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首页> 外文期刊>International journal of plant sciences >REPRODUCTIVE SUCCESS OF THE GYNODIOECIOUS LOBELIA SPICATA LAM. (CAMPANULACEAE): FEMALE FREQUENCY, POPULATION DEMOGRAPHICS, AND LATITUDINAL PATTERNS
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REPRODUCTIVE SUCCESS OF THE GYNODIOECIOUS LOBELIA SPICATA LAM. (CAMPANULACEAE): FEMALE FREQUENCY, POPULATION DEMOGRAPHICS, AND LATITUDINAL PATTERNS

机译：雌雄同株山梗兰的繁殖成功。 （柬埔寨科）：女性频率，人口统计和纬度分布

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Premise of research. In gynodioecious species, female plants are often at a disadvantage due to their reliance on hermaphroditic pollen donation and lower attractiveness to pollinators. They may compensate for these disadvantages through greater reproductive output and progeny fitness; however, the level of female advantage may vary based on population demographics (i.e., female frequency and gender morph density), geographic location, and abiotic conditions (i.e., temperature and precipitation). Methodology. In 2008 and 2009, data on latitude, longitude, mean temperature and mean precipitation from May to July (growing season), female frequency, female density, hermaphrodite density, reproductive output (i.e., fruit set, seed number per fruit, seed biomass), seed germination, and female advantage in reproduction were collected for 11 populations of the gynodioecious prairie species Lobelia spicata Lam. (Campanulaceae) in Illinois. Pivotal results. Female plants were found to produce greater fruit sets, greater number of seeds per fruit, and heavier, better-germinating seeds than hermaphrodites, though these gender differences in reproduction varied among populations and between sampling years. Female frequency impacted the gender-based reproductive measurements; in particular, it was negatively correlated with fruit set. Female frequency within L. spicata populations was negatively correlated with latitude, with temperature the most likely driving force. Conclusions. Abiotic conditions such as high temperatures seem to favor the success of female plants within populations of L. spicata, either directly through differential resource allocation between genders or indirectly as a covariate for some other environmental factor (e.g., pollinator abundance/behavior), though experimental data are needed to support this assertion.
机译：研究前提。在雌雄同体的物种中，雌性植物由于依赖雌雄同体的花粉捐赠和对传粉媒介的吸引力较低而常常处于不利地位。它们可以通过增加生殖产量和后代适应性来弥补这些不利条件；但是，女性优势的水平可能会根据人口统计数据（即女性的频率和性别变体密度），地理位置和非生物条件（例如温度和降水）而有所不同。方法。 2008年和2009年，有关5月至7月（生长季节）的纬度，经度，平均温度和平均降水，雌性频率，雌性密度，雌雄同体密度，生殖产量（即，坐果，每个果实的种子数，种子生物量）的数据收集了11个雌雄同体草原物种Lobelia spicata Lam种群的种子发芽和雌性繁殖优势。 （蒲兰科）在伊利诺伊州。关键的结果。与雌雄同体相比，发现雌性植物产生更多的结实果实，每个果实的种子数量更多，并且发芽的种子更重，种子更好，尽管这些繁殖的性别差异在不同种群之间以及不同采样年之间有所不同。女性频率影响了基于性别的生殖测量；特别是，它与坐果呈负相关。穗状乳杆菌种群中的女性频率与纬度呈负相关，而温度是最有可能的驱动力。结论。非生物条件（例如高温）似乎通过植物之间的差异性资源分配，或间接作为某些其他环境因素（例如传粉媒介的丰度/行为）的协变量，间接地促进了穗状花序种群中雌性植物的成功。需要数据来支持此断言。

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