Seed - borne fungal endophytes constrain reproductive success of host plants under ozone pollution

Tropospheric ozone is among the global change factors that pose a threat to plants and microorganisms. Symbiotic microorganisms can assist plants to cope with stress, but their role in the tolerance of plants to ozone is poorly understood. Here, we subjected endophyte-symbiotic and non-symbiotic pl...

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Otros Autores: Ueno, Andrea Celeste, Gundel, Pedro Emilio, Ghersa, Claudio Marco, Agathokleous, Evgenios, Martínez Ghersa, María Alejandra
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2021ueno1.pdf
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245 1 |a Seed - borne fungal endophytes constrain reproductive success of host plants under ozone pollution 
520 |a Tropospheric ozone is among the global change factors that pose a threat to plants and microorganisms. Symbiotic microorganisms can assist plants to cope with stress, but their role in the tolerance of plants to ozone is poorly understood. Here, we subjected endophyte-symbiotic and non-symbiotic plants of Lolium multiflorum, an annual species widely distributed in temperate grasslands, to high and low (i.e., charcoal-filtered air) ozone levels at vegetative and reproductive phases. Exposure to high ozone reduced leaf photochemical efficiency and greenness in both symbiotic and non-symbiotic plants. However, ozone-induced oxidative damage at biochemical level (i.e., lipid peroxidation) was mostly detected in symbiotic plants. Ozone exposure at the vegetative phase did not affect the reproductive investment in seeds, indicating full recovery from stress. Ozone exposure at the reproductive phase reduced biomass and seed production only in symbiotic plants indicating a symbiontassociated cost. At low ozone, endophyte-symbiotic plants showed a steeper slope in the relationship between seed number and seed weight (i.e., a number-weight trade-off) compared to non-symbiotic plants. However, when plants were treated at the reproductive phase, ozone increased the imbalance between seed number and seed weight in both endophyte-symbiotic and non-symbiotic plants. Plants with endophytes at the reproductive stage produced fewer seeds, which were not compensated by increased seed weight. Thus, fungal mycelium growing within ovaries or ozone-induced antioxidant systems may result in costs that finally depress the fitness of plants. Despite ozone pollution could destabilize plant-endophyte mutualisms and render them dysfunctional, other endophyte-mediated benefits (e.g., resistance to herbivory, tolerance to drought) could over-compensate these losses and explain the high incidence of the symbiosis in nature. 
653 |a AIR POLLUTION 
653 |a ENVIRONMENTAL STRESS 
653 |a LOLIUM MULTIFLORUM 
653 |a EPICHLÖE OCCULTANS 
653 |a PLANT MICROBES INTERACTION 
653 |a SYMBIOSIS 
700 1 |a Ueno, Andrea Celeste  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 34719 
700 1 |a Gundel, Pedro Emilio  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u Universidad de Talca. Instituto Ciencias Biológicas. Campus Lircay. Talca, Chile.  |9 28667 
700 1 |a Ghersa, Claudio Marco  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 7549 
700 1 |a Agathokleous, Evgenios  |u Nanjing University of Information Science and Technology (NUIST). Department of Ecology. School of Applied Meteorology. Nanjing, China.  |9 74066 
700 1 |a Martínez Ghersa, María Alejandra  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 7113 
773 |t Environmental Research  |g Vol.202 (2021), e111773, 12 p., grafs., tbls. 
856 |f 2021ueno1  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2021ueno1.pdf  |x ARTI202210 
856 |u https://www.sciencedirect.com/journal/environmental-research  |z LINK AL EDITOR 
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