XUE Xinping,LIU Jie.Effects of Water Stress on Biochemical Characteristics of Apple Seedlings[J].Northern Horticulture,2017,41(20):72-76.[doi:10.11937/bfyy.20170662]
水分胁迫对苹果幼苗生理特性的影响
- Title:
- Effects of Water Stress on Biochemical Characteristics of Apple Seedlings
- 文献标志码:
- A
- 摘要:
- 以盆栽“嘎啦”苹果幼苗为试材，研究了不同水分处理对其叶片相对电导率、过氧化物酶(POD)活性、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性、丙二醛(MDA)含量、根系活力的影响，以探讨“嘎啦”苹果幼苗对水分胁迫的生理适应特性。结果表明：叶片相对电导率、MDA整体上表现出逐渐上升的趋势，并都在胁迫18 d时达到最大值，分别为53.254%、15.325 mmol?g-1。POD、SOD、CAT活性以及根系活力均表现出先上升后下降的趋势。在发生水分胁迫早期，对苹果幼苗的伤害较小，随着时间的延长，苹果幼苗的生理指标变化较复杂，最终对苹果幼苗影响严重。表明“嘎啦”苹果具有一定抗旱能力，但持续干旱影响幼苗生长，应及时浇水。
- Abstract:
- Apple seedlings of ‘Gala’ in pot,were taken as materials,the effects of different water stress treatment on the relative leaf conductivities,POD activity,SOD activity,CAT activity,MDA content,root activity were studied with potted apple seedlings.In order to learn the physiological adaptability of apple seedlings of ‘Gala’ to water stress.The results showed that under water stress condition the relative leaf conductivities,MDA content,were increasing in general and reached the highest values of 53.254%,15.325 mmol?g-1,respectively at the 18th days,POD activity,SOD activity,CAT activity,root activity at first increased,then decreased.In conclusion,apple seedlings grew well under the early water stress,under the mid water stress seedlings showed a more complex process of change；under the late stage stress the seedlings seriously injured.It showed apple seedlings of ‘Gala’ drought tolerance,but it should be watered on time；otherwise their growth will be affected.
参考文献/References:
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备注/Memo
第一作者简介：薛新平(1963-)，男，本科，副研究员，现主要从事设施果树栽培技术等研究工作。E-mail：xxp 15834065878@163.com.