Investigation of the gliphosate impact on the leaf gas exchange and the photosynthetic pigments content in some perennial weeds

dosage dose dosificación fotosíntesis gas exchange herbicidas herbicide herbicides intercambio de gases malezas perennes mauvaise herbe vivace perennial weeds photosynthesis photosynthèse pigment pigmentos pigments plantas transgénicas plante transgénique transgenic plants zea mays échange gazeux