Abstract：
Cowpea is a leguminous plant belonging to the fabaceae family cultivated in the North and Northeast regions of Brazil, with productive potential. Among the abiotic factors, water deficiency is one of the main environmental limitations that influence agricultural production in the world. The objective of this work was to study the relative water content and osmoregulators of cowpea plants subjected to water stress. The experiment was carried out in a greenhouse at the Universidade Federal Rural da Amazônia (UFRA, Belém, PA), cowpea plants BR-17 Gurguéia Vigna unguiculata (L.) Walp were used. The experimental design was completely randomized (DIC) in a 2 × 2 factorial scheme, two water conditions (control and water deficit) and two times of stress (four and six days of water suspension), with 7 replications, totaling 28 experimental units. The water deficit affected plants, causing a reduction in relative water content (69.98%), starch (12.84% in leaves and 23.48% in roots) and carbohydrates (84.34%), and an increase in glycine-betaine, sucrose (114.11% in leaves and 18.71% in roots) and proline (358.86%) at time 2. The relative water content was negatively affected by water conditions, with a decrease in relation to the interaction of the aerial part and the root system. Therefore, greater metabolic responses were noted in plants that were subjected to stress treatment at time 2 (6 days).
摘要：
Cw豆是一种豆科植物，属于巴西北部和东北地区种植的豆科植物，具有生产潜力。在非生物因素中，缺水是影响世界农业生产的主要环境限制之一。这项工作的目的是研究受水分胁迫的of豆植物的相对含水量和渗透调节剂。该实验是在联邦农村达亚马逊大学的温室中进行的（UFRA，贝伦,PA),of豆植物BR-17GurguéiaVignaunguiculata（L.)Walp被使用。实验设计是2×2阶乘方案中的完全随机（DIC），两种水条件（控制和水分亏缺）和两次压力（4天和6天的水悬浮），有7次重复，共28个实验单元。缺水影响了植物，导致相对含水量减少(69.98%)，淀粉（叶中占12.84％，根中占23.48％）和碳水化合物（84.34％），甘氨酸甜菜碱的增加，时间2的蔗糖（叶中为114.11％，根中为18.71％）和脯氨酸（358.86％）。相对含水量受到水条件的负面影响，与空中部分和根系的相互作用有关。因此,在时间2(6天)受到胁迫处理的植物中注意到更大的代谢反应。
