P p p p 1 pscience program, department of communication sciences and disorders, emerson college, boston, ma 02116 2 p harvard forest, harvard university, 324 north main street, petersham, ma 066. On the other hand, pollen morphology does not seem to have systematic value at tribal level in rhamnaceae. Pollen morphology and the relationship of the plumbaginaceae, polygonaceae, and primulaceae to the order centrospermae joan w. Nesom shrubs, trees, or woody vines, herbs, annual or perennial, evergreen or deciduous, synoecious, dioecious, or polygamous monoecious, sometimes armed with thorns or stipular spines. The pollen morphology of eight neouvaria species and three species of the closely related genus. Pollen types with different aperture numbers often. The rhamnaceae have a worldwide distribution, but are more common in the subtropical and tropical regions.
Rhamnaceae constitute a mediumsized plant family 52 genera and ca. Pollen morphology and its relationship to taxonomy of the. Hyde national museum of wales, cardiff received 22 may 1954 with i figure in the text the latin pollen morphological terms and definitions put forward by erdtman 1943. From a neodarwinian point of view, this means that i some polymorphism for aperture number must exist and ii there must be some fitness increase associated with increasing the aperture number.
The pollen morphology of the families is significantly useful for characterizing the species. Leaves simple, petiolate, alternate or opposite, pinnately veined or 35veined, entire to serrate, sometimes much reduced. Pollen morphology of polish species from the genus rubus l. Historical biogeography of two cosmopolitan families of flowering plants. The value of pollen morphology in the classification of. Pollen morphology of selected bee forage plants shubharani, r. Pollen morphology is one of the most important and fundamental branches of palynology.
Pollen grain shape varies from prolate to oblate ellipsoidal, however most genera have subspherical pollen. Pollen morphology of the genus is noted as follows. The subtribe is europalynous and grains occur either as monads, tetrads or massulae. The pollen grains are produced within the anther of the. Pollen grain morphology is in accordance with the general morphological pattern of the family rhamnaceae 2, 11, 17, 47. Literature on pollen morphology of the rhamnaceae is relatively abundant, and descriptions are often given 2, 911. Consistent with the general morphological pattern of the family rhamnaceae, the pollen grains of puliuriis are. Unfortunately, most of these results were obtained from herbarium specimens. Devore4 1section of integrative biology and plant resources center, university of texas at austin, austin, texas 78712 2department of botany and microbiology, university. To fulfil these aims specific objectives were defined.
Pollen morphology of the studied taxa of malvaceae 1 abelmoschus esculentus x 500 2hibiscus trionum x 750 3 hibiscus rosasinensis x 750 4 hibiscussp. The study investigates the significance of pollen morphology in the. Rosaceae 3 rosaceae barbeyaceae dirachmaceae rhamnaceae elaeagnaceae ulmaceae cannabaceae moraceae urticaceae fig. Apertural types and tectum types are the most significant pollen characters. Localization, morphology, anatomy and ultrastructure of. Rhamnaceae gouania phillipsonii buerki plate 9, figures 19. Pollen morphology and its relationship to taxonomy of the genus sarracenia sarraceniaceae w. Dispersed leaves that have rhamnaceaelike morphology but do not fit into the rhamnoid or ziziphoid leaf types are common in the fossil record. This is the first report on the presence of orbicules in the family rhamnaceae. Proper identification of pollen and spores both of living and fossil plants is a prerequisite for exploiting their applications. View pollen morphology research papers on academia. Pollen morphology of some species in the family solanaceae.
