General Key to the Families
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BIOLOGY ASSIGNMENT CLASS IX UNIT II- FLOWERING PLANT Chap 3- the Flower
BIOLOGY ASSIGNMENT CLASS IX UNIT II- FLOWERING PLANT Chap 3- The Flower Flower is the most attractive,brightly coloured and significant part of plant. It help in sexual reproduction and later forms fruit and seeds. Characterstic of flower : The flower possesss the following characterstic – 1. Flower is the highly modified and specialized shoot meant for Sexual Reproduction. 2.The nodes and internodes are highly condensed to form a flat thalamus or receptacles. 3. Thalamus is quiet short and usually borne at the end of the stalk called Pedicel. 4.The flower arise from the leaf like structure called bract. 5. The floral part of flower are borne on thalamus in the form of four whorls. 6. These four whorl includes from outer side – Calyx ( sepal ), Corolla( petal ) , Androecium (stamen ), Gynoecium ( carpel ). Parts of a Flower : Floweris attached with the stem or its branch with the help of a stalk called Pedicel. If the flower is without pedicel it is called sessile . The pedicel arises from the axil of green leaf like structure called Bract.The other swollen end of the pedicel is Thalamus or torus . On the thalamus usually four whorl of Floral structure are present These four whorl from outside to inside are : i. Calyx iii. Androecium ii. Corolla iv. Gynoecium I. CALYX It is the outermost and the lowermost whorl , green in colour which cover an unopened bud .The single unit of Calyx is called sepal .It may be fussed or free from each other. Additional floral whorl outside the Calyx is called Epicalyx. Function of Calyx : i. -
Functional Analyses of Genetic Pathways Controlling Petal Specification in Poppy Sinéad Drea1, Lena C
RESEARCH ARTICLE 4157 Development 134, 4157-4166 (2007) doi:10.1242/dev.013136 Functional analyses of genetic pathways controlling petal specification in poppy Sinéad Drea1, Lena C. Hileman1,*, Gemma de Martino1 and Vivian F. Irish1,2,† MADS-box genes are crucial regulators of floral development, yet how their functions have evolved to control different aspects of floral patterning is unclear. To understand the extent to which MADS-box gene functions are conserved or have diversified in different angiosperm lineages, we have exploited the capability for functional analyses in a new model system, Papaver somniferum (opium poppy). P. somniferum is a member of the order Ranunculales, and so represents a clade that is evolutionarily distant from those containing traditional model systems such as Arabidopsis, Petunia, maize or rice. We have identified and characterized the roles of several candidate MADS-box genes in petal specification in poppy. In Arabidopsis, the APETALA3 (AP3) MADS-box gene is required for both petal and stamen identity specification. By contrast, we show that the AP3 lineage has undergone gene duplication and subfunctionalization in poppy, with one gene copy required for petal development and the other responsible for stamen development. These differences in gene function are due to differences both in expression patterns and co- factor interactions. Furthermore, the genetic hierarchy controlling petal development in poppy has diverged as compared with that of Arabidopsis. As these are the first functional analyses of AP3 genes in this evolutionarily divergent clade, our results provide new information on the similarities and differences in petal developmental programs across angiosperms. Based on these observations, we discuss a model for how the petal developmental program has evolved. -
The Classification of Plants, Viii
70 The Ohio Naturalist [Vol. XIII, No. 4, THE CLASSIFICATION OF PLANTS, VIII. JOHN H. SCHAFFNER. Below is presented a synopsis of the fifteen plant phyla given in the preceding paper of this series. The classification of the fungi follows with a key to the orders. The following changes should be made in the arrangement of the families of Anthophyta as presented in the sixth paper: Transfer the Parnassiaceae from Saxifragales to Ranales following the Ranunculaceae. Interchange the position of Loganiaceae and Oleaceae. Also interchange the position of Bromeliaceae and Dioscoreaceae. SYNOPSIS OF THE PLANT PHYLA. A. Plant body unicellular or filamentous, or if a solid aggregate through