Indian Society of Genetics & Plant Breeding


Expression analysis of defence related genes and histopathological changes in direct seeded rice genotypes (Oryza sativa L.) against root-knot nematode (Meloidogyne graminicola)

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The root-knot nematodes, Meloidogyne spp. are one of the
most important diseases causing organisms in direct
seeded rice. In order to gain insight of differential response
of susceptible and resistant rice cultivars upon nematode
infection, expression of OsEDS1, OsPAD4 and OsWRKY
genes involved in plant innate immunity was investigated.
The expression analysis showed that EDS1- and PAD4-
mediated SA-upstream signaling triggered the induced
defense at an the early stage of infection i.e., 2dpi and 6dpi
in the resistant rice variety NDR-97, while it was negatively
regulated in the susceptible genotype PB-1121. The
histopathological studies of root galls of susceptible and
resistant plants showed significant differences in the
development of females, giant cells and egg production.
The fecundity of the nematode was suppressed in the
resistant cultivars.

Keywords: Root-knot nematode, resistance, susceptibility, histopathology, rice


Year: 2018
Volume: 78
Issue: 1
Article DOI: 10.5958/0975-6906.2018.00019.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Pankaj info_circle
Anil Sirohi info_circle
Ashok Kumar Singh info_circle
Ranjith K. Ellur info_circle

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