Global pollen project uuid 366da2dd3eff4070be890fde55aafdb9 botanical reference none available. Ziziphus mistol is essentially an obligate outcrosser dependent of animal pollen vectors flowers exhibit complete intrafloral dichogamy that fully prevents autonomous selfpollination. Pollen morphology pollen grains medicinal plants archive. Flower development and pollen morphology in cucurbitaceae. Phylogenetic,lmplications of pollen morphology and ultrastructure in the barnadesioideae asteraceae zaiming zhao1, john j. Pollen morphology of some species in the family solanaceae adedeji, o. A isopolar the proximal and distal faces of the exine are alike b heteropolar the distal and proximal faces of the exine are different, either in shape, ornamentation. Pollen morphology of melliferous plants for apis mellifera. Skvarla introduction the centrospermae caryophyllales represents one of the most controversial orders in the angio sperms.
Pollen and seed morphology of the genus marrubium lamiaceae. Tapetum, orbicule, and pollen grain ontogeny in colletia paradoxa and discaria americana were studied with transmission electron microscopy tem. Rhamnaceae is a large family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family. However, ultrastructural studies on the development of pollen grains in rhamnaceae are rare and restricted to descriptions of the pollen grain wall. Pollen grain morphology of fabaceae in the special. Pollen and seed morphology of rhinacanthus nees and sol. The ultrastructural changes observed during the different stages of development in the tapetal cells and related to orbicule and pollen grain formation are described. The plants of this family are cosmopolitan in distribution.
Pollen morphology and ultrastructure of selected species. Poaceae characteristic morphological features britannica. B pollen from watermelon is trizoneporate, isopolar with radial symmetry. Pollen morphology and ultrastructure of selected species of. The pollen morphological characters of all species examined are summarized based on observation from light fig. Aug 22, 2019 however, pollen illustrations of some tropical angiospermous plants, particularly abundant in the western ghats have been incorporated in this chapter figs. The rubiaceae are a family of flowering plants, commonly known as the coffee, madder, or bedstraw family.
Although the presence of scent was described for several species of rhamnaceae, localization, morphology and structure of osmophores were unknown. Your use of this pdf, the bioone complete website, and all posted and associated. Morphological characteristics of pollen grains have been categorised into different groups. Species of this genus are characterized by synchronous protandrous dichogamy and selfincompatibility. Laboratory of biodiversity and apiculture, department of botany, bangalore university, bangalore560056, india abstract pollen taxonomy is the prerequisite to compare the pollen present in honey samples with special reference to. Pollinatormediated geitonogamy can easily take place at the level of the inflorescence or of the entire plant.
You can check the plant list for further information. A laboratory manual, narosa publishing house, new delhi. Plants of the buckthorn family if you find a dicot shrub or small tree with visibly threeparted capsules or berries, then it is likely a member of the buckthorn family. The family contains about 55 genera and 950 species. Pollen, tapetum, and orbicule development in colletia. Use the link below to share a fulltext version of this article with your friends and colleagues. Rhamnaceae or indian jujube family or buckthorn family includes 58 genera and about 900 species.
The family contains about,500 species in 611 genera, which makes it the fourthlargest angiosperm family rubiaceae has a cosmopolitan distribution. Aug 12, 2016 on the other hand, pollen morphology does not seem to have systematic value at tribal level in rhamnaceae. Pollen, tapetum, and orbicule development in colletia paradoxa and discaria americana rhamnaceae. The presence or absence of orbicules and their morphology vary within tribes. Pollen morphology is one of the significant tools in solving some taxonomic problems on the family, generic or specific level and has become part of the multidisciplinary and collaborative approach in plant systematic and evolution. P p p p 1 pscience program, department of communication sciences and disorders, emerson college, boston, ma 02116 2. Pollen morphological description of some plants pollen grains.
Pollen morphology of 11 species representing 5 genera of the family rhamnaceae from pakistan have been examined by light and scanning electron microscope. Rosaceae and 2 its systematic importance 3 4 kacper lechowicz1, dorota wronskapilarek1, jan bocianowski2, tomasz malinski1 5 6 1 department of forest botany, poznan university of life sciences, wojska polskiego 71 d, 60625 poznan, poland 7 2 department of mathematical and statistical methods, faculty of agronomy and. Pollen morphology of selected plants from erkwit university of. The following pollen morphological descriptions of some mimosoids are accompanied by fig. Most flowervisitor interactions are unspecialized, but as the floral tube varies in diameter and length across the family medan and schirarend, 2004. Poaceae poaceae characteristic morphological features. Pollen grain pollen is a fine to coarse powder containing micro gametophytes produce male gametes sperm cells. C autofluorescence of mature zucchini pollen excited with ultraviolet light.
