High temperature stress can hinder the development of cowpea resulting in several damages including vegetative and reproductive phases of the crop. In this context, the objective of this study was to select cowpea cultivars tolerant to high temperature stress using various parameters related to physiological, biochemical, and yield aspects. For this, the cultivars Carijó, Itaim, Pujante, Rouxinol, and Tapahium were used, maintained in two temperature regimes: 20–26–33 °C and 24.8–30.8–37.8 °C. The experiment was carried out in growth chambers, in a 5 × 2 factorial arrangement (cultivars × temperature regimes). Responses differentiated among the cultivars Carijó, Itaim, Pujante, Rouxinol, and Tapahium with the increase of 4.8 °C in air temperature. The high temperature promoted a greater quantity of aborted flowers, leading to a reduction in the yield of the cultivars Carijó, Pujante, Rouxinol, and Tapahium. The photosynthesis, stomatal conductance, leaf transpiration and enzymatic activities were significantly influenced by high temperature. From the combination of the responses of biometric, physiological and productive variables, the cultivar Itaim can be considered as tolerant to an increase of 4.8 °C in air temperature.

高温胁迫会阻碍豇豆的发育，导致多种损害，包括作物的营养和繁殖阶段。在这种背景下，本研究的目的是利用与生理、生化和产量方面相关的各种参数来选择耐受高温胁迫的豇豆品种。为此，使用了 Carijó、Itaim、Pujante、Rouxinol 和 Tapahium 等品种，并维持在两种温度范围：20–26–33 °C 和 24.8–30.8–37.8 °C。该实验在生长室中以 5 × 2 因子排列（品种 × 温度条件）进行。随着气温升高 4.8 °C，Carijó、Itaim、Pujante、Rouxinol 和 Tapahium 品种之间的反应有所差异。高温导致更多的花败育，导致 Carijó、Pujante、Rouxinol 和 Tapahium 等品种的产量下降。高温对光合作用、气孔导度、叶片蒸腾作用和酶活性影响显着。综合生物特征、生理和生产变量的响应，可以认为 Itaim 品种能够耐受 4.8 °C 的气温升高。