Leaf morphology and anatomy of Jacquinia armillaris Jacq. (Primulaceae) from two coastal Restinga environments

Vinícius Coelho Kuster, Luzimar Campos da Silva, Lucélia Possatti, Solange Zanotti Schneider

Resumo


Jacquinia armillaris occurs in post-beach and rocky outcrops environments, which led to hypothesize that they are morphological and anatomical plasticity in its leaves to inhabit these two coastal formations. Anatomical, histochemical and micromorphometric analyzes were performed to understand the leaf plasticity. The leaf lamina is dorsiventral and hypostomatic, with glandular trichomes. The epidermis is uniseriate, possesses anomocytic stomata and is covered by a thick cuticle and epicuticular wax. The post-beach formation plants had the higher stomatal index and greater stomatal density, however, there are higher leaf size and glandular trichomes density in the rocky outcrop plants. The glandular trichomes are similar in structure to salt glands and may serve to reduce the impact of the local salinity. At fi rst, the two environments present typical coastal environmental conditions, however, specifi c local characteristics were suffi  cient to trigger anatomic and morphologic plasticity, particularly associated with the distribution of stomata and leaf size.

Palavras-chave


trichome, post-beach formation, rocky outcrops

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A revista Iheringa, Série Botânica está aberta à submissão de manuscritos. No entanto, alertamos que a Fundação Zoobotânica do Rio Grande do Sul encontra-se sob ameaça de extinção pelo PL n° 246/16 encaminhado e aprovado na Assembleia Legislativa, o que poderá comprometer a publicação dos artigos.

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Corpo Editorial.

 

Dear Researchers,

The magazine Iheringia, Série Botânica is open to submit manuscript. However, we warn that the Zoobotanical Foundation of Rio Grande do Sul is under threat of extinction by PL no. 246/16 sent and approved in the Legislative Assembly, we were obliged to temporarily interrupt the receipt of manuscripts to the Journal.

Yours sincerely,

Editorial Board.


ISSN: 2446-8231

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