As a result of acetolysis, pollen shape varied considerably. Taxonomic novelties and pollen morphological study in the genus. Therefore, this study aimed to investigate and describe the pollen morphology of 10 species belongs to 9 genera and five tribes of. We studied different species of the tribes rhamneae rhamnoids clade, pomaderreae, colletieae, paliureae ziziphoids clade and the species alphitonia excelsa unknown tribe, ziziphoids clade. The pollen morphology of the genus paliirrus and the 5 species it comprises is described. Ziziphus comprises important fruit trees that inhabit arid environments of tropical and subtropical regions of the world and are able to adapt to drought and salt stress.
It will not be an exaggeration if pollen morphology is referred to as the mother of palynological studies. Pdf pollen biology and morphology of ziziphus jujuba mill. Pollen grains of 107 species of 61 genera of the gardeniinae were investigated by scanning electron and light microscopy. It consists of terrestrial trees, shrubs, lianas, or herbs that are recognizable by simple, opposite leaves with interpetiolar stipules.
The study investigates the significance of pollen morphology in the systematics of some species in the family solanaceae. Phylogenetic,lmplications of pollen morphology and. The pollen morphology of 20 species of malvaceae growing in yemen was investigated by light. Pdf pollen biology and morphology of ziziphus jujuba. Species of rhamnaceae contained within the plant list belong to 52 plant genera.
Pollen morphology of the genus paliiiriis rhamnaceae. Taxonomic importance of pollen morphology for some species. The foamy, white, greenish or even blue spray of flowers of the ceanothus is also hard to miss, when in season. Over evolutionary time, the morphology of angiosperm pollen has evolved toward an increasing number of apertures, among other things.
The plant list includes 2,892 scientific plant names of species rank for the family rhamnaceae. A list of all accepted names in rhamnaceae is available in csv format. Department of botany, obafemi awolowo university, ileife, osun state, postal codea234, nigeria. Pollen biology and morphology of ziziphus jujuba mill. Consistent with the general morphological pattern of the family rhamnaceae, the pollen grains of puliuriis are uniformly isopolar, radially symmetrical. It seems that for rhamnaceae, the anatomy of the reproductive sporophytic structures could have more systematic value than the gametophytic structures. Pollen grains have a hard coat that protects the sperm cells during the process of their movement between the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants.
Pollen grains are generally free, radially symmetrical, isopolar, colporate. Members of rhamnaceae, or the buckthorn family, are characterized by woodiness, stamens male alternating with sepals opposite petals, when present, a disk of tissue developing under or around the ovary, and joined bases of flower parts that form a cup hypanthium surrounding the ovary. Hyde national museum of wales, cardiff received 22 may 1954 with i figure in the text the latin pollenmorphological terms and definitions put forward by erdtman 1943. Morphology of pollen grains 1 polarity the polar axis is the straight line between the distal and proximal poles of a pollen grain or a spore pollen grains can therefore be. Leaves alternate, fascicled, clustered, or opposite, simple. Devore4 1section of integrative biology and plant resources center, university of texas at austin, austin, texas 78712. Pollen unit monad research study in pollen morphology conducted in dlsudasma documentation and identification of pollen found at dlsudasma bognot, et. Shape of pollen grains are subprolate or oblatespheroidal rarely prolate. A pollen catapult mechanism is present in the genera molopanthera and posoqueria tribe posoquerieae that projects a spherical pollen mass onto visiting sphingidae. Abstract pollen morphology of 11 species representing 5 genera of the family rhamnaceae from pakistan have been examined by light and scanning electron microscope.
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