the ovary, when present, not an archegonium; never seed-producing; nonsexual, with a simple sexual life cycle, or with an alternation of generations. I. Cells typically with poorly differentiated nuclei and chromatophores, reproducing by fission; motile or nonmotile, colored or colorless, with or without chlorophyll but never with a pure chlorophyll- green color; resting spores commonly present. Phylum 1. SCHIZOPHYTA. II. Cells with well differentiated nuclei, and if holophytic usually with definite chromatophores; with or without chlorophyll; colorless, green, or variously tinted by coloring matters. (I.) Nonsexual, unicellular plants without chlorophyll having a plasmodium stage of more or less completely fused amoeboid cells from which complex .sporangium-like resting bodies are built up. Phylum 2. MYXOPHYTA. (II.) Plants not developing a plasmodium, but the cells normally covered with walls in the vegetative phase. 1. Unicellular or filamentous plants containing chlorophyll, either brown with silicious, two-valved walls or green with complex chromatophores, the walls not silicificd; conjugating cells not ciliated, isogamous. -
Field Guide to Intermountain Rushes
United States Department of Field Guide to Agriculture Forest Service Intermountain Intermountain Research Station Rushes General Technical Report INT-306 Emerenciana G. Hurd Sherel Goodrich May 1994 Revised January 1997 Nancy L. Shaw THE AUTHORS Idaho, an M.S. degree in botany at Idaho State University, and a Ph.D. EMERENCIANA G. HURD is bota- degree in crop science at Oregon nist with the Intermountain Re- State University. search Station at the Forestry Sci- ences Laboratory in Boise, ID. ACKNOWLEDGMENTS Originally from the Phillipines, she holds a B.S. degree in biology from Warren Clary, Project Leader of Whitman College, Walla Walla, WA, the Intermountain Research and M.S. and Ph.D. degrees in Station’s Riparian/Stream Ecology botany from Northern Arizona and Management Research Work University. Unit, suggested the idea of devel- SHEREL GOODRICH is range con- oping field guides for grasslike spe- servationist for the Ashley National cies of Intermountain riparian areas. Forest, Vernal, UT. He received a We appreciate his helpful advise B.S. degree in range management and leadership in the accomplish- from Utah State University in 1971 ment of this work. We offer special and an M.S. degree in botany from thanks to Joy Mastrogiuseppe, cu- Brigham Young University in 1981. rator of the Marion Ownbey Her- He worked extensively in Utah and barium, Washington State Univer- central Nevada when he was with sity, for her taxonomic assistance; the Intermountain Research Sta- Lynda Smithman, Intermountain tion, Provo, UT. Research Station, for her helpful suggestions and encouragement; NANCY L. SHAW is botanist with Joe Duft for his assistance with the Intermountain Research Station photography; and Gary Hurd for his at the Forestry Sciences Laboratory willingness to drive long distances in Boise, ID. -
Harvard Papers in Botany Volume 22, Number 1 June 2017
Harvard Papers in Botany Volume 22, Number 1 June 2017 A Publication of the Harvard University Herbaria Including The Journal of the Arnold Arboretum Arnold Arboretum Botanical Museum Farlow Herbarium Gray Herbarium Oakes Ames Orchid Herbarium ISSN: 1938-2944 Harvard Papers in Botany Initiated in 1989 Harvard Papers in Botany is a refereed journal that welcomes longer monographic and floristic accounts of plants and fungi, as well as papers concerning economic botany, systematic botany, molecular phylogenetics, the history of botany, and relevant and significant bibliographies, as well as book reviews. Harvard Papers in Botany is open to all who wish to contribute. Instructions for Authors http://huh.harvard.edu/pages/manuscript-preparation Manuscript Submission Manuscripts, including tables and figures, should be submitted via email to [email protected]. The text should be in a major word-processing program in either Microsoft Windows, Apple Macintosh, or a compatible format. Authors should include a submission checklist available at http://huh.harvard.edu/files/herbaria/files/submission-checklist.pdf Availability of Current and Back Issues Harvard Papers in Botany publishes two numbers per year, in June and December. The two numbers of volume 18, 2013 comprised the last issue distributed in printed form. Starting with volume 19, 2014, Harvard Papers in Botany became an electronic serial. It is available by subscription from volume 10, 2005 to the present via BioOne (http://www.bioone. org/). The content of the current issue is freely available at the Harvard University Herbaria & Libraries website (http://huh. harvard.edu/pdf-downloads). The content of back issues is also available from JSTOR (http://www.jstor.org/) volume 1, 1989 through volume 12, 2007 with a five-year moving wall. -
