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Publication Type J
Authors Agha, F., B. Gul and M. A. Khan
Title SEASONAL VARIATION IN PRODUCTIVITY OF ATRIPLEX STOCKSII FROM A COASTAL MARSH ALONG THE ARABIAN SEA COAST
Source Pakistan Journal of Botany
Language English
Author Keywords SALT TOLERANCE ION CONTENT SODIUM-CHLORIDE ENVIRONMENTAL-FACTORS PERENNIAL HALOPHYTE SPECIES RICHNESS GROWTH SALINITY WATER ACCUMULATION
Abstract The productivity of Atriplex stocksii population located near the coast (Gizri Creek) of Karachi, Pakistan was studied for two years. The net biomass production showed seasonal variation and productivity appeared to be influenced by rainfall during both years. Belowground and above ground biomass showed no change during the dry year, however, considerable biomass was produced after the availability of moisture. The above ground dead biomass remained unchanged during 1997-98 but it registered a substantial promotion during the wet season. The ion concentration of root was much higher than shoot. Na+ and Cl- remained high however, the concentration of other ions did not change much during both seasons. Root fresh weight was significantly promoted at low salinity and increase in salinity inhibited root and shoot growth. Fresh weight of shoots at low density was not affected by low salinities, however, at higher salinity concentrations there was no effect of density. Root fresh and dry weight were higher at low density and low salinity, however under high salinity, density had no effect. Succulence on dry weight basis was also higher at higher densities. However, succulence decreased substantially at high salinities on per plant basis. Shoots of A. stocksii accumulated large quantities of Na+ and Cl- whereas other ions were found in lower amount. Na+ and Cl- in root increased but were much lower in comparison to shoot.
Author Address [Gul, Bilquees; Khan, M. Ajmal] Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan. Univ Karachi, Dept Bot, Karachi 75270, Pakistan. [Agha, Farhat] DHA Coll Women, Karachi, Pakistan. Khan, MA, Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan. majmalk@uok.edu.pk
ISSN 0556-3321
ISBN 0556-3321
29-Character Source Abbreviation Pak. J. Bot.
Publication Date Jun
Year Published 2009
Volume 41
Issue 3
Beginning Page 1053-1068
Unique Article Identifier ISI:000268175900010
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