Journal of Food, Agriculture and Environment

Stomatal conductance, mineral concentration and condensed tannin in three Balanites aegyptiaca (L.) Del. intra-specific sources affected by salinity stress

Author(s):

A. A. Elfeel *, Z. Hindi Sherif, Refaat A. Abohassan

Recieved Date: 2012-10-30, Accepted Date: 2013-01-14

Abstract:

Different levels of salt concentrations (control, 5, 8 and 10 dS m^-1) were subjected to three varied sources of Balanites aegyptiaca, namely SD1, SD2 and KSA under greenhouse conditions. The aim was to investigate the effect of salinity on growth, physiological responses and chemical properties and to examine variability among the three sources. The following parameters were studied: stomatal conductance (G_s), relative water content (RWC), specific leaf area (SLA), condensed tannin and minerals (N, P, Na, Ka, Ca, Mg, Fe, Cu, Mn, Zn), in addition to growth and biomass production. The results revealed that under saline soil seedlings showed lower growth and biomass production, associated with reduced G_s, SLA and RWC. The effect was increased with increasing salinity. In lower salinity (control and concentration 5 dS m^-1), SD1 obtained higher G_s values, while under higher concentrations KSA revealed higher G_s values. It was also noticed that the level of Na in the leaves was increased with increasing salt accumulation in the soil accompanied by decreased N and K contents. Tannin significantly differed among the sources and increased with increasing salinity. The three sources significantly varied in most of the parameters recorded, whereas the interactions between salt treatments and sources were only significant for G_s, indicating that source ranking was consistent in most parameters. SD1 obtained higher values in most of the parameters. With regards to response to salinity, the differences among the three sources highlighted variability in salt tolerance among different intra-specific sources of this species. 

Keywords:

Stomatal conductance, relative water content, specific leaf area, tannin, mineral accumulation, salt stress, sources

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Agriculture
Pages: 466-471

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