Interrelation of Ecophysiological and Morpho-Agronomic Parameters in Low Altitude Evaluation of Selected Ecotypes of Sweet Potato (Ipomoea batatas [L.] Lam.)

Abstract

Sweet potato is a crop with a wide capacity to adapt to adverse conditions. To study the tolerance of the sweet potato to a low-altitude environment, 34 genotypes comprising three groups from different altitude conditions ranging from 18–599, 924–1298, 1401–2555 meters above sea level were evaluated. These genotypes were evaluated through ecophysiological parameters: net photosintetic rate (Pn), stomatal conductance (GS), transpiration (E), leaf internal CO2 (ICO2), vapor pressure deficit (VPD) and leaf internal temperate (LT). sSubsequently, water use efficiency (WUE) and carboxylation efficiency index (CEI) were estimated. Simultaneously, morpho-agronomic characterization of the genotypes was conducted including descriptors and morpho-colorimetric parameters. A wide ecophysiological variability was found among genotypes from high, intermediate and low altitudes, when those were evaluated under low altitude conditions. The genotypes that presented major soil coverage efficiency and leaf size showed greater Pn, WUE and CEI, and Low VPD and E, aspects that benefited the ability to form roots the under low-altitude environment. The altitudinal origin of the genotypes influenced the ecophysiological response under low altitude conditions. The capacity of certain sweet potato genotypes to tolerate low altitude conditions were due to to different mechanisms, such as certain morphoagronomic traits that allowed them to adjust their physiological processes, especially those related to photosynthesis.

Leaf gas exchanges and production of kale under Ca(NO3)2 concentrations in salinized nutrient solution

“…A greater gs allows an increase in the flux of CO 2 into the plant and can affect transpiration rates and, subsequently, the A process. The positive correlation between gs and E can be explained by a greater opening of the stomata, causing E to continue along with A (Burbano-Erazo et al, 2020).…”

pomoea batatas(L.) Lam. (Convolvulaceae) as a source of polyphenols with antitumor activity and prospects for in vitro production using chemical elicitors -A Review

“…In this sense, the Colombian organization that has devoted most effort to sweet potato research is Agrosavia (formerly Corpoica), both individually or in association with others. These efforts have an evident agronomic interest and are reflected in the works written by Morales et al (2017), Pérez & Sánchez (2017), Rosero et al (2019), Rosero et al (2020), Burbano et al (2020), Sánchez et al (2020b) and Támara et al (2020).…”

Pigmentos fotosintéticos de Stevia rebaudiana Bert en condiciones diferenciales de luz solar y fertilización nitrogenada en invernadero

“…Para el caso de la estevia en el presente estudio, la mayor producción de Cl a y Cl b (a 300 µmol de fotones m -2 s -1 ) pudo manifestarse como una estrategia propia de las plantas de sombra para tratar de crecer y desarrollarse bajo condiciones de poca luz; sin embargo, esta estrategia no se vio reflejada en la producción de biomasa y en las tasas de asimilación de CO2, que fueron Alfredo de Jesús Jarma-Orozco, Carina Cecilia Cordero-Cordero, José Alejandro Cleves-Leguízamo significativamente menores en un ambiente de baja radiación respecto a uno de alta radiación (datos no mostrados). Es importante aclarar que en condiciones de alta radiación, como las que regularmente se registran en el Caribe colombiano (Burbano-Erazo et al (2020), los pigmentos que (en su orden) procesan mayor cantidad de energía radiante son los carotenos, las clorofilas b y por último las clorofilas a (Taiz & Zeiger, 2012).…”