当前位置：
X-MOL 学术
›
Plant Biol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Horizontal orientation of zygomorphic flowers: significance for rain protection and pollen transfer
Plant Biology ( IF 4.2 ) Pub Date : 2020-10-19 , DOI: 10.1111/plb.13197 Y.‐M. Yu 1 , X.‐X. Li 2 , D. Xie 3 , H. Wang 1
中文翻译：
合子花的水平方向：防雨和花粉转移的意义
更新日期：2020-12-26
Plant Biology ( IF 4.2 ) Pub Date : 2020-10-19 , DOI: 10.1111/plb.13197 Y.‐M. Yu 1 , X.‐X. Li 2 , D. Xie 3 , H. Wang 1
Affiliation
|
- Floral traits are recognized to have evolved under selection for abiotic and biotic factors. Complex zygomorphic flowers usually face horizontally. It has been proved that a horizontal orientation facilitates pollinator recognition and pollination efficiency, but its significance in adaptation to abiotic factors remains unknown.
- The floral orientation of Abelia × grandiflora naturally varies around horizontal (with an angle of −30 to +33° between the floral main axis and the horizontal). We examined whether three different floral orientations affected flower thermal conditions, response to rain and pollination.
- Results showed that floral orientation had no effect on diurnal variations in flower temperature. The anthers of all three flower orientations were wetted by rainfall, but the inclined upward‐facing flowers contained significantly more rainwater. The horizontal flowers received significantly higher visitation by hawkmoths and had a higher stigmatic pollen load. In contrast, the upward flower orientation reduced pollination precision, while downward‐facing flowers had decreased pollinator attraction.
- This study indicates that horizontal flowers may have evolved as a trade‐off between rain protection and pollination. Zygomorphic flowers that deviate from a horizontal orientation may have lower fitness because of flower flooding by rainwater and decreased pollen transfer.
中文翻译：
合子花的水平方向：防雨和花粉转移的意义
- 在选择非生物和生物因子后，人们认为花的性状已经进化。复杂的同形花通常面向水平。业已证明，水平方向有助于授粉媒介识别和授粉效率，但其在适应非生物因子方面的意义仍然未知。
- Abelia×grandiflora的花卉方向在水平方向上自然变化（花卉主轴与水平方向之间的角度为-30至+ 33°）。我们检查了三种不同的花向是否会影响花的热状况，对雨水和授粉的反应。
- 结果表明，花的取向对花温度的日变化没有影响。三种花型的花药都被降雨弄湿了，但朝上的倾斜花却含有更多的雨水。水平花受到鹰蛾的影响显着较高，并且花粉的花粉负荷较高。相反，向上的花朵定向降低了授粉的精度，而向下的花朵降低了授粉媒介的吸引力。
- 这项研究表明，水平花可能是在防雨和授粉之间进行权衡的结果。由于雨水淹没花粉和减少花粉转移，偏离水平方向的锯齿花的适应性可能较低。
京公网安备 11010802027423号