physiological study of growth and reproduction among certain green Algae ...

by L. H. Tiffany in [Columbus

Written in English
Published: Pages: 98 Downloads: 652
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Subjects:

  • Algae.,
  • Plants -- Reproduction.,
  • Growth (Plants)

Edition Notes

Statementby Lewis Hanford Tiffany ...
Classifications
LC ClassificationsQK569.C6 T5 1923
The Physical Object
Pagination1 p. l., p. 65-98, 1 l.
Number of Pages98
ID Numbers
Open LibraryOL6664592M
LC Control Number24010971
OCLC/WorldCa15749615

Species of green algae that are closely related to embryophytes are classified as charophytes while the remaining green algae are classified as chlorophytes. Like plants, charophytes have chlorophyll a and b, store carbohydrates as starch, have cell walls consisting of cellulose, and . The loss of photosynthesis is frequently associated with parasitic or pathogenic lifestyles, but it also can occur in free-living, plastid-bearing lineages. A common consequence of becoming nonphotosynthetic is the reduction in size and gene content of the plastid genome. In exceptional circumstances, it can even result in the complete loss of the plastid DNA ([ptDNA][1]) and its associated. Sexual reproduction was an early evolutionary innovation after the appearance of eukaryotic cells. It appears to have been very successful because most eukaryotes are able to reproduce sexually, and in many animals, it is the only mode of reproduction. And yet, scientists recognize some real disadvantages to sexual reproduction. This suggested that the anisotropy of expansion was built into the growth process at a fundamental level. Therefore, most subsequent work on growth ignored the specific value of growth-rate anisotropy. Figure 1 Measurements of growth anisotropy. A. Plot of cell length versus diameter for two species of filamentous, green algae.

the study of plant growth structure physiology reproduction and pathology as well as their economic use and cultivation by humans. cyanobacteria. photosynthetic bacteria that are important as phytoplankton previously called blue green algae. experimental replication food web. a complex relationship among community of organisms that produce. Algae (/ ˈ æ l dʒ i, ˈ æ l ɡ i /; singular alga / ˈ æ l ɡ ə /) is an informal term for a large and diverse group of photosynthetic eukaryotic is a polyphyletic grouping, including species from multiple distinct ed organisms range from unicellular microalgae, such as Chlorella and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga. 2, water and mineral elements are needed for growth in the light. Nitrogen-fixing cyanobacteria are widespread among the filamentous, heterocyst forming genera (e.g. Anabaena, Nostoc) (Stewart, ). However, there are also several well documented examples of dinitrogen fixation among . The absence of gametes of the opposite sex can lead, in certain extreme cases to degradation of fertilisation and to the growth of new individuals from one of the two kinds of gametes. In any case, reproduction in algae generally occurs discretely and the specialised cells involved are difficult to see without a microscope.

Among the most important molecules for plant function are the pigments include a variety of different kinds of molecules, including porphyrins, carotenoids, and biological pigments selectively absorb certain wavelengths of light while reflecting others. The light that is absorbed may be used by the plant to power chemical reactions, while the reflected. Plant physiology is a subdiscipline of botany concerned with the functioning, or physiology, of plants. Closely related fields include plant morphology (structure of plants), plant ecology (interactions with the environment), phytochemistry (biochemistry of plants), cell biology, genetics, biophysics and molecular biology.. Fundamental processes such as photosynthesis, respiration, plant.   Green algae, Spirogyra (Chlorophyta), are found in a wide range of habitats including small stagnant water bodies, rivers, and streams. It is also found as a part of the vegetation found at the edges of large lakes and rivers. Spirogyra exists in a filamentous form which often forms masses that float near streams and ponds, buoyed by oxygen bubbles released during photosynthesis.

physiological study of growth and reproduction among certain green Algae ... by L. H. Tiffany Download PDF EPUB FB2

A- PHYSIOLOGICAL STUDY OF GROWTH AND REPRO-DUCTION AMONG CERTAIN GREEN ALGAE.*f LEWIS HANFORD TIFFANY Department of Botany, The Ohio State University. INTRODUCTION. Within the last decade or two the algae have assumed a position of increasing importance because of their relation to aquatic animals, particularly the fishes.

