弱光胁迫对大田长春花生物量分配及次生代谢的影响

以长春花（Catharanthus roseus(L.) Don.）为材料，研究了田间栽培长春花在全光和20%透光率下，经过一个生长季后生物量配置、抗氧化次生代谢产物和文朵灵、长春质碱、长春碱等目的活性物质含量的变化。研究结果表明，弱光条件显著抑制了长春花植株总生物量增长，特别是抑制了有性生殖的投入；弱光组叶片总酚和总黄酮含量显著降低，干重含量分别为对照组的62.50%和50.00%，原花青素含量则略有升高，但与全光组的差异不显著；弱光组叶片文朵灵和长春质碱含量显著高于对照组，长春碱含量略有上升但差异不显著,受生物量降低影响，3种生物碱的产量均显著下降。上述结果表明，长春花能够调控生理代谢以适应低光强环境，特别是文朵灵和长春质碱含量提升显著，林下低光强环境种植长春花可以满足土地资源充分利用和文朵灵、长春质碱优质原料的需求。

Effects of Low Light Stress on the Biomass Distribution and Secondary Metabolism of Catharanthus roseus

Under full exposure and 20% exposure to light,the field-cultivated Catharanthus roseus(L.) Don.was used to investigate the changes of biomass distribution,antioxidative secondary metabolites and contents of objective active products such as vindolin,catharanthine and vinblastine after a growing season.The results indicated that the total biomass of C.roseus was extremely restrained by the low light intensity,especially the investment of generative propagation;the contents of total phenolics and total flavon...