Morphogenesis of the silkworm egg.

نویسنده

  • J M Legay
چکیده

Ovarian follicle development, which accompanies morphogenesis of the silkworm egg has three distinct phases: spheric, ellipsoidal and flattened-ellipsoid. Transitions between phases are rapid and form-stability (characterized by length/width ratio) is preserved from the beginning of the ellipsoidal phase. The geometric stability of the follicle-oocyte-ovariole system, the polarity of the egg and the determinism in form changes reveal strikingly coordinated spatial and temporal organization.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Effect of Salicylic Acid on Commercial Traits of the Bivoltine Crossbreed Races of the Silkworm, Bombyx mori L.

Topical application with 100, 200 and 300 ng/ml phytohormone salicyclic acid on commercial traits was analysed in bivoltine CSR2, CSR4 and CSR2XCSR4 crossbreed races of the silkworm, Bombyx mori L. The results showed that there was significant increase in larval weight female cocoon weight, male cocoon shell weight, and hatching percentage with 100 and 200 ng/ml, silkgland weight, female cocoo...

متن کامل

Silkworm Egg Counting System Using Image Processing Algorithm - A Review

so production of silkworm from silkworm egg rapidly increasing. Success of sericulture as a cash crop depends on the vitality and disease freeness of the silkworm seed applied to farmer. Production of silkworm seed is not only free from diseases but having high heterosis. It is necessary to count silkworm egg accurately to avoid loss to silkworm egg production industry and farmers or grainges. ...

متن کامل

Effect of 12-hours delay and anticipation from traditional practice in silkworm mounting to spinning frames on economic traits of Bombyx mori (Lepidoptera: Bombycidae) cocoons

In this study, the aim was to determine the effect of 12 hours delay and time advancement of Bombyx mori larvae transfer to spinning frames on the economic traits of harvested cocoons. Our experience focused on the transfer of three lots of silkworm mature larvae to cocoon frames with 12 hours delay or advancement from usual spinning time. Commercial silkworm eggs were obtained and thr...

متن کامل

Role of Tasar Resham Dooth System in Accomplishing the Productivity, Quality and Self-Reliance in the Commercial Egg of Indian Tropical Tasar Silkworm, Antheraea mylitta Drury

The tropical tasarculture in India involve two and half lakh aboriginal families to produce vanya (tasar) silk by growing wild silk-insect as their cultural heritage and livelihood. However, the inadequacy in tasar commercial egg (on-time to match crop seasons) and quality, often results to uncertainty of silkworm rearing, hampering the crop economics and intensification of tasar industry. To o...

متن کامل

Improvement in economic traits of the silkworm Bombyx mori L. by exposure to ultrasound

The effect of ultrasound on important economic traits of the silkworm, Bombyx mori L., was studied in the laboratory. The silkworm eggs in blue-egg stage were exposed to ultrasound at 1 MHz and at an intensity of 9 W/cm 2 for 2 min, and the impact was examined on the economic traits of the silkworm. An elevatory effect was recorded with respect to egg hatchability, subsequent growth of larvae, ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of embryology and experimental morphology

دوره 36 1  شماره 

صفحات  -

تاریخ انتشار 1976