Effects of calcium, stress on contents of chlorophyll and carotenoid, LPO levels, and antioxidant enzyme activities in Mentha
In: Journal of plant nutrition, Jg. 28 (2005), Heft 1, S. 127-139
academicJournal
- print, 1 p.3/4
Zugriff:
The distribution of chlorophyll and carotenoid contents and antioxidant enzyme activities such as superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, EC 1.11.1.6), ascorbate-dependent peroxidase (AsA-dep POD, EC 1.11.1.11), guaiacol-dependent peroxidase (Gua-dep POD, EC 1.11.1.7), and lipid peroxidation levels (LPO) were investigated according to the leaf positions of Mentha pulegium grown in the presence of 4000 MM Ca2+ and in the absence of Ca2+ on the 14th day after the start of treatments. After reaching the highest values at leaf 6, chlorophyll-carotenoid content, SOD, CAT activities decreased as the leaves aged. The variations in chlorophyll-carotenoid contents and antioxidant enzyme activities were investigated with decreasing Ca2+ concentrations ranging from 2000 to 0 μM with respect to time. The chlorophyll-carotenoid values increased in the absence of Ca2+ approximately 4.5-fold compared to the control plant over the 19 days of the stress period. SOD activity also increased approximately 2-fold with decreasing Ca2+ concentrations on the 14th day and decreased afterward. Whereas CAT, AsA-dep, and Gua-dep POD activities were observed under the control levels up to 14th day and then increased over them. The LPO levels in the stress conditions increased with decreasing Ca2+ concentrations during the most of the treatment period. The peroxidation of polyunsaturated fatty acids in M. pulegium membranes was highly suppressed by at least 100 μM Ca2+ concentration in the growth medium.
Titel: |
Effects of calcium, stress on contents of chlorophyll and carotenoid, LPO levels, and antioxidant enzyme activities in Mentha
|
---|---|
Autor/in / Beteiligte Person: | CANDAN, Nilgün ; TARHAN, Leman |
Link: | |
Zeitschrift: | Journal of plant nutrition, Jg. 28 (2005), Heft 1, S. 127-139 |
Veröffentlichung: | Philadelphia, NJ: Taylor & Francis, 2005 |
Medientyp: | academicJournal |
Umfang: | print, 1 p.3/4 |
ISSN: | 0190-4167 (print) |
Schlagwort: |
|
Sonstiges: |
|