Silk Gland


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silk gland

[′silk ‚gland]
(invertebrate zoology)
A gland in certain insects which secretes a viscous fluid in the form of filaments known as silk; it is a salivary gland in insects and an abdominal gland in spiders.

Silk Gland

 

in certain arthropods, an organ that elaborates a secretion that on exposure to air hardens into silk threads. Silk glands are especially developed in spiders. They are located in the posterior part of the abdomen and open through numerous tiny tubules at the ends of the six colliculi. Spiders have several types of silk glands: they secrete silk for producing egg cocoons, for arranging various parts of a snare, and for forming a sticky secretion with which the spider traps its prey. Silk glands are also found in Tetranychoidea, Pseudoscorpionidea, and Embioptera.

References in periodicals archive ?
GDH activity was maximum in bodywall than silk gland suggesting the increased oxidation of glutamate, it shows that, oxidative deamination of amino acids can be envisaged.
on the synthetic activity of the silk gland in Bombyx mori (L).
A researcch emphasized on the effects of different varieties role on silk glands growth, cocoon characteristics and disease outbreak in larval stage [10].
In this investigation, Kokosa mulberry variety with best mulberry leaves quality did not showed positive effects on economic characteristics, effective rate of rearing and silk glands weight (P<0.
It is reported the effect of mulberry varieties on fecundity, silk glands and cocoon characteristics [13,14].
Results of this investigation showed that selection of suitable varieties had important effects on larval weight, silk glands weight and reproductive characteristics of silkworm hybrid 31 x 32 but it did not affect on cocoon weight, cocoon shell weight, pupa weight and cocoon shell ratio.
Since several types of silk glands are remodeled during a molt, they may not be fully operative in the days immediately after the molt (Townley et al.
Aside from the recent cytological studies in several species of spiders from Taiwan (Chen 1999) and the quantitative determination of genome sizes for 115 species of spiders by image analysis densitometry (Gregory & Shorthouse 2003), there have been few general studies of arachnid cytochemistry since the early reports by Millot (1926, 1949) on the histophysiology of many different types of cells from several species of spiders and the reports on the cytochemistry of silk glands of mygalomorph spiders by Palmer et al.
The ampullate silk glands of lycosid spiders are readily recognized by their size and characteristic morphology (Fig.
16) accumulation of reaction product is prominent in the zymogen granules of gut diverticula, the ducts of silk glands and the walls of the air pockets in the book lung (Fig.
As shown by previous cytochemical studies of silk glands in Antrodiaetus which is very distantly related to lycosids (Palmer et al.