HISTOLOGICAL STUDIES ON THE MIDGUT OF THE
GAMMA IRRADIATED RED PALM WEEVIL, RHYNCHOPHORUS FERRUGINEUS (OLIVIER) COLEOPTERA: CURCULIONIDAE *

MOHAMED, H.F.

Biological Applications Department, Nuclear Research Centre,
Atomic Energy Authority, P.O. Box 13759, Abo-Zaabal, Egypt.

Key words: Fecundity, Fertility, Gamma radiation, Rhynchophorus
ferrugineus, Midgut

دراسات هستولوجية على المعى الأوسط لحشرة سوسة
النخيل الحمراء المعرضة لأشعة جاما

حسين فريد محمد

خلاصـة

تستهدف هذه الدراسة التعرف على تأثير الجرعتين الإشعاعيتين 10 و 15 جراى من أشعة جاما على التغيرات الهستولوجية الحادثة للمعى الأوسط لحشرة سوسة النخيل المعرضة للإشعاع.

أظهرت دراسة التأثيرات الهستولوجية للجرعتين على الجزء الأمامى للمعى الأوسط أن الخلايا الطلائية أخذت أشكال مختلفة مثل الشكل المستطيل والشكل المكعبى والشكل البيضاوى وكانت فى المجمل غير واضحة المعالم وكان تأثير الجرعة الأعلى 15 جراى أشد تأثيراً من الجرعة 10 جراى.

ABSTRACT

In the present study, histological structure of irradiated R. ferrugineus adult male midgut show the transverse sections of the anterior midgut of male adults irradiated with 10 and 15 Gy of gamma radiation. At 10 Gy, the epithelial cells of the stomodaeal valve are a mixture of enlarged cuboidal, oval, pear-shaped cells or undifferentiated but at the high dose 15 Gy, most of the cells were undifferentiated or seem to be diffused together. The cells appeared to rest on a basement membrane. This basement membrane and the circular muscle, which encircle the cells, were broken in some parts with the high dose (15 Gy). The second type of the epithelial cells was elongated columnar or cuboidal of swollen cells with amount of vacuoles appeared in the cytoplasm. The nuclei were rounded and located in the middle part of the cells; some of them appeared karyolysed or pyknotized. In some regions, two cells appeared combined together and few of old cells were ruptured from the apical margin of the cells. The cells of the regenerative crypts and the regenerative cells were swollen and vacuolated.