Reference "Effect on leaf photosynthetic rate by leaf blast for rice cultivars with different types and levels of resistance"

Reference ID

248

Title

Effect on leaf photosynthetic rate by leaf blast for rice cultivars with different types and levels of resistance

Source

Euphytica, 1993, vol. 66, pp. 81-87

Authors (2)

Bastiaans-L

Roumen-E-C

Abstract

The effect of an inoculation with Pyricularia oryzae (isolate P06-6) on net leaf
photosynthetic rate of rice (Oryza sativa) was studied with four cultivars.
Measurements were taken on the sixth leaf of the main culm of plants in the
early tillering stage. On cultivars CO39, IR50 and IR64 a susceptible infection
type developed, but a clear difference in relative infection efficiency of the
cultivars was observed. The highest number of lesions developed on leaves of
CO39, whereas the lowest number was found on leaves of IR64. For all three
cultivars the effect of a single lesion on the reduction in net leaf
photosynthetic rate was found to be equal to a reduction in leaf area of three
times the area occupied by the visible lesion. On IR68, a cultivar with complete
resistance, brown specks of pinpoint size appeared without any effect on net
leaf photosynthetic rate. [References: 17]