Ratio between virtual and visual lesion size as a measure to describe reduction in leaf photosynthesis of rice due to leaf blast.

The effect of Pyricularia oryzae, the causal organism of blast in rice, on net photosynthetic rate of rice leaves was measured in the field and in a greenhouse experiment. Leaf blast reduced photosynthesis not only through a reduction in green leaf area, but also through an effect on photosynthesis of the remaining green leaf tissue. A function was derived to relate the net photosynthetic rate of diseased leaf area (P x ) to the photosynthesis of comparable healthy leaf area (P o ) and disease severity (x): P x =P o (1-x) β (...)

[1]  J. Kaji,et al.  Biochemical Studies on the Blast Disease of Rice Plants , 1957 .

[2]  J. Azcón-Bieto.  Inhibition of photosynthesis by carbohydrates in wheat leaves. , 1983, Plant physiology.

[3]  K. Boote,et al.  Coupling Pests to Crop Growth Simulators to Predict Yield Reductions , 1983 .

[4]  J.,et al.  A decimal code for the growth stages of cereals , 2022 .

[5]  J. Bonman,et al.  New hosts of Pyricularia oryzae. , 1986 .

[6]  A. E. Ainsley,et al.  Genstat 5 Reference Manual , 1987 .

[7]  N. J. Chatterton.  Product Inhibition of Photosynthesis in Alfalfa Leaves as Related to Specific Leaf Weight , 1973 .

[8]  P. E. Waggoner,et al.  Defoliation, disease, and growth , 1987 .

[9]  M. Burrell,et al.  Carbohydrate metabolism of rice leaves infected by Piricularia oryzae , 1974 .

[10]  W. Louwerse,et al.  An assembly for routine measurements of photosynthesis, respiration and transpiration of intact plants under controlled conditions , 1969 .

[11]  G. Edwards,et al.  Photosynthesis and nonstructural carbohydrate concentration in leaf blades of Panicum virgatum as affected by night temperature , 1978 .

[12]  M. Okhovat,et al.  Estimating losses from rice blast disease. , 1990 .

[13]  Kenneth B. Johnson.  Defoliation, disease, and growth: a reply , 1987 .

[14]  W. Kaiser,et al.  Effects of water deficit on photosynthetic capacity , 1987 .

[15]  H. Berge,et al.  Simulation of Ecophysiological Processes of Growth in Several Annual Crops , 1989 .

[16]  H. Koller,et al.  Diurnal trends in net photosynthetic rate and carbohydrate levels of soybean leaves. , 1973, Plant physiology.