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Silk

Santhosh Kumar 03/11/2023

Silk mind map
Context
Researchers in China
Model proposal
Explain cocoon colour variations
Source: TH
Silk reeling
From cocoons of silk moth (Bombyx mori)
Classification based on feed
Domestication
Over 5,000 years ago
From wild moth (Bombyx mandarina)
In China
Types of silk
Mulberry
Long, fine, smooth threads
Non-mulberry
Shorter, coarser, harder threads
Mulberry Silk
Ancestral Species
Bombyx mandarina
Domesticated Species
Bombyx mori
Spread
From China, Korea, Japan, Russia
To around the world including India
Size comparison
Smaller in wild
Larger when domesticated
Fibre length
Shorter in wild
Up to 900 metres in domesticated
Cocoon colour range
From brown-yellow in wild
To various colours in domesticated
Yellow-red
Gold
Flesh
Pink
Pale green
Deep green
White
Flying ability
Exists in wild
Lost in domesticated
Pigmentation
Observed in wild
Lost in domesticated
India's silk production
2nd largest producer
After China
Non-mulberry silk
30% of India's silk production
Silk Colour
Carotenoids and flavonoids
In mulberry leaves
Absorbed by silkworms
Transport to silk glands
Bound to silk protein
Domesticated cocoons
Water soluble colour
Fades over time
Chemical compounds
Made by the mulberry leaves
Cocoon colour mutations
Responsible for different colours

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Categories: Biology

Tags: 3.11.2023, Newsbits

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