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Effect of thyroxine on the different blood pictures of mulberry silkworm, Bombyx mori L. [electronic resource].

By:

Saad, I. A. I

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Language: English Summary language: Arabic Description: p.2191-2205Other title:

تأثير هرمون الثيروكسين على صورة الدم المختلفة لدودة الحرير التوتية [Added title page title]

Uniform titles:

Minufiya journal of agricultural research, 2010 v. 35 (6) [electronic resource].

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Full Text Article

In: Minufiya Journal of Agricultural Research 2010. v.35(6)Summary: Effect of feeding last instar larvae of mulberry silkworm Bombyx mori L. by leaves dipped in thyroxine hormone at 2.5 ppm was studied to determine the changes in blood picture as, blood volume (BV), Total haemocyte counts (THC), differential haemocyte counts (DHC) and absolute differential haemocyte counts (ADHC). Results showed that larvae fed on thyroxine presented an increase in BV during the feeding period, until early spinning and during prepupal stage. THC and AHC showed an Increase in treated larvae during the different developmental periods of the last larval instar. Daily changes of five haemocyte types were investigated as, prohaemocytes, plasmatocytes, coagulocytes, spherules and oenocytoides. Differential and absolute differentIal haemocyte counts showed changes and fluctuation during the different developmental periods of the last larval instar. Prohaemocytes showed an increase of DHC and ADHC during feeding and spinning period of treated larvae. Thyroxine improve silk production by increasing the DHC and the ADHC of spherule cells during spinning period In addition to enhancing the immune response of treated larvae by increasing the ADHC of plasmatocytes and coagulocytes during the most developmental periods. Oenocytoides showed their maximum increase of DHC and ADHC during the feeding period of treated larvae and during the end of spinning period and prepupal stage.

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Includes references.

Effect of feeding last instar larvae of mulberry silkworm Bombyx mori L. by leaves dipped in thyroxine hormone at 2.5 ppm was studied to determine the changes in blood picture as, blood volume (BV), Total haemocyte counts (THC), differential haemocyte counts (DHC) and absolute differential haemocyte counts (ADHC). Results showed that larvae fed on thyroxine presented an increase in BV during the feeding period, until early spinning and during prepupal stage. THC and AHC showed an Increase in treated larvae during the different developmental periods of the last larval instar. Daily changes of five haemocyte types were investigated as, prohaemocytes, plasmatocytes, coagulocytes, spherules and oenocytoides. Differential and absolute differentIal haemocyte counts showed changes and fluctuation during the different developmental periods of the last larval instar. Prohaemocytes showed an increase of DHC and ADHC during feeding and spinning period of treated larvae. Thyroxine improve silk production by increasing the DHC and the ADHC of spherule cells during spinning period In addition to enhancing the immune response of treated larvae by increasing the ADHC of plasmatocytes and coagulocytes during the most developmental periods. Oenocytoides showed their maximum increase of DHC and ADHC during the feeding period of treated larvae and during the end of spinning period and prepupal stage.

Summary in Arabic.

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