繁殖是影响水生植物生存竞争、分布以及群落结构动态变化的关键因素。通过野外观察和室内试验,较详细地介绍了蓖齿眼子菜(Potamogeton pectinatus)的繁殖策略。研究结果表明:蓖齿眼子菜有性繁殖中具有水表和水下气泡两种传粉方式；种子发生量较大,但种子发芽率低,不到6%,种子繁殖对种群恢复贡献不大,其主要作用在于远程传播和保持持久的种子库。蓖齿眼子菜具有广泛而高效的无性繁殖系统，可以通过断株、根状茎、地上块茎、地下块茎、地上茎节以及叶腋基部进行繁殖，其中最重要的是地下块茎和根状茎，次年种群恢复主要来自于地下块茎和根状茎。此外，对采用蓖齿眼子菜进行沉水植被恢复与重建提出了建议。
Potamogeton pectinatus is a perennial submerged aquatic macrophyte with a parvopotamid growth form. It inhabits many different environments from the south to the north in China. According to observation in Dianchi Lake, P. pectinatus is a tolerant species with wide ecological amplitude and can survive in heavy polluted waters. Presently, Dianchi Lake has been seriously polluted. Cyanobacteria blooms were serious, which led to a low transparency. While the other submerged aquatic macrophytes have disappeared, this species still occurs in Dianchi Lake. This suggests that P. pectinatus must possess various survival strategies being worthy of further research. Reproduction is a key factor influencing survival, distribution and dynamic variation of community structure. In this paper, reproduction diversity of P. pectinatus was studied through experiment and observation in situ. The results showed that pollination of P. pectinatus is by way of bubble enveloping for flowers that are underwater and pollen floating when flowers are at the water surface in sexual reproduction. The fruit-set efficiency in P. pectinatus that are underwater was low, being only 6.41%, compared to 24.38% of flowers reaching the surface. Seed number of P. pectinatus in exposed, and sheltered or pond sites is 794, 1 627 and 2 140 per square meter, respectively. Seed germination rate of P. pectinatus was under 6% in Dianchi Lake. As a result, sexual reproduction is not important to regenerate populations of P. pectinatus. This species also possesses an extensive and effective system of asexual reproduction, through shoot fragments, rhizomes, stem tubers, root tubers and axillary shoot regeneration. The populations of this species are mainly produced from the root tubers and rhizomes. Asexual reproduction has a large contribution to population restoration during the next growth season. The main function of the seeds appears to be dispersal and long-term survival of the species. In addition, some suggestions for aquatic vegetation restoration by this species were put forward according to the results of experiment and observation.
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