不同土壤水分条件下断茎处理对克隆植物结缕草表型可塑性的影响

通过断茎处理,研究在不同土壤水分条件下克隆植物结缕草的水分生理整合作用对表型可塑性的影响。结果表明,在土壤水分均质和异质环境下,与断茎处理相比,保持匍匐茎的连接对结缕草的形态学指标均有促进作用;断茎处理均降低了分枝强度;在土壤水分异质和均质环境下,在结缕草克隆植株内存在水分生理整合,而且整合的方向既有从基部到梢部的向顶传输,又有从梢部向基部的向基传输,即水分传输是双向的。

Effect of Different Soil Moisture and Severing Stolon on Clonal Plasticity in Zoysia japonica Steud,a Clonal Plant

The clonal plasticity of Zoysia japonica was studied through the treatments of different soil moisture and the experiments of stolon-severing and connection.In the environment with heterogeneous and homogenous soil moisture,in comparison with the severed stolons,several morphological indexes of the intact stolons were promoted.However,branching intensity was reduced in the stolon severing treatment.The water physiological integration existed under the environment with both heterogeneous and homogenous soil moisture.Water absorbed by roots translocated both acropetally and basipetally.