Armstrong D G
J Endocrinol. 1987 Feb;112(2):183-7. doi: 10.1677/joe.0.1120183.
Small non-atretic follicles (1.5-250 mg) were collected from four distinct areas of the ovary of the laying hen. These were as follows: the stalks of the two largest preovulatory follicles; the stalks of the third largest preovulatory follicle; the stalks of the fourth and fifth largest preovulatory follicle and zona parenchymatosa. There was an increase in the proportion of small follicles in the size range 1.5-10 mg collected from the stalks of the large yellow yolky preovulatory follicles approaching ovulation, with a corresponding decrease in the number of small follicles in the size group 10-250 mg. In addition, the ornithine decarboxylase activity in follicles collected from regions 1 and 2 was significantly greater than that in small follicles collected from region 4. Since the level of ornithine decarboxylase activity is critically dependent on the degree of hormonal stimulation and growth rate of the tissue, it is suggested, on the basis of the differences in their ornithine decarboxylase activity, that small follicles located on the stalks of the large yolky preovulatory follicles are stimulated by trophic hormones and growth factors to a greater degree than similarly sized follicles located elsewhere in the ovary. It is proposed that this increased stimulation may increase the chances of these small follicles being recruited into the hierarchy.
从小母鸡卵巢的四个不同区域收集了小型非闭锁卵泡（1.5 - 250毫克）。具体如下：两个最大的排卵前卵泡的柄；第三大排卵前卵泡的柄；第四和第五大排卵前卵泡的柄以及卵巢实质带。在接近排卵时，从大型黄色卵黄性排卵前卵泡的柄部收集的1.5 - 10毫克大小范围内的小卵泡比例增加，而10 - 250毫克大小组中的小卵泡数量相应减少。此外，从区域1和2收集的卵泡中的鸟氨酸脱羧酶活性明显高于从区域4收集的小卵泡。由于鸟氨酸脱羧酶活性水平严重依赖于激素刺激程度和组织生长速率，基于它们鸟氨酸脱羧酶活性的差异表明，位于大型卵黄性排卵前卵泡柄上的小卵泡比位于卵巢其他部位的同样大小的卵泡受到营养激素和生长因子的刺激程度更大。有人提出，这种增强的刺激可能会增加这些小卵泡被纳入卵泡等级体系的机会。
