Características palinológicas de las araliáceas de México

Author(s):

Victoria Sosa

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Grains ◽

Point Of View ◽

Generic Level ◽

Dichotomous Key ◽

Pollen Characters ◽

This work studies 17 species of mexican Araliaceae from the palynological point of view belonging to the genera Aralia, Dendropanax, Didymopanax, Redera, Oreopanax y Sciadodendron . All the pollen descriptions are presented at the generic level. The grains were studied based in scanning electron microscope and light microscope. It includes a dichotomous key for the genera grains. The results showed few differences between the pollen grains of the genera although some exine characters are important. Redera and Didymopanax presented an exine semi-tectate and the rest of the genera had tectate-perforate grains. This paper compared also some pollen characters with morphological ones, finding pollen characters considered primitive correlated with characters of primitive Araliaceae groups .

Taxonomic studies in the genus Haplanthodes (Acanthaceae)

Phytotaxa ◽

10.11646/phytotaxa.516.3.1 ◽

2021 ◽

Vol 516 (3) ◽

Author(s):

PRADIP VIKRAM DESHMUKH ◽

SIDDHARTHAN SURVESWARAN ◽

RAMCHANDRA DNYANOBA GORE ◽

MANOJ MADHWANAND LEKHAK

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Grains ◽

Prolate Spheroidal ◽

New Variety ◽

Exine Ornamentation ◽

Taxonomic Studies ◽

First Time ◽

The endemic Indian genus Haplanthodes (Acanthaceae) is revised. Four species, viz. H. neilgherryensis, H. plumosa, H. tentaculata and H. verticillata and a new variety, H. neilgherryensis var. toranganensis are recognized. Lectotype is designated for Haplanthodes, Haplanthus plumosus and H. verticillaris. The nomenclature of the Linnaean name Ruellia tentaculata is also discussed. Micromorphology of seed using light microscope (LM) and scanning electron microscope (SEM) is observed for the first time, and two types, reticulate and micro papillate, have been recognized based on surface sculpturing pattern. The genus differs from the related genera Andrographis and Haplanthus by distinctly two grooved seeds with hygroscopic hairs. Pollen grains of the genus are oblate or prolate spheroidal, distinctly triangular, trizonocolporate with reticulate exine ornamentation.

Comparison of pollen morphological structures of some taxa belonging to Asparagus L. and Fritillaria L. (Liliaceae) from Turkey

Bangladesh Journal of Botany ◽

10.3329/bjb.v36i2.1498 ◽

1970 ◽

Vol 36 (2) ◽

pp. 111-120 ◽

Cited By ~ 5

Author(s):

H Ozler ◽

S Pehlivan

Keyword(s):

Electron Microscope ◽

Key Words ◽

Transmission Electron Microscope ◽

Light Microscope ◽

Pollen Morphology ◽

Pollen Grains ◽

Exine Sculpture ◽

Transmission Electron ◽

Pollen grains of 20 taxa from two genera of the Liliaceae were examined and compared by LM (light microscope), SEM (scanning electron microscope) and pollens of four taxa were also examined with TEM (transmission electron microscope). Pollen grains shed as monads. They are monosulcate and ellipsoidal. Fritillaria crassifolia subsp. crassifolia Freyn & Smt. sometimes sheds the pollen as dyads. Exine is semitectate and the tectum is perforate. Columellae are simplicolumellate. Ectexine is thicker than endexine. Exine sculpture (ornamentation) is reticulate, reticulate-rugulate, rugulate and retipilate in Asparagus pollens and reticulate, suprareticulate, rugulate-reticulate and striate-reticulate in Fritillaria pollens. Sulcus extends from distal to proximal in some pollens of Asparagus and Fritillaria. Â Key words: Asparagus, Fritillaria, Liliaceae, Pollen morphology DOI = 10.3329/bjb.v36i2.1498 Bangladesh J. Bot. 36(2): 111-120, 2007 (December)

Pollen morphology of Plantago species native to Poland and their taxonomic implications

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.2004.041 ◽

2011 ◽

Vol 73 (4) ◽

pp. 315-325 ◽

Author(s):

