proposed that Ti affect components of electron transport chain containing Fe in their structure (particularly photosystem I) and decrease the photosystem II efficiency.
Permanent Link: http://hdl.handle.net/11104/0194496