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    <subfield code="a">Hartmann, Leonardo da Silva </subfield>
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    <subfield code="a">Rodrigues, Rodrigo Sch&#xFC;tz </subfield>
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    <subfield code="a">Morfologia de pl&#xE2;ntulas de Martiodendron excelsum e sua relev&#xE2;ncia sistem&#xE1;tica em Dialiinae (Leguminosae, &#x201C;Caesalpinioideae&#x201D;)</subfield>
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Resumo

Martiodendron Gleason &#xE9; um g&#xEA;nero sul-americano com cinco esp&#xE9;cies arb&#xF3;reas, subordinado &#xE0; Dialiinae
(tribo Cassieae). Dialiinae apresenta 17 g&#xEA;neros, que formam um clado cujas rela&#xE7;&#xF5;es gen&#xE9;ricas permanecem
em grande parte n&#xE3;o definidas. Este trabalho descreve e ilustra o desenvolvimento e a morfologia de pl&#xE2;ntulas
de Martiodendron excelsum e avalia, por meio de uma revis&#xE3;o, a relev&#xE2;ncia sistem&#xE1;tica dos atributos de
pl&#xE2;ntulas em n&#xED;vel de g&#xEA;nero em Dialiinae. Sementes de M. excelsum foram coletadas de popula&#xE7;&#xF5;es em
&#xE1;reas de mata ciliar no Estado de Roraima, Brasil. Martiodendron excelsum tem pl&#xE2;ntulas fanero-ep&#xED;geoarmazenadoras, 
eofilos estipulados e 1-foliolados nos tr&#xEA;s primeiros n&#xF3;s. Os dados sobre morfologia de
pl&#xE2;ntulas s&#xE3;o potencialmente &#xFA;teis para diagnosticar g&#xEA;neros em Dialiinae, visto que Martiodendron e todos os
demais g&#xEA;neros podem ser distintos entre si pela a varia&#xE7;&#xE3;o no grupo morfol&#xF3;gico de pl&#xE2;ntulas, na filotaxia e
n&#xFA;mero de fol&#xED;olos no primeiro e segundo eofilos, nas rela&#xE7;&#xF5;es entre o comprimento e largura dos cotil&#xE9;dones
e entre o comprimento do hipoc&#xF3;tilo e epic&#xF3;tilo e no alongamento do primeiro entren&#xF3; eofilar. Por fim, em
Leguminosae, a predomin&#xE2;ncia de eofilos 1-foliolados na maior parte dos g&#xEA;neros de Dialiinae &#xE9; somente
compar&#xE1;vel &#xE0; encontrada entre as pl&#xE2;ntulas de t&#xE1;xons de Papilionoideae.

Palavras-chave: Cassieae, desenvolvimento p&#xF3;s-seminal, Roraima, taxonomia.





Abstract

Martiodendron Gleason is a South American genus with five species of trees, belonging to the tribe Cassieae,
subtribe Dialiinae (Leguminosae, &#x201C;Caesalpinioideae&#x201D;). Dialiinae has 17 genera that form a clade whose generic
relationships are not highly resolved. This paper describes and illustrates the early development and seedling
morphology of Martiodendron excelsum. We review the current state of knowledge of seedling morphology in
Dialiinae, in order to evaluate its systematic relevance at a generic level. Seeds of M. excelsum were collected
from wild populations in Roraima State, Brazil. Martiodendronexcelsum has phanerocotylar, epigeal seedlings
with storage cotyledons, with stipulate and 1-foliolate eophylls at the first three nodes. Seedling morphology
data are potentially useful for diagnosing genera in Dialiinae. Martiodendron and all other remaining genera
can be distinguished from each other by the variation in seedling morphological groups, as well as lengthwidth 
ratio of cotyledons, phyllotaxis and leaflet number of the first and second eophylls, ratio of hypocotyl
length to epicotyl length, and elongation of the first eophyllar internode. In addition, within Leguminosae,
the predominance of 1-foliolate eophylls in most genera of Dialiinae is only comparable among seedlings
of Papilionoideae taxa.

Key words: Cassieae, post-seminal development, Roraima, taxonomy.</subfield>
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    <subfield code="a">TAXONOMIA</subfield>
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    <subfield code="a">MORFOLOGIA VEGETAL</subfield>
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    <subfield code="a">RORAIMA</subfield>
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    <subfield code="9">348749</subfield>
    <subfield code="d">Rio de Janeiro-RJ Jardim Botanico do Rio de Janeiro 1935</subfield>
    <subfield code="o">2025-1242</subfield>
    <subfield code="t">Rodrigu&#xE9;sia (Brazil)</subfield>
    <subfield code="x">0370-6583; 2175-7860 on-line</subfield>
    <subfield code="g">v. 65(3) p. 577-586; (2014)</subfield>
    <subfield code="w">BR2024004915</subfield>
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