共查询到2条相似文献,搜索用时 0 毫秒
1.
洪万树 《中国海洋湖沼学报》1992,(1)
The plasma cortisol and glucose concentrations were determined in mature female striped mullet (Mugil cephalus L . ) subjected to short term intense handling stress . The results indicated that plasma cortisol levels reached a peak 20 min after stress and declined gradually afterwards . The highest concentration of plasma glucose was observed 30 min after stress . The present study showed that the rise of plasma glucose was associated with the plasma cortisol levels . 相似文献
2.
The in vitro effects of steroids, human chorionic gonadotropin (HCG) and cyanoketone on germinal vesicle breakdown (GVBD)
of striped mullet (Mugil cephalus L.) oocytes were investigated. All concentrations of HCG (5,10,50 I.U./ml), progesterone and pregnenolone at the highest
concentrations(lug/ml) were moderately effective in inducing GVBD, whereas 17β-estrodiol, cortisol, testosterone, 11β-hydroxyandrostenedione
and 11-ketotestosterone did not stimulate GVBD. 17α, 20βdihydroxy-4-pregnen-3-one (17α, 20βdiOHprog) and deoxycorticosterone
(DOC) were the most potent steroids in stimulating final oocyte maturation. The results indicate that C21 hydroxylated steroids
are potent inducers of final maturation in mullet. Further, co-incubations with 17β-estradiol, cortisol and testosterone did
not alter the maturation-inducing effects of HCG or 17α,20βdiOHprog. Cyanoketone, a blocker of 3βHSD activity, was only partially
effective in blocking GVBD induced by HCG. This suggests that Δ5 (pregnenolone derived) and Δ4 steroids may be involved in
final oocyte maturation in this species. 相似文献