摘要
以溶液培养的三角叶滨藜(Atriplex triangularis)为材料,测定分析了在PEG诱导的渗透胁迫条件下,适量的NaCl对其光合作用和水分吸收的影响,以探讨环境溶液中NaCl对植物适应干旱的影响。结果表明,PEG诱导的渗透胁迫导致三角叶滨藜植株吸水困难、叶绿素含量降低、光合系统受损、生长受抑制、生物量减少;而在PEG渗透胁迫的处理液中添加10-40mmol·L-1NaCl可以明显降低植株水势和叶片渗透势,维持较高的细胞膨压,减缓PEG渗透胁迫对光合系统的破坏作用,保证相对较高的光合速率和生长速度,从而有效增强了三角叶滨藜对渗透胁迫的适应能力。
We investigated the effect of moderate NaCl on photosynthesis and water absorption in arrowleaf saltbush （Atriplex triangularis） under PEG-induced osmotic stress to understand the effect of NaCI on plant adaptation to drought stress. PEG-induced osmotic stress led to reduced water absorption and chlorophyll content, injured photosystem and growth and reduced biomass. The addition of NaCI at 10-40 mmol.L-1 could reduce water potential and osmotic potential, maintain a high turgor, alleviate the destructive effect of osmotic stress to the photosystem, ensure a relatively high rate of photosynthesis and plant growth, and thus increase the adaptability of the plant to osmotic stress.
出处
《植物学报》
CAS
CSCD
北大核心
2012年第5期500-507,共8页
Chinese Bulletin of Botany
基金
国家重点基础研究发展计划(No.2009CB421303)
关键词
三角叶滨藜
NACL
渗透胁迫
光合作用
水分吸收
Atriplex triangularis, NaCI, osmotic stress, photosynthesis, water absorption
