TY - JOUR
T1 - Arbuscular Mycorrhizal Fungi Alleviate Ozone Stress on Nitrogen Nutrition of Field Wheat
AU - Cui, Xiangchao
AU - Hu, Junli
AU - Lin, Xiangui
AU - Wang, Fayuan
AU - Chen, Ruirui
AU - Wang, Junhua
AU - Zhu, Jianguo
N1 - This work was supported by the National Natural Science Foundation of China (No. 40771202), the International Cooperation Key Project of Chinese Academy of Sciences (No. GJHZ0748), and the Global Environment Research Fund of Japanese Ministry of Environment (No. C-062).
PY - 2013/9
Y1 - 2013/9
N2 - The nitrogen (N) nutrition, crop yield, and responses of wheat to arbuscular mycorrhizal fungi (AMF) were tested in an experimental field under free-air ozone concentration [O3] enrichment (FACE) conditions. The experiment included three treatments: ambient [O3] (Ambient), elevated [O3] (FACE, targeted at ambient [O3]×1.5), and elevated [O3] inoculated with an AMF consortium consisting of several Glomus species (FACE+AMF). AMF inoculation responsiveness of wheat was estimated by comparing plants grown in unsterilized soil inoculated with the exogenous AMF and in untreated soil containing indigenous AMF. Compared with the Ambient, relatively higher N contents but lower shoot biomasses of wheat plants were observed in the FACE treatment without AMF inoculation from the tillering stage in February and heading stage in April, respectively, which significantly (P< 0.05) decreased grain yield by 28% at harvest in June. Under the FACE condition, compared with the non-inoculated treatment, AMF inoculation significantly (P< 0.05) increased root colonization rates both at the tillering stage and heading stage, and also significantly (P< 0.05) increased shoot biomass at the heading stage and, hence, significantly (P< 0.05) increased grain yield by 40% at harvest. However, AMF inoculation significantly (P< 0.05) decreased total N content in wheat shoots at the tillering stage, suggesting that AMF consortia may enhance plant tolerance to elevated [O3] by elevating root colonization rate rather than plant total N content at early growing stages.
AB - The nitrogen (N) nutrition, crop yield, and responses of wheat to arbuscular mycorrhizal fungi (AMF) were tested in an experimental field under free-air ozone concentration [O3] enrichment (FACE) conditions. The experiment included three treatments: ambient [O3] (Ambient), elevated [O3] (FACE, targeted at ambient [O3]×1.5), and elevated [O3] inoculated with an AMF consortium consisting of several Glomus species (FACE+AMF). AMF inoculation responsiveness of wheat was estimated by comparing plants grown in unsterilized soil inoculated with the exogenous AMF and in untreated soil containing indigenous AMF. Compared with the Ambient, relatively higher N contents but lower shoot biomasses of wheat plants were observed in the FACE treatment without AMF inoculation from the tillering stage in February and heading stage in April, respectively, which significantly (P< 0.05) decreased grain yield by 28% at harvest in June. Under the FACE condition, compared with the non-inoculated treatment, AMF inoculation significantly (P< 0.05) increased root colonization rates both at the tillering stage and heading stage, and also significantly (P< 0.05) increased shoot biomass at the heading stage and, hence, significantly (P< 0.05) increased grain yield by 40% at harvest. However, AMF inoculation significantly (P< 0.05) decreased total N content in wheat shoots at the tillering stage, suggesting that AMF consortia may enhance plant tolerance to elevated [O3] by elevating root colonization rate rather than plant total N content at early growing stages.
KW - AMF consortia
KW - Crop yield
KW - Free-air ozone concentration enrichment (FACE)
KW - Nitrogen content
KW - Soil urease activity
UR - https://www.scopus.com/pages/publications/84883363727
M3 - Journal article
AN - SCOPUS:84883363727
SN - 1680-7073
VL - 15
SP - 1043
EP - 1052
JO - Journal of Agricultural Science and Technology
JF - Journal of Agricultural Science and Technology
IS - 5
ER -
