Effect of high levels of boron on the yield, boron content, boron uptake and anatomical structure of some wheat cultivars [electronic resource].

Includes references.

Four wheat cultivars (Triticum aestivum) ie., Sakha 8, Sakha 69, Sakha 93 and Sids 1 were treated with high levels of boron to detect the tolerant and sensitive cultivars. Sakha 69 was relatively tolerant to boron and Sids 1 was relatively sensitive to boron. The tolerant (Sakha 69) and sensitive (Sids 1) cultivars were treated with nutrient solution in a sand culture with different boron levels as boric acid (0, 0.5, 1,2,4,8 and 16 mg B L⁻¹). Increasing level of boron up to 1 mg/L increased straw and grain yields of two cultivars. The greatest yields was recorded at 0.5 mg B/L. High levels of boron above 1 mglL caused a gradual decrease in straw, grain and weight of 100 grains for sensitive and resistant wheat cultivars. Application of boron was more effective in its B-uptake by straw and grains and in Sids 1 than in Sakha 69. Tissue examination revealed that the total area of conductive tissue in the stem was greater than the ground tissue which was lower in Sakha 69 (boron-resistant) as compared with Sids 1 (boron-sensitive). However the opposite trend was observed in the roots tissues. This might be the reason for higher ability of Sakha 69 to transport boron to the stem and withstand the unfavorable effect of high boron levels on root growth. Sids 1 accumulated more B than Sakha 69 in the root and consequently less B transported to stems.

Summary in Arabic.

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