Soil salinity alters water relations, nutrient accumulation and partitioning in Seabuckthorn (Hippophae rhamnoides L.) seedlings
Taking two-year-old Seabuckthorn (llippophea rhamnoides L.) seedlings as material, a pot experiment was conducted to identify its ability to cope with the soil salinity effect in Qinghai saline and high-cold area, China. The results showed that both soil water potential (Ψs) and leaf water potential (Ψw) were obviously decreased with salinity increasing. The difficulty of drawing up water from soil by root was found and plant under salinity lowered tissue osmotic potentials to avoid the injury of osmotic stress. Root Na+content was 9.9, 16.2 and 18.9 times of the controls at 200. 400 and 600 mmol/l, respectively, indicating that it had no efficient capacity to restrict Na+movement to the aboveground parts. Both leaf Na+and leaf K+contents in the plants treated with 400 and 600 mmol/l NaCl were significantly higher than that treated with 0 and 200 mmol/l. The significant higher values of Na+/K+ratio in roots and leaves under saline conditions did not act as a strategy for improving salt tolerance. It is concluded that an increase of Ca2+, Mg2+, and Fe3+contents in the roots and leaves of H. rhamnoides seedlings might be the requirement of this plant for survival in saline soils.
Hippophae rhamnoides L. soil salinity water potential ion contents root leaf
QIN Jing HE Kang-ning
College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
国际会议
西安
英文
436-440
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）