Comparative analysis of the leaf anatomy in two Parodiolyra species (Poaceae: Olyreae) occurring on forests in Eastern Brazil

Jesús, Luis; Oliveira, Reyjane Patrícia de; Leite, Kelly Regina Batista; Silva, L B

doi:10.1590/s1519-69842012000100025

Cited by 14 publications

(3 citation statements)

References 9 publications

(17 reference statements)

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“…Long cells, short intercostal cells, and silicified cells were observed for the genre ( Figure 3A, 3B, 3C, 3D), as described by Ellis (1979) and registered to other species of Poaceae by Jesus Junior et al (2012).…”

Section: Resultssupporting

confidence: 62%

Death of pastures syndrome: tissue changes in Urochloa hybrida cv. Mulato II and Urochloa brizantha cv. Marandu

2017

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The quality of forage production is a prerequisite to raising livestock. Therefore, income losses in this activity, primarily cattle raising, can result in the impossibility of economic activity. Through the qualitative and quantitative anatomical study of Urochloa hybrida cv. Mulato II and U. brizantha cv. Marandu, we searched for descriptions and compared changes in the individual vegetative body from populations with death syndrome pastures (DPS). Specimens were collected at different physiological stages from farms in northern Mato Grosso. After collection, the individuals were fixed in FAA 50 and stored in 70% alcohol. Histological slides were prepared from the middle third of the sections of roots, rhizomes, and leaves, and the proportions and characteristics of tissues were evaluated in healthy, intermediate, and advanced stages of DPS. Changes were compared between cultivars. With the advancement of the syndrome, the following changes were observed: a more marked decrease in the length of roots in U. hybrida; disorganization of the cortical region of the roots and rhizome cultivars; fungal hyphae in roots and aerenchyma formation in U. hybrida; a decrease in sclerenchyma fiber proportions in roots and leaves; sclerification of the epidermis of U. brizantha rhizomes; and an increase in pericyclic fibers in U. hybrida. Furthermore, there was a decrease in the volume of epidermal cells of the abaxial face of the leaves of both cultivars, with a greater reduction in U. hybrida; a gradual decrease in thickness in the midrib of leaves similar to leaf mesophyll; conduction system obstructions; partial or total cell lysis in roots and rhizomes affected by the syndrome. Obstructions in sieve tube element and companion cells, and sometimes obstruction in xylem vessel elements. The evolution of DPS in cultivars was similar, but there were variations, arising probably from the physiological response to stress, such as aerenchyma formation in the root and increased pericycle in the rhizome of U. hybrida.Keywords: forage, plant anatomy, fungal hyphae. Síndrome da morte das pastagens: Alterações teciduais em Urochloa hybrida cv. Mulato II e Urochloa brizantha cv. Marandu ResumoA produção de forragem de qualidade é um pressuposto indispensável à atividade pecuária moderna. Dessa forma, perdas de rendimento nesta atividade preliminar à criação bovina, podem inviabilizar esta atividade econômica. Através de estudos anatômicos qualitativos e quantitativos em Urochloa hybrida cv. Mulato II e U. brizantha cv. Marandu buscou-se descrever e comparar as alterações do corpo vegetativo de indivíduos de populações que apresentam síndrome da morte das pastagens (SMP). Foram coletados indivíduos em estádios morfológicos distintos em propriedades rurais no norte de Mato Grosso, Amazônia Meridional. Após a coleta, os indivíduos foram fixados em FAA 50 e armazenados em álcool 70%. Lâminas histológicas foram confeccionadas a partir de secções do terço médio de raízes, rizomas e folhas, onde foram avaliadas as características e p...

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Section: Resultssupporting

confidence: 62%

Death of pastures syndrome: tissue changes in Urochloa hybrida cv. Mulato II and Urochloa brizantha cv. Marandu

2017

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“…The studies made over the last decade have shown that the anatomy of the root, stalk and specially leaves, are consistent for the infra-generic or genus separation (Jesus Junior et al, 2012;Gomes et al, 2009;Lusa and Bona, 2009), especially for Papilionoideae (Teixeira and Gabrielli, 2006;Sartori and Tozzi, 2002;Crow et al, 1997). The anatomy is also applied in the interpretation of the phenotype plasticity in amphibious species located in lagoons and wetlands of Pantanal (Scremin-Dias, 1999;Scremin-Dias et al, 2011).…”

Section: Introductionmentioning

confidence: 96%

Ecological interpretations of the leaf anatomy of amphibious species of Aeschynomene L. (Leguminosae - Papilionoideae)

Leme¹,

Scremin-Dias²

2014

Braz. J. Biol.

