Leaf Anatomy in Sansevieria (Agavaceae)

Koller, Alan L.; Rost, Thomas L.

doi:10.2307/2444196

Cited by 20 publications

(13 citation statements)

References 16 publications

(27 reference statements)

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“…These features help to retain water in the leaf lamina and probably increase the space for water storage and transport (Tomlinson 2003;Lima 2010;Eller et al 2016). These anatomical features are well developed in plants that undergo cyclical dry seasons (Koller & Rost 1988;Scatena & Menezes 1996); because the water is stored mainly in vacuoles, the larger the number of large cells with vacuoles, the larger the spaces for storing water and hence the higher the C max . The large tracheids in vascular endings, which can act as 'water tanks' (Tucker 1964;Lersten & Carvey 1974) observed in E. erythropappus have also been reported in Chamaecrista dentata and C. hedysaroides (Francino 2010).…”

Section: Discussionmentioning

confidence: 99%

Strategies of leaf water uptake based on anatomical traits

et al. 2018

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The ability of leaves to absorb fog water can positively contribute to the water and carbon balance of plants in montane ecosystems, especially in periods of soil water deficit. However, the ecophysiological traits and mechanisms responsible for variations in the speed and total water absorption capacity of leaves are still poorly known. This study investigated leaf anatomical attributes of seven species occurring in seasonal tropical high-altitude ecosystems (rocky outcrop and forest), which could explain differences in leaf water uptake (LWU) capacities. We tested the hypothesis that different sets of anatomical leaf attributes will be more marked in plant individuals living under these contrasting environmental conditions. Anatomical variations will affect the initial rate of water absorption and the total storage capacity, resulting in different strategies for using the water supplied by fog events. Water absorption by leaves was inferred indirectly, based on leaf anatomical structure and visual observation of the main access routes (using an apoplastic marker), the diffusion of water through the cuticle, and non-glandular or glandular trichomes in all species. The results suggest that three LWU strategies coexist in the species studied. The different anatomical patterns influenced the speed and maximum LWU capacity. The three LWU strategies can provide different adaptive advantages to adjust to temporal and spatial variations of water availability in these tropical high-altitude environments.

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Section: Discussionmentioning

confidence: 99%

Strategies of leaf water uptake based on anatomical traits

et al. 2018

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“…13) (Mansfeld, 2015). Both species have soft, flat leaves without wall bands in water-storage (Koller and Rost, 1988) and without cuticular rims around stomata (Klimko et al, unpublished results). Unlike other morphological characters, the pollen grains of these two species are various in the exine ornamentation on the proximal surface: microreticulate in S. dooneri and psilate-perforate in S. parva.…”

Section: Discussionmentioning

confidence: 99%

Pollen Morphology of Some Species of the Genus Sansevieria Petagna (Asparagaceae)

Klimko¹,

Nowińska²,

Wilkin³

et al. 2017

Acta Biologica Cracoviensia S. Botanica

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Pollen grains of 15 species of the genus Sansevieria were examined using light and scanning electron microscopy. The pollen grains were single, but dyads were also found. The basic shape of the pollen grains (with chemical treatment) was subprolate, prolate and prolate-spheroidal and the pollen grains were large (> 50 mm). The pollen grains observed in SEM were prolate-spheroidal, subprolate, prolate and perprolate. The aperture occupied nearly the entire distal hemisphere. The surface of non-apertural areas was microreticulate, psilate-perforate, fossulate and verrucate. The surface of the apertural area was psilate-perforate-verrucate, microreticulate-verrucategemmate and psilate-perforate. The tectum was homogeneous, with perforations. Our results suggest that some species cannot be separated based on pollen grain morphology, but only may be categorized into their groups. The present study investigated pollen grain morphology in eleven species for the first time in terms of pollen micromorphology and provided some important new data.

