EPIDERMAL CHARACTERS OF PTEROCACTUS (OPUNTIOIDEAE, CACTACEAE)

FAIGÓN, A.; GALATTI, B; ROSENFELDT, S.; KIESLING, R.

HASELTONIA

CACTUS SUCCULENT SOC AMER INC

Año: 2011 vol. 16 p. 57 - 66

1070-0048

Abstract: Stem epidermis of eight Pterocactus species was examined under light microscopy (LM) and scanning electron microscopy (SEM). The stomata belong to the paracytic type, with two to five subsidiary cells. The size of stomata and papillae and the density of both were measured and counted under LM. Under SEM the micromorphology of papillae was studied. These characters were used to distinguish anatomically the species of Pterocactus. Stem epidermis of eight Pterocactus species was examined under light microscopy (LM) and scanning electron microscopy (SEM). The stomata belong to the paracytic type, with two to five subsidiary cells. The size of stomata and papillae and the density of both were measured and counted under LM. Under SEM the micromorphology of papillae was studied. These characters were used to distinguish anatomically the species of Pterocactus. Resumen: Las epidermis de los tallos de 8 especies de Pterocactus fueron examinadas con microscopio óptico (MO) y Microscopio Electrónico de Barrido (MEB). Los estomas corresponden al tipo paracítico, con dos a cinco células subsidiarias. El tamaño de los estomas y de las papilas, como así también la densidad de ambos fueron medidos y contados con el MO. La micromorfología de las papilas fue estudiada con MEB. Estos carácteres fueron usados para distinguir anatómicamente las especies de Pterocactus.