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We present the leaf anatomy of seven amphibious species of Aeschynomene L. (Papilionoideae, Leguminosae), interpreting their structures and ecological functions, and also, providing information on which their taxonomy can be based, especially of morphologically similar species. We evaluated Aeschynomene americana, A. ciliata, A. evenia, A. denticulata, A. fluminensis, A. rudis and A. sensitiva. The anatomy corroborates the separation of the series Americanae, Fluminenses, Indicae and Sensitivae, with the shape of the petiole, types of trichomes and quantity of vascular units in the petiole as main characteristics to delimit the species. The petiole shape varies from cylindric in A. americana, A. sensitiva and A. fluminensis, to triangular in A. evenia and quadrangular in A. rudis, A. denticulata and A. ciliata. We observed four types of trichomes: hydathode trichome, long conic trichome, short conic trichome and bulb-based trichome. The hydathode trichome was the most common, except for A. americana and A. fluminensis. Species with higher affinity with water share similar adaptive characteristics, including hydathode trichomes described for the first time for the genus. This article adds unseen descriptions for the genus and on the adaptation factors of the amphibious species.Keywords: macrophytes, Fabaceae, hydathode trichome. Interpretações ecológicas da anatomia foliar de espécies anfíbias deAeschynomene L. (Leguminosae -Papilionoideae) ResumoNeste trabalho é apresentada a anatomia foliar de sete espécies anfíbias de Aeschynomene L., interpretando estruturas e suas funções ecológicas e fornecendo informações que subsidiam sua taxonomia, principalmente de espécies semelhantes morfologicamente. Foram avaliadas Aeschynomene americana, A. ciliata, A. evenia, A. denticulata, A. Palavras-chave: macrófitas, Fabaceae, tricoma-hidatódio.

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“…The strongly similar morphological features of Luziola species in the vegetative stage raised the need for systematic and phylogenetic studies to the genus (Martinez-y-Perez et al 2006a, b, 2008. Although surveys of anatomy of the leaf blade have revealed the utility of features in the delimitation of Poaceae (e.g., Metcalfe 1960;Tateoka 1963;Vieira et al 2002;Guglieri et al 2008;Pelegrin et al 2009;Jesus-Junior et al 2012), there is a dearth of information particularly among morphologically similar grasses in the vegetative stage.…”

Section: Introductionmentioning

confidence: 99%

Micromorphology and anatomy of the leaf blade: a contribution to the taxonomy of Luziola (Poaceae, Oryzoideae) from the Pantanal, Brazil

2015

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Luziola comprises nine monoecious, aquatic species and has its center of diversity in South America. Due to the morphological similarities among Luziola species in the vegetative stage, the micromorphology and anatomy of the leaf blade of five Luziola species were studied to survey potentially useful features for taxon identification. Oryzoid silica bodies; silicified unicellular trichomes with a rounded apex; stomata in furrows on the adaxial surface; a complex midrib consisting of at least two vascular bundles; superposed vascular bundles in the mesophyll; and fusoid cells are features shared by some of these species. Conversely, features unique to a single species include: vertically elongated epidermal cells surrounding pointed unicellular trichomes, flat midrib and leaf margin dimorphism (L. fragilis), and an obtuse leaf blade margin (L. subintegra). L. spruceana and L. subintegra show the greatest micromorphological and anatomical affinity among the five species herein studied, and L. fragilis has the greatest number of unique features. All species are recognized by the structure of the midrib, a strong feature for the identification of taxa within Luziola. A key for the identification of the studied species is presented based on the leaf blade features.

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Comparative analysis of the leaf anatomy in two Parodiolyra species (Poaceae: Olyreae) occurring on forests in Eastern Brazil

Cited by 14 publications

References 9 publications

Death of pastures syndrome: tissue changes in Urochloa hybrida cv. Mulato II and Urochloa brizantha cv. Marandu

Death of pastures syndrome: tissue changes in Urochloa hybrida cv. Mulato II and Urochloa brizantha cv. Marandu

Ecological interpretations of the leaf anatomy of amphibious species of Aeschynomene L. (Leguminosae - Papilionoideae)

Micromorphology and anatomy of the leaf blade: a contribution to the taxonomy of Luziola (Poaceae, Oryzoideae) from the Pantanal, Brazil

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