YU Wanwen,CAI Jinfeng,GAO Changzhong.Physiological Responses of Different Peach Rootstocks to Salt Stress and Their Salt Tolerance Evaluation[J].Northern Horticulture,2016,40(12):1-6.[doi:10.11937/bfyy.201612001]
不同桃砧类型对盐胁迫的生理响应及耐盐性评价
- Title:
- Physiological Responses of Different Peach Rootstocks to Salt Stress and Their Salt Tolerance Evaluation
- Keywords:
- peach rootstocks; salt stress; physiological response; diversity; salt tolerance
- 文献标志码:
- A
- 摘要:
- 以3种桃砧种质1年生嫁接苗为试材，研究了3种桃砧对盐胁迫生理响应的差异，并对8种桃砧种质进行了耐盐性评价。结果表明：随着盐浓度的增加和处理时间的延长，3种桃砧叶片受害症状逐渐加重，表现为质膜透性和Na+含量显著增加等生理响应；蒙古扁桃具有较强的渗透调节（可溶性糖和脯氨酸含量高）、离子平衡（Na+含量低，K+含量高）和抗氧化（SOD和POD活性高）能力，较好地控制Na+进入叶片，维持质膜的完整和稳定，表现出较强的耐盐性，毛樱桃与之相反，毛桃介于二者之间；基于叶片质膜相对透性、可溶性糖和游离脯氨酸含量、SOD和POD活性、叶中Na+和K+含量所计算隶属函数值进行综合评价，不同树种/品种的桃砧耐盐性排序为蒙古扁桃>山桃>GF677>毛桃>甘肃桃>陕甘山桃>“筑波5号”>毛樱桃。试验结果为桃砧种质耐盐性评价提供了评价指标，并为杂交育种和沿海滩涂发展桃树种植提供了耐盐性种质资源。
- Abstract:
- The experiment was conducted with one-year-old grafted seedlings of 3 tree species fitting for peach rootstock.The physiological responses of 3 tree species to salt stress were studied and their salt tolerances were evaluated.The results were as follows:their salt symptoms aggravated gradually with salt levels increasing and treatment time extension,and showed the physiological responses included plasma membrane permeability and Na+ content increasing. Amygdalus mongolica had strong abilities of osmotic adjustment,ion balance,antioxidant,so that it could well control Na+ entering leaf,and maintain plasma membrane integrity and stability.Based on the above, Amygdalus mongolica showed strong salt tolerance.But those of Cerasus tomentosa were contrary to Amygdalus mongolica ,and showed inferior salt tolerance;salt tolerance of Prunus persica was between Cerasus tomentosa and Amygdalus mongolica .Subordinative function values were calculated based on the following indexes:plasma membrane permeability,the contents of soluble sugar and free proline,SOD and POD activity,and the contents of Na+ and K+ in leaf.The 8 kinds of peach rootstock germplasms were comprehensively evaluated and their order of salt tolerance from strong to weak was Amygdalus mongolica , Prunus davidiana , Prunus amygdalus × Prunus persica (GF677), Prunus persica , Amygdalus kansuensis , Prunus davidiana var. potaninii Rehd, Pnmus persica ‘ tsuku-h-5 ’ , Cerasus tomentosa .The above results provided salt resistance evaluation indexes of peach rootstock germplasms,and did the salt resistance germplasm resources for breeding hybrid and planting peach tree in coastal tidal flats.
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备注/Memo
第一作者简介：郁万文（1979-），男，山东临沂人，博士，讲师，现主要从事经济植物抗性选育及培育等研究工作。E-mail:youeryuww@163.com.基金项目：苏北科技发展计划资助项目（BN2014137）；江苏高校优势学科建设工程资助项目（PAPD）。