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Pollen Morphology of Egyptian Geraniaceae: An Assessment of Taxonomic Value  [PDF]
Azza A. Shehata
International Journal of Botany , 2008,
Abstract: Pollen morphology of sixteen species including two subspecies and representing four genera: Geranium L., Erodium L., Monsonia L. and Pelargonium L′ Hér. of Geraniaceae in Egypt were investigated by the aid of light and scanning electron microscopy. The study showed that pollen grains were radially symmetrical, isopolar, prolate spheroidal to oblate spheroidal, tricolp (ate) orate. Tectum was generally striate/reticulate, reticulate/gemmate or reticulate. On the basis of pollen morphological characters, principally aperture types and exine sculpture, pollen grains were separated into three types and three subtypes representing different taxonomic categories. A key to the different pollen types and subtypes was provided. The results demonstrated that pollen morphological characters, as pollen shape, size, aperture characters as well as exine sculpture and structure, were taxonomically significant at the generic level and to some extent at the specific level. Moreover, the results confirmed the eurypalynous nature of the family.
California, a new genus of Geraniaceae endemic to the southwest of North America  [cached]
Aedo, Carlos,Saez, Lloren?,Vargas, Pablo,Navarro, Carmen
Anales del Jardín Botánico de Madrid , 2001,
Abstract: Morphological data provide evidence for the separation of Erodium macrophyllum Hook. & Arn. in a new genus, different from either Erodium and Monsonia (Geraniaceae). Also cpDNA sequence data (rrnL-F) support this view. Thus, we propose the recognition of a new monotypic genus, California Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo, to better reflect phylogenetic relationships in Geraniaceae. We provide diagnosis, illustrations, comparative analysis of distinctive characters, and a key to genera of Geraniaceae. The new combination proposed is: California macrophylla (Hook. & Am.) Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo, comb. Nov. [basion.: Erodium macrophyllum Hook. & Am.]; and two lectotypes are designed. Los datos morfol6gicos permiten distinguir, a nivel de genero, Erodium macrophyllum Hook. & Am. de las especies incluidas en Erodium y Monsonia (Geraniaceae). También los datos obtenidos de la secuencia de ADN cloroplástico (trnL-F) apoyan estas diferencias. Por lo tanto, proponemos un nuevo genero monotípico, California Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo, para que queden mejor reflejadas las relaciones filogenéticas en la clasificación de las Geraniaceae. Incluimos una diagnosis, ilustraciones, análisis comparativos de los caracteres diferenciales y una clave de géneros de Geraniaceae. Se propone una nueva combinaci6n: California macrophylla (Hook. & Am.) Aldas., C. Navarro, P. Vargas, Ll. Sáez & Aedo, comb, nov. [basión.: Erodium macrophyllum Hook. & Am.]; y se designan dos lectótipos
Anatomy and morphology of bracts and bracteoles in order Brassicales  [PDF]
Viktoria E. Kharchenko,Ekaterina S. Berezenko
Modern Phytomorphology , 2012,
Abstract: The results of comparisons of the anatomy and morphology of the leaves, bracts and bracteoles within representatives of the order Brassicales indicate similarity of bracts and leaves, as well as the similarity between bracteoles and stipules. This is evidence in favor of homologous leaf and bracts, and stipules and bracteoles.
Micro-morphology and anatomy of Turbinicarpus (Cactaceae) spines
Mosco, Alessandro;
Revista mexicana de biodiversidad , 2009,
Abstract: spines are a striking feature of cacti and display wide variation in size, number, shape, and texture. this study showed that turbinicarpus species exhibit not only a high variability in the gross morphology of the spines, but also in their micro-morphology. their surface can be smooth or ornamented with projections that can be low, conical, pinnate, or long trichomes. the epidermis can be continuous, broken up into single cell elements or transversely fissured, the fissures extending deeply into the underlying sclerenchyma. the mechanical properties of the spines are related to their anatomy, here documented for the first time. the woody rigid spines being made up of fibers with thick walls (> 3 μm), while papery or corky spines have a sclerenchyma made up of fibers with thin walls (< 2 μm). alternatively, spine anatomy can be dimorphic with the outermost layers made up of thin-walled fibers and an inner core made up of thick-walled fibers. turbinicarpus taxonomy mostly relies on spine features and the newly collected data can contribute to a better understanding of the interspecific relationships. the epidermal features like long trichomes or the lack of ornamentation as well as the modified anatomy of corky spines may be apomorphic characters within the genus.
Comparative leaf morphology and anatomy of three Asteraceae species
Milan, Patricia;Hayashi, Adriana Hissae;Appezzato-da-Glória, Beatriz;
Brazilian Archives of Biology and Technology , 2006, DOI: 10.1590/S1516-89132006000100016
Abstract: the objective of this paper was to describe and compare the morphology and anatomy of mature leaves of mikania glomerata spreng., porophyllum ruderale cass. and vernonia condensata baker (asteraceae) species that have different habits emphasizing their secretory structures. longitudinal and transversal sections of mature leaf blades of the three species were analyzed at the apex, base, and medium third part of the midvein of the leaf blade and of the margin. m. glomerata had uniseriate glandular trichomes and secretory ducts; p. ruderale had hydathodes and secretory cavities; and v. condensata had idioblasts and uni-and biseriate glandular trichomes.
