Izvorni znanstveni članak
Effect of NaCl Salinity on Growth, Nodulation and Total Nitrogen Content in Sesbania Sesban
A. Mahmood
; Department of Botany, University of Karachi, Karachi-75270, Pakistan
Mohammad Athar
; California Department of Food and Agriculture, 3288 Meadowview Road, Sacramento, CA 95832, USA
Raiha Qadri
; Department of Botany, University of Karachi, Karachi-75270, Pakistan
Nadeem Mahmood
; Department of Computer Science, University of Karachi, Karachi-75270, Pakistan
Sažetak
A pot experiment was conducted to determine the effect of salinity on growth nodulation and nitrogen content of Sesbania sesban. Fifteen days old S. sesban seedlings grown in sandy loam soil were irrigated with NaCl solution of 0.034 mol/L, 0.069 mol/L, 0.103 mol/L, 0.137 mol/L and 0.172 mol/L. The plants were harvested after 80 days. Fresh and dry weight of shoots and roots and root- shoot ratio decreased progressively with the increasing salinity levels. Root showed more inhibition than shoot. Nodules were observed on the roots of plants growing in all fi ve salinity levels but they showed morphological alterations in size and shape. The number and size of the nodules per plant and their fresh and dry weight decreased with increasing salinity levels. The percentage of tissue nitrogen also decreased progressively with the increasing salinity levels.
Ključne riječi
nodulation; nitrogen-fixation; salinity; Sesbania sesban; Papilionoideae; Rhizobium
Hrčak ID:
26823
URI
Datum izdavanja:
22.9.2008.
Posjeta: 1.451 *