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Inoculation of Arbuscula Mycorrhizal Fungi Improved Water Supply in Aboveground Part of Bombax ceiba Seedling Under Drought Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年16
Page:
95-101
Research Field:
Publishing date:

Info

Title:
Inoculation of Arbuscula Mycorrhizal Fungi Improved Water Supply in Aboveground Part of Bombax ceiba Seedling Under Drought Stress
Author(s):
MA Kun1; YANG Jianjun2; LI Lu1; MA Huancheng1; WANG Yanqi1; WANG Ying1
(1.Key Laboratory of Biodiversity Conservation in Southwest China，State Forestry Administration，Southwest Forestry University，Kunming，Yunnan 650224；2.Dali Branch,Yunnan Institute of Forestry Inventory and Planning，Dali，Yunnan 671000)
Keywords:
Bombax ceiba L.; arbuscula mycorrhizal fungi; drought stress
PACS:
-
DOI:
10.11937/bfyy.20165147
Abstract:
The plants of Bombax ceiba always have a symbiotic system with arbuscular mycorrhizal fungi (AMF) in the dry-hot valley.To study weather the symbiotic system one of the key strategies when plants adapting to the drought stress,a series of pot experiment was carried out to determine whether the AMF could affect the growth and the physiological process in B.ceiba under drought stress.The data on the characteristics of water content，growth and physiology，biochemistry of the root，stem and leaf was analyzed.It turned out that plants could benefit from the symbiotic system under drought stress.Firstly，the inoculation of AMF could improve the growth.Under no drought stress，the amount of the dry weight of roots with inoculation of AMF was 2.2 times of those without inoculation.Simultaneously，under severe drought condition，the amount of dry weight of roots with inoculation of AMF was 2 times of those without inoculation of AMF.It indicated that inoculation of AMF enhanced the yield of the root system and increased the efficiency of water absorption.Secondly，inoculation of AMF was helpful to avoid the stem shrinkage under drought stress.It reduced the loss of water contained in stem.Under the serve drought stress，the amount of water content in the inoculated plants was 1.95 times of those without inoculation.So，inoculation of AMF contributed to improving the capacity of water absorption and containing.Thirdly，inoculation of AMF accelerated the accumulation speed of the contents of amino acid and MDA.The peak of their contents appeared 18 days earlier in inoculated plants than those in non-inoculated plants under several stress.The maximum contents of MDA and proline in inoculated plants were 1.5 times and 1.4 times of those without inoculation under drought stress.It was obvious that AMF significantly increased the penetration levels and reduced cell damages，and improved the water retention capacity of plant leaves.Therefore，it could be suggested that inoculation of AMF could improve the drought resistance in B.ceiba by increasing the plant growth and water absorption and retaining and accelerating the osmotic regulation by accumulating the MDA and porline.

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Last Update: 2017-08-31