Responses to Induced Passive Heat in Two Local Common Bean (<i>Phaseolus vulgaris</i> L.) Varieties Under Humid Tropical Field Conditions in Costa Rica.

ABSTRACT: Climate change is a major constraint for common bean (Phaseolus vulgaris L.) cultivation in tropical regions, where elevated temperatures drastically affect reproductive efficiency and yield. This study aimed to evaluate the response of two local varieties, Matambú and Tayní, under passive induced heat using Open Top Chambers (OTC) in the humid tropics of Costa Rica. A factorial randomized block design with two genotypes and two environments (control and OTC) was applied to assess morphological, physiological, and yield-related traits. OTC increased daily maximum, minimum, and mean air temperatures by +2.29, +0.93, and +2.80 °C, respectively, and raised cumulative growing degree days by 325 °C·day^-1 compared with the control. Heat stress reduced grain yield

SUBMITTER: Diedhiou I 

PROVIDER: S-EPMC12656148 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature