Seed Micromorphology of Orthosiphon spp. and Its Relatives (Lamiaceae)

Abstractforms a big group in terms of the number of species it includes, and studies conducted in recent years reveal results which are different from each other in terms of the systematics and phylogeny of the genus. In order to reveal both qualitative and quantitative seed properties of the species belongs to phylogenetically related genera in detail and to investigate which properties are diagnostic among these taxon, the seed micromorphology and morphometry of 10 taxa from

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Seed micromorphology of central European Orobanche and Phelipanche (Orobanchaceae) in relation to preferred hosts and systematic implications

Australian Systematic Botany ◽

10.1071/sb15007 ◽

2015 ◽

Vol 28 (3) ◽

pp. 124 ◽

Cited By ~ 6

Author(s):

Renata Piwowarczyk

Keyword(s):

Morphological Characters ◽

Seed Morphology ◽

Diagnostic Features ◽

The Czech Republic ◽

Vegetative Organs ◽

Periclinal Wall ◽

Taxonomic Criterion ◽

Seed Micromorphology ◽

Wall Perforation ◽

Almost All

Holoparasitic genera within family Orobanchaceae are characterised by greatly reduced vegetative organs; therefore, seed micromorphology has proved to be a useful complementary taxonomic criterion. Seeds of 160 samples from 54 localities of 26 taxa of the Orobanche and Phelipanche genera occurring in central Europe, specifically from Poland, the Czech Republic, Austria and Slovakia, supplemented by samples from Spain, France and Ukraine, were investigated using scanning electron microscopy. Thirteen quantitative or qualitative morphological characters of seeds were analysed. The following three types of periclinal wall sculpture of seeds were identified: veined and fibrillar in Phelipanche; with oval or elliptic perforations (pitted) in almost all species of Orobanche; with outer periclinal wall smooth, granular or rugged (very rarely visibly pitted), impeding vision of the inner one, occurring only in O. gracilis Sm. and O. coerulescens Stephan in Willd. The influence of different hosts on the features of seeds of eight species is also presented, as well as relationships between seed morphology and taxonomic classification, including problematic taxa. The best diagnostic features include type of ornamentation of the periclinal wall, perforation diameter (in pitted sculpture), fibrillar diameter (in fibrillar sculpture) and width of anticlinal walls. Size and shape of the seeds and cells and the presence of median troughs are variable; however, these features can be helpful when using larger samples. The usefulness of micromorphological studies on seeds of Orobanche and Phelipanche is demonstrated.

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Remarks Using the SEM method Species Seeds of Gentiana occurring in Turkey

Planta Daninha ◽

10.1590/s0100-83582017350100007 ◽

2017 ◽

Vol 35 (0) ◽

Author(s):

E. ALÇITEPE ◽

S. ERKEN ◽

F. GÜLBAG ◽

M.E. ÖZZAMBAK

Keyword(s):

Cell Size ◽

Morphological Character ◽

Seed Shape ◽

Different Types ◽

Seed Micromorphology ◽

Periclinal Walls ◽

First Time ◽

Seed Characteristics ◽

Wing Cell

ABSTRACT Seeds of eleven perennial Gentiana collected from Turkey were analyzed using the SEM method. Other species excluding G. septemfida, G. boissieri, G. gelida were studied for the first time. They were identified and compared in terms of seed characteristics and surface ornamentations. Major characteristics including the outer periclinal walls of testa, sculpting of inner periclinal walls, seed shape, seed and testa cell, wing cell size, thickness of testa wall and seed shape have been proposed for Turkey Gentiana. They are divided into different types, such as no wing, chalazal wing, incomplete discoid wing, complete discoid wing according to the outer periclinal walls of testa. Considering primary sculpting of seeds, irregularly striate and shallowly reticulate type is observed. Anticlinal walls of G. olivieri, G. boissieri and G. gelida are curved, while others are straight. G. lutea has the largest mean seed (4.20 x 4.40 mm), while G. cruciata (0.67 x 0.60 mm) and G. olivieri have the smallest mean seeds (0.67 x 0.67 mm). Seed micromorphology can be used together with morphological character to form classifications in studied specimens for Gentiana genus.

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Seed micromorphology in Dactylorhiza Necker ex Nevski (Orchidaceae)and allied genera

TURKISH JOURNAL OF BOTANY ◽

10.3906/bot-1401-66 ◽

2015 ◽

Vol 39 ◽

pp. 298-309 ◽

Cited By ~ 8

Author(s):

Roberto GAMARRA ◽

Pablo GALÁN ◽

Henrik Ærenlund PEDERSEN ◽

Emma ORTÚÑEZ ◽

Ernesto SANZ

Keyword(s):

Seed Micromorphology

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A revision of the Rhododendron taipaoense complex (subg. Tsutsusi sect. Tsutsusi, Ericaceae), based on observations of morphological characters and seed micromorphology

Phytotaxa ◽

10.11646/phytotaxa.92.2.1 ◽

2013 ◽

Vol 92 (2) ◽

pp. 25

Author(s):

XIAO-FENG JIN ◽

BING-YANG DING ◽

YING-YING ZHOU ◽

SHUI-HU JIN ◽

WANG-WEI YANG

Keyword(s):

Morphological Characters ◽

Principal Coordinate Analysis ◽

Morphological Data ◽

Herbarium Specimens ◽

Leaf Color ◽

Flower Number ◽

Seed Shape ◽

Corolla Length ◽

Seed Micromorphology ◽

Different Populations

In this paper, we present a revision of the Rhododenron taipaoense complex, including R. taipaoense and eight other named species, based on literature survey, field collections and observations, inspection of herbarium specimens, statistical analysis of morphological characters, and SEM observation of seed shape and testa. We evaluated all characters that have previously been used to diagnose these species: indumentum of young shoots and abaxial surfaces of leaves; filament dimensions; style base; leaf color, size, and apex shape; flower number per inflorescence; corolla length; and length of the stamen and pistil. Cluster analysis of 146 individuals showed that individuals from different populations are interdigitated, irrespective of traditional taxonomic limits. Analysis of morphological data using principal coordinate analysis (PCoA) likewise shows a continual gradation between populations, rather than disjunctures between named species. Consequently, only one species is recognized in the present paper, and R. apricum, R. falcinellum (R. apricum var. falcinellum), R. florulentum, R. hepticum, R. piceum, R. rufulum, R. spadiceum, and R. rufoindumentum (nom. nud.) are all reduced to synonyms of R. taipaoense.

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