Morphology and Morphogenesis of the Seed Cones of the Cupressaceae - Part I Cunninghamioideae, Athrotaxoideae, Taiwanioideae, Sequoioideae, Taxodioideae
1 2 Bull. CCP 3 (3): 117-136. (12.2014) A. Jagel & V.M. Dörken Morphology and morphogenesis of the seed cones of the Cupressaceae - part I Cunninghamioideae, Athrotaxoideae, Taiwanioideae, Sequoioideae, Taxodioideae Summary Seed cone morphology of the basal Cupressaceae (Cunninghamia, Athrotaxis, Taiwania, Metasequoia, Sequoia, Sequoiadendron, Cryptomeria, Glyptostrobus and Taxodium) is presented at pollination time and at maturity. These genera are named here taxodiaceous Cupressaceae (= the former family Taxodiaceae, except for Sciadopitys). Some close relationships exist between genera within the Sequoioideae and Taxodioideae. Seed cones of taxodiaceous Cupressaceae consist of several bract-/seed scale-complexes. The cone scales represent aggregation of both scale types on different levels of connation. Within Cunninghamia and Athrotaxis the bulges growing out of the cone scales represents the distal tip of the seed scale, which has been fused recaulescent with the adaxial part of the bract scale. In Athrotaxis a second bulge, emerging on the distal part of the cone scale, closes the cone. This bulge is part of the bract scale. Related conditions are found in the seed cones of Taiwania and Sequoioideae, but within these taxa bract- and seed scales are completely fused with each other so that vegetative parts of the seed scale are not recognizable. The ovules represent the only visible part of the seed scale. Within taxodiaceous Cupressaceae the number of ovules is increased compared to taxa of other conifer families. It is developed most distinctly within the Sequoioideae, where furthermore more than one row of ovules appears. The rows develop centrifugally and can be interpreted as short-shoots which are completely reduced to the ovules in the sense of ascending accessory shoots. -
Early Flower and Inflorescence Development in Dioscorea Tokoro
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Wulfenia Jahr/Year: 2010 Band/Volume: 17 Autor(en)/Author(s): Remizowa Margarita V., Sokoloff Dmitry D., Kondo Katsuhiko Artikel/Article: Early flower an inflorescence development in Dioscorea tokoro (Dioscoreales): shoot chirality, handedness of cincinni an common tepal-stamen primordia 77-97 © Landesmuseum für Kärnten; download www.landesmuseum.ktn.gv.at/wulfenia; www.biologiezentrum.at Wulfenia 17 (2010): 77–97 Mitteilungen des Kärntner Botanikzentrums Klagenfurt Early fl ower and infl orescence development in Dioscorea tokoro (Dioscoreales): shoot chirality, handedness of cincinni and common tepal-stamen primordia Margarita V. Remizowa, Dmitry D. Sokoloff & Katsuhiko Kondo Summary: Infl orescence and early fl ower development in the East Asian Dioscorea tokoro were investigated using scanning electron microscopy (SEM). The synfl orescence is typically a raceme of open thyrses. Lateral units of thyrses are cincinni, which in female plants are often replaced by single fl owers with a bracteole. Phyllotaxy of thyrse axis follows the Fibonacci pattern. There is a correlation between clockwise or anticlockwise direction of phyllotaxy along the thyrse axis and handedness of lateral cincinni. Two types of this correlation are theoretically possible, and both have been recorded in diff erent angiosperms. Flower orientation in Dioscorea is the same as in many other monocots that possess a bracteole, i.e. an outer whorl tepal is inserted opposite the bracteole and an inner whorl tepal is inserted on the same radius as the bracteole. The outer tepal opposite the bracteole is the fi rst fl oral organ to initiate. -
Anatomy and Morphology of Fruiting Forms
