Seedling Diversity and the Homologies of Seedling Organs in the Order Poales (Monocotyledons)

Tillich, H.‐J.

doi:10.1093/aob/mcm238

Cited by 78 publications

(98 citation statements)

References 39 publications

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“…Seeds of study species showed hypogeal germination, the same one found in other species of Smilacaceae (Tillich 2007), and cryptocotylar, with the formation of hyaline cataphylls, as described by Duke (1965).…”

Section: Discussionsupporting

confidence: 78%

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Germination and seedling morphology of four South American <i>Smilax</i> (Smilacaceae).

Martins

Soares

Bombo

et al. 2012

RBT

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Species of Smilax, also known as greenbrier, are widely distributed in Brazil and their commercial trades are carried out by the extractivism of native species. We the aim to provide information about the germination and development of seedlings in four Smilax species, different experiments were developed under controlled conditions. We evaluated two germination treatments: temperature (30ºC and 20-30ºC) and light (presence/ absence), and for few cases the tetrazolium treatment was applied. A different treatment response was observed among the studied species. Light had a significant influence in S. brasiliensis, with the highest germination rates at 20-30ºC in dark conditions. S. campestris showed significant differences among temperature treatments, but not to light; while S. cissoides showed high germination rates (66-78%), independently of treatment. However, S. polyantha had low germination rates (19-24%). After one year, the expanded leaves showed different characteristics among the studied species. Leaves of S. brasiliensis were ovate, coriaceous, three main veins and prickle-like structures only on the midrib on abaxial face. S. campestris leaves were oblong, coriaceous and prickle-like structures were located at the leaf midrib and margin. S. cissoides had ovate-elliptic, membranaceous leaves, with three main veins with prickle-like structures on the abaxial face. S. polyantha leaves showed ovateelliptic, coriaceous leaves, with three main veins, translucent secondary veins and no prickle-like structures. A seedling identification key was elaborated based on morphological characteristics. Rev. Biol. Trop. 60 (1): 495-504. Epub 2012 March 01.

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Section: Discussionsupporting

confidence: 78%

“…Unfortunately, the literature contains many superficial seedling descriptions, together with an inexact and often incorrect or misleading terminology (Tillich 2007). There is a lack of studies about the morphology of seedlings of Smilacaceae family.…”

mentioning

confidence: 99%

Germination and seedling morphology of four South American <i>Smilax</i> (Smilacaceae).

Martins

Soares

Bombo

et al. 2012

RBT

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“…No estudo, acredita-se que o cotilédone das espécies estudadas pode ser dividido em três regiões: escutelo, também denominado de hiperfilo ou haustro (Tillich 1995;2000;2007) que é a porção distal do cotilédone e apresenta função de absorção de nutrientes do endosperma (Tillich 2000;2007); bainha reduzida; e coleóptilo, que é a porção inferior do cotilédone, também denominado de hipofilo (Tillich 2007).…”

Section: Discussionunclassified

“…O autor afirmou que Poaceae não apresenta radícula e que a coleorriza é a região inferior do hipocótilo (colar). Tillich (2007) registrou ainda que epiblasto é uma excrescência da coleorriza e coleóptilo é uma bainha cotiledonar modificada (Tillich 2007).…”

Section: Introductionunclassified

Desenvolvimento pós-seminal de espécies de Poaceae (Poales)

Nakamura

Scatena

2009

Acta Bot. Bras.

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RESUMO -(Desenvolvimento pós-seminal de espécies de Poaceae (Poales)). O presente estudo objetivou verificar a existência de um padrão do desenvolvimento pós-seminal em Poaceae. Para tanto, foram estudadas as seguintes espécies: Olyra humilis Nees (Bambusoideae); Axonopus aureus P. Beauv. e Paspalum polyphyllum Nees ex Trin. (Panicoideae); Chloris elata Nees e Eragrostis solida Desv. (Chloridoideae). Procurou-se também comparar as estruturas da plântula de Poaceae com as demais monocotiledôneas. As espécies estudadas são plantas perenes, rizomatosas, cespitosas e apresentam cariopses de tamanhos diferentes. Apresentam sementes albuminosas; embrião lateral, diferenciado, com raiz endógena (adventícia); cotilédone dividido em hiperfilo (escutelo), bainha reduzida e hipofilo (coleóptilo); coleorriza (raiz primária reduzida) e mesocótilo (eixo localizado entre o escutelo e coleóptilo). A presença de epiblasto (folha embrionária) foi observada em Olyra humilis, Chloris elata e Eragrostis solida. O desenvolvimento pós-seminal é semelhante nas espécies estudadas e forma um padrão em Poaceae. Primeiramente, observa-se a emissão da coleorriza, que cresce no sentido geotrópico positivo, seguida do coleóptilo e plúmula que crescem em sentido contrário, a partir do desenvolvimento do mesocótilo. As primeiras folhas são semelhantes às folhas definitivas (metafilos) das espécies, exceto em Olyra humilis, que são modificadas em catafilos e podem ser interpretadas como caráter basal em Bambusoideae. Raiz primária reduzida (coleorriza) e hipofilo modificado em coleóptilo são considerados caracteres derivados em Poaceae, quando comparados com as demais monocotiledôneas.Palavras-chave: anatomia, Gramineae, morfologia, plântula, semente ABSTRACT -(Post-seminal development of Poaceae species (Poales)). This work has aimed to verify the existence of a pattern of the post-seminal development in Poaceae. Thus, Olyra humilis Nees (Bambusoideae); Axonopus aureus P. Beauv. e Paspalum polyphyllum Nees ex Trin. (Panicoideae); Chloris elata Nees e Eragrostis solida Desv. (Chloridoideae) have been studied. Besides, it was compared the structures of Poaceae seedlings with those of other monocotyledons. All are perennial, rhizomatous, and cespitous species whose caryopses differ in size. They all present albuminous seeds, lateral and differentiated embryos, with endogenous embryonic (adventitious) root, cotyledons divided into hyperphyll (scutellum), reduced sheath and hypophyll (coleoptile); coleorhiza (reduced primary root); and mesocotyl (axis between the scutellum and the coleoptile). The presence of epiblasts (embryonic leaves) was noticed in Olyra humilis, Chloris elata and Eragrostis solida. Since the post-seminal developmental of all the studied species is similar, it represents a pattern in Poeaceae. The coleorhiza, which shows positive geotropism, grows first, followed by the coleoptile and the plumule, in the opposite direction, which form from the mesocotyl development. In all species, the first leaves are similar to the definitive ...

