摘要
为探究菊芋耐涝机制,以不淹水为对照,设0、3、9d等3个淹水时间,共6个处理,研究了淹水胁迫对本地白皮菊芋的生长形态和生理特性的影响.结果表明,淹水3、9d,菊芋的叶绿素含量、地上部干质量和地下部鲜干质量都显著低于对照;淹水3 d时,菊芋的可溶性糖含量、脯氨酸(Pro)含量和乳酸脱氢酶(LDH)活性均显著高于对照,分别比对照增加了 114.15％、449.02％、333.33％;淹水9 d时,菊芋的茎粗和过氧化物酶(POD)活性均显著高于对照,分别比对照增加了 11.23％、100.00％.说明本地白皮菊芋比较耐淹,通过提高其LDH活性进行乳酸发酵、提高POD活性、增加可溶性糖和Pro含量来适应淹水胁迫,使得植株少受或免受伤害.
Abstract
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.
维普
万方数据