Małgorzata Klimko ◽

Krystyna Idzikowska ◽

Mariola Truchan ◽

Anna Kreft

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Morphology ◽

Pore Diameter ◽

Pollen Grains ◽

Pollen Grain ◽

Prolate Spheroidal ◽

Taxonomic Implications ◽

Pollen grains of 9 species of the genus Plantago (Plantaginaceae), including 8 taxa native to Poland, were observed under a light microscope and a scanning electron microscope. Descriptions of grain sculpture are illustrated only SEM micrographs. The studied pollen grains were medium-sized or small, spherical or prolate spheroidal. Their sculpture was always verrucate with granulation. In the studied taxa, internal apertures had the form of pores. Their number ranged from (4)5-9(14). The pores were scattered on the surface of pollen grains. Identification features of individual taxa include: presence or absence of an annulus around each pore, annulus structure, ornamentation of the pollen grain and operculum, type of aperture membrane, number of internal pores, and pore diameter. We suggest that two new pollen grain types, characteristic of P. intermedia and P. arenaria, should be distinguished, and that P. alpina should be assigned to the P. coronopus type.

Observations on the pollen morphology of Cassytha filiformis (Lauraceae) in India

Indian Journal of Forestry ◽

10.54207/bsmps1000-2019-n45q97 ◽

2019 ◽

Vol 42 (3) ◽

pp. 209-211

Author(s):

Saurabh Sachan ◽

◽

S.B. Padal ◽

Keyword(s):

Electron Microscope ◽

South African ◽

Light Microscope ◽

Pollen Morphology ◽

Pollen Grains ◽

African Region ◽

African Species ◽

Morphological Variations ◽

Genus Cassytha (Lauraceae) is characterized by unigue Pollen morphology. We Prepared strains of C. filiformis following acetolysis method (Ikuse, 1956) for observation under Light Microscope and Scanning Electron Microscope. The present study revealed that the lamellar and scbrate nature of exine are entirely different and attributing to different morphology of pollen grains, especially the shape. This communication provides a comparison of pollen morphology between Indian and South African species filiformis discriminates the morphological variations found among the Indian specimens of C. filiformis from that of South African region.

A palynological survey of the genus Iberis (Brassicaceae), known as candytufts, in Turkey

Phytotaxa ◽

10.11646/phytotaxa.397.3.1 ◽

2019 ◽

Vol 397 (3) ◽

pp. 213 ◽

Author(s):

BURCU YILMAZ ÇITAK

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Grains ◽

Polar View ◽

Prolate Spheroidal ◽

Exine Ornamentation ◽

First Time ◽

The present study reports for the first time detailed palynological traits of the Turkish species Iberis. Both light microscope (LM) and scanning electron microscope (SEM) were used for the characterisation of the species. Radially symmetrical, isopolar, and tricolpate pollen grains were observed as common characters in all of the examined taxa. The pollen grains were prolate-spheroidal with polar axes ranging from 21.97 to 29.25 µm and equatorial axes ranging from 20.34 to 26.09 µm. Their polar shapes were subcircular to subtriangular. Two types of exine ornamentation were observed using a SEM. A numerical UPGMA analysis showed that the dimensions of polar axes, equatorial axes and outline in polar view (amb) were the most valuable variables for separating the Iberis species.

Comparative pollen morphology of sect. Quinqueloculares (Campanulaceae) in Turkey

Biologia ◽

10.2478/s11756-012-0073-2 ◽

2012 ◽

Vol 67 (5) ◽

Author(s):

Emine Alçitepe

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Morphology ◽

Pollen Grains ◽

AbstractThe pollen morphology of Turkish species belonging to sect. Quinqueloculares (Boiss.) Phitos (Campanulaceae) were investigated with a light microscope (LM) and scanning electron microscope (SEM). All examined species are endemic, except Campanula crispa Lam. According to the results of this study, pollen grains of the examined taxa were triporate and spheroidal. Their sculpture was spinose and baculate (C. crispa Lam.); spinulose and microperforate (C. tomentosa Lam.); microperforate (C. vardariana Bocquet) or more commonly, microechinate (C. iconia Phitos, C. lyrata Lam. subsp. lyrata, C. hagielia Boiss., C. sorgerae Phitos, C. betonicifolia SM., C. karadjana Bocquet, C. telmessi Hub.-Mor. & Phitos, C. davisii Turrill).

