橡胶苗不同器官渗透调节物质组成及其对渗透势的贡献  

Composition of osmotica in different organs of rubber seedlings and their contributions to osmotic potential

作　　者：程玉弯 安锋[2] 史静儒 谢贵水[2] 蔡靖 CHENG Yuwan;AN Feng;SHI Jingru;XIE Guishui;CAI Jing(College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100,China;Rubber Research Institute.Chinese Academy of Tropical Agricultural Sciences/Danzhou Investigation and Experiment Station of Tropical Crops of the Ministry of Agriculture and Rural Affairs,Danzhou,Hainan 571737,China)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]农业农村部儋州热带作物科学观测实验站/中国热带农业科学院橡胶研究所,海南儋州571737

出　　处：《热带生物学报》2022年第1期7-12,共6页Journal of Tropical Biology

基　　金：国家天然橡胶产业技术体系(CARS-33-ZP1);国家重点研发计划(2020ZDYF1000600)。

摘　　要：为研究橡胶苗不同器官渗透调节物质对渗透势的贡献及其与物质运输的关系,进而为进一步研究橡胶树不同器官渗透调节过程与光合作用、木质部—韧皮部水分平衡、胶乳产量等之间的关系提供依据,以橡胶树‘热研7-33-97’袋育组培苗为材料,测定了其根、叶渗透势和可溶性糖、游离氨基酸、有机酸、Ca^(2+)、Mg^(2+)、K^(+)、Na^(+)、NO3^(−)、Cl^(−)、P、S等渗透调节物质含量。结果表明,橡胶苗叶片中渗透调节物质主要由有机物组成,根部渗透调节物质主要由无机物组成,且橡胶苗叶片中的渗透调节物质总含量远高于其根部的;在根和叶中,可溶性糖、游离氨基酸、K^(+)、Ca^(2+)对渗透势的贡献虽不同但均为其主要渗透调节物质。Osmotic regulation plays an important role in maintaining plant turgor,protecting cell function,regulating water relationship and coping with environmental stresses.However,the osmotic regulators and their contribution to osmotic potential are different in different plant organs.Polybag tissue cultured rubber plants of clone Reyan 73397 were selected to determine the contents of osmatic regulators such as soluble sugar,free amino acid,organic acid,Ca^(2+),Mg^(2+),K^(+),Na^(+),NO3^(−),Cl^(−),P and S in the roots and leaves to analyze the contribution of the osmotic regulators to osmotic regulation.The results showed that osmotic regulators in the roots were mainly composed of inorganic substances,while osmatic regulators in the leaves were mainly composed of organic substances,the total content of which was much higher than those in the roots.The contents of soluble sugar,free amino acids,K^(+) and Ca^(2+) in the roots and leaves contributed differently to the osmatic potential,but they were the main osmotic regulators.

关 键 词：橡胶树 渗透调节物质 渗透调节 物质运输 

分 类 号：S794.1[农业科学—林木遗传育种] S718.43[农业科学—林学]