论文部分内容阅读
采用盆栽试验,设置土壤饱和含水量的90%~100%,80%~90%,60%~70%,40%~50%,20%~30%5个供水水平,研究水分胁迫对银柴胡生长及生理生化特性的影响。结果表明,随着土壤含水量的降低,银柴胡株高和地上部干重逐渐下降,而根长和根干重均表现为先升高后降低的趋势。随着土壤含水量的降低,脯氨酸含量先下降后明显升高,可溶性蛋白质含量逐渐下降;保护酶SOD和POD均表现为逐渐降低的趋势,CAT表现为先不变后降低的趋势;银柴胡叶片膜透性呈现出逐渐下降的趋势,而MDA含量呈现出先下降后上升的趋势。综上所述,在适度的干旱胁迫下银柴胡可以保持一定的抗渗透胁迫能力和清除活性氧的能力,进而保持膜的稳定。
A pot experiment was conducted to set up five water supply levels of 90% -100%, 80% -90%, 60% -70%, 40% -50% and 20% -30% of soil saturated water content. Effects of Growth and Physiological and Biochemical Characteristics of Hu. The results showed that with the decrease of soil water content, the plant height and above-ground dry weight of B. bidentata decreased gradually, while the root and root dry weight all showed the tendency of first increasing and then decreasing. With the decrease of soil water content, the content of proline decreased first and then increased, and the content of soluble protein decreased gradually. The activities of SOD and POD of protective enzyme decreased gradually, CAT decreased first and then decreased. Silver Membrane permeability of Bupleurum leaves showed a gradual downward trend, while the MDA content showed a downward trend first. In summary, under moderate drought stress, Bupleurum chinense L. can maintain a certain ability of anti-osmotic stress and scavenging reactive oxygen species, thereby maintaining membrane stability.