๐—ฆ๐˜‚๐—บ๐—บ๐—ฎ๐—ฟ๐˜† ๐—ผ๐—ณ 664 ๐˜๐—ต ๐—ฑ๐—ฎ๐˜† ๐—ผ๐—ณ ๐—–๐—ต๐—ฎ๐˜๐˜€๐—ต๐—ฎ๐—ฎ๐—น๐—ฎ(12/1/2022)

๐—ฆ๐˜‚๐—บ๐—บ๐—ฎ๐—ฟ๐˜† ๐—ผ๐—ณ 664 th ๐—ฑ๐—ฎ๐˜† ๐—ผ๐—ณ ๐—–๐—ต๐—ฎ๐˜๐˜€๐—ต๐—ฎ๐—ฎ๐—น๐—ฎ (12/1/2022)

We started the discussion about coralโ€ฆ

:diamonds:Rati have some practicals about coral in her college

:diamonds:What is corals???

:drop_of_blood:Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.

:drop_of_blood:Good example of coral is sea fan coral.

:drop_of_blood:connection between Corals and Hydra

:diamonds:Both of them are coming under same phylum Cnidaria

:drop_of_blood:Hydra is the one our model systemโ€ฆ

:diamonds:How can culture the Hydra in our Home labs???
What they eat???

*:diamonds:we need dechlorinated water for culturing Hydraโ€ฆ

:diamonds:Hydra is feed on moina ( it is an another model system ), Small insects

:diamonds:How will we get the dechlorinated water???

:diamonds:Why we are adding milk while culturing the moina???

Then back to the cnideranโ€™s discussionโ€ฆ

:drop_of_blood: Cnidarians have cnidoblasts, it present on the tentacles and the body, it is used to capture the pray.

:drop_of_blood:what is polyp and medulla???

:diamonds:Polyp and medusa are two different life cycle stages of many species of the phylum Cnidaria. The phylum Cnidaria includes species existing only in the polyp stage (Anthozoa), species existing in the medusa stage, and species with both life cycle stages (Hydrozoa).

:drop_of_blood:Polyp is represents the asexual stage.

:drop_of_blood:Medulla is represents the sexual stage

:diamonds:The asexual polyp generation alternates with sexual medusa generation
Example : Obelia

:diamonds:Obelia is a genus of hydrozoans, a class of mainly marine and some freshwater animal species that have both polyp and medusa stages in their life cycle. Hydrozoa belongs to the phylum Cnidaria, which are aquatic (mainly marine)

:diamonds:Similarities between Jelly fish and Hydra, coralโ€ฆ

:drop_of_blood:How does Hydra regenerate?:face_with_monocle:

:drop_of_blood:Do corals also regenerate?:thinking:

Some reference that taken from the chat box

:dart:Studies using cnidarian model species (especially the freshwater polyp Hydra and recently the sea anemone Nematostella) identified a suite of molecular and cellular mechanisms of regeneration, some of which are conserved across the animal kingdom. In addition to being excellent lab models, many cnidarian species have critical ecosystem building roles of global significance.

:dart:A coral โ€œgroupโ€ is a colony of myriad genetically identical polypshttps://en.wikipedia.org/wiki/Coral

:dart:Although it is extremely difficult to obtain and study live coral polyps in the classroom, hydras, freshwater cousins of corals, are readily available. Luckily, there are many similarities between these two animals, so studying hydras can help us understand more about corals. https://serc.carleton.edu/eslabs/corals/2a.html

:dart:A recent report based on molecular phylogeny shows the species relation-ships within the genus Hydra22 found across the globe. https://www.researchgate.net/publication/281457720_Description_and_phylogenetic_characterization_of_common_hydra_from_India

:dart:Molecular signature of an ancient organizer regulated by Wnt/ฮฒ-catenin signalling during primary body axis patterning in Hydra

:dart:Hydra is one of the few organisms that possess tremendous regeneration potential, capable of regenerating complete organism from small tissue fragments or even from dissociated cells. https://pubmed.ncbi.nlm.nih.gov/31598861/#:~:text=Hydra%20is%20one%20of%20the,understanding%20the%20process%20of%20regeneration.

:dart:One reference of coral regeneration shared by jai kishan sir

:dart:Seeingโ€™ without eyes: Hydra stinging cells respond to light
Date:
March 5, 2012https://www.sciencedaily.com/releases/2012/03/120305081421.htm

:dart:Pdf send by rati chaturvedi

others please add your points โ€ฆ

For culture hydra we have to culture moina first.

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So, how can culture the moina in our home labs?? @Rati113
What are things we needed for culturing???

We need a clean container with freshwater and few drops of milk which gives a favourable medium to grow bacteria, which is helpful for growing Moina. Then we have to cover the container with cotton cloth to prevent dust particle. Then we need moina itself and then it got multiple itself.

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