荒漠植物角果藜的地上地下结果性

对分布于准噶尔荒漠中角果藜(Ceratocarpus arenarius)果实的形态特征、空间位置、发育特性及散布特性进行了比较研究,结果表明:角果藜具有地上地下结果性,地上果实和地下果实在颜色、形状、大小、质量、数量、空间位置、成熟期和散布特性上均有显著差异。角果藜地上地下结果性是植物适应荒漠多变环境所具有的一种特殊的繁殖方式。这种独特的繁殖方式增加了物种在荒漠极端环境中成功生存的机率,保证了物种的顺利繁衍。这是首次在藜科植物中发现的地上地下结果性现象。

Amphicarpy of Ceratocarpus arenarius (Chenopodiaceae) in Junggar Desert

The fruits characteristics of Ceratocarpus arenarius were studied in the Junggar desert,including fruit(dispersal units)morphological characteristic,space orientation,development characteristic and dispersal characteristic.The results are as following:Ceratocarpus arenarius has amphicarpy,producing aerial fruits above the ground and subterranean fruits within the soil.The dimorphic fruits are different in color,shape,size,mass,number,space orientation,ripe period and dispersal characteristic.Amphicarpy of Ceratocarpus arenarius is an especial reproductive strategy for adapting to variable environment in the Jungger desert and ensures the species to successfully inhabit.The amphicarpy is first found in Chenopodiaceae.