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“…The morphology of the vegetative organs was registered through photographs and botanical illustrations. The morphology of the seedlings was described according to Tillich (2007).…”

Section: Morphology and Anatomymentioning

confidence: 99%

Seed germination and seedling morphology of Smilax polyantha (Smilacaceae)

et al. 2011

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Seed germination and seedling morphology of Smilax polyantha (Smilacaceae). Biota Neotrop. 11(2): http:// www.biotaneotropica.org.br/v11n2/en/abstract?article+bn00411022011 Abstract: Brazilians have been using the underground organs of Smilax species in alternative medicine since the 19 th century because of their anti-rheumatic qualities. However, even nowadays, these species are explored only by extractivism. Studies on seed germination and development of these organs could be useful to preserve these plants. After germination, seedling development of Smilax polyantha was analyzed to understand underground stem formation. Furthermore, to analyze the ontogenesis of the underground system, seedlings aged from one to twelve months were sectioned. One of the most striking features of this species is the presence of two stem branching systems. The plumule gives rise to the first stem branching system with negative geotropism. Its first underground axillary bud sprouted into the other caulinar axis with positive geotropism. The horizontal growth and the subsequent thickening of this underground organ depended on the development of axillary buds from basal nodes of the previous branches. The cotyledonary bud did not play a role in the underground formation, as previously described in the literature for this genus, but the buds of the basal cataphylls built the second stem branching system. In this study we discuss the terminology and suggest calling this second stem branching system a rhizophore. Keywords: anatomy, development, greenbrier, rhizome, rhizophores. MARTINS, A.R., PÜTZ, N., NOVEMBRE, A.D.L.C., PIEDADE, S.M.S. & APPEZZATO-DA-GLÓRIA, B. Germinação e morfologia de plântulas de Smilax polyantha (Smilacaceae). Biota Neotrop. 11(2): http://www. biotaneotropica.org.br/v11n2/pt/abstract?article+bn00411022011Resumo: As espécies de Smilax L. são utilizadas na medicina popular brasileira desde o século 19 devido às propriedades anti-reumáticas atribuídas aos órgãos subterrâneos de todas as espécies. No entanto, ainda hoje, essas espécies são exploradas apenas por extrativismo. Estudos sobre a germinação e o desenvolvimento dos órgãos subterrâneos podem ser úteis para preservar essas plantas. Após a germinação, o desenvolvimento de plântulas de Smilax polyantha foi analisado para compreender a formação do sistema subterrâneo. Para a análise da ontogênese do sistema subterrâneo foram seccionadas plantas em diferentes estágios de desenvolvimento entre um e doze meses. Uma das características mais marcantes desta espécie é a presença de dois sistemas de ramificação caulinar. A plúmula dá origem ao primeiro sistema caulinar de ramificações com geotropismo negativo. As gemas axilares subterrâneas desse primeiro eixo caulinar originam o segundo eixo caulinar com geotropismo positivo. O crescimento horizontal e o espessamento do órgão subterrâneo dependem do desenvolvimento de gemas axilares de nós basais dos ramos anteriores. A gema cotiledonar não participa da formação do caule subterrâneo, como descrito anteriormente na ...

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Seedling Diversity and the Homologies of Seedling Organs in the Order Poales (Monocotyledons)

Cited by 78 publications

References 39 publications

Germination and seedling morphology of four South American <i>Smilax</i> (Smilacaceae).

Germination and seedling morphology of four South American <i>Smilax</i> (Smilacaceae).

Desenvolvimento pós-seminal de espécies de Poaceae (Poales)

Seed germination and seedling morphology of Smilax polyantha (Smilacaceae)

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