模拟降水量变化对防风(Saposhnikovia divaricata)幼苗光合特性及矿质营养积累的影响  

Influences of Precipitation Regimes on Photosynthetic Characteristics and Mineral Nutrient Accumulation of Saposhnikovia divaricate Seedlings

作　　者：战丽杰 李凌浩[2] 孟伟 徐伟[1] 韩晨静[1] 李宗泰 张宏宝[1] ZHAN Lijie;LI Linghao;MENG Wei;XU Wei;HAN Chenjing;LI Zongtai;ZHANG Hongbao(Cotton Research Center,Shandong Academy of Agricultural Sciences,Jinan Shandong 250100;State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093;Shandong Academy of Forestry,Jinan Shandong 250014)

机构地区：[1]山东棉花研究中心,山东济南250100 [2]中国科学院植物研究所植被与环境变化国家重点实验室,北京100093 [3]山东省林业科学研究院,山东济南250014

出　　处：《山东林业科技》2019年第5期6-12,17,共8页Journal of Shandong Forestry Science and Technology

基　　金：山东省自然科学基金（ZR2017BC034）

摘　　要：为研究降水量变化对防风(Saposhnikovia divaricata)幼苗光合特性及矿质营养积累的影响,采用盆栽实验,以防风幼苗为材料,模拟研究了正常降水(CK,施水量为309mm,参照防风种子采集地1979-2000年6-9月的总降水量)、增加降水30%(+W)和减少降水30%(-W)对防风幼苗光合特性及矿质营养积累的影响。结果表明:与CK和+W处理相比,?W处理防风幼苗的叶片叶绿素和类胡萝卜素含量显著增加,叶片净光合速率、气孔导度和表观叶肉导度(移栽后73d、102d和128d)显著提升;脯氨酸含量(叶片、叶柄和根)、氮含量(叶片、叶柄和根)、磷含量(叶片和根)、钾含量(叶片和叶柄)、钙含量(根)和硫含量(叶片)显著增加。在本实验条件下,减少降水处理能够使防风幼苗叶片光合作用及植株矿质营养含量维持在较高水平,有利于其生长发育,有利于防风幼苗初生代谢产物的积累。Anthropogenic activities are changing global precipitation regimes and result in many middle latitude arid and semiarid regions experiencing less precipitation and more extreme weather events.However,little is known about the response of photosynthetic characteristics and mineral nutrient accumulation in the medicinal herb Saposhnikovia divaricata.Therefore,we conducted a study on the effects of precipitation change on photosynthetic characteristics and mineral nutrient accumulation of S.divaricata seedlings.We carried out a greenhouse experiment in order to study the change of the photosynthetic characteristics and mineral nutrient accumulation in S.divaricata seedlings under three treatments of control(CK,normal water supply equal to 309 mm per four months),-30(-W)and+30%(+W)of the control water supply.Our results showed that compared with the CK and+W treatments,the-W treatment significantly enhanced chlorophyll and carotenoid contents in leaves,promoted net photosynthetic rate,stomatal conductance and apparent mesophyll conductance of leaves(73,102 and 128 days after transplanting),and increased proline content,nitrogen content,phosphorus content in leaves and roots,potassium content in leaves and petioles,calcium content in roots,and sulfur content in leaves.Our results suggested that,under experimental conditions,-W increased the photosynthesis and promoted the mineral nutrient accumulation of S.divaricata seedlings,which is conducive to its growth and development,and the accumulation of primary metabolites in S.divaricata seedlings.

关 键 词：降水 防风 光合特性 矿质营养 

分 类 号：Q948.1[生物学—植物学]