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2 edition of effects of light on spore germination and gametophyte development in Polypodium vulgare L. found in the catalog.

effects of light on spore germination and gametophyte development in Polypodium vulgare L.

Norma Agnew

effects of light on spore germination and gametophyte development in Polypodium vulgare L.

by Norma Agnew

  • 195 Want to read
  • 31 Currently reading

Published .
Written in English


Edition Notes

Thesis (Ph.D.)--The Queen"s University of Belfast, 1980.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL20329477M

spore germination followed by cell divisions results in the production of. a gametophyte. club mosses. are so called because most produce strobili. the resurrection plant. all of the above. which statement is not true. the internode of a horsetail is . in bryophytes, the gametophyte is the dominant, recognizable stage of the life cycle and is the stage that carries out most of the plant's photosynthesis protenema The moss gametophyte that develops after spore germination is a branched, filamentous structure called a.

You will make observations on spore germination, gametophyte ontogeny,sexual maturation, fertilization, embryo growth and the development of the young sporophyte. You should be able to relate all of these events to the complete life cycle of a fern as well as to plants in general. A fungicide containing 50% metal copper applied in a concentration of – g/ ml Knop solution significantly inhibited the spore germination process in Athyrium filix-femina and Polypodium vulgare ferns. The highest concentration of fungicide in the first species inhibited germination completely. After 50 days of exposure to the Author: Liliana Cristina Soare, Alina Păunescu, Ponepal Cristina Maria.

  Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more! Abstract. The effects of temperature on the activation, glucose-induced germination, and outgrowth of Bacillus megaterium QM B spores were investigated. There was no evidence for discontinuities in the response of spores to temperature in these processes reflecting reported thermal anomalies in the physical structure of by:


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Effects of light on spore germination and gametophyte development in Polypodium vulgare L by Norma Agnew Download PDF EPUB FB2

THE EFFECTS OF SPORE AGE ON GERMINATION AND GAMETOPHYTE DEVELOPMENT IN POLYPODIUM VULGARE L, BY D. SMITH AND P. ROBINSON Botany Department, The Queen's University, Belfast, Northern Ireland {Received 19 June ) SUMMARY In the fern Polypodium vulgare L.

increasing spore age leads to a decline in spore viability. It isCited by: In the fern Polypodium vulgare L. increasing spore age leads to a decline in spore viability. It is suggested that the sigmoidal form of the survival curve is related to the fact that the spores of t Cited by: The inhibitory effect of UV light on spore germination was nullified by subsequent irradiation with red light for 24 h or darkness for 48 h followed by a brief red irradiation, indicating that the.

The aim of this study was to assess the effects of a fungicide (copper hydroxide with 50% metallic copper) (Co) and of an insecticide (bifenthrin g/l) (B) on spore germination and gametophyte.

of Polypodium lepidopteris Kunze (Pteridophyta, Polypodiaceae)) Polypodium lepidopteris is a terrestrial fern from coastal vegetation, and is used as medicinal.

This work analyzed the effects of pH, temperature and light levels on the spore germination and the relative growth rate (RGR) of young sporophytes. Fertile fronds. ABSTRACT. Dolichomitriopsis diversiformis is an endemic and threatened moss in eastern Asia.

In vitro culture and light microscopic observation were employed to study its developmental process from spore germination to the formation of young gametophyte, as well as effects of light and temperature on its spore germination and protonemal by: 1.

Lovis and Asplenium scolopendrium L. [= Phyllitis scolopendrium (L.) Newm.] revealed differences in their temperature requirements for germination and in their sexual development on soil. The germination responses of A. trichomanes and A. scolopendrium to culture temperatures of 10, 15, 20 and 25 °C were very similar and all spores were able Cited by:   Spores of the ferns, Dryopteris filix-mas, D.

paleacea and Polystichum minutum, sown on plain agar in quartz-distilled water, required several hours of red light in order to germinate. When, however, water agar was replaced by agar made up with a mineral nutrition medium, a single pulse of red light (about 1 min) was able fully to induce by: The effects of light and temperature (constant and fluctuating) on fern spore germination in Tectaria heracleifolia, Tectaria incisa, Tectaria mexicana, and Tectaria transiens were studied using plastic filters or filters made from leaves, both of which reduced the red:far red ratio (R:FR) and photon flux density (PFD) in different magnitudes.

