Pazdiora, P.C., de Avila, L.A.,
Deuner, S. and Dallagnol, L.J.
2020
Biochemical defenses of rice
against Bipolaris oryzae increase
with high atmospheric concentration
of CO2.
Physiological and Molecular
Plant Pathology 110: 101484.
Full Summary Here:
http://www.co2science.org/articles/V23/sep/a4.php
My Short Summary Follows:
Rice brown spot disease, caused by the fungus Bipolaris oryzae, "occurs in all rice-growing regions", and is one of the main diseases of the crop, causing grain yield reductions of "up to 90%." Symptoms of brown spot were less severe for both cultivars at elevated (700 ppm) CO2 concentrations, versus rice grown at current CO2 levels (400 ppm).
Dorneles et al. wrote: "the increase in the atmospheric concentration of CO2 provided greater reinforcement of the cell wall defense by increasing the concentration of both TSP and DLTGA, at the beginning of the infection process." TSPs are "compounds considered to be antifungal and are involved in cell wall reinforcement when accumulated quickly at sites of infection, which is of paramount importance to restrict infection by the pathogen."
