Litsea coreana Levl.var.sinensis has developed four heteromorphic leaf types to adapt to the local environment.This study investigated functional traits of four heteromorphic leaf types associated with leaf morphology...Litsea coreana Levl.var.sinensis has developed four heteromorphic leaf types to adapt to the local environment.This study investigated functional traits of four heteromorphic leaf types associated with leaf morphology,anatomy,photosynthesis,and activity compounds,to elucidate their niche differentiation within a single tree.Lanceolate(La)type had the largest leaf length(LL=8.4 cm),leaf shape index(LSI=2.8),leaf perimeter(LP=18.5 cm),but low palisade tissue thickness(TPTT),light saturation point(LSP),and light compensation point(LCP),allowing them suited for varied positions and mild,humid climates.Ovoid(Ov)and orbiculate(Or)types had highest leaf thickness(LT=0.2 mm)and high TPTT(66.9 and 63.9μm),high chlorophyll(0.695 and 0.696 mg g^(−1)),high net photosynthetic rate(PNmax=8.1 and 6.6μmol m^(-2)s^(−1)),high total flavonoid content(TFC=45.2 and 47.7 mg g^(−1)),indicating their adaptation to top and edge canopy positions with high temperatures and light conditions.Oblanceolate(Ob)type had largest SLA(117.2 cm^(2)g^(−1))and high dark respiration rate(R_(d)),but low TPTT and chlorophyll,which is important for shade adaptation in the lower canopy.Overall,LSI increased with the increases of LL,the higher value of TPTT,the greater value of P/S(Palisade/Spongy)was observed,and as the increases of LSP,PNmax gradually increased.Three principal components were extracted with a cumulative contribution of 75.2%,of which the Ov type had the highest value.Our findings provided evidence that the presence of heteromorphic leaf types facilitates the utilization resources of different microhabitat by L.coreana Levl.var.sinensis.展开更多
蕲艾(Artemisia argyi Levl. et Van. var. argyi cv. Qiai)是闻名全国的中药材,湖北省道地药材,中国地理标志产品,在蕲春县种植面积达1.56万hm^(2)。文章进行了蕲艾本草考证,从道地性、品牌优势、生态种植模式、加工业、预防新型冠状...蕲艾(Artemisia argyi Levl. et Van. var. argyi cv. Qiai)是闻名全国的中药材,湖北省道地药材,中国地理标志产品,在蕲春县种植面积达1.56万hm^(2)。文章进行了蕲艾本草考证,从道地性、品牌优势、生态种植模式、加工业、预防新型冠状病毒肺炎疫情几个方面总结了蕲艾产业现状,分析了蕲艾产业存在的主要问题,并提出了相应对策。展开更多
基金supported by the National Natural Science Foundation of China(32060349)。
文摘Litsea coreana Levl.var.sinensis has developed four heteromorphic leaf types to adapt to the local environment.This study investigated functional traits of four heteromorphic leaf types associated with leaf morphology,anatomy,photosynthesis,and activity compounds,to elucidate their niche differentiation within a single tree.Lanceolate(La)type had the largest leaf length(LL=8.4 cm),leaf shape index(LSI=2.8),leaf perimeter(LP=18.5 cm),but low palisade tissue thickness(TPTT),light saturation point(LSP),and light compensation point(LCP),allowing them suited for varied positions and mild,humid climates.Ovoid(Ov)and orbiculate(Or)types had highest leaf thickness(LT=0.2 mm)and high TPTT(66.9 and 63.9μm),high chlorophyll(0.695 and 0.696 mg g^(−1)),high net photosynthetic rate(PNmax=8.1 and 6.6μmol m^(-2)s^(−1)),high total flavonoid content(TFC=45.2 and 47.7 mg g^(−1)),indicating their adaptation to top and edge canopy positions with high temperatures and light conditions.Oblanceolate(Ob)type had largest SLA(117.2 cm^(2)g^(−1))and high dark respiration rate(R_(d)),but low TPTT and chlorophyll,which is important for shade adaptation in the lower canopy.Overall,LSI increased with the increases of LL,the higher value of TPTT,the greater value of P/S(Palisade/Spongy)was observed,and as the increases of LSP,PNmax gradually increased.Three principal components were extracted with a cumulative contribution of 75.2%,of which the Ov type had the highest value.Our findings provided evidence that the presence of heteromorphic leaf types facilitates the utilization resources of different microhabitat by L.coreana Levl.var.sinensis.
文摘蕲艾(Artemisia argyi Levl. et Van. var. argyi cv. Qiai)是闻名全国的中药材,湖北省道地药材,中国地理标志产品,在蕲春县种植面积达1.56万hm^(2)。文章进行了蕲艾本草考证,从道地性、品牌优势、生态种植模式、加工业、预防新型冠状病毒肺炎疫情几个方面总结了蕲艾产业现状,分析了蕲艾产业存在的主要问题,并提出了相应对策。
