睫毛萼凤仙花响应土壤水分和竞争的表型可塑性

研究了睫毛萼凤仙花在干、湿两种土壤水分条件下和密、疏两种栽种密度条件下形态和生长的表型可塑性。睫毛萼凤仙花在土壤水分饱和条件下的形态参数和生物量积累都高于干旱条件,在稀疏栽植下的形态参数和生物量积累也高于密集栽种。睫毛萼凤仙花通过调整器官生物量分配和形态参数来适应不利的环境,但付出了减少后代数目的代价。睫毛萼凤仙花适宜在土壤水分充足、植株密度不高的生境中生长。

Phenotypic Plasticity of Growth and Morphology in Impatiens Blepharosepala Pritz. ex Diels Responds to Soil Water

The phenotypic plasticity,morphology,biomass accumulation and biomass allocation of Impatiens blepharosepala Pritz.ex Diels were studied in two soil water treatments and two competition treatments.Morphology parameters and biomass allocation in saturation soil water were both height than in drought.And the same parameters were higher in non-competition(low density plant) treatment than in competition treatment.It was the stress resistance by varying biomass allocation and morphology parameters,but for that,it decreased the numbers of its offspring.The overall results indicated that I.blepharosepala Pritz.ex Diels should grow in the habitat with enough soil water and low density plants.