Pollen limitation, reproductive success and flowering frequency in single-flowered plants
Pollen limitation, reproductive success and flowering frequency in single-flowered plants
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单花植物的花粉限制、繁殖成功率和开花频率
DOI：
10.1111/1365-2745.12834
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发表时间：
2018
影响因子：
5.5
通讯作者：
An De-Jun
中科院分区：
文献类型：
--
作者：
Sun Hai-Qin;Huang Bao-Qiang;Yu Xiao-Hong;Tian Chang-Bao;Peng Qi-Xuan;An De-Jun
1.显花植物在花数上表现出显著的种间和种内变异，这强烈地影响了动物授粉植物的繁殖成功。然而，产生一朵花的生殖后果却知之甚少。2.在这里，我们测试，如果植物产生一个单一的花有繁殖劣势相比，植物产生多个花相结合的实地调查五个骗人的兰花和调查发表的文献。通过比较人工授粉和自由授粉的果实产量来估计花粉限制。多年来监测开花频率以评估产生一朵花的潜在优势。3.单花和多花的物种都受到强烈的花粉限制。然而，单花的品种有显着较低的坐果率和产生的种子少，虽然他们有一个显着较高的花粉去除比多花的品种。对兰科5个亚科中的4个亚科的28个种进行了独立于遗传学的比较，结果表明，座果率与花数呈显著正相关。在多花植物中，花粉去除和座果与花数呈正相关。4.合成.目前的数据和非遗传学独立的对比支持这一假设，即产生一个单一的花有生殖劣势。单花物种可能会通过多年的高开花频率来补偿雌性成功率低。这项研究提供了深入了解的成本和利益，生产一个单一的花在欺骗性兰花。
1. Flowering plants exhibit striking interspecific and intraspecific variation in flower number, which strongly influences the reproductive success of animal-pollinated.plants. However, the reproductive consequences of producing a single flower are poorly understood..2. Here, we test if plants producing a single flower have a reproductive disadvantage compared with plants producing multiple flowers by combining field investigation of five deceptive orchids and a survey of published literature. Pollen limitation was estimated by comparing fruit production between hand pollination and open pollination. Flowering frequency was monitored over years to assess the potential advantage of producing a single flower..3. Both single- and multiple-flowered species suffered strong pollen limitation. However, single-flowered species had significantly lower fruit set and produced.fewer seeds per individual, although they had a significantly higher pollen removal than species with multiple flowers. A phylogenetically independent contrast of 28 species representing four of the five subfamilies of Orchidaceae revealed that fruit set was significantly positively associated with flower number. Both pollen removal and fruit set had a positive relationship with flower number within the multipleflowered species..4. Synthesis. Current data and phylogenetically independent contrast support the hypothesis that producing a single flower has reproductive disadvantages. Singleflowered species may compensate for low female success through high flowering frequency over years. This study provides insight into costs and benefits of producing a single flower in deceptive orchids.