舟山新木姜子盐胁迫下生长变化及生理反应

Growth and Physiological Effect under Salt Stress of Neolitsea sericea

对1年生舟山新木姜子苗木进行盐胁迫(NaCl浓度分别为0、3、5、7 g/l)下生长量和生理指标的比较研究结果表明,随胁迫浓度的升高,舟山新木姜子苗高长量、叶绿素(Chl)含量分别下降;随着胁迫时间的延长,3 g/l处理的丙二醛(MDA)、游离脯氨酸有急速上升趋势,而5、7g/l处理则缓慢下降;所有处理的超氧化物歧化酶(SOD)都表现急剧下降趋势。方差分析(p<0.05)表明,受试苗木在7 g/l处理下生长受到抑制,达显著水平。舟山新木姜子能耐5 g/l处理,属于中度耐盐植物。

Study on increment and physiological indicators of 1-year Neolitsea sericea under salt stress （concentration of NaCl： 0g/l, 3g/l, 5g/l, 7g/l） showed that height grwoth and chlorophyll content decreased with increase of salt stress. Free proline and malondialdehyde（MDA） of seedlings under treatment of 3g/1 increased quickly along with the duration of treatment, but decreased slowly under that of 5g/1 and 7g/1. While superoxide dismutase（SOD） of each treatment decreased quickly. Analysis of variance showed that increment of N, sericea seedlings was inhibited under treatment of 7g/1 NaC1 and had remarkably correlation （p〈0.05）. The test showed that N. sericea could endure salt stress of 5g/l, medium salt-resistant.