TY  - BOOK
AU  - Garcia D
AU  - DAuzac J
AU  - Macheix J J
AU  - Sanier C
TI  - Accumulation of scopoletin in Hevea brasiliensis infected by Microcyclus ulei (P. Henn) V. ARX and evaluation of its fungitoxicity for three leaf pathogens of rubber tree
PY  - 1995///
PB  - Physiological and Molecular Plant Pathology
KW  - Hevea brasiliensis
KW  - Microcyclus ulei
KW  - Scopoletin accumulation
N1  - Source Year: 1996
N2  - After inoculation with M. ulei, Hevea leaflets produced a coumarin, scopoletin, in the infected zones. The degree of resistance of 4 clones was related to the rapidity and intensity of scopoletin accumulation. Thus, 24 h after inoculation, the clones with total resistance and those with a high level of partial resistance displayed an early accumulation of scopoletin that intensified and lasted longer than 48 h in the fully resistant clones. The level of partial resistance was positively correlated with scopoletin concn 48 h after inoculation. The fungitoxic effect of scopoletin was verified in vitro on M. ulei where 2 mM cocn were sufficient to strongly inhibit germ tube elongation and conidium germination. In situ, 24 h after inoculation, conidium germination and number of infection sites were lower in the most resistant clones. The fungitoxic effect of scopoletin was tested on 2 other leaf pathogens of H. brasiliensis, Colletotrichum gloeosporioides [Glomerella cingulata] and Corynespora cassiicola. Cocn double or more than those tested on M. ulei were required for total inhibition of germination and germ tube elongation
UR  - RPP
ER  -