Wu Di, Shi Jianwu, Peng Kou, Sheng Junqing, Wang Junhua, Wang Binhua, Hong Yijiang
School of Life Sciences, Nanchang University, Nanchang, China.
School of Life Sciences, Nanchang University, Nanchang, China; Key Lab of Aquatic Animal Resources and Utilization of Jiangxi, China.
Tissue Cell. 2017 Jun;49(3):440-446. doi: 10.1016/j.tice.2017.04.003. Epub 2017 Apr 14.
The period of gonads development was first studied from one to five years in the freshwater pearl mussel Hyriopisis schlegelii. It lasted for 36 months and was divided into three main stages: initiation of gonad formation, a stable growth phase, and a reproductive cell development phase. Each reproductive cycle consisted of five stages: proliferative stage (from late January to late February), growth stage (from late February to late March), maturation stage, spawning stage (from early April to late October) and recovery stage (from early November to late January). Interestingly, a hermaphroditic phenomenon was observed in this mussel for the first time, which appears during the development stage from 26 to 32 months. Male and female follicular tissues coexisted in hermaphrodite individuals with the male follicular tissue accounting for more than 90% of the whole gonad tissue. No hermaphroditic phenomenon was observed in matured gonad. We thus speculate that self-fertilization does not exist in H. schlegelii.
首次对三角帆蚌性腺发育时期进行了为期1至5年的研究。其性腺发育持续36个月，分为三个主要阶段：性腺形成起始期、稳定生长期和生殖细胞发育期。每个生殖周期包括五个阶段：增殖期（1月下旬至2月下旬）、生长期（2月下旬至3月下旬）、成熟期、产卵期（4月初至10月下旬）和恢复期（11月初至1月下旬）。有趣的是，首次在该蚌中观察到雌雄同体现象，这一现象出现在26至32个月的发育阶段。雌雄同体个体中雄性和雌性滤泡组织共存，雄性滤泡组织占整个性腺组织的90%以上。成熟性腺中未观察到雌雄同体现象。因此，我们推测三角帆蚌不存在自体受精现象。
