Comparative study gas exchange and photosynthetic parameters in two leaf types of wild and domesticated bean (Phaseolus vulgaris L.) [Estudio comparativo de intercambio gaseoso y parámetros fotosintéticos en dos tipos de hojas de frijol (Phaseolus vulgaris L.) silvestre y domesticado]
Article
Overview
Research
Additional Document Info
View All
Overview
abstract
The aim of this study was to compare the gas exchange and some parameters of photosynthesis in primary and tripholiolate leaf of wild and domesticated common bean (Phaseolus vulgaris L.) during early vegetative stage, with de finality of show the photosynthetic efficiency of wild common bean. Two wild common bean samples from Durango and Tlaxcala, Mexico, and the cultivars Amarillo and Bayo Mecentral were cultivated under greenhouse conditions. Stomatal conductance, CO2 assimilation net rate, leave temperature, transpiratory rate, chlorophyll content, and some parameters of the fluorescence of the chlorophyll were evaluated. There were statistical interaction between the leave type and common bean variant (wild common bean from Durango and Tlaxcala, México, and the cultivars Amarillo and Bayo Mecentral) for chlorophyll a and b, the a/b index, beside initial, variable and maxim chlorophyll fluorescence. A high heterogeneity between and within wild samples, independently of its origin was observed, the heterogeneity was observed also among the cultivars (Amarillo and Bayo Mecentral), id est, a wide interspecific (among species) and intraspecific (within species) variability was found. It was concluded that primary and tripholiolate leaf in wild and domesticated variants growing in homogeneous environment show significant differences in physiological characters, all of them are diverse between and within wild variants and wild and domesticates variants evaluated, and conduce to significant differences in PN.
