A morphological and cytological study of Petunia hybrida exposed to UV-B radiation [microtubules, photomorphogenesis]

cell division cell structure citologia crecimiento croissance cytologie cytology division cellulaire epiderme epidermis estructura celular etapas de desarrollo de la planta growth light luz morphogenese morphogenesis petunia plant developmental stages rayonnement ultraviolet structure cellulaire ultraestructura ultrastructure ultraviolet radiation