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Protoctists?

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Protoctists?

Postby opuntia » Tue Jul 05, 2005 4:56 pm

What is protoctists? The meaning is not in the dictionary..the word came up as i was going through the plant life cycle.
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Postby ERS » Tue Jul 05, 2005 6:01 pm

are you thinking Protistas??

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Postby MrMistery » Tue Jul 05, 2005 8:43 pm

@ERS
According to current biosistematics protoctista=protista
@opuntia
The eukarya kingdom is divided into 4 kingdoms: Protoctista(Protista), Fungi, Animalia and Plantae.
Prtoctists are algea, protozoars, oomycets and mixomycets
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Postby ERS » Tue Jul 05, 2005 9:22 pm

been a while since I have studied them, thanks for the update!
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Postby MrMistery » Tue Jul 05, 2005 9:27 pm

The first kingdome Protista had only unicellular organisms in it(both procaryotes and eukaryotes). So when they redid the clasification, the renamed the kingdom protoctista(to avoid confusions). But in the present they are both accepted
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Re: Protoctists?

Postby strutter » Wed Jul 06, 2005 3:25 am

opuntia wrote:What is protoctists? The meaning is not in the dictionary..the word came up as i was going through the plant life cycle.


Protoctista's are single celled organisms. They live in watery environments. Examples of protoctista's are Slime moulds, Algae, and Yeasts
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Postby MrMistery » Wed Jul 06, 2005 5:58 pm

Not only single cell organisms. Never make that confusion. Multicellular algae and pseudofungus is also part of the Protoctisa kingdome
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Postby victor » Thu Jul 07, 2005 6:18 am

MrMistery wrote:@ERS
According to current biosistematics protoctista=protista
@opuntia
The eukarya kingdom is divided into 4 kingdoms: Protoctista(Protista), Fungi, Animalia and Plantae.
Prtoctists are algea, protozoars, oomycets and mixomycets


Eukarya kingdom is divided into 4 subkingdoms... :lol:
Yup, since the ancestor have a nuclei membrane..
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Postby Dr.Stein » Thu Jul 07, 2005 2:10 pm

According to the latest classification, there are 6 kingdoms of living things:
- Archaebacteria (Prokaryota)
- Eubacteria (Prokaryota)
- Protoctista a.k.a Protista (Eukaryota)
- Mycota a.k.a Fungi (Eukaryota)
- Plantae (Eukaryota)
- Animalia (Eukaryota)

Protoctista is a kingdom of unicellular organisms, which live solitary, colony, or in filament shape. The members of this kingsom is animal-like, plant-like, or fungus-like. That is the idea for a suggestion that Protoctista is the ancestor of the next kingdoms: Mycota, Plantae and Animalia.

The representative species for this suggestion is Euglena sp. It has a characteristic of animal: having 'eyes' and locomotion appandage, the flagella), but it also has a characteristic of plant: having chloroplast to mean photosynthesis. When light is available, they undergo photosynthesis; whereas when there is no light, they will phagocytosis materials from their surrounding.
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Postby MrMistery » Thu Jul 07, 2005 6:45 pm

Sorry, my mistake: i meant the eukarya domain is divided into 4 kingdoms.
Protoctista is a kingdom of unicellular organisms

For the 3rd time i think, there are multicellular protistas: most of the Rhodophytas: Gelidium, Gracilaria, Dasya, Porphira. Multicellular Chlorophyta: Spirogyra, Cladophora, Ulva, Chara
Only a few examples
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Postby Dr.Stein » Fri Jul 08, 2005 1:32 pm

Waaaks! :shock: I have no idea where my sentence "...However, it also includes multicellular organisms particularly belong to algae groups etc. etc...." Sorry, I must deleted it by accident :( :roll:
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Postby MrMistery » Fri Jul 08, 2005 6:58 pm

Haha... We all make mistakes... I am wrong at least once a week on this forum
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