Seed, seedling, tirodendro morphology and germination of Anadenanthera macrocarpa (Benth.) Brenan (Fabaceae, Mimosoideae)
ABSTRACT The specie Anadenanthera macrocarpa (Benth.) Brenan, angico-vermelho, is little studied regarding the morphological characters of its seeds, seedlings and tirodendo. Therefore, the aims of this study were to describe and illustrate the morphology of seed germination, seedling and tirodendro...
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Published in: | Hoehnea Vol. 47 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
Published: |
Instituto de Pesquisas Ambientais
2020
Instituto de Botânica |
Subjects: | |
Online Access: | Get full text |
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Summary: | ABSTRACT The specie Anadenanthera macrocarpa (Benth.) Brenan, angico-vermelho, is little studied regarding the morphological characters of its seeds, seedlings and tirodendo. Therefore, the aims of this study were to describe and illustrate the morphology of seed germination, seedling and tirodendro of angico-vermelho. Seeds of five matrices were harvested and submitted to germination test at 28 °C on paper roll and vermiculite substrates. The seeds are euryspermics with horseshoe-shaped pleurograma and seedlings epigeal-phanerocotylar. The seedling eophylls are compound, bi-pinnate, opposite, oblong-shape laminar and based asymmetric. Petiole has reddish oval gland at the beginning, and two to three rounded glands between the last pinnae. Eophylls and metaphylls have similar morphological characteristics, except for the pinnae number. The tirodendro presents metaphylls compounds bi-pinnate opposite, with gradual hypertrophy of the taproot 27th day after sowing, the xylopodium, that becames larger until 180 days.
RESUMO A espécie Anadenanthera macrocarpa (Benth.) Brenan, angico-vermelho, é pouco estudada quanto aos caracteres morfológicos de suas sementes, mudas e tirodendo. Portanto, os objetivos deste estudo foram descrever e ilustrar a morfologia da germinação de sementes, plântulas e tirodendros de angico-vermelho. Sementes de cinco matrizes foram colhidas e submetidas ao teste de germinação a 28 °C em rolo de papel e substratos de vermiculita. As sementes são euripermicas com pleurograma em forma de ferradura e mudas epigeal-fanerocotilares. Os eofilos das mudas são compostos, bi-pinados, opostos, laminados de forma oblonga e baseados assimétricos. O pecíolo possui glândula oval avermelhada no início e duas a três glândulas arredondadas entre as últimas pinças. Eofilos e metafilos têm características morfológicas semelhantes, exceto pelo número de pinos. O tirodendro apresenta compostos metafílicos bipinados opostos, com hipertrofia gradual da raiz principal 27 dias após a semeadura, o xilopódio, que aumenta até 180 dias. |
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ISSN: | 0073-2877 2236-8906 2236-8906 |
DOI: | 10.1590/2236-8906-59/2020 |