CHARACTERIZATION OF SOME MORPHO-PHYSIOLOGICAL RESPONSES, SEED CHEMICAL COMPOSITION AND GRAIN YIELD IN LENTIL VARIETIES ( Lens culinaris Medik culinaris) UNDER IRRIGATED AND RAINFED CONDITIONS

F. Tahir, A. Hassani, W. Rezzoug
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Abstract

In Algeria, pulses are rain crops and are drought-prone during their breeding period, resulting in a loss of yield. To this end, four varieties of lentil are tested for their drought tolerance through bio-stress indicators in a field trial during the 2016/2017 crop year. Plants are grown under rained and irrigated conditions (irrigation + rainfall), from the "flowering" stage to the "filling of grains" stage. The results indicated that drought stress significantly decreased the relative water content (13.4%), leaf surfaces (32.21%), and grain yield of all genotypes tested (58.37%). The chemical composition of lentil seeds showed a reduction in starch content (4.41%) and an increase in protein content (32.21%). Potassium ions and Sodium ions were present at the highest and lowest concentrations (747.91ppm- 4.5ppm) in rainfall conditions, respectively, while Ca++, PO4-, and Mg++ concentrations were not affected by drought. In conclusion, the emphasis on bio-indicators of water stress tolerance at the reproductive period is of great importance in minimizing grain yield losses and the quality of seeds.
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油菜品种(Lens culinaris Medik culinaris)在灌溉和降雨条件下的某些形态生理反应、种子化学成分和产量的表征
在阿尔及利亚,豆类是雨水作物,在繁殖期容易干旱,导致产量下降。为此,在2016/2017作物年的一项田间试验中,通过生物胁迫指标测试了四个扁豆品种的耐旱性。植物生长在雨水和灌溉条件下(灌溉+降雨),从“开花”阶段到“灌浆”阶段。结果表明:干旱胁迫显著降低了叶片相对含水量(13.4%)、叶表面积(32.21%)和相对含水量,扁豆种子的化学成分显示淀粉含量降低(4.41%),蛋白质含量增加(32.21%)。在降雨条件下,钾离子和钠离子的浓度分别为最高和最低(747.91ppm-4.5ppm),而Ca++、PO4-和Mg++浓度不受干旱影响。总之,在生殖期强调水分胁迫耐受性的生物指标对于最大限度地减少粮食产量损失和种子质量具有重要意义。
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