[Effect of sodium phytate on alkaline phosphatase (ALP) activity in intraradical hyphae of AM fungi and development of its extraradical hyphae].
In this paper, a pot experiment with three compartments was installed to study the effect of Na-phytate on the development and metabolic activity of AM fungi. Maize was selected as host plant and inoculated with arbuscular mycorrhizal fungus (Glomus intraradices), and different amounts of Na-phytate were applied into hyphal compartments. The results showed that the absorbed P in the shoots and roots of maize inoculated with AM fungi was 1-2 times higher than that of non-inoculated maize. The ALP activity in intraradical hyphae of AM fungi was significantly decreased, and the total hyphal density of AM fungi increased with applied Na-phytate. Observations suggested that the ALP activity in intraradical hyphae of AM fungi and the development of its extraradical hyphae could be regulated by Na-phytate. Additionally, AM fungi could enhance the plant's P absorption and utilization from native soil P and additive Na-phytate.
Feng
Haiyan
H
Key Laboratory of Plant Nutrition, MOA, Department of Plant Nutrition, China Agricultural University, Beijing 100094, China. haiyan-feng166@sina.com
Feng
Gu
G
Wang
Jingguo
J
Li
Xiaolin
X
D000469:Alkaline Phosphatase / Q000378:metabolism*; D005658:Fungi / Q000201:enzymology / Q000378:metabolism*; D025301:Hyphae / Q000201:enzymology / Q000378:metabolism*; D010833:Phytic Acid / Q000494:pharmacology*; D018517:Plant Roots / Q000382:microbiology; D003313:Zea mays / Q000382:microbiology*
D010833:Phytic Acid; D000469:Alkaline Phosphatase