@article{fdi:010061721, title = {{H}istopathology of the rice root-knot nematode, {M}eloidogyne graminicola, on {O}ryza sativa and {O}. glaberrima}, author = {{C}abasan, {M}. {T}. {N}. and {K}umar, {A}. and {B}ellafiore, {S}t{\'e}phane and {D}e {W}aele, {D}.}, editor = {}, language = {{ENG}}, abstract = {{T}he root-knot nematode, {M}eloidogyne graminicola, can cause substantial rice yield losses. {U}nderstanding the mechanisms of resistance to this nematode species in known resistant rice genotypes may help to improve rice genotypes, aiming at developing and implementing environment-friendly and cost-effective nematode management strategies. {U}sing susceptible and resistant rice genotypes, a comparative analysis of histological response mechanisms was made during two phases of the nematode colonisation: i) root penetration; and ii) subsequent establishment and development by {M}. graminicola second-stage juveniles ({J}2). {T}wo types of defence response mechanisms could be distinguished in the resistant rice genotypes. {T}he early defence response consisted of a hypersensitive response ({HR})-like reaction in the early stage of infection characterised by necrosis of cells directly affected by nematode feeding. {T}his {HR}-like reaction was observed only in the {M}. graminicola-resistant {O}ryza glaberrima genotypes and not in the {M}. graminicola-susceptible {O}. sativa genotypes. {T}he late defence response took place after the induction of giant cells by the {J}2. {G}iant cells usually collapsed and degenerated before {J}2 developed into adults. {S}tructural features of the roots of the susceptible {O}. sativa showed greater root and stele diam. and cortex thickness than the resistant {O}. glaberrima genotypes. {D}esired features of plants with resistance to {M}. graminicola elucidated in this study can be used for selection of plants for breeding programmes.}, keywords = {giant cells ; hypersensitive response-like reaction ; penetration ; resistance ; root morphology ; susceptibility ; {PHILIPPINES}}, booktitle = {}, journal = {{N}ematology}, volume = {16}, numero = {1}, pages = {73--81}, ISSN = {1388-5545}, year = {2014}, DOI = {10.1163/15685411-00002746}, URL = {https://www.documentation.ird.fr/hor/fdi:010061721}, }