不同半夏属植物光合作用相关生理特征研究

Researches of Characteristics Related to Photosynthesis for Different Species in Penellia Tenore

半夏属植物多为重要的药用植物,其光合生理相关特征的探究对栽培生产、野生资源保护等具有重要意义。本文对半夏属的三个物种四种材料(半夏、盾叶半夏、绿叶型滴水珠和斑叶型滴水珠)进行了光响应曲线、光合色素含量及叶片下表皮气孔特征的比较研究。结果表明:半夏属植物都具有低光补偿点(≤23.72μmol光子·m^(-2)·s^(-1))、低光饱和点(≤775.12μmol光子·m^(-2)·s^(-1))、较高的表观光合量子效率(除半夏外都在0.05左右)、较低的叶绿素a/b比值(≤2.88)和较低的气孔密度(≤58.46个·mm^(-2)),都是典型的阴生植物。结果显示半夏属植物的栽培生产和资源保护需要进行适当的遮阴处理。

Species in Pinellia Tenore are generally important medicinal plants.Exploring about photosynthetic characteristics is of great significance for cultivation,production and wild resource protection for these species.Here,the light response curves,contents of photosynthetic pigment,and stomatal characteristics for four kinds of individuals from three species(P.ternata,P.peltata,green leaf type P.cordata and variegated leaf type P.cordata)were compared and studied.Results show that species in Pinellia tenore all possess low light compensation point(≤23.72μmol photon·m^(-2)·s^(-1)),low light saturation point(≤775.12μmol photon·m^(-2)·s^(-1)),highly apparent quantum efficiency(all except pinellia ternate were around 0.05),lower value to chl a/b(≤2.88),and low stomatal density(≤58.46 mm^(-2)).Pinellia spp.are typical shade plants.These result indicate that shading treatment is necessary for Penellia spp.culture and protection.