Altitudinal differences in flower traits and reproductive allocation
Altitudinal differences in flower traits and reproductive allocation
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DOI：
10.1078/0367-2530-00128
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发表时间：
2004-01-01
期刊：
影响因子：
1.9
通讯作者：
Körner, C
中科院分区：
文献类型：
--
作者：
Fabbro, T;Körner, C
我们测试了高山植物是否会增加吸引传粉者的努力，以弥补假设的传粉者在高海拔地区的稀缺性。一个三倍大的部分拍摄分配到花在高山植物（30种，2700米）相比，低地植物（20种，600米），而叶的质量分数没有不同的海拔高度。在高海拔地区，一个小三倍的部分拍摄被分配到茎，这是伴随着其功能的变化，从叶片支持光合作用在低海拔支持花在高海拔地区。虽然拍摄质量大规模减少在高海拔地区，显示面积和生物量的个别花是非常相似的，在两个海拔高度。所有的花一起吸引传粉者与大约相同的总显示面积相对于整体植物的大小，但一般高山植物保持他们的花更长。随着植物高度的降低，这导致了增加的自我遮蔽，这可能会导致高山植物碳增益的减少。野外调查的结果强调了高山植物异交的重要性及其优先于生长的地位。
We tested whether alpine plants increase their effort to attract pollinators to compensate for assumed pollinator scarcity at high altitude. A three times larger fraction of the shoot was allocated to flowers in alpine plants (30 species, 2700 m asl) compared to lowland plants (20 species, 600 m asl), while leaf mass fraction did not differ between the altitudes. At high elevation, a three times smaller fraction of the shoot was allocated to stems, which was accompanied by a change in its function from leaf support for photosynthesis at low altitude to support for flowers at high altitude. Although shoot mass is massively reduced at high altitudes, display area and biomass of individual flowers were remarkably similar at both altitudes. All flowers together attracted pollinators with about the same total display area relative to overall plants size, but generally alpine plants maintain their flowers longer. Together with decreased plant height this leads to an increased self-shading which is likely to cause reductions in carbon gain in alpine plants. The results of this field survey emphasize the importance of outcrossing in alpine plants and its priority over growth.