There can be no. A Physiological Study of Growth and Reproduction Among Certain Green Algae. By Lewis Hanford Tiffany. Abstract. Author Institution: Department of Botany, The Ohio State Physiological study of growth and reproduction among certain green Algae.

book Year: OAI identifier: oai: Author: Lewis Hanford Tiffany. A Physiological Study of Growth and Reproduction Among Certain Green Algae Tiffany, Lewis Hanford pp.

Article description | Article Full Text PDF (KB) Insect Food Habits and Vegetation Weiss, Harry B. Article description | Article Full Text PDF (KB) Additions to the Catalog of Ohio Vascular Plants for Abstract.

The present position of the algae in developmental physiology of plants is a unique one. Algae have served as material for some of the most penetrating investigations of certain general problems of plant development, particularly the role of the nucleus, the establishment of polarity, and the significance of the latter in by: 7.

Green algae are predominantly diverse in growth forms. Plant body in green algae shows evolutionary progression from simple to more complex types of construction. form of asexual reproduction. Green algae are predominantly diverse in growth forms.

Plant body in green algae shows evolutionary progression from simple to more complex types of construction. Pickett-Heaps JD () Green algae: structure, reproduction and evolution in selected genera, 1st edn. Kochert G () Effects of senescence on somatic cell physiology in.

The plant body breaks into several parts or fragments and each such fragment develops into an individual. This type of vegetative reproduction is commonly met within filamentous forms, e.g., Ulothrix, Spirogyra, etc.

The fragmentation of colonies also takes place in several blue green algae, e.g., Aphanocapsa, Aphanothece, Nostoc, etc. Algae - Algae - Reproduction and life histories: Algae regenerate by sexual reproduction, involving male and female gametes (sex cells), by asexual reproduction, or by both ways.

Asexual reproduction is the production of progeny without the union of cells or nuclear material. Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by. The following points highlight the three modes of reproduction in algae.

The modes are: 1. Vegetative 2. Asexual 3. Sexual. Mode # 1. Vegetative Reproduction: In this type, any vegetative part of the thallus develops into new individual.

It does not involve any spore. Blooms of blue-green algae (BBGA) can exhaust oxygen in the water and release toxins, which can severely affect the growth of other organisms.

Indeed blooms represent a prime agent of water quality deterioration [1], [2]. This book covers topics such as: evolution of sex and sexuality in algae; and, pigments in algae with their chemistry and the evolution of thallus in algae. absent According akinetes algae algal anisogamy antheridia apical arranged Asexual attached axis basal bearing becomes blue-green algae body Bold and Wynne branches brown called 5/5(9).

Concepts of Botany Algae (PDF 21P) This note contains explanation of algae, structure of alage and its classification. The contents of this documents are Dichotomous Key to Freshwater Algae, Groups of Cyanobacteria & Algae, Dinoflagellates, Euglenoids, Brown, Golden brown, and Yellow brown Algae.

rich domain among the amino-terminal peptide of its members. The polypeptides may be related to the identified process of sexual reproduction.

Chlorophyta Chlorophyta (green algae) includes about species of mostly aquatic photosynthetic eukaryotic organisms. Green algae contain chlorophylls a.

The optimal temperature range for phytoplankton cultures is °C. If temperatures are higher than 35°C, it can be lethal for a number of algal species, especially green microalgae. Temperatures that are lower than 16°C will slow down the growth of algae.

Light also has an effect on the growth of algae: it must not be too strong or weak. Selected green algae and bryophytes were surveyed for the presence of resistant biomass and the percentages of resistant cell wall biomass were quantitatively determined.

substantial physiological challenges and the potential benefit of high growth rates for species able to overcome those physiological hurdles.

Among the unusual aspects of. Harmful algal blooms are one of the consequences of the human impact on aquatic ecosystems, particularly the process of eutrophication. They can cause a variety of deleterious effects, including the poisoning of fish and shellfish, habitat disruptions for many organisms, water discolouration, beach fouling, and even toxic effects for humans.

Different physiological and molecular responses of the green algae Chlorella variabilis to long-term and short-term elevated CO2 Article in Journal of Applied Phycology January with 51 Reads. Phylum Chlorophyta: green algae ("chlor" - green, "phyta" - plant).

