Girish Mahajan (Editor)

Polypedilum vanderplanki

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Covid-19
Kingdom  Animalia
Class  Insecta
Family  Chironomidae
Scientific name  Polypedilum vanderplanki
Phylum  Arthropoda
Order  Diptera
Genus  Polypedilum
Rank  Species
Polypedilum vanderplanki Polypedilum Wikipedia
Similar  Polypedilum, Non‑biting midges, Milnesium tardigradum, Pheropsophus jessoensis, Belgica antarctica

polypedilum vanderplanki


Polypedilum vanderplanki or the sleeping chironomid, is a dipteran in the family Chironomidae. It occurs in the semi-arid regions of the African continent (e.g. northern Nigeria and Uganda). Its larvae are found in small tubular nests in the mud at the bottom of temporary pools that frequently dry out during the lifetime of P. vanderplanki larvae. Under these conditions, the larvae's body desiccates to as low as 3% water content by weight. In the dehydrated state the larvae become impervious to many extreme environmental conditions, and can survive temperatures from 3 K to up to 375 K, very high (7000 gray) levels of gamma-rays, and exposure to vacuum. It is one of few metazoans that can withstand near complete desiccation (anhydrobiosis) in order to survive adverse environmental conditions. Slow desiccation (0.22 ml per day) enabled larvae to synthesize 38 μg trehalose/individual, and all of them recovered after rehydration, whereas larvae that were dehydrated 3 times faster accumulated only 6.8 μg trehalose/individual and none of them revived after rehydration. Late Embryo Abundant (LEA), anti-oxidant, and heat-shock proteins may also be involved in survival. This species is considered the most cold-tolerant insect species, able to survive liquid helium (-270 °C) exposure for up to 5 min. with a 100% survival rate when desiccated to 8% water content.

Polypedilum vanderplanki wwwpnasorgcontent105135093F5largejpg
Polypedilum vanderplanki Sleeping Chironomid About Sleeping Chironomid
Polypedilum vanderplanki NEMURIYUSURIKAEST System

Polypedilum vanderplanki African Midge39s Ability to Survive Extreme Conditions May Provide
Polypedilum vanderplanki Mechanism allowing an insect to survive complete dehydration and
Polypedilum vanderplanki Constraints of tolerance why are desiccationtolerant organisms so

References

Polypedilum vanderplanki Wikipedia


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