تأثير الرش بالبرولين في التحمل الملحي لشتلات البرتقال صنف محلي Citrus sinensis (L.)‎ osbeck

Abstract EN

A study was conducted at College of Agriculture, University of Basra during growing season of 2011-2012 to study the effect of proline on salt tolerance of Mahally orange seedlings.

The study included 12 treatments which were four levels of irrigation water salinity (0 , 4 , 8 and 12) dS/m and three concentrations of proline (0 , 75 and 150) mg/L proline.

Results showed that the irrigation water salinity caused decreasing in physical properties where the 12 dS/m level gave least height of seedling leaves number and leaf area which were 76.00 cm , 27.28 and 11.91 cm2 respectively.

Proline treatment increased most properties a sits concentration increased.

Treatment with 150 mg/L proline caused highest plant height, diameter , leaves number and leaf area which were 82.67 cm , 0.47 cm , 42.33 and 14.83 cm , respectively.

Treatment by 12 dS/m level chlorophyll , carbohydrates , proline , dry matter and lowest nitrogen which were 1.197 mg/100 gm , 52.30 mg/100 gm , 802.96 μg/gm dry matter , 22.317% and 1.50% , respectively.

Treatment of proline at 150 mg/L increased total chlorophyll, soluble carbohydrates , free proline , dry matter and nitrogen percentage which were 1.77 mg/100gm, 60.38 mg/100gm, 26.18% and 2.20% respectively.

The interaction between irrigation water salinity level and proline significant for all physical and chemical properties studied.