金山绣线菊在混合盐碱条件下胁迫因素与胁变指标的相关性研究

Research on Correlation of Stress Factors and Strain Indexe in the Salt-alkali Mixed Stress of Spiraea bumalda 'Gold mound'

将中性盐NaCl和Na2SO4、碱性盐NaHCO3和Na2CO3按不同比例混合,模拟出24种盐度、碱度各不相同的复杂盐碱条件,并对金山绣线菊进行盐碱混合胁迫处理。测定其存活率等8项胁变指标,并分析各种胁迫因素与诸项胁变指标间的相互关系。结果表明:胁变因素pH值、CO32-对所有胁变指标均表现出了极显著的相关性,除可溶性蛋白、可溶性糖外,其它6项胁变指标均与盐浓度有显著的相关性。Na+、盐浓度与各项胁变指标间的相关系数完全相同,二者间的相关系数为1,该试验的盐胁迫中盐度可完全代表Na+。

The Spiraea burnalda ＇Gold mound＇ were stressed with 24 kinds of mixed salts composed of NaCI,Na2SO4, NaHCO3 and Na2 CO3 at various proportions and differed in salinity and alkalinity each other. Eight strain indexes such as survival rate were determined. The relationships among the all acting factors and strain indexes were statistically analyzed each by each. The results showed that every strain indexes were very significantly related with the pH value and CO3^2- ;Except the concent of soluble sugar and soluble protein,six strain indexes were significantly related with salt concentration. Na＋ like salt concentration has the same relationship with all the strain indexes. The correlation coefficient between them was l, the salt concentration could instead of Na＋ in this experment.