吉林农业大学学报2016，Vol.38Issue(1)：63-68,6.DOI:10.13327/j.jjlau.2015.2789
低钾胁迫对西洋参某些生理特性的影响
Effects of Low Potassium Stress on Some Physiological Characters of Panax quinquefolius
摘要
Abstract
In order to investigate the effects of potassium on the physiological characters of Panax quinquefolius, on the basis of Hoagland nutrient solution, 4 treatments with different potassium con-centration (0, 0. 6, 2. 0 and 6. 0 mmol/L) were used to explore the changes of photosynthetic char-acteristics , carbon and nitrogen metabolism and active oxygen metabolism of Panax quinquefolius un-der potassium stress. Results indicated that chlorophyll a, chlorophyllb and total chlorophyll content increased initially and then decreased when potassium concentration increased and reached a peak at 2 mmol/L concentration, 12. 88,6. 96 and 19. 84 mg/g, respectively. When potassium concentration was increased, root activity increased. Root activity of Panax quinquefolius seedlings in high potassi-um group was 36. 91% higher than potassium deficient group. Potassium deficiencies significantly decreased content of soluble protein and soluble sugar. MDA and protective enzyme activities in-creased when potassium concentration declined. So the low potassium treatment decreased leaf physi-ological metabolism and restrained the growth of Panax quinquefolius seedlings.关键词
钾/西洋参/叶绿素/膜脂过氧化作用/抗氧化酶活性Key words
potassium/Panax quinquefolius/chlorophyll/membrane lipid peroxidation/antioxidi-ant enzyme activity分类
农业科技引用本文复制引用
徐成路,孙海,王秋霞,李乐,张亚玉..低钾胁迫对西洋参某些生理特性的影响[J].吉林农业大学学报,2016,38(1):63-68,6.基金项目
吉林省重点科技攻关项目(20150204053NY) （20150204053NY）
