The changes of contents of selected free amino acids associated with cadmium stress in Noccaea caerulescens and Arabidopsis halleri

0420943 - ÚEB 2014 RIV CZ eng J - Journal Article
Zemanová, V. - Pavlík, Milan - Pavlíková, D. - Tlustoš, P.
The changes of contents of selected free amino acids associated with cadmium stress in Noccaea caerulescens and Arabidopsis halleri.
Plant, Soil and Environment. Roč. 59, č. 9 (2013), s. 417-422. ISSN 1214-1178. E-ISSN 1805-9368
Institutional research plan: CEZ:AV0Z50380511
Keywords : heavy metals * nitrogen-transport amino acids * Thlaspi caerulescens
Subject RIV: EF - Botanics
Impact factor: 1.113, year: 2013
http://www.agriculturejournals.cz/publicFiles/100270.pdf

Changes of free amino acid (AA) contents (glutamic acid, glutamine, aspartic acid, asparagines, proline, hydroxyproline) in Noccaea caerulescens and Arabidopsis halleri under cadmium soil contamination (Cd1 = 30, Cd2 = 60, Cd3 = 90 mg/kg soil) are reported. Results of the pot experiment confirmed different effect of wCd on wN. caerulescens in contrast to A. halleri and the higher stress adaptation of A. halleri. Total free AA contents in both plant species were not significantly modified by Cd contamination. The glutamic acid and glutamate contents in plant biomass were decreased under Cd2 and Cd3 stress. The declines of contents of both AA can be caused by intensive syntheses of plant defense elicitors, but declines in A. halleri were significantly lower in contrast to N. caerulescens. The content of aspartic acid was increased in N caerulescens under Cd stress, but in A. halleri its changes were not observed. The different pathways of nitrogen utilization of tested plants were confirmed: the major AA forms used for nitrogen transport are glutamate for N caerulescens and asparagine for A. halleri. The increase of proline content was determined only in N. caerulescens growing under Cd stress in the beginning of growing period.
Permanent Link: http://hdl.handle.net/11104/0227473