subjecting inoculated leaves of intact plants to a controlled atmospheric-environmental system with an atmospheric pressure of 233 millibars and o ( 2 ) and co ( 2 ) partial pressures adjusted to approximately that of normal ambient pressure during infection and disease development prevented most midvein chlorosis and complete chlorosis , but did not prevent necrotic lesion or chlorotic halo development .
C0009450
infection
C0012634
disease