Under filters, the PFD was constant Cited by: The effects of variations in nitrogen source upon spore germination and gametophyte growth of the eusporangiate fern Botrychium dissectum forma obliquum were investigated.

Spore germination and early gametophyte growth were directly related to the oxidation level of the supplied nitrogen source. According to Camloh & Gogala (), Camloh (, ) and Raghavan (), liquid media are superior to solid media for early gametophyte development, but the two media have a similar effect on spore germination.

In fern cultures, sterilization of spores is necessary before germination procedures (CamlohSimabukuro et al. swelling of the moss spore in the sugar solution without light as normal germination. Spores were germinated in blue as well as yellow light, but required 30 days instead of 20 days, the time required in yellow light.

No germination of fern spores in darkness at 30'C was obtained, contradictory to the work of Heald. To determine this, he. Fern spore germination gives rise to the rhizoid and protonemal cell through asymmetric cell division, and then develops into a gametophyte.

Spore germination is also a representative single-cell model for the investigation of nuclear polar movement, asymmetrical cell division, polarity establishment and rhizoid tip-growth. These processes are affected by Cited by: 9. The effects of different light intensities on spore germination and the growth of gametophyte of Ceratopteris thalictroides (L.) Brongn.

were studied. The results showed that the intensity of 2 lx is suitable for spore germination, the optimum point is at 4 lx. When the intensity is around 4 lx, the spores easily grow into hermaphrodites : Sun Xin, Zhu XuanLü, Zhang-Ying, Dai XiLing. Laboratory and field experiments involving Asplenium ruta-muraria L., Asplenium trichomanes L.

subsp. quadrivalens D.E. Meyer emend. Lovis and Asplenium scolopendrium L. [= Phyllitis scolopendrium (L.) Newm.] revealed differences in their temperature requirements for germination and in their sexual development on soil. The germination responses of A. trichomanes and A.

Cited by: Even though protonemal development of bryophytes has been well studied, it remains unknown whether interspecific competition among mosses species affects their early growth and development.

This study evaluated the effects of interspecific competition on in vitro germination and gametophyte development between each pair-wise combination from six common moss. Germination is the process by which an organism grows from a seed or similar structure.

The most common example of germination is the sprouting of a seedling from a seed of an angiosperm or addition, the growth of a sporeling from a spore, such as the spores of hyphae from fungal spores, is also germination. Effects of light irradiation on spore germination, spawn run, Effects of light on development and identification of blind mutants of Coprinopsis P.

Karst. were studied by Kamada et al (). study of spore germination was conducted with a light microscope. Original article Effects of selected fungicides on in vitro spore germination and vegetative growth of Ascosphaera aggregata MS Goettel GM Duke GB Schaalje, KW Richards Agriculture Canada Research Station, PO BoxMain, Lethbridge, Alberta, TIJ 4B1 (Received 8 August ; accepted 13 April ) Summary — Five fungicides were studied for their in vitro Cited by: 4.

Seed Germination. Seeds vary in the amount of light that they need to germinate, with some seeds requiring considerable sunlight and others germinating only in complete darkness. Still other seeds will germinate in light or darkness, and others' preferences depend on the time of year or fertility of the soil.

BIOCHEMISTRY OF FERN SPORE GERMINATION FIG. 1. Electron micrograph ofOnocleasensibilis spore germinated in the light for 2days. cw, cell wall; 1, lipid; p, protein; st, starch. x 30 25~ Un 4?, 0-Jo J-JuE I 0 0Jo0 o _J C I:1 20[ 10 10 sistently decreased (Fig. 2). Approximately 17% of the reserve lipid washydrolyzed bythe time the spore coat hadruptured Cited by: LIGHT EFFECTS ON TREE GROWTH AND SEED GERMINATION H.

A. BORTHWICK Crops Research Division, Agricultural Research Service U. S. Department of Agriculture, Plant Industry Station, Beltsville, Maryland Everyone knows that trees cannot grow without light, but not why they require light for processes besides photosynthesis.

What are some of these File Size: 2MB.mination initially inhibited germination and development, but resulted in equal or greater development by week six. Germination under 22/11°C was strongly inhibited by illumination, indicating an interaction between temperature and light sensing systems.

Keywords: abiotic effects, asymbiotic germination, illumination, Orchidaceae, Size: KB.