Chapter 1 ANATOMY AND MORPHOLOGY OF FRUITING FORMS Jack Mauney,USDA-ARS, retired Jarman Enterprises, Mesa, AZ 85201 INTRODUCTION As a woody perennial cotton has the most complex vegetative and reproductive morphology of any annual crop grown. Its growth habit produces both vegetative and reproductive organs simul- taneously. The sympodial flowering pattern of the cotton plant causes a very complex production- distribution pattern of carbohydrate throughout the structure of the crop. Maximizing this produc- tion and distribution of energy is, of course, the goal of all growers’ and research effort. One of the earliest comprehensive descriptions of cotton plant morphology is that of J.M. Hector in INTRODUCTION TO THE BOTANY OF FIELD CROPS (1936) and the Russian monograph THE STRUCTURE AND DEVELOPMENT OF THE COTTON PLANT (Baranov and Maltzev, 1937). Mauney (1968, 1984, 1986) updated these descriptions based on anatomical details observed by Mauney and Ball (1959) which more accurately analyzed the association of the two branch buds found at the base of each leaf. More recently Oosterhuis and Jernstedt (1999) provided an overview of the morphology and anatomy of cotton No new observations which alter our understanding of the structure of the plant have developed over the decades since these earlier descriptions, therefore this review will use them to interpret several interesting features of highly productive modern cultivars. VEGETATIVE GROWTH The primary axis is the framework upon which the floral branches develop. This axis devel- ops only roots, stems, and leaves. Because cotton is an indeterminate perennial, it continues to produce additional numbers of these organs until some stress such as drought, freezing, nutrient deficiency, terminates growth (Fig. -
SPECIES IDENTIFICATION GUIDE National Plant Monitoring Scheme SPECIES IDENTIFICATION GUIDE
National Plant Monitoring Scheme SPECIES IDENTIFICATION GUIDE National Plant Monitoring Scheme SPECIES IDENTIFICATION GUIDE Contents White / Cream ................................ 2 Grasses ...................................... 130 Yellow ..........................................33 Rushes ....................................... 138 Red .............................................63 Sedges ....................................... 140 Pink ............................................66 Shrubs / Trees .............................. 148 Blue / Purple .................................83 Wood-rushes ................................ 154 Green / Brown ............................. 106 Indexes Aquatics ..................................... 118 Common name ............................. 155 Clubmosses ................................. 124 Scientific name ............................. 160 Ferns / Horsetails .......................... 125 Appendix .................................... 165 Key Traffic light system WF symbol R A G Species with the symbol G are For those recording at the generally easier to identify; Wildflower Level only. species with the symbol A may be harder to identify and additional information is provided, particularly on illustrations, to support you. Those with the symbol R may be confused with other species. In this instance distinguishing features are provided. Introduction This guide has been produced to help you identify the plants we would like you to record for the National Plant Monitoring Scheme. There is an index at -
The Seed Cone Eathiestrobus Gen. Nov.: Fossil Evidence for a Jurassic
American Journal of Botany 99(4): 708–720. 2012. T HE SEED CONE E ATHIESTROBUS GEN. NOV.: 1 F OSSIL EVIDENCE FOR A JURASSIC ORIGIN OF PINACEAE G AR W . R OTHWELL 2,3,6 , G ENE M APES 2 , R UTH A . S TOCKEY 3,4 AND J ASON H ILTON 5 2 Department of Environmental and Plant Biology, Ohio University, Athens, Ohio 45701 USA; 3 Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331 USA; 4 Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada; and 5 School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK • Premise of the study: Pinaceae and nonpinoid species are sister groups within the conifer clade as inferred from molecular systematic comparisons of living species and therefore should have comparable geological ages. However, the fossil record for the nonpinoid lineage of extant conifer families is Triassic, nearly 100 million years older than the oldest widely accepted Lower Cretaceous record for Pinaceae. An anatomically