铝胁迫对2种辣椒叶绿素荧光参数及生理特性的影响.docVIP

铝胁迫对2种辣椒叶绿素荧光参数及生理特性的影响 摘要：用完全营养液培养的方法, 以赣丰一号辣椒和超级九号辣椒为实验材料, 通过模拟典型南方酸性土壤中的铝胁迫因子, 对这两种辣椒幼苗进行不同铝处理环境下的铝胁迫实验, 探讨各铝浓度对于这两种辣椒幼苗叶绿素荧光特性和生理特性的影响。实验设置四个铝处理浓度，分别为0（对照组），50μmol.L-1，100μmol.L-1，400μmol.L-1，每组设置三个重复组。结果表明，随着铝处理浓度的增加，2种辣椒的根长和株长均逐渐减小，赣丰一号的抑制率大于超级九号，表明赣丰一号更易受到铝毒害。另外，2种辣椒的根长减少的趋势比株长更明显，表明铝毒处理时，辣椒的根系更易受到伤害。但在低铝处理(50μmol.L-1)时2种辣椒的根长及株长相对对照组均略有增加，表明低铝处理有利于辣椒的生长。此外, 各项叶绿素荧光参数, 如最大荧光值( Fm )、原初光能转化效率（Fv/Fm）等均随着铝浓度的增加而降低, 而初始荧光( F0 )与上述指标的变化趋势相反, 并且超级九号的变化幅度小于赣丰一号，表明赣丰一号更易受到铝毒害。 关键词：铝胁迫；辣椒；荧光参数；生理特性 Effect of Aluminum Stress on Physiological Characteristics and chlorophyll fluorescence parameters of 2 kinds of pepper Abstract:Studying aluminium stress on two different pepper seedings. Methods:Using the complete culture medium to study the aluminium toxicity on chlorophyll fluorescence Characteristics and physiological characteristics of the experimental set of four aluminium value, 0(control group),50μmol.L-1,100μmol.L-1,400μmol.L-1 of Ganfeng One chili pepper and super nine pepper , each set repeats three groups. The result showed that with the increasing of the concentration of aluminum processing,the root length and strains of 2 kinds of pepper are gradually decreased.The inhibition rate of Ganfeng No.1 is higher than Super No.9, showing that Ganfeng No.1 is more vulnerable to Al toxicity.In addition,the downtrend of 2 kinds of pepper root is more obvious than strains,showing that under the aluminum processing,,the root system of pepper is more vulnerable.In addition,the chlorophyll fluorescence parameters,such as Fm (maximum fluorescence), Fv/Fm( Ratio of variable to maximum fluorescen) and others all decreased with the increasing concentration of Al ,while the F0 ( initial fluorescence) was just in the opposite.The magnitude of changes in Super No.9 were less than Ganfeng No.1,showing that Ganfeng No.1 is more vulnerable to Al toxicity. Key words:aluminum stress; pepper;physiological characteristics;physiologica