Morphometrical Characterization of Green Hydra Symbiosis
نویسندگان
چکیده
منابع مشابه
Temporal relationships of host cell and algal mitosis in the green hydra symbiosis.
In fed hydra or excised regenerating peduncles there are increases in the mitotic indices of both digestive cells and the symbiotic algae that reside within them. Conversely, algal and digestive cell mitotic indices decrease in starved hydra. The temporal relationships of algal and host cell division differ in fed hydra and regenerating peduncles. After feeding, algal and digestive cell mitotic...
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Stable endosymbiosis depends upon balanced growth of the symbionts. In green hydra, coincident patterns of host and algal mitotic index suggest that coordinated reproduction provides for balanced growth. However, when hydra shrink during food shortage, the population of endosymbiotic algae in a green hydra must likewise decline in size. Thus far, no mechanism of reducing the size of the endosym...
متن کاملQuantitative morphometrical characterization of human pronuclear zygotes.
BACKGROUND Identification of embryos with high implantation potential remains a challenge in in vitro fertilization (IVF). Subjective pronuclear (PN) zygote scoring systems have been developed for that purpose. The aim of this work was to provide a software tool that enables objective measuring of morphological characteristics of the human PN zygote. METHODS A computer program was created to ...
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1979. Effects of food quality on growth of a stream detritivore, Paratendipes albimanus (Meigen) (Diptera: Chi-ronomidae). Ecology 60: 57-64. Abstract-Symbiotic Chlorella isolated from green hydra by simple techniques of homogeni-zation and centrifugation have been found to be contaminated with comparatively large amounts of animal debris. Additional washing with sodium dodecyl sulfate (SDS) re...
متن کاملThe Effect of Norflurazon on Green and Brown Hydra
Individuals of green (sort S1J-J1) and brown (sort S1M-K1) hydra were treated with five concentrations of aqueous solution of norflurazon (2x10-4, 2x10-5, 2x10-6, 2x10-7 and 2x10-8 mol/L; SAN 9789, Sandoz, Switzerland) in the laboratory conditions (21o C, photoperiod 10 hs daylight and 14 hs dark) in subacute exposure for 21 days. They were compared to the control groups of organisms. For morph...
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ژورنال
عنوان ژورنال: Folia Biologica
سال: 2017
ISSN: 0015-5497
DOI: 10.3409/fb65_3.159