摘要
[目的]本文旨在研究石墨烯对林木生长的影响,为林木栽培提供新的技术手段。[方法]本文以白榆为材料,以蒸馏水为对照,测量了土壤中50 mg·L^-1石墨烯处理后白榆扦插苗新生器官的生物量、叶片生理特性、气孔性状、根系形态和根系活力等指标。[结果](1)与对照相比,石墨烯处理显著增加白榆扦插苗新生器官的鲜重和可溶性糖含量,而对叶片含水量没有显著影响;(2)石墨烯处理显著增加了白榆扦插苗叶片的净光合速率、蒸腾速率、气孔导度、胞间CO2浓度、PSII实际光化学效率(YII)和气孔密度,而叶片叶绿素含量、PSII最大光化学效率(Fv/Fm)没有显著变化;(3)石墨烯处理可以促进白榆扦插苗的根系生长,却没有改变根系活力。[结论]石墨烯处理促进白榆生长,一方面增加了白榆扦插苗叶片的气孔密度、气孔导度和胞间CO2浓度,从而提高叶片光合效率;另一方面促进了白榆扦插苗根系生长,从而增强其根系吸收能力。
[Objective]This study was developed to clarify the effects of graphene on the growth rate of elm seedlings and to provide new techniques for forest cultivation.[Methods]Elm seedlings(Ulmus pumila L.)were used as experimental material.The soil was treated with 50 mg·L^-1 graphene,and the biomass,leaf physiological characteristics,stomatal traits,root morphology,and root vitality of newly born organs of the seedlings were measured.The tape water treatment served as control group.[Results]The results showed that the fresh weight and soluble sugar content of leaves were significantly increased by graphene treatment,while the water content of leaves was not affected.the net photosynthetic rate,transpiration rate,stomatal conductance,intercellular CO2 concentration,actual photochemical efficiency of PSII(YⅡ),and stomatal density of leaves were significantly increased in graphene treatment,while the chlorophyll content and maximum photochemical efficiency of PSII(Fv/Fm)of leaves did not change.Graphene treatment could stimulate root elongation and significantly increase root fresh weight,total root length and total root surface area of elm cutting seedlings,but produced no effects on root vitality.[Conclusion]In conclusion,graphene treatment could promote the growth rate of elm cutting seedlings,increase stomatal density,stomatal conductance and intercellular CO2 concentration of leaves,thus improve the photosynthetic efficiency of plant.Moreover,graphene treatment could enhance the density of plant roots,thus increase the absorption capacity of root system.
作者
张晓
曹慧芬
赵建国
王海雁
姚建忠
王俐彤
张倩琦
马利娟
Zhang Xiao;Cao Huifen;Zhao Jianguo;Wang Haiyan;Yao Jianzhong;Wang Litong;ZhangQianqi;Ma Lijuan(Institute of Carbon Materials Science,Shanxi Datong University,Datong 037009,China;College of Life Science,Shanxi Datong University,Datong 037009,China;Sangganhe Test Bureau of Poplar High⁃yield Forest of Shanxi,Datong 037006,China)
出处
《山西农业大学学报（自然科学版）》
CAS
北大核心
2020年第4期97-103,共7页
Journal of Shanxi Agricultural University(Natural Science Edition)
基金
山西省石墨烯产业化应用技术协调创新中心(晋财教[2017]204号)
山西省石墨烯功能材料工程技术研究中心(201705D141034)
2018年山西省科技成果转化引导专项项目(201804D131041)
山西省高等学校科技创新项目(2019L0767)
山西省基础研究计划项目(201901D211437)
山西大同大学大学生创新创业项目(XDC2019232)。
关键词
石墨烯
白榆
扦插苗
生长
生理生化特性
Graphene
Elm
Cutting plantlets
Growth
Physiological and biochemical characteristics
