Journal
FUNGAL ECOLOGY
Volume 6, Issue 1, Pages 37-43Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2012.09.002
Keywords
Antioxidant enzymes; Citrus; Mycorrhizas; Root morphology; Waterlogging
Funding
- National Natural Science Foundation of China [31101513]
- Key Project of Ministry of Education of China [211107]
- Science-Technology Research Project of Hubei Provincial Department of Education [Q20111301]
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Citrus plants are often exposed to heavy rain and subsequent periods of soil waterlogging which severely restrict tree growth. We assessed the effect of one arbuscular mycorrhizal fungus species (Diversispora spurca) on growth, root system architecture (RSA), and antioxidant enzyme activities of young citrus (Citrus junos) seedlings. Waterlogging for 37 d significantly restricted mycorrhizal colonization but increased the number of entry points and vesicles. Compared with non-mycorrhizal controls, mycorrhizal seedlings had significantly greater plant height, fresh mass, total root and taproot lengths, projected and surface root areas, root volume, and numbers of 1st, 2nd and 3rd order lateral roots regardless of waterlogging treatment. D. spurca significantly increased root catalase (CAT) activity in non-stressed seedlings and increased root soluble protein concentration and leaf CAT activity in waterlogged seedlings, thereby inducing lower oxidative damage. These results suggest that D. spurca ameliorates effects of waterlogging on growth, RSA and antioxidant enzyme activities. (c) 2012 Elsevier Ltd and The British Mycological Society. All rights reserved.
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