Morphology and anatomy of the developing fruit of Maclura tinctoria, Moraceae
Oyama, Sayuri de Oliveira;Souza, Luiz Antonio de;
Brazilian Journal of Botany , 2011, DOI: 10.1590/S0100-84042011000200006
Abstract: (morphology and anatomy of the developing fruit of maclura tinctoria, moraceae). maclura tinctoria (l.) d. don ex steudel was selected for the present study due of its economic and medicinal importance. the purpose of this investigation is to present a detailed description of the fruit development, specially by: (a) defining the fruit type presented by the species, and (b) characterizing the seed type of the species based upon the presence or not of mechanical tissue on the seed-coat. the fruit originates from the subglobose female inflorescence which consists of small unipistillate flowers with superior ovary, unilocular and uniovular apical placentation. the mature fruit is multiple, constituted of small drupes. the ovule is ana-campylotropous, suspended, bitegmic and crassinucellate. the mature seed is flattened, slightly ovated, cream colored, with unspecialized membrane coat with thin-walled cells more or less crushed. the seed has parenchymatic endosperm with lipophilic content. the embryo is straight, with two cotyledons of the same size. ontogenetic studies reveal that the fruits are infrutescences. the fleshy edible part is derived from the perigone and inflorescence axis. the drupes consist of a single pyrene of macrosclereids.
Morphology, Anatomy, Hair and Karyotype Structure of Salvia blepharoclaena Hedge and Hub.-Mor. (Lamiaceae), Endemic to Turkey  [PDF]
Mustafa Ozkan,Erhan Soy
Pakistan Journal of Biological Sciences , 2007,
Abstract: Salvia blepharoclaena is an endemic species belonging to the family Lamiaceae. In this study, morphology, anatomy, hair properties and chromosome number and morphology of this species were analysed. Chromosome number of Salvia blepharoclaena was counted as 2n = 14.
Root Morphology and Anatomy of Field-Grown Erianthus arundinaceus  [PDF]
Fumitaka Shiotsu, Jun Abe, Tetsuya Doi, Mitsuru Gau, Shigenori Morita
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.61012
Abstract: Erianthus species are perennial C4 grasses with such high biomass productivity and high tolerance to environmental stresses that they can be grown in marginal land to supply raw material for cellulosic bioethanol. Because high biomass production and strong tolerance to environmental stresses might be based on their large and deep-root system, we closely examined the morphology and anatomy of roots in first-year seedlings of field-grown Erianthus arundinaceus. The deep-root system of E. arundinaceus consists of many nodal roots growing with steep growth angles. Diameter of nodal roots with large variations (0.5 - 5 mm) correlates with the size and number of large xylem vessels. The microscopic observation shows that the nodal roots with dense root hairs developed soil sheath, hypodermis with lignified sclerenchyma in the outer cortex, and aerenchyma in the mid-cortex. In addition, starch grains were densely accumulated in the stele of nodal roots in winter. In the first year, E. arundinaceus developed less lateral roots than other reported grass species. The lateral roots formed a large xylem vessel in the center of the stele and no hypodermis in the outer cortex. Morphology and anatomy of E. arundinaceus root were discussed with reference to strong tolerance to environmental stresses.
Morphology and anatomy of the flower and anthesis of Metrodorea nigra St. Hill. (Rutaceae)
Souza, Luiz A. de;Moscheta, Ismar S.;Mour?o, Káthia S. M.;Rosa, Sonia M. da;
Brazilian Archives of Biology and Technology , 2004, DOI: 10.1590/S1516-89132004000100014
Abstract: studies on the morphology and anatomy of the flower and anthesis of metrodorea nigra st. hill. (rutaceae) showed perfect flowers, which occurred in panicle. the peak of the flowering was august and september. the anthesis was diurnal and the species presented protandrous flowers. the green sepals and the red petals presented papillose epidermis with stomata and parenchymatic mesophyll. the tetrasporangiate anther presented a papillose epidermis too, endothecium cells with secondary parietal thickenings, two middle layers and binucleate tapetum. the only pistil presented an ovary wall with nectariferous tissue and a meristematic ventral epidermis, a solid style and an inconspicuous stigma. the ovules were anatropous, bitegmic and crassinucelate and presented an obturator of funicular and placentic origin. the nectaries occurred around the ovary as a disk-like structure and in its apex as a number of pillose protuberances.
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2008,
Abstract: This study compares the structure and morphology of the vegetative subterranean and aerial organs in two Ocimum basilicum L. breeds cultivated in Turkey. The object of this study is to emphasize the infraspecific variation of the plant morphology and anatomy of these two breeds, underlining the importance of the secretory hairs that produce the volatile oils and concede this species the virtue of medicinal herb and aromatic plant.
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