High ecostoichiometric stability and accumulating SiO2 and NO3- as main physiological adaptive mechanisms for reed to adverse environments

作     者：JianJun Kang Fan Yang DongMei Zhang LiWen Zhao 

作者机构：Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Linze Inland River Basin Research Station Chinese Ecosystem Research NetworkNorthwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Minqin National Studies Station for Desert Steppe Ecosystem Gansu Desert Control Research Institute 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学(英文))

年 卷 期：2024年第16卷第5期

页      面：250-258页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Natural Science Foundation of China (42377470) the Natural Science Foundation of Gansu province, China (23JRRA589) the Planning Project of Gansu Science and Technology of China (20JR5RA087) the Youth Science and Technology Foundation of Gansu Province, China (22JR5RA085) 

主　　题：Adaptive strategy Desert oasis Gramineae Nutrients Stoichiometric characteristics 

摘      要：Previous studies have shown that nutrients accumulation played important roles in resisting to stress resistance of *** study examined the ecostoichiometric internal stability （EIS） of nutrients accumulation and,concomitantly identified the main resistant regulating substances and their contributions to stress resistance of reed （Gramineae） in arid desert *** （digging method） and soil samples （quartering method）) obtained from sand dune （SD）,desert steppe （DP）,interdune lowland （IL）,saline meadow （SM） and wetland （W） habitats were brought back to the lab for nutrients *** indicated that soil nutrients differed obviously,while reed maintained relatively stable ratios of SiO2:N,N:K,and P:K when the eco-environments changed in different ***,reed exhibits common adaptive characteristics by mainly accumulating large amounts of SiO2（122.6–174.0 g/kg） and NO3-（166.1–216.6 g/kg）,as well as moderate levels of soluble sugar （SS:24.0–55.0 g/kg）,which are mainly stored in leaves for stress *** contribution of ions to stress resistance was 80.03%–91.15%（with SiO2and NO3-accounting for 54.91%–63.10%）,whereas the contribution of solutes was only 8.85%–19.97%（with SS contributing to 5.14%–10.91%） in different *** findings suggest that maintaining relatively high EIS,while still accumulating SiO2and NO3-as main physiological regulators might be an effective strategy for reed to positively respond to adverse habitats,which provide a strong theoretical basis and technical reference for searching useful methods for restoration and reconstruction of the degraded ecosystems in desert oasis regions.