盐胁迫对獐毛叶绿素和有机溶质含量的影响  

Effects of Salt Stress on the Contents of Chlorophyll and Organic Solutes in Aeluropus littoralis var. sinensis Debeaux

作　　者：刘志华[1] 时丽冉[1] 白丽荣[1] 赵可夫[2] 

机构地区：[1]衡水学院生命科学系,河北衡水053000 [2]山东师范大学逆境植物研究所,济南250014

出　　处：《植物生理与分子生物学学报》2007年第2期165-172,共8页Journal Of Plant Physiology and Molecular Biology

基　　金：国家重点基础研究专项经费(No.G1999011700)资助~~

摘　　要：用含0-200mmol/L浓度NaCl的Hoagland培养液处理獐毛幼苗,处理14d后测定一些生理指标。结果表明,獐毛的生长受NaCl抑制的程度随盐浓度增加而增大。叶绿素a和b含量均随着盐度增大而逐渐升高,而Chla/Chlb比值呈下降趋势。獐毛体内有机溶质、氨基酸、有机酸和可溶性糖等含量随盐度增加而明显增大。另外,獐毛的有机物干重所占总干重的比例增大,同时渗透势降低。这些结果表明,獐毛能够对盐渍环境做出必要的响应,以维持正常的生理活动,从而表现出较强的耐盐能力。After seedlings of Aeluropus sinensis var. sinensis Debeaux were treated with different NaCl concentrations （0-200 mmol/L） for 14 days, some physiological indexes were measured. The higher the NaCl concentration, the more the growth of A. sinensis was inhibited （Table 1, Fig. 1）. The increase in root/shoot ratio suggests that the shoots are more sensitive to salinity than the roots （Fig. 4）. The diminished leaf area may reduce the transpiration rate, and the root mainly grew longitudinally, which may help the root to reach the water source under the high salinity conditions. Chl a contents increased, so did Chl b, but the Chl a/Chl b ratio declined （Fig.5）, which implies the stimulation of Chl a accepted from NaCl is smaller than that of Chl b. After salt treatment, the organic solute contents increased （Fig.6） （P〈0.05）, the proline, amino acids and soluble sugar contents increased more than organic acids （Figs.7, 8）, the increase in soluble carbohydrate may inhibit photosynthesis in feedback. The percentage of sucrose in soluble carbohydrates increased too （Fig.8）. Although the organic dry weight of whole plant declined （Fig.2）, the proportion of organic dry weight in total dry weight increased （Fig.3）, and the osmotic potential of plant cell juice declined （Fig.9）, which implies that the contribution of organic matter to osmotic adjustment increased with salinity. That is, A. sinensis had ability to tolerate salinity to a certain degree.

关 键 词：獐毛 NACL 生长 叶绿素 有机溶质 

分 类 号：S543.9[农业科学—作物学]