•The most closely related to plants, •Includes unicellular, colonial and multicellular forms. •Inhabit aquatic (mostly freshwater) and damp terrestrial environments. •Many of the simpler forms are symbionts, e.g. some lichens, •Alternation between haploid (asexual) and. Eutrophication resulting from harmful cyanobacterial blooms is a frequent nuisance phenomenon in freshwater lakes and estuaries around the world, posing a serious threat to aquatic ecosystems and human health [1, 2].Cyanobacteria thus constitute a global problem in freshwater ecosystems used for drinking water and recreational purposes [].The potential damage to water.

observed a higher photosynthetic or growth rate of macro‐ and mi ‐ croalgae for a certain N i ‐source; reflected, for example, by differ ‐ ent affinities to NH+ 4 and NO − 3 uptake, or changes in a broad range of physiological parameters related to the growth response to dif ‐ ferent nitrogen sources (Ale, Mikkelsen, & Meyer, Algae - Algae - Evolution and paleontology of algae: Modern ultrastructural and molecular studies have provided important information that has led to a reassessment of the evolution of algae.

In addition, the fossil record for some groups of algae has hindered evolutionary studies, and the realization that some algae are more closely related to protozoa or fungi than they are to other algae.

Therefore, comparison between diversified green hydra symbioses will also serve as useful materials for the study of the origin and the establishment of symbiosis. Taking together further coordinated investigations on both the two symbiotic system between green algae and hydra will provide an advance in the study of this field.

The green algae are among the major structural and photosynthetic constituents of desert crusts, along with cyanobacteria (often dominant), bryophytes, lichens, and fungi, and the physiology of these microscopic, single-celled green algae distributed within microbiotic crusts is practically impossible to study.

Introduction. Plants and animals are associated with their microbiota, a complex assortment of microorganisms. As example, in the human gut, bacteria play a major role in stimulating immune system development (Lee and Mazmanian, ; Littman and Pamer, ).Recently, the communication between gut microbiota and the central nervous system has been established (Mayer, ), along.

The green algae and land plants form a monophyletic lineage (the chlorophytes) that contains both protistan and higher taxa ([Graham, ][1]). An important issue regarding the evolution of this green lineage that still remains in question is the identity of the green algal (i.e.

flagellate). Cladophora (Figure ) is a green filamentous algae that is a member of the Ulvophyceae and is thus related to the sea lettuce (Ulva spp.). The genus Cladophora has one of the largest number of species within the macroscopic green algae and is also among the most difficult to classify taxonomically.

This is mainly due to the. Introduction. Seaweeds are increasingly viewed as an important alternative source of food, feed, fuel and livelihood for humans.

Global seaweed aquaculture has expanded at a rate of 8% per year in the past decade ().The combination of human population growth, stagnation in the world’s fisheries as a result of depleting fish stocks, and the high environmental impact of certain types of.

Physiology of the Fresh-Water Algae Physiology of the Fresh-Water Algae Krauss, R W By ROBERT W. KRAUSS5 Department of Botany, University of Maryland, College Park, Maryland From the viewpoint of the student of algal physiology, the topics which are justifiably part o f the field are so diverse as to preclude complete mastery.

All photosynthetic protists contain green chlorophyll but also contain other pigments (how you get the green, red, brown, and golden brown) A filamentous alga that lives in fresh water, often seen as the green scum on the surface of ponds and lakes.

Recent studies have indicated that nitrogen availability can be an important determinant of primary production in freshwater lakes and that herbivore growth can be limited by low dietary nitrogen availability. Furthermore, a lack of specific essential nitrogenous biochemicals (such as essential amino acids) might be another important constraint on the fitness of consumers.

3 Sexual Reproduction Zygotic Meiosis Major groups of Freshwater Algae {Homework for Monday Nov. 10{For your particular group of algae be able to describe: zType of body forms present (illustrate) zColor and Pigmentation present zStorage product present zType of cell covering zType(s) of reproduction that occur Algal Groups 1.

Cyanobacteria; Cyanophyta; Cyanophyceae.Rather, green-algal eggs or zygotes are usually released into the water, so that fertilization and zygote devel opment are physically independent of the parent plant. The haploid and diploid components of green-algal life cycles can have no nutritional or developmental inter relationships.

Green algae thus lack embryos, a funda.Green algae contain chlorophylls a and b. They are in the division Chlorophyta. This is the largest and most diverse group of algae. It is found mostly in freshwaters and also on land (rocks, trees, and soil).

The structures are single cells (Micrasterias), filamentous algae, colonies (Volvox), and leaf-like shape (Thalli). Terrestrial plants.