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“…Ruhland (Tomlinson 1969). A presença de parênquima aqüífero em plantas de ambiente seco, associada com outras características xeromórficas, lhes permite o armazenamento de água, segundo Koller & Rost (1988) e Scatena & Menezes (1996a).…”

Section: Eulepisunclassified

Anatomia de escapos, folhas e brácteas de Syngonanthus sect. Eulepis (Bong. ex Koern.) Ruhland (Eriocaulaceae)

2004

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RESUMO -(Anatomia de escapos, folhas e brácteas de Syngonanthus sect. Eulepis (Bong. ex Koern.) Ruhland (Eriocaulaceae)). Estudou-se a anatomia de escapos, folhas e brácteas de 24 espécimes de Syngonanthus sect. Eulepis, que ocorrem nos campos rupestres do Brasil. Os escapos apresentam número variado de costelas, epiderme unisseriada, com células de paredes totalmente espessadas; córtex com esclerênquima e parênquima clorofiliano alternados; endoderme contínua ou descontínua; periciclo estrelado; feixes vasculares colaterais; medula com células de paredes finas ou espessadas. As folhas e as brácteas apresentam epiderme com células de paredes total ou parcialmente espessadas, estômatos na face abaxial, margem com parênquima clorofiliano ou esclerênquima; mesofilo com hipoderme constituída de esclerênquima ou parênquima aqüífero, feixes vasculares colaterais envolvidos externamente pela endoderme e internamente pelo periciclo. Escapos, folhas e brácteas de Syngonanthus sect. Eulepis apresentam células com paredes espessadas e grande quantidade de esclerênquima, provavelmente como resposta adaptativa dessas plantas ao vento e à radiação excessiva comum nos campos rupestres. Epiderme com células de paredes espessadas, estômatos com câmara subestomática não especializada, presença de hipoderme, esclerênquima, e parênquima clorofiliano compacto, caracterizam anatomicamente escapos, folhas e brácteas de Syngonanthus sect. Eulepis. No geral, os caracteres anatômicos não são consistentes para separar os táxons dentro da seção. Palavras-chave: Eriocaulaceae, estrutura anatômica, SyngonanthusABSTRACT -(Anatomy of scapes, leaves, and bracts of Syngonanthus sect. Eulepis (Bong. ex Koern.) Ruhland (Eriocaulaceae)). The anatomy of scapes leaves and bracts of twenty four taxa included in Syngonanthus sect. Eulepis (Bong. ex Koern.) Ruhland from the Brazilian "campos rupestres" was studied. Scapes present a vary number of ribs, thick-walled uniseriate epidermal cells, alternate sclerenchyma, and chlorenchyma in the cortex, continuous or discontinuous endodermis, star-shaped pericycle, collateral vascular bundles, and pith with thin or thick-walled cells. Leaves and bracts have total or partial thick-walled epidermal cells, stomata on the abaxial surface, margins with chlorenchyma or sclerenchyma under the epidermis, mesophyll with hypodermis formed by sclerenchyma or aqüiferous parenchyma, and collateral vascular bundles with a double sheath: the external one, the endodermis, and the internal one, the pericycle. Thick-walled cells and sclerenchyma in the scapes, leaves, and bracts present in the species of Syngonanthus sect. Eulepis are probably a response to the typical windy and bright environment of the "campos rupestres". Features such as thick-walled epidermal cells, non-specialized substomatal chamber, presence of hypodemis, sclerenchyma, and compact chlorenchyma are typical of the Syngonanthus sect. Eulepis species. These anatomical features could be used to define the taxa in the section.

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Leaf Anatomy in Sansevieria (Agavaceae)

Cited by 20 publications

References 16 publications

Strategies of leaf water uptake based on anatomical traits

Strategies of leaf water uptake based on anatomical traits

Pollen Morphology of Some Species of the Genus Sansevieria Petagna (Asparagaceae)

Anatomia de escapos, folhas e brácteas de Syngonanthus sect. Eulepis (Bong. ex Koern.) Ruhland (Eriocaulaceae)

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