Physiological Characteristics of Different Elaeagnus angustifolia L.Provenances Under NaCl Stress
In order to further understand the physiological mechanism of Elaeagnus angustifolia L.salt trolerance, pot experiments were carried out to study effects of NaCl stress (NaCl concentration of 0,0.15 and 0.30 mol· L-1) and stress time (7, 30 and 60 days) on the biomass, root/shoot ratio and phsiological characteristics of different provenances of E.angustifolia L.(Alaer provenance and Yinchuan provenance).Results showed that biomass accumulation and chlorophyll content were gradually reduced with increasing NaCl concentration and stress time.After treated with salt for 30 days, the largest decrement of the biomass accumulation and chlorophyll content in leaves of Alaer E.angustifolia L.provenance was 36.92％ and 14.65％ , respectively, and 41.86％ and 37.07％ for Yinchuan provenance, respectively.With increasing of NaCl concentration, root/shoot ratio and MDA content increase gradully, and Alaer provenance had a lower increasement than that of Yinchuan provenance.Content of proline was significantly increased with increase of the NaCl concentration, but the creased rate of proline content decreased with extention of the stress time.At 7 days after salt treatment, soluble sugar content of E.angustifolia L.decreased with the NaCl concentration incraseing.With the extension of stress time, the soluble surgar content gradully converted to increase with increase of the salt stress.The soluble sugar content of Alaer provenance was increased by 36.69％ under the 0.3 mol· L-1 for 60 days, while Yinchuan provenance was only 7.27％.Therefore, the salt-tolerance of E.angustifolia L.seedlings from Alaer provenance is stronger than that from Yinchuan provenance.Salt-tolerant E.angustifolia L.provenance could better protect the chorophyll, maintain stability of the membrane system, and ability of osmotic regrlation, to ensure the biomass accumulation than salt-sensitive provenance.This provides a theoretical basis for screening excellent salttolerant E.angustifolia L.germplasm.
国家科技期刊平台
NSTL
万方数据
维普