preserved fossil conifer seed cone described here extends the strati- graphic range of Pinaceae nearly 30 million years, thus reducing the apparent discrepancy between evidence from the fossil record and inferences from systematic studies of living species. • Methods: Material was prepared as serial thin sections by the cellulose acetate peel technique, mounted on microscope slides, and viewed and photographed using transmitted light. • Key results: A large cylindrical cone consisting of bract-scale complexes that diverge from the cone axis in a helical phyllotaxis has bracts and scales that separate from each other in the midregion and are of equal length and of nearly equal width. -
Reproductive Morphology
Week 3; Wednesday Announcements: 1st lab quiz TODAY Reproductive Morphology Reproductive morphology - any portion of a plant that is involved with or a direct product of sexual reproduction Example: cones, flowers, fruits, seeds, etc. Basic Plant Life cycle Our view of the importance of gametes in the life cycle is shaped by the animal life cycle in which meiosis (the cell division creating haploid daughter cells with only one set of chromosomes) gives rise directly to sperm and eggs which are one celled and do not live independently. Fertilization (or the fusion of gametes – sperm and egg) occurs inside the animal to recreate the diploid organism (2 sets of chromosomes). Therefore, this life cycle is dominated by the diploid generation. This is NOT necessarily the case among plants! Generalized life cycle -overhead- - alternation of generations – In plants, spores are the result of meiosis. These may grow into a multicellular, independent organism (gametophyte – “gamete-bearer”), which eventually produces sperm and eggs (gametes). These fuse (fertilization) and a zygote is formed which grows into what is known as a sporophyte - “spore-bearer”. (In seed plants, pollination must occur before fertilization! ) This sporophyte produces structures called sporangia in which meiosis occurs and the spores are released. Spores (the product of meiosis) are the first cell of the gametophyte generation. Distinguish Pollination from Fertilization and Spore from Gamete Pollination – the act of transferring pollen from anther or male cone to stigma or female cone; restricted to seed plants. Fertilization – the act of fusion between sperm and egg – must follow pollination in seed plants; fertilization occurs in all sexually reproducing organisms. -
Significance of Leaf Orientation and Bract in Seed Yield in Sunflower
SIGNIFICANCE OF LEAF ORIENTATION AND BRACT IN SEED YIELD IN SUNFLOWER G. C. SRIVASTAVA, P. S. DESHMUKH AND D.P.S. TOMAR Division of Plant Physiology Indian Agricultural Research Institute New Delhi-110012. Received on September 13, 1976 SUMMARY Defoliation experiments in sunflower (Helianthus annus L. var. EC 68413) have been shown that seed yield and the size of head are built up mainly by the photo synthate from the upper leaves and the bracts proximate to head. The contribution from the leaves varied with their position on the stem. It was noticed to be the highest from the top 6 to 8 leaves followed by middle leaves and least from the leaves at the bottom. INTRODUCTION Investigations on the physiology of grain production in crop plants have highlighted the importance of different plant parts as the coutributors of organic assimilates. In this context, orientation of the leaves in plant canopy plays a signifi cant role. It is well documented that in many grain crop the upperleaves translocate their photosynthates (assimilates) mostly to the developing grain and stem, the lower leaves to the root and tillers and the leaves in an intermediate position, may send the assimilate in either or both directions. (Wardlaw 1965; Rowson and Hofstra, 1969). It has been recorded that in wheat and barley, the flag leaf and also second and third leaf to lesser extent (Lupton, 1961; Wardlaw, 1967; Rowson & Hofstra, 1969) and in corn, leaves above the ear (Allison and Watson, 1966; Hoyt and Bradfield, 1962) contribute its assimilate to the grain. Ample evidence indicate that not only the leaves but other plant parts such as fruit wall in peas (Bhardwaj and Raju, 1972), sepals in cotton (Patil and Mensink, 1972) and ear itself in barley (Thorne, 1965) also significantly contribute their assimi late to grain.