期刊
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 102, 期 5, 页码 1927-1938出版社
WILEY
DOI: 10.1002/jsfa.11530
关键词
antioxidant activity; arbuscular mycorrhizal fungi; phenolic compounds; photosynthesis; water stress; wheat crop
资金
- Agencia Nacional de Investigacion y Desarrollo (ANID, Chile) [ANID/FONDECYT/1210964, ANID/FONDECYT/1190585, ANID/FONDAP/15130015]
The study showed that wheat plants inoculated with AMF exhibited higher antioxidant activity and phenolic content, indicating their ability to cope with water stress, which is important in regions where global climate change is leading to reduced rainfall.
BACKGROUND A decrease in rainfall is one of the main constraints on wheat production, although the association of wheat with arbuscular mycorrhizal fungi (AMF) may be an alternative for crop production under drought conditions. In the present study, we used three wheat cultivars (Purple, Ilustre and Maxi Baer) inoculated with two AMF strains, one obtained from the hyperarid Atacama Desert (northern Chile; Fm) and the other obtained from southern Chile (Cc). Plants were maintained under two irrigation conditions (normal irrigation and drought) and the physiological behaviour and enzymatic and nonenzymatic antioxidant activities in the shoots were determined. In addition, the phenolic compounds were identified by high-performance liquid chromatography-dioide array detection-electrospray ionization-tandem mass spectrometry and quantified. RESULTS AMF colonization produced higher levels of efficiency of photosystem II and photosynthetic pigments. High values of catalase in Purple-Cc, ascorbate peroxidase in Purple-Cc, glutathione reductase in Maxi-Cc and superoxide dismutase in Purple-Cc, all under stress, were registered. Of the inoculated cultivars, Purple-Cc showed the highest flavonoid levels, whereas hydroxycinnamic acids were higher in Maxi-Fm without drought, with apigenin and luteolin being the most abundant. High levels of phenols were present in the Ilustre-Fm plants without drought. Under normal irrigation, high levels of antioxidant activity were registered in the AMF treatments, whereas, under stress conditions, in general, high values were observed under the Fm inoculation. CONCLUSION Our results showed that the greatest antioxidant activity and phenolic content occurred in wheat plants inoculated with AMF, indicating their influence on coping with water stress, which is of importance in vast areas where global climate change is resulting in diminished rainfall. (c) 2021 Society of Chemical Industry.
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