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50 results for “Velloziaceae”
FIGURE 5 in Velloziaceae in honorem appellatae
FIGURE 5. Transversal section of leaf lamina. A. Vellozia everaldoi (Menezes 1001). B. Vellozia giuliettiae (Menezes 1207). C. Vellozia semirii (Mello-Silva 1769). D. Vellozia strangii (Mello-Silva 2492). Scale bars = 200 µm. AP = aquiferous parenchyma. En = endodermis. Hy = hypodermis. PC = passage cells. PF = pericyclic fibres. Ph = phloem. TT = transfusion tracheids.
FIGURE 3. Vellozia inselbergae. A–E in Vellozia inselbergae (Velloziaceae), a new species from the Brazilian Atlantic Forest inselbergs
FIGURE 3. Vellozia inselbergae. A–E. Cross section of median region of leaf. B. Detail of sclerified cell bundles in adaxial epidermis (black arrow). C. Furrow in the abaxial surface. D. Midrib. E. Fibro-vascular bundles in the lamina border. F. Leaf abaxial epidermis. G–H. Leaf adaxial epidermis, showing the rounded cluster of cells (black arrow). I–J. Pedicel cross-section, showing the fibro-vascular bundles (black arrow) and belt of sclerified cells (red arrow). Black bar scale = 50 μm; grey bar scale = 500 μm. Vouchers: A. Queiroz 3825. B–E and G–J. Mello-Silva 4040. F. Rapini 1043.
FIGURE 2. Vellozia inselbergae. A–B. Habit. C in Vellozia inselbergae (Velloziaceae), a new species from the Brazilian Atlantic Forest inselbergs
FIGURE 2. Vellozia inselbergae. A–B. Habit. C. Detail of hypanthium emergences. D. Sepal. E. Petal. F. Stigma. G. Longitudinal section of the flower, detailing the proximal region. H. Frontal view of the stamen attachment region. I. Lateral view of the stamen attachment region. J. Stamens. Voucher: Mello-Silva 4040.
FIGURE 1 in Vellozia inselbergae (Velloziaceae), a new species from the Brazilian Atlantic Forest inselbergs
FIGURE 1. Vellozia inselbergae (Mello-Silva 4040). A. Frontal view of the flower. B. Flower in longitudinal section. C–D. Lateral view of the flower, with detail of hypanthium emergences (D). E. Habit. F. Renato Mello-Silva collecting the holotype. Photographs by Renato Mello-Silva (A–E) and Jenifer C. Lopes (F).
Data from: Carbon assimilation and habitat segregation in resurrection plants: a comparison between desiccation- and non-desiccation-tolerant species of Neotropical Velloziaceae (Pandanales)
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Data from: Specialized roots of Velloziaceae weather quartzite rock while mobilizing phosphorus using carboxylates
1.Campos rupestres is an extremely phosphorus (P)‐impoverished rocky ecosystem in Brazil. Velloziaceae is an important plant family in this environment, and some species colonize exposed quartzite rock. However, we know virtually nothing about their root development and nutrient acquisition within the rock outcrops and their possible role in rock weathering and landscape formation. 2.We tested the hypothesis that Velloziaceae dissolve P from the rock, enhancing rock‐weathering. The study was carried out with two Barbacenia species (Velloziaceae) that colonize quartzite rocks. We assessed the root specializations and exudates, and determined the mineralogical composition of the rocks. 3.The quartzite rocks contained a low concentration of total P in a matrix composed predominantly of silica. Using transmission electron microscopy, we show root growth perpendicular to the rock‐bedding planes. A micro‐XRF setup at the XRF beamline of a synchrotron evidenced root‐associated rock dissolution. 4.The investigated roots show novel morphological and physiological specializations, coined vellozioid roots, which are highly effective at P acquisition. These carboxylate‐releasing roots function like others specialized roots in nutrient‐depleted soils. The rocks represent a barrier for most species, but due to their chemical and physical actions inside the rocks, vellozioid roots play a pivotal role in rock weathering, contributing to shaping the campos rupestres landscapes.
FIGURE 4 in Vellozia inselbergae (Velloziaceae), a new species from the Brazilian Atlantic Forest inselbergs
FIGURE 4. Distribution of Vellozia inselbergae through two lowland inselbergs in the Bahia state.
Data from: Specialized roots of Velloziaceae weather quartzite rock while mobilizing phosphorus using carboxylates
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FIGURE 3. A, C and E in Two new remarkable species of Barbacenia (Velloziaceae) from the Brazilian Espinhaço Range in honor of Renato Mello-Silva
FIGURE 3. A, C and E. Cross section of median region of leaf. B, D and F. Cross section of the leaf midrib. G, I and K. Leaf abaxial epidermis. H, J and L. Leaf adaxial epidermis. M–O. Pedicel cross-section. A–B, G–H and M. Barbacenia gentianoides (Menezes 229, except for M, for which Menezes 419 was used). C–D, I–J and N. Barbacenia glaucescens (Menezes 1395). E–F, K–L and O. Barbacenia mellosilvae (Pirani 5593). Black bar scale = 200 μm; grey bar scale = 100 μm.
FIGURE 3 in Two new critically endangered species of Vellozia (Velloziaceae) from the Campos Rupestres of Espinhaço Range, Brazil
FIGURE 3. Distribution of Vellozia flavida and V. formosa, restricted to the municipality of Monte Azul, Espinhaço Range, near the border of Minas Gerais (MG) and Bahia (BA) states.
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