Details
| Original language | English |
|---|---|
| Pages (from-to) | 115-127 |
| Number of pages | 13 |
| Journal | European Journal of Plant Pathology |
| Volume | 147 |
| Issue number | 1 |
| Publication status | Published - Jan 2017 |
Abstract
Plant response to one type of stress can be affected by simultaneous exposure to a second stress, for example when abiotic and biotic stresses occur together. Ten rice genotypes comprising those with bacterial blight (BB) resistance (R) genes, drought quantitative trait loci (QTLs) plus a BB R gene, and BB susceptible genotypes, were subjected to mild and moderate drought stress and plants were inoculated with two Xoo strains (PXO99 and PXO145) to simulate the challenges rice crops face under simultaneous stress of drought and BB. Plant height and dry shoot biomass were significantly reduced by drought stress treatments. The BB disease lesion lengths varied according to rice genotypes and PXO99 Xoo multiplication and spread in planta was higher compared to that of PXO145, which generally decreased under mild drought stress. Rice genotype IRBB7 (Xa7) showed less Xoo spread and a reduced Xoo multiplication under drought stress compared to the well-watered control with PXO145. In contrast, in genotypes with a different BB R gene and/or drought QTLs [IRBB4 (Xa4), IR87705–6-9-B (Xa4 + qDYT2.2), IR87707–445-B-B-B (Xa4 + qDYT2.2 + qDYT4.1) and IR87707–446-B-B-B (Xa4 + qDYT2.2 + qDYT4.1)], Xoo multiplication and spread in planta was higher with drought stress. This study has shown that drought stress affected rice response to the BB pathogen and the response varied according to the rice genotype. It is concluded that evaluating rice varieties under combined abiotic and biotic stresses will be the best strategy to determine biotic stress resistance durability under climate change.
Keywords
- Bacterial blight, Drought stress, Rice, Xa4, Xa7, Xanthomonas oryzae pv. oryzae
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Plant Science
- Agricultural and Biological Sciences(all)
- Horticulture
Sustainable Development Goals
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In: European Journal of Plant Pathology, Vol. 147, No. 1, 01.2017, p. 115-127.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Rice response to simultaneous bacterial blight and drought stress during compatible and incompatible interactions
AU - Dossa, Gerbert Sylvestre
AU - Torres, Rolando
AU - Henry, Amelia
AU - Oliva, Ricardo
AU - Maiss, Edgar
AU - Cruz, Casiana Vera
AU - Wydra, Kerstin
N1 - Funding information: The authors are grateful to Epifania Garcia, Jessica Candace Soriano, Allan Los Añes and Mignon Natividad for their technical assistance. This study was funded by the Federal Ministry for Economic Cooperation and Development (BMZ), Germany, in the framework of Mitigating the Impact of Climate change on Rice Diseases in East Africa (MICCORDEA) and Global Rice Science Partnership (GRiSP).
PY - 2017/1
Y1 - 2017/1
N2 - Plant response to one type of stress can be affected by simultaneous exposure to a second stress, for example when abiotic and biotic stresses occur together. Ten rice genotypes comprising those with bacterial blight (BB) resistance (R) genes, drought quantitative trait loci (QTLs) plus a BB R gene, and BB susceptible genotypes, were subjected to mild and moderate drought stress and plants were inoculated with two Xoo strains (PXO99 and PXO145) to simulate the challenges rice crops face under simultaneous stress of drought and BB. Plant height and dry shoot biomass were significantly reduced by drought stress treatments. The BB disease lesion lengths varied according to rice genotypes and PXO99 Xoo multiplication and spread in planta was higher compared to that of PXO145, which generally decreased under mild drought stress. Rice genotype IRBB7 (Xa7) showed less Xoo spread and a reduced Xoo multiplication under drought stress compared to the well-watered control with PXO145. In contrast, in genotypes with a different BB R gene and/or drought QTLs [IRBB4 (Xa4), IR87705–6-9-B (Xa4 + qDYT2.2), IR87707–445-B-B-B (Xa4 + qDYT2.2 + qDYT4.1) and IR87707–446-B-B-B (Xa4 + qDYT2.2 + qDYT4.1)], Xoo multiplication and spread in planta was higher with drought stress. This study has shown that drought stress affected rice response to the BB pathogen and the response varied according to the rice genotype. It is concluded that evaluating rice varieties under combined abiotic and biotic stresses will be the best strategy to determine biotic stress resistance durability under climate change.
AB - Plant response to one type of stress can be affected by simultaneous exposure to a second stress, for example when abiotic and biotic stresses occur together. Ten rice genotypes comprising those with bacterial blight (BB) resistance (R) genes, drought quantitative trait loci (QTLs) plus a BB R gene, and BB susceptible genotypes, were subjected to mild and moderate drought stress and plants were inoculated with two Xoo strains (PXO99 and PXO145) to simulate the challenges rice crops face under simultaneous stress of drought and BB. Plant height and dry shoot biomass were significantly reduced by drought stress treatments. The BB disease lesion lengths varied according to rice genotypes and PXO99 Xoo multiplication and spread in planta was higher compared to that of PXO145, which generally decreased under mild drought stress. Rice genotype IRBB7 (Xa7) showed less Xoo spread and a reduced Xoo multiplication under drought stress compared to the well-watered control with PXO145. In contrast, in genotypes with a different BB R gene and/or drought QTLs [IRBB4 (Xa4), IR87705–6-9-B (Xa4 + qDYT2.2), IR87707–445-B-B-B (Xa4 + qDYT2.2 + qDYT4.1) and IR87707–446-B-B-B (Xa4 + qDYT2.2 + qDYT4.1)], Xoo multiplication and spread in planta was higher with drought stress. This study has shown that drought stress affected rice response to the BB pathogen and the response varied according to the rice genotype. It is concluded that evaluating rice varieties under combined abiotic and biotic stresses will be the best strategy to determine biotic stress resistance durability under climate change.
KW - Bacterial blight
KW - Drought stress
KW - Rice
KW - Xa4
KW - Xa7
KW - Xanthomonas oryzae pv. oryzae
UR - http://www.scopus.com/inward/record.url?scp=84976438462&partnerID=8YFLogxK
U2 - 10.1007/s10658-016-0985-8
DO - 10.1007/s10658-016-0985-8
M3 - Article
AN - SCOPUS:84976438462
VL - 147
SP - 115
EP - 127
JO - European Journal of Plant Pathology
JF - European Journal of Plant Pathology
SN - 0929-1873
IS - 1
ER -