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林业科学 ›› 2007, Vol. 43 ›› Issue (04): 59-65.doi: 10.11707/j.1001-7488.20070410

• 论文及研究报告 • 上一篇    下一篇

铝胁迫对感染丛枝菌根真菌的樟树幼苗生长的影响

闫明1,2,3,4 钟章成1,2,3   

  1. 1.西南大学生命科学学院,重庆400715;2.三峡库区生态环境教育部重点实验室重庆400715;3.重庆市三峡库区植物生态与资源重点实验室重庆400715;4.山西师范大学生物多样性研究所临汾041000
  • 收稿日期:2006-05-08 修回日期:1900-01-01 出版日期:2007-04-25 发布日期:2007-04-25

Effects of Aluminum Stress on Growth of Cinnamomum camphora Seedlings Inoculated with AMF

Yan Ming1,2,3,4,Zhong Zhangcheng1,2,3   

  1. 1. School of Life Science, Southwest University Chongqing 400715; 2. Key Laboratory of Eco-Environments of Three Gorges Reservoir Region, Ministry of Education Chongqing 400715; 3. Key Laboratory of Plant Ecology and Resources of Three Gorges Reservoir Region of Chongqing Chongqing 400715; 4. Institute of Bio-Diversity of Shanxi Normal University Linfen 041000
  • Received:2006-05-08 Revised:1900-01-01 Online:2007-04-25 Published:2007-04-25

摘要:

采用不同浓度的铝(Al)溶液胁迫接种和不接种丛枝菌根的香樟幼苗的方法,研究生长10周后的植株幼苗的形态、生物量以及不同器官的磷(P)含量和植物激素水平对环境胁迫的响应。结果表明:在Al3+浓度为0和0.5mmol·L-1的轻度胁迫下,接种植株的形态、生物量、P和植物激素水平等大部分指标要显著好于不接种的植株;而在Al3+浓度为8和15mmol·L-1的中、重度胁迫下,则略好或接近不接种的植株。菌根显著增加轻度和中度胁迫下植株叶片细胞分裂素(ZR)含量以及根部生长素(IAA)和ZR含量,降低叶片和根部脱落酸(ABA)含量;同时,樟树幼苗的形态、生长与P含量和不同器官植物激素含量之间显著相关。接种丛枝菌根给予植株一定的抗Al毒特性。

关键词: 铝, 丛枝菌根, 樟树, 生长, 植物激素

Abstract:

Mycorrhizal and non-mycorrhizal Cinnamomum camphora (camphor tree) seedlings were exposed to Al3+ levels of 0, 0.5, 8 and 15 mmol·L -1 in acid solutions for 10 weeks. We evaluated if arbuscular mycorrhizas (AM) and its host’ growth could be responsible for the tolerance to acid solutions with different Al3+ level. The results showed that as far as morphology and biomass of aboveground and belowground were concerned, mycorrhizal plants had higher resistance to Al than non-mycorrhizal plants with 0 and 0.5 mmol·L-1Al3+ in acid solutions; mycorrhizal plants appear better or similar with non-mycorrhizal plants with 8 and 15 mmol·L-1 Al3+ in acid solutions. Mycorrhiza significantly increased ZR contents of leaves and IAA & ZR contents of roots, decreased ABA contents of leaves and roots. At the same time, the index of growth, morphology and P content is significantly correlated with phytohormones contents in different organs. Our results indicated the AM fungal consortium confer Al resistance to camphor tree seedlings.

Key words: aluminum (Al), arbuscular mycorrhiza, Cinnamomum camphora, growth, phytohormone