Effects of NaCI stress on nitrogen and phosphorous metabolism in a true mangrove Bruguiera parviflora grown under hydroponic culture

Journal of Plant Physiology
Asish Kumar Parida, Anath Bandhu Das

Abstract

The influence of varying levels of salinity (0, 100, 200 and 400 mM) on the activities of nitrate reductase (NR, E.C. 1.6.6.1), acid phosphatase (ACP, E.C. 3.1.3.2), and alkaline phosphatase (ALP, EC 3.1.3.1 ) as well as on nitrate and phosphate uptake and total nitrogen levels in leaves of a true mangrove Bruguiera parviflora was investigated under hydroponic culture conditions. NR activity increased in 100mM NaCl treated plants, whereas it decreased gradually in 200 and 400 mM treated plants, relative to the controls. Decreased activity of NR by NaCl stress was also accompanied by a decrease in total nitrogen level and nitrate uptake. Decreases in NR activity, nitrate (NO3-), and total nitrogen level due to high salinity may be responsible for a decrease in growth and biomass production in this plant. However, salinity caused an increase in both ACP and ALP activity. Activity staining of ACP by native polyacrylamide gel electrophoresis revealed three isoforms: ACP-1, ACP-2, and ACP-3. We observed a preferential enhancement in the ACP-3 isoform by salinity. In order to understand whether the salinity-induced increase in phosphatase activity was due to inhibition in phosphate uptake, we monitored phosphate (Pi) levels in leaves...Continue Reading

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Citations

Apr 20, 2014·Applied Biochemistry and Biotechnology·Riaz Ur RehmanMuhammad Fayyaz Chaudhary
Jun 6, 2007·Plant, Cell & Environment·B EhltingA Gessler
Jan 6, 2007·The New Phytologist·P DluzniewskaH Rennenberg
Oct 7, 2006·Plant Physiology and Biochemistry : PPB·R SennaE Fialho
Dec 14, 2004·Ecotoxicology and Environmental Safety·Asish Kumar Parida, Anath Bandhu Das
Apr 23, 2015·Plant Physiology and Biochemistry : PPB·Christoph-Martin GeilfusKarl H Mühling
May 13, 2011·Marine Pollution Bulletin·Yung-Ming SuPing-Chun Lucy Hou
Dec 1, 2013·Botanical Studies·Ronaldo José Durigan DalioClaudia Regina Baptista Haddad
Jul 24, 2015·World Journal of Microbiology & Biotechnology·Juan Gerardo Santoyo FigueroaJoong Kyun Kim

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