LI Xiao-dong,FAN Jun-feng,QIU Xing,et al.Effect of Exogenous Ca2+on Physiological Indexes inPoplar Seedlings Under Low Temperature Stress[J].Northern Horticulture,2015,39(11):55-59.[doi:10.11937/bfyy.201511015]
外源Ca2+对低温胁迫下杨树幼苗抗寒相关生理指标的影响
- Title:
- Effect of Exogenous Ca2+on Physiological Indexes inPoplar Seedlings Under Low Temperature Stress
- 文章编号:
- 1001-0009(2015)11-0055-05
- Keywords:
- poplar; Ca2+; low temperature stress; cold tolerance; membrane injury rate
- 分类号:
- S 792.11
- 文献标志码:
- A
- 摘要:
- 以“陕林4号”和“07-69×青1”为试材,分别用浓度为0、5、10、15、20 mmol/L的CaCl2溶液喷施杨树幼苗,4℃低温胁迫2 d后测定杨树幼苗的膜伤害率、丙二醛(MDA)含量、抗氧化酶(SOD和POD)活性以及可溶性蛋白质含量等生理指标,以探究低温胁迫下不同浓度外源Ca2+对杨树幼苗抗寒相关生理指标的影响。结果表明:在喷施10 mmol/L CaCl2的作用下,杨树幼苗的各项抗寒相关生理指标最优,可显著降低杨树幼苗的膜伤害率,减少丙二醛(MDA)含量,提高超氧化物歧化酶(SOD)活性和过氧化物酶(POD)活性,增加可溶性蛋白质含量。外源Ca2+可以有效提高杨树幼苗的抗寒能力,缓解低温胁迫对杨树幼苗的伤害。
- Abstract:
- The young seedlings of ‘Shaanlin No4’ and‘07-69×P.cathayana 1’ were used as experiment materials.In this research,CaCl2 concentrations of 0,5,10,15,20 mmol/L were sprayed before treated under 4℃ stress for 2 days.Then,physiological indexes including membrane injury rate,activities of antioxidant enzymes (SOD and POD),contents of MDA and soluble protein were measured to investigate the effect of different Ca2+concentration on cold tolerance related physiological indexes in poplar under low temperature stress.The results showed that membrane injury rate and MDA content were decreased under 10 mmol/L CaCl2 treatment,while antioxidant enzymes (SOD and POD) and soluble protein were increased significantly.In conclusion,it was made sense that exogenous Ca2+could effectively improve the cold tolerance of poplar seedlings and alleviate the damage caused by low temperature stress.
参考文献/References:
[1] 沈漫,王明庥,黄敏仁.植物抗寒机理研究进展[J].植物学通报,1997,14(2):1-8.
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备注/Memo
第一作者简介:李晓东(1991-),男,硕士研究生,研究方向为林业生物技术。E-mail:lixiaodong268@163.com.责任作者:樊军锋(1963-),男,博士,研究员,硕士生导师,现主要从事杨树良种选育和油松遗传改良等研究工作。E-mail:fanjf28@163.com. 基金项目:国家林业局林业公益性行业科研专项资助项目(201404113)。