The effect of handling on photosynthesis, transpiration, respiration, and nitrogen and carbohydrate content of populations of Lolium perenne [non-destructive growth analysis, thigmomorphogenesis]

amidon carbohydrate content cell respiration contenido de carbohidratos espacement espaciamiento estres experimentation genotipos genotypes handling lolium perenne manutention nitrogen content photosynthese photosynthesis plant response respiration cellulaire respuesta de la planta spacing starch stress teneur en azote teneur en glucides transpiration