Effects of arbuscular mycorrhizal fungi alkaline phosphatase activities on

Trees ◽  
1999 ◽  
Vol 14 (3) ◽  
pp. 0113
Author(s):  
Tang Ming ◽  
Chen Hui
Keyword(s):  
Alkaline Phosphatase ◽  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Phosphatase Activities

Impact of arbuscular mycorrhizal fungi (AMF) on cucumber growth and phosphorus uptake under cold stress

2015 ◽  
Vol 42 (12) ◽  
pp. 1158 ◽  
Author(s):  
Jun Ma ◽  
Martina Janoušková ◽  
Yansu Li ◽  
Xianchang Yu ◽  
Yan Yan ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Plant Growth ◽  
Arbuscular Mycorrhizal Fungi ◽  
Cold Stress ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Root Colonisation ◽  
Cucumber Seedlings ◽  
Ambient Temperatures ◽  
Mycorrhizal Plants

Symbiosis with root-associated arbuscular mycorrhizal fungi (AMF) can improve plant phosphorus (P) uptake and alleviate environmental stresses. It could be also an effective mean to promote plant performance under low temperatures. The combined effects of arbuscular mycorrhiza and low temperature (15°C/10°C day/night) on cucumber seedlings were investigated in the present study. Root colonisation by AMF, succinate dehydrogenase and alkaline phosphatase activity in the intraradical fungal structures, plant growth parameters, and expression profiles of four cucumber phosphate (Pi) transporters, the fungal Pi transporter GintPT and alkaline phosphatase GintALP were determined. Cold stress reduced plant growth and mycorrhizal colonisation. Inoculation improved cucumber growth under ambient temperatures, whereas under cold stress only root biomass was significantly increased by inoculation. AMF supplied P to the host plant under ambient temperatures and cold stress, as evidenced by the higher P content of mycorrhizal plants compared with non-mycorrhizal plants. Thus, the cold-stressed cucumber seedlings still benefited from mycorrhiza, although the benefit was less than that under ambient temperatures. In accordance with this, a cucumber Pi transporter gene belonging to the Pht1 gene family was strongly induced by mycorrhiza at ambient temperature and to a lesser extent under cold stress. The other three Pi transporters tested from different families were most highly expressed in cold-stressed mycorrhizal plants, suggesting a complex interactive effect of mycorrhiza and cold stress on internal P cycling in cucumber plants.

Sign in / Sign up

Export Citation Format

Share Document