Journal
FUNGAL ECOLOGY
Volume 22, Issue -, Pages 26-34Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2016.04.002
Keywords
Achnatherum inebrians; Blumeria graminis; Epichloe endophytes; Soil water condition; Photosynthetic parameters
Funding
- National Basic Research Program of China [2014CB138702]
- National Nature Science Foundation of China [31402132]
- Fundamental Research Funds for the Central Universities [lzujbky-2014-75]
- Program for New Century Excellent Talents in the University [NCET-08-0256]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13019]
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The interaction between an Epichloe endophyte, Blumeria graminis and Achnatherum inebrians, was studied at four soil water contents. Lesion length and disease index were recorded dynamically, and the chlorophyll content, photosynthetic parameters and final dry matter accumulation were measured after a 4-week period of disease. Infection by B. graminis significantly (P < 0.05) decreased the chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration and dry matter at some soil water contents. Presence of the endophyte lowered the disease index while significantly (P < 0.05) increasing the chlorophyll content and net photosynthetic rate. The endophyte also positively affected the intercellular carbon dioxide concentration. In addition, it increased the dry matter accumulation per host plant under pathogen stress. The study demonstrated that while powdery mildew depresses the photosynthetic parameters of A. inebrians, the presence of the Epichloe endophyte can reduce the damage caused by the pathogen. (C) 2016 Elsevier Ltd and British Mycological Society. All rights reserved.
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