Effects of waterlogging stress on growth morphology and physiological characteristics of jerusalem artichoke seedling
In order to explore the waterlogging tolerance mechanism of jerusalem artichoke(Helianthus tuberosus L.),a two-factor completely random design was adopted,the first factor was the waterlogging mode,and two levels of water-logging and non-waterlogging(control)were set,and the second factor was the waterlogging time,and three levels of wa-terlogging were set to 0,3 and 9 days,a total of 6 treatments were used to study the effects of waterlogging stress on the growth morphology and physiological characteristics of the local white bark jerusalem artichoke.The results showed that aboveground dry mass,underground fresh and dry mass of jerusalem artichoke seedlings were significantly lower than that of the control,as well as the chlorophyll content.The soluble sugarcontent,proline content and lactate dehydrogenase activity(LDH)of jerusalem artichoke seedlings were significantly higher than the control after 3 days of waterlogging stress,increased by 114.15％,449.02％and 333.33％,respectively.Stem diameter and peroxidase(POD)activity were sig-nificantly higher than the control after 9 days of waterlogging stress,increased by 11.28％and 100.00％,respectively.In summary,native white bark jerusalem artichoke was a waterlogging tolerant plant.It adapted to waterlogging stress by in-creasing LDH activity,POD activity,soluble sugar and Pro content,so that the plant was less harmed or protected from damage.
万方数据
维普
