Zainudin, Nur Ain Izzati Mohd
(2007)
Diversity Of Fusarium Species Associated With Bakanae
Disease Of Rice In Malaysia And Indonesia.
PhD thesis, Perpustakaan Hamzah Sendut.
Abstract
Many diseases were reported to be associated with rice; one of the
diseases is bakanae that caused by Fusarium spp .. The main objective of these
studies was to characterize Fusarium spp. in Section Liseola isolated from
bakanae-infected rice in Malaysia and Indonesia by using several approaches
in order to determine the similarities and variabilities between the species.
Results during sampling bkanae disease were widespread in Peninsular
Malaysia and three provinces in Indonesia (East Java, Padang and Samarinda)
except in Yan, Kedah. The typical symptoms of bakanae disease were
abnormal elongation, yellowish leaves, produced a few tillers and wiry
adventitious roots. Some infected plants were stunted and those survived
appeared normal until maturity but produced empty and discoloured grains. A
total of 212 strains of Fusarium were isolated from bakanae-infected rice plants
and they were initially identified using morphological characteristics for species
delimitation. The highest number (127) of Fusarium strains were classified into
five species in Section Liseola Le. F. fujikuroi (most frequently, 37.3%), F.
verticiflioides, F. proliferatum, F. sacchari and F. subgJutinans.. Other species
were also isolated such as F. semitectum, F. oxysporum, F. solani, F. longipes,
F. chlamydosporum and F. equiseti. Pathogenicity test showed F. fujikuroi was
confirmed as the pathogen of bakanae disease on rice in Malaysia and
Indonesia with varying levels of virulence.
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