ORIGINAL RESEARCH
Modulation of Photosynthesis, Phenolic Contents, Antioxidant Activities, and Grain Yield of Two Barley Accessions Grown under Deficit Irrigation with Saline Water in an Arid Area of Tunisia
Mohamed Bagues 1, 2  
,  
Chokri Hafsi 3  
,  
Yassine Yahia 1
,  
Ikbel Souli 1
,  
 
 
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1
Laboratoire d’Aridocultures et Cultures Oasiennes, Institut des Régions Arides, Médenine, Tunisie
2
Faculté des Sciences de Sfax, Sfax, Tunisie
3
Laboratoire des plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
CORRESPONDING AUTHOR
Mohamed Bagues   

Institute of Arid Regions of Medenine, Institute of Arid Regions of Medenine, 4119 Medenine, Tunisia
Online publish date: 2019-05-01
Publish date: 2019-05-28
Submission date: 2018-03-09
Final revision date: 2018-06-25
Acceptance date: 2018-07-03
 
Pol. J. Environ. Stud. 2019;28(5):3071–3080
KEYWORDS
TOPICS
Plants
 
ABSTRACT
The effects of irrigation with saline water were studied on barley plants cultivated under arid conditions at the Institute of Arid Regions located in the South East of Tunisia. Two barley accessions (Karkeni and Bengardeni) and three regimes of irrigation as a function of the cultural evapotranspiration ETc (T0: 100% ETc, T1: 75% ETc and T2: 50% ETc) were used. Several parameters – gas exchange (A, E and gs), total flavonoid contents (TFC), total phenolic contents (TPC), phenolic compounds, antioxidant activity (DPPH and ABTS) and grain yield (GY) – were used to assess the effects of the studied factors on barley plants. Gas exchange parameters (A, E and gs) vary significantly between treatments. Salinity stress had no significant effect on TPC and TFC. Phenolic compounds varied significantly between treatments and accessions. In addition, their antioxidant activity based on DPPH and ABTS scavenging assays increased and are more important in Karkeni than Bengardeni under soil salinity. In addition, soil salinity decreased yield and yield components. Karkeni was more productive than Bengardeni.
eISSN:2083-5906
ISSN:1230-1485