Effects of different salts on seed germination of Halogeton glomeratus under drought conditions
[Objective]Halogeton glomeratus,Halogeton glomeratus,a halophytic plant extensively found in salinized lands within the arid regions of the northwest,was chosen as the research object to investi-gate the impacts of various salinity levels on its seed germination and other phenotypic traits in arid condi-tions.[Method]The study utilized 6%polyethylene glycol 6000 to replicate drought conditions and con-ducted germination assays with varying concentrations of six salts,including neutral salts(NaCl,Na2SO4)and basic salts(NaHCO3,Na2CO3).Parameters such as germination potential,germination rate,plant height,dry and fresh weight,and root activity were assessed.Salt tolerance thresholds for each metric were identi-fied through regression analysis,cluster analysis,and principal component analysis,examining how drought and salinity stress impacted the germination of halophytes.[Result]The results demonstrated that as salt concentration increased,the salinity stress on seed germination and growth parameters of Halogeton glom-eratus exhibited a declining trend to differing extents in the PEG-6000 environment.The magnitude of de-crease was influenced by the salt type,with Na2CO3 displaying the strongest inhibitory effect followed by NaHCO3,NaCl,and Na2SO4.[Conclusion]In conclusion,this study initially unveiled the tolerance of halo-phytes to varying concentrations of sodium salt solutions within the 6%PEG-6000 environment,establish-ing salt tolerance thresholds ranging from 31.2 to 155.8 mmol/L.These findings offer a foundational under-standing and empirical support for investigating the salt tolerance mechanisms of Halogeton glomeratus.
Halogen glomeratusdrought and salt complex stressesseed germinationcomprehensive evaluation
万方数据
维普
