EFFECT OF GROWTH REGULATORS, SALINITY AND HEAVY METAL STRESSES ON ACID PHOSPHATASE ACTIVITY OF SUNFLOWER COTYLEDONS | ||||
| Journal of Plant Production | ||||
| Article 3, Volume 34, Issue 5, May 2009, Page 4731-4739 PDF (530.28 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2009.117282 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. M. El-Shora; Amany H. S. M. Hamoda | ||||
| Botany Dept., Faculty of Science, Mans. Univ., Mansoura, Egypt | ||||
| Abstract | ||||
| Acid phosphatase (EC 3. 1. 3. 2) activity was measured in sunflower (Helianthus annus L.) cotyledons. The present results indicate that the tested growth regulators indoleacetic acid (IAA), naphthylacetic acid (NAA) and indolephenoxyacetic acid (IPA) induced acid phosphatase activity at concentration range 100-400 µM. The enzyme was inhibited by CdCl2 and PbCl2 at 20-100 µM. Cd2+ and Pb2+ enhanced lipid peroxidation and H2O2 content. Malondialdehyde (MDA) content was reduced in cotyledons pretreated with GA3. Salinity induced lipid peroxidation and increased H2O2 content. NaCl at low concentrations (50 and 100 mM) induced the enzyme activity whereas the higher concentrations (150-300 mM) reduced the activity. Coronatine (COR) at 100 µM alleviated partially the toxic effect of salinity. | ||||
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