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Leaf surface of two understorey shrubs Rudgea Decipiens Müll. Arg. and Rudgea macrophylla Benth. (Rubiaceae)

SUPERFÍCIE FOLIAR DE RUDGEA DECIPIENS MÜLL. ARG. E RUDGEA MACROPHYLLA BENTH. (RUBIACEAE)

ABSTRACT

MICROMORPHOLOGICAL CHARACTERISTICS OF LEAF SURFACE OF TWO SPECIES OF RUDGEA ARE PRESENTED. THE STUDY WAS BASED ON MATERIAL FROM THE UNDERSTOREY OF ATLANTIC FOREST. SPECIAL ATTENTION IS PAID TO THE OCCURENCE OF SMOOTH AND STRIATED CUTICLE, TO PARACYTIC STOMATA,(SOME OF WHICH EXIHBIT AN UNUSUAL PATTERN IN THE ARRANGEMENT OF THE SURROUNDING EPIDERMAL CELLS) AND TO PAPILLAE, WHICH ARE IRREGULARLY DISTRIBUTED ON THE ABAXIAL LEAF SURFACE. CORRELATIONS BETWEEN THE LEAF SURFACE FEATURES AND ENVIRONMENTAL FACTORS ARE DISCUSSED.

KEY WORDS:
SHADE LEAVES; RUDGEA; RUBIACEAE

RESUMO

SÃO APRESENTADOS DADOS RELATIVOS À MICROMORFOI.OGIA DA SUPERFÍCIE FOLIAR DE DUAS ESPÉCIES DE RUDGEA. O ESTUDO FOI REALIZADO EM INDIVÍDUOS QUE OCORREM NO INTERIOR DA FLORESTA PLUVIAL TROPICAL (MATA ATLÂNTICA). DESTACA-SE A OCORRÊNCIA DE CUTÍCULA LISA OU ESTRIADA, CERA EPICUTICUI.AR SEM ORNAMENTAÇÃO, ESTÔMATOS PARACÍTICOS E PARALELOCÍTICOS, SENDO ALGUNS DIFERENTES DO TIPO PADRÃO, E PAPILAS DISTRIBUÍDAS SOMENTE NA FACE ABAXIAL. A CORRELAÇÃO ENTRE AS CARACTERÍSTICAS DA SUPERFÍCIE FOI.IAR E FATORES AMBIENTAIS É DISCUTIDA.

PALAVRAS-CHAVES:
FOLHAS DE SOMBRA; RUDGEA; RUBIACEAE

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ACKNOWLEDGEMENTS

The authors are indebted to Heitor Monteiro Duarte, for his help taking the photos. The authors would like to thank Conselho Nacional de Pesquisa (CNPq), wich provided the research training grant (Nº 110828/92-5), awarded to the first author. Fundação Universitária José bonifácio (FUJB), and also Laboratório de Microscopia Eletrônica do Instituto de Biofísica (UFRJ).

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Publication Dates

  • Publication in this collection
    Jan-Dec 1993
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