Pollen morphology of the Rosaceae of western Canada. III. Geum

Canadian Journal of Botany ◽

10.1139/b90-175 ◽

1990 ◽

Vol 68 (6) ◽

pp. 1369-1378 ◽

Cited By ~ 8

Author(s):

R. J. Hebda ◽

C. C. Chinnappa

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Pollen Morphology ◽

Pollen Grains ◽

Western Canada ◽

Polar Diameter ◽

Pollen grains of eight species of Geum (Rosaceae) from western Canada were studied in the light microscope and the scanning electron microscope. The taxa included Geum aleppicum, Geum calthifolium, Geum glaciale, Geum macrophyllum, Geum rivale, Geum rossii, Geum schofieldii, and Geum triflorum. All taxa produce pollen grains in monads that are isopolar, radially symmetrical, and predominantly tricolporate. Tetracolporate grains occur especially in Geum rossii and Geum calthifolium. Grains are subspheroidal to subprolate with a circular to subtriangular amb. All taxa exhibit a well-developed chambered aperture formed by overarching pore flaps. Flaps extend over the aperture but do not join to form an equatorial bridge. The chamber of Geum schofieldii is distinct and complex, often extending equatorially along a sinuous path to the adjacent aperture. Exine is tectate, microperforate, with a thin nexine. Sculpturing is striate or occasionally rugulate and consists of ridges and valleys with microperforations on valley floors. Ridges and valleys are oriented predominantly parallel to the colpus but occasionally curve or loop near the poles. Sculpturing of Geum schofieldii pollen, is predominantly striate but exhibits a unique verrucate to rugulate pattern along the equator caused by elaboration of the sexine. Polar diameter varies from ca. 20 μm in Geum macrophyllum to 33 μm in Geum schofieldii. The distinctness of Geum schofieldii pollen supports specific status.

Marine fungi from Seychelles. I. Nimbospora effusa and Nimbospora bipolaris sp. no v. from driftwood

Canadian Journal of Botany ◽

10.1139/b85-076 ◽

1985 ◽

Vol 63 (3) ◽

pp. 611-615 ◽

Cited By ~ 11

Author(s):

Kevin D. Hyde ◽

E. B. Gareth Jones

Keyword(s):

Electron Microscope ◽

Light Microscope ◽

Marine Fungi ◽

Undescribed Species ◽

Collections of filamentous marine fungi in Seychelles included Nimbospora effusa Koch and an undescribed species, Nimbospora bipolaris Hyde & Jones sp. nov. Tha latter differs from N. effusa in the size of the ascospores and in ascospore appendage morphology. Both species are illustrated by light microscope and scanning electron microscope micrographs.

SEM OBSERVATIONS ON 'TAWARA-SHIBO' (A SERIES OF SWELLINGS ALONG THE AXIS) STEMS OF CHAMAECYPARIS OBTUSA

IAWA Journal ◽

10.1163/22941932-90000291 ◽

2002 ◽

Vol 23 (1) ◽

pp. 83-96 ◽

Author(s):

Ryogo Nakada ◽

Kaichiro Kawamura

Keyword(s):

Growth Rate ◽

Electron Microscope ◽

Growth Rates ◽

Light Microscope ◽

Chamaecyparis Obtusa ◽

Stem Form ◽

Anatomical Features ◽

Hormonal Secretion ◽

The anatomy of tawara-shibo stems of Chamaecyparis obtusa (Siebold & Zucc.) Endl. was observed using a scanning electron microscope (SEM) and a light microscope. Tawara-shibo is a strange stem form with a series of swellings that appear at regular intervals along the stem axis. Multiseriate rays, trabeculae and related structures, and modified tracheids were frequently observed at swollen portions. These features were less frequent at non-swollen portions.We conclude that abnormal cambial activities, occurring at regular longitudinal intervals, cause the formation and development of these three anatomical features and higher growth rates at swollen portions. As a result of differences in growth rate between swollen and non-swollen portions, the stem form of tawara-shibo develops. It is suggested that formation of the characteristics observed in tawara-shibo stems is genetically controlled by hormonal secretion into or within the cambium.