CAJ | 학술논문

本实验以匍匐茎型克隆植物野牛草为材料，通过测定其在同质营养和3个斑块尺度的异质营养条件下生长指标、形态指标和叶绿素荧光参数的变化，研究野牛草对异质营养的表型可塑性反应。野牛草在尺度为25 cm×25 cm异质营养条件下会产生更多的分株、丛和分枝，积累更多的生物量，具有较高的Fv/Fm 和ΦPSⅡ，生长状况要好于其他营养条件，但根系长度和间隔子长度并没有明显的变化。结果表明，生理整合调控了野牛草的表型可塑性，提高了母株的叶绿素荧光特性，增加了克隆分株对养分的吸收、利用能力，使野牛草在异质营养条件下的生长状况好于同质营养条件，特别是在尺度为25 cm×25 cm的异质营养条件下效果更为明显。
본실험이포복경형극륭식물야우초위재료，통과측정기재동질영양화3개반괴척도적이질영양조건하생장지표、형태지표화협록소형광삼수적변화，연구야우초대이질영양적표형가소성반응。야우초재척도위25 cm×25 cm이질영양조건하회산생경다적분주、총화분지，적루경다적생물량，구유교고적Fv/Fm 화ΦPSⅡ，생장상황요호우기타영양조건，단근계장도화간격자장도병몰유명현적변화。결과표명，생리정합조공료야우초적표형가소성，제고료모주적협록소형광특성，증가료극륭분주대양분적흡수、이용능력，사야우초재이질영양조건하적생장상황호우동질영양조건，특별시재척도위25 cm×25 cm적이질영양조건하효과경위명현。
Phenotypic responses of ramets of the stoloniferous clonal plant Buchloe dactyloides in homogeneous nutrient and under three scales of heterogeneous nutrients were studied by measuring the growth,morphologi-cal characters of clonal ramets and the chlorophyll fluorescence characteristics of mother ramets.Compared with other nutrient treatments,the number of ramets,clumps and stolons,biomass,Fv/Fm andΦPSⅡ were higher in plots of heterogeneous nutrient at 25 cm×25 cm spacing.However,different nutrient conditions did not prompt significant differences in internode and root length.These results suggested that physiological inte-gration modifies phenotypic plasticity of clonal ramets for efficient absorption and utilization of nutrients,and increases the chlorophyll fluorescence of mother ramets in heterogeneous nutrient.These effects were more pronounced when the spacing was 25 cm×25 cm.