| 吴会会,吴强盛.盐胁迫下AMF对枳实生苗生长及生理代谢的影响[J].中国南方果树,2023,52(6): |
| 盐胁迫下AMF对枳实生苗生长及生理代谢的影响 |
| Effects of arbuscular mycorrhizal fungi (AMF) on the growth and physiological metabolism of trifoliate orange under salt stress |
| 投稿时间：2023-08-04 修订日期：2023-08-28 |
| DOI： |
| 中文关键词: 丛枝菌根真菌（AMF） 盐胁迫 枳 抗氧化酶 耐盐性 |
| 英文关键词:arbuscular mycorrhizal fungi (AMF) salt stress trifoliate orange antioxidant enzyme activities salt resistance |
| 基金项目:湖北省科技创新行动计划项目（鄂农发〔2018〕1号）资助。 |
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| 中文摘要: |
| 为揭示丛枝菌根真菌（AMF）对增强枳实生苗耐盐性的作用，以期为盐渍土条件下提高柑橘生长提供依据。在正常水分和盐胁迫（100 mmol /L NaCl）下，研究接种Funneliformis mosseae对盆栽枳实生苗生长和生理代谢的影响。结果显示：接种AMF显著提高了盐胁迫下枳的株高、叶片数、总鲜重、二级和三级侧根数、根系总长、投影面积、表面积和体积；接种AMF还显著提高了盐胁迫下枳叶片中叶绿素a、叶绿素b和总叶绿素的含量，以及枳根系和叶片的蔗糖含量。此外，盐胁迫下接种AMF显著抑制了叶片MDA和H2O2以及根系H2O2和O2?－的积累，显著提高了盐胁迫下根系和叶片Cu/Zn-SOD、Mn-SOD、POD和CAT的活性以及根系Fe-SOD活性。本研究表明盐胁迫下接种AMF的植株维持了更高的植物生长、根系发育、光合色素、蔗糖含量和抗氧化酶活性，因而具有高的耐盐性。 |
| 英文摘要: |
| The objectives of the present study were to elucidate the effects of arbuscular mycorrhizal fungi (AMF) on salt resistance of trifoliate orange, which can provide theoretical basis for enhancing citrus growth under salinized soil conditions. The effects of Funneliformis mosseae on plant growth and physiological metabolism of trifoliate orange under well watered and salt stress (100 mmol/L NaCl) were investigated. The results showed that AMF inoculation represented significantly higher plant height, leaf number, total fresh weigh, secondary and third lateral root number, root total length, projected area, surface area and root volume under salt stress, as compared with non-AMF inoculation. The seedlings inoculated with F. mosseae produced significantly higher contents of chlorophyll a, chlorophyll b and total chlorophyll in leaves, and sucrose in roots and leaves than non-AMF seedlings under salt stress. Under salt stress, AMF inoculation had lower contents of root H2O2 and O2?－, and leaf MDA and H2O2 levels, and also observed higher activities of Cu/Zn-SOD, Mn-SOD, POD and CAT in leaves and roots, and Fe-SOD in roots than non-AMF seedlings under salt stress. This study showed trifoliate orange seedlings inoculated with AMF under salt stress maintained higher plant growth, root development, photosynthetic pigments, sucrose content and antioxidant enzyme activities, thereby, exhibiting high salt tolerance. |
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