Ultrastructure of carposporogenesis in the parasitic red alga Faucheocolax attenuata Setch. (Rhodymeniales, Rhodymeniaceae)

The endomembrane system during carposporogenesis inChondria tenuissima was studied using electron microscopy and histochemistry. Profiles of the nucleus are convoluted, resulting in a highly increased surface area. Stacked cisternae are found within the peripheral part of the nucleus. Vesicles, tubules and membrane bound fibrillar bodies occur within the nucleoplasm. The endoplasmic reticulum surrounds the nuclear envelope.

The endomembrane system of differentiating carposporangia in the red algaChondria tenuissima: Occurrence and participation in secretion of polysaccharidic and proteinaceous substances

The ultrastructure of the carposporophyte and carposporogenesis is described for the parasitic red alga Plocamiocolax pulvinata Setch. After presumed fertilization the zygote nucleus is apparently transferred to the auxiliary cell which initiates gonimoblast cell production. These gonimoblast cells differentiate into storage or generative cells. Storage gonimoblast cells (SGC) are large and multinucleate, contain large quantities of starch and are located nearest the auxiliary cell, when compared to the smaller uninucleate, devoid of starch, generative gonimoblast cells (GGC) that form terminal lobes of carpospores. In addition, compressed membrane bodies and annulate lamellae are common in these cells. During carposporophyte maturation the amount of starch in the SGC's decreases and eventually the auxiliary cell, as well as SGC's, degenerate. Generative gonimoblast cells (GGC's) cleave repeatedly to form carpospores which are interconnected by small pit connections. Stage one-carpospores are recognized by their elongated shape, the formation of small

Ultrastructure of the carposporophyte and carposporogenesis in the parasitic red alga Plocamiocolax pulvinata Setch. (Gigartinales, Plocamiaceae)

The ultrastructure of carposporogenesis for the red alga Gracilaria verrucosa (Huds.) Papenfuss is described. Carpospore differentiation proceeds through four developmental stages. The youngest carpospores are embedded within confluent mucilage and contain a large nucleus, few starch grains, äs well äs proplastids with a peripheral thylakoid. The second stage carpospores are recognized by the increased numbers of starch grains, the formation of small, straight-profiled dictyosomes which produce carpospore wall material and the presence of dark-staining bodies in the cytoplasm. Plastids form their internal thylakoid System. During the third stage, dictyosomes become curved and continue to produce vesicles which deposit more wall material or fuse with each other to form large fibrous vacuoles lying in the peripheral cytoplasm. Mature carpospores are surrounded by a two-layered carpospore wall with the outer layer representing compressed mucilage fibrils. Carpospore maturity is signalled by the massive production of cored vesicles produced by highly curved, hypertrophied dictyosomes.

Ultrastructure of Carposporogenesis in the Red Alga Gracilaria verrucosa (Gigartinales, Gracilariaceae)

Ultrastructure of carposporophyte development in the red alga gloiosiphonia verticillaris (cryptonemiales, gloiosiphoniaceae)

The ultrastructure of carposporogenesis in Gigartina teedii (Roth) Lamour. (Gigartinales, Rhodophyceae): auxiliary cell, cystocarpic plant.

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

E. Schnepf

Author Tools

Chat about Author

Papers

The ultrastructure of carposporogenesis in Gigartina teedii (Roth) Lamour. (Gigartinales, Rhodophyceae): auxiliary cell, cystocarpic plant.