ABIOCHEMICAL STUDY OF LUPINUS LUTEUS L. UNDER BORON TOXICITY WITH POSSIBILITY OF CULTIVATION IN THE SOUTHERN REGION OF IRAQ

Abstract

A study was conducted in aie by the diversity of boron ratios in their lands, in addition to examine to test the cultivation of this plant in the southern region of Iraq and within two regions that were characterized the toxicity effect of Boron (B) in Lupines luteus L. plant with four concentrations (0, 2.5, 5 and 10 mg/kg) to test the plant tolerant of boron toxicity. Boron spread in agricultural soil in two regions: Al- Hutta in the north of Basra city and Abu-Alkhasib in the west. It was concluded from the experiment that the plant toxicity symptoms of Boron appeared on the leaves at 5 mg/kg, with necrosis, chlorosis, and blackness in the edges of the leaves and increased in 10 mg/kg B. The accumulation of B in the leaves with increasing their concentration. Total biomass were decreased to 45% while plant tissue-B increased. Photosynthesis pigments (chlorophyll and carotenoids) were reduced 45% with increased B treatments; soluble carbohydrates and proteins were decreased by 72% and 78%, respectively, with excess B. The conclusion from the experiment that the first region (Al-Hutta) is the best in planting a L. luteus plant, and Abu-Alkhasib is not suitable for cultivating this plant. The L. luteus plant is one of the plants that tolerant the toxicity of B at a level less than 5 mg/kg.