Título
Changes in carbohydrate concentration in leaves, PODS and seeds of dry bean plants under drought stress
Autor
VICTOR ARTURO GONZALEZ HERNANDEZ
MARIA GRICELDA VAZQUEZ CARRILLO
AMALIO SANTACRUZ VARELA
ADRIANA DELGADO ALVARADO
Ma. Claudia Castañeda Saucedo
LEOBIGILDO CORDOVA TELLEZ
Ernesto Tapia Campos
GABINO GARCIA DE LOS SANTOS
Nivel de Acceso
Acceso Abierto
Resumen o descripción
"Changes in the concentration of sucrose, glucose, fructose and starch, in leaves, seeds and pods of Phaseolus vulgaris L. cv "Otomí" of determinate growth habit, were evaluated under both drought stress and non stress (irrigated) conditions. Plants were submitted to drought stress during the flowering, pod formation and seed filling stages. The stress increased the concentrations of glucose from 18 up to 196% and of fructose from 20 up to 333% in mature leaves, likely due to starch hydrolysis, while showing starch reductions from 17 up to 46% and sucrose reductions from 41 up to 70%. These changes in leaves promoted the sugar exports toward pods and seeds, since their sucrose concentration increased. In the reproduc- tive organs, the concentration of glucose and fructose of stressed plants increased 136 and 138% in pods and 83 and 73% in seeds, respectively. Contrary to the changes registered in leaves, in repro- ductive tissues the sucrose increased up to 238% in pods and up to 148% in seeds, while the starch became reduced down to 37% in pods and to 21% in seeds. The increase of hexoses in pods and seeds might be explained by in situ starch hydrolysis, whereas the increase in sucrose is probably due to an enhanced synthesis of this sugar for a higher osmotic adjustment"
Editor
Asociación Interciencia
Fecha de publicación
22 de febrero de 2012
Tipo de publicación
Artículo
Recurso de información
Formato
application/pdf
Fuente
Interciencia, vol. 37, núm. 3, marzo, 2012, pp. 168-175
Idioma
Inglés
Repositorio Orígen
Repositorio Institucional de CIATEJ
Descargas
392