Wang Xiaowen, Huang Lanjie, Gichira Andrew Wanyoike, Wang Xiaofan
Laboratory of Plant Mating Systems and Evolutionary Genetics, College of Life Sciences, Wuhan University, Wuhan, P.O. Box: 430072, Hubei Province, China.
College of Life Sciences, Hubei University, Wuhan, P.O. Box: 430072, China.
Saudi J Biol Sci. 2019 Feb;26(2):413-420. doi: 10.1016/j.sjbs.2018.11.014. Epub 2018 Nov 22.
To test the fitness-gain curve model proposes that cosexual plants adjust their sex ratios and resource allocation depending on their size. In this study, the monoecious species Sagittaria potamogetifolia was used as a model to determine the effects of plant size and density on gender modification and reproductive allocation.
Various traits, including flower number and plant biomass, were measured under four different artificially constructed population density treatments. More male flowers were produced than female flowers per individual at high densities, while the opposite trend was observed at low densities. This trend was particularly evident in the highest density treatment.
A trade-off was discovered between male-female sex allocations in the highest density treatment (40 individuals m). The allometric growth of reproductive organs compared with plant size was detected, as evidenced by the reproductive structures' biomass and flower numbers. However, in the highest density treatment, size was weakly negatively correlated with femaleness.
Thus, has a reproductive strategy that easily adjusts to different reproductive environmental densities.
检验适合度增长曲线模型，该模型提出雌雄同株植物会根据自身大小调整其性别比例和资源分配。在本研究中，以单性花物种野慈姑作为模型，来确定植株大小和密度对性别修饰及繁殖分配的影响。
在四种不同的人工构建的种群密度处理下，测量了包括花数量和植株生物量在内的各种性状。在高密度条件下，每个个体产生的雄花比雌花多，而在低密度条件下观察到相反的趋势。这种趋势在最高密度处理中尤为明显。
在最高密度处理（每平方米40株）中发现了雄雌性别分配之间的权衡。检测到生殖器官相对于植株大小的异速生长，生殖结构的生物量和花数量证明了这一点。然而，在最高密度处理中，大小与雌性呈弱负相关。
因此，具有一种易于适应不同繁殖环境密度的繁殖策略。
