盐胁迫对早开堇菜生长及生理指标的影响

采用盆栽试验法,对早开堇菜进行不同浓度NaC1溶液盐胁迫处理,测定盐胁迫下早开堇菜的生长及叶片中丙二醛(MDA)含量、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性等指标,以探讨其耐盐能力.结果表明:随盐浓度和盐胁迫时间的增加叶片萎蔫程度、黄化程度加剧；叶片中MDA含量和POD活性基本呈上升趋势,其中MDA缓慢上升；POD活性先缓慢上升、后大幅上升；SOD活性呈现先上升后下降趋势.综合各观测指标认为,早开堇菜有较强的耐盐性,可在含盐量4 mg/g以下的土壤中正常生长.

Effects of Salt Stress on Growth and Physiological Characteristics of Serrate Violet

Serrate violet grown in pots were studied to understand their salt tolerance when they were treated with NaCl solution with distinctive concentrations.The plant growth and some indexes including MDA content,SOD and POD activities in the leaves was investigated and examined under salt stress conditions.The results showed that,with the increase of salinity and duration of treatment,both the MDA content and the POD activities kept increasing roughly;the MDA content increased slowly,while the POD activities increased slowly at first,then raised with greater range;the SOD activities had a trend to increase at the beginning and decrease afterwards.Based on all the indexes tested and the plant features observed in the field a conclusion could be made as follow:serrate violet could be considered as a plant with higher salt tolerance and can grow normally in the soil with the salinity concentration below 4 mg/g.