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Mguis K.,Unite dAgrosylvopastoralisme | Mguis K.,University of Carthage | Mguis K.,Tunis el Manar University | Albouchi A.,Unite dAgrosylvopastoralisme | Brahim N.B.,University of Carthage
Acta Botanica Gallica | Year: 2011

Ruta graveolens L. is an herbaceous perennial originally native of the Mediterranean region. It is a traditional medicine. The present study evaluate the effect of increasing temperature and NaCI concentrations on final percentage of germination (FGP) and the mean germination time (MTG) of Zaghaoun' variety seeds during a period of sixtheen days. Germination is inhibited by either an increase or decrease in temperature and the optimal of germination was 30 °C After that, at 30 °C, seeds are subjected to 0, 50, 100,150 and 200 mM NaCI concentrations. The maximum germination percentage (88%) is recorded after ten days under non-saline conditions. The increase of NaCI concentration reduced significantly the final germination percentage and germination rate (estimated by MTG). Source


Mguis K.,Unite dAgrosylvopastoralisme | Mguis K.,Tunis el Manar University | Mguis K.,Laboratoire Of Botanique | Albouchi A.,Unite dAgrosylvopastoralisme | And 4 more authors.
Acta Botanica Gallica | Year: 2011

In order to study the salt effect on Aegilops geniculata and durum wheat, three accessions of Aegilops geniculata, 'Aιn Zana', 'Zaghouan" and 'Sbitla', and one variety of wheat (Triticum durum) have been studied. Growth and gas exchanges parameters were measured at the reproductive stage. This study has shown a high degree of variation of these characters mainly related to geographical origin. It was observed that 'Sbitla' accession is less affected by the imposed salt stress than all the others while 'AAιnn Zana' is the most affected one. Among the factors inhibiting photosynthetic activity under salinity, those of a stomatal and non-stomatal nature have a greater effect. This approach could be used to select tolerant accessions to salt. Source


Mguis K.,Unite dAgrosylvopastoralisme | Mguis K.,Laboratoire Of Botanique | Mguis K.,Tunis el Manar University | Albouchi A.,Unite dAgrosylvopastoralisme | And 6 more authors.
Acta Physiologiae Plantarum | Year: 2013

In order to investigate the effect of salinity on the growth and photosynthesis of the wild wheat and wheat, three accessions of Aegilops geniculata from Ain Zana, Zaghouan and Sbitla and one variety of durum wheat (Triticum durum) were grown in the INRAT greenhouse and treated with different salinity levels. The growth of leaves, water status and gas exchange parameters have been measured at the reproductive stage. The flag leaf length, total leaf dry weight, water status, CO2 assimilation rate, stomatal conductance, intercellular CO2 and transpiration for the three Ae. geniculata accessions and wheat variety significantly decreased with increasing salt. The decline in photosynthesis measured in response to salt stress was proportionally greater than the declines in transpiration, resulting in a reduction of water-use efficiency, at both the leaf and whole-plant levels. Among the factors inhibiting photosynthetic activity, those of a stomatal nature had a greater effect. This study has shown a high degree of variation of these characters mainly related to geographical origin. It was observed also that Sbitla accession was less affected by the imposed salt stress than all the others while Ain Zana was the most affected one. © 2013 Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków. Source

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