Effect of Leaf Age on Rice Yellow Mottle Virus Severity and Chlorophyll Content with Mechanical Inoculation and Vector Transmission Method

Joseph, A.; Olufolaji, D. B.; Nwilene, F. E.; Onasanya, A.; Omole, M.M.; Onasanya, R.O.; Séré, Y.

doi:10.3923/tasr.2011.1345.1351

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…From our study, at the plant level, high Eh and pH (and thus high Eh@pH7) are found in rather young plants, and in the youngest leaf. It is also remarkable that the rice yellow mottle virus (RYMV) inoculation is the most efficient on young rice plants and disease severity is the highest in the flag leaf as compared to older leaves [44,45].…”

Section: Virusesmentioning

confidence: 99%

Leaf Eh and pH: A Novel Indicator of Plant Stress. Spatial, Temporal and Genotypic Variability in Rice (Oryza sativa L.)

et al. 2018

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A wealth of knowledge has been published in the last decade on redox regulations in plants. However, these works remained largely at cellular and organelle levels. Simple indicators of oxidative stress at the plant level are still missing. We developed a method for direct measurement of leaf Eh and pH, which revealed spatial, temporal, and genotypic variations in rice. Eh (redox potential) and Eh@pH7 (redox potential corrected to pH 7) of the last fully expanded leaf decreased after sunrise. Leaf Eh was high in the youngest leaf and in the oldest leaves, and minimum for the last fully expanded leaf. Leaf pH decreased from youngest to oldest leaves. The same gradients in Eh-pH were measured for various varieties, hydric conditions, and cropping seasons. Rice varieties differed in Eh, pH, and/or Eh@pH7. Leaf Eh increases and leaf pH decreases with plant age. These patterns and dynamics in leaf Eh-pH are in accordance with the pattern and dynamics of disease infections. Leaf Eh-pH can bring new insight on redox processes at plant level and is proposed as a novel indicator of plant stress/health. It could be used by agronomists, breeders, and pathologists to accelerate the development of crop cultivation methods leading to agroecological crop protection.

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Section: Virusesmentioning

confidence: 99%

Leaf Eh and pH: A Novel Indicator of Plant Stress. Spatial, Temporal and Genotypic Variability in Rice (Oryza sativa L.)

et al. 2018

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“…Interestingly, in tomato, age-related resistance to Phytophthora infestans has been related to ethylene (ET) and SA (Shah et al 2015). Plant-leaf aging is related to acidification that matches with the higher susceptibility of young rice plant-leaves to viruses (thriving in alkaline conditions), as exemplified for Rice Yellow Mottle Virus (Joseph et al 2011). Likewise, young grapevine leaves present a high Grapevine Fanleaf Virus level during the whole vegetative period while mature leaves, tendrils and flower-berry clusters do so only at the beginning of the vegetative period (Krebelj et al 2015).…”

Section: Balanced Apoplastmentioning

confidence: 97%

Soil and plant health in relation to dynamic sustainment of Eh and pH homeostasis: A review

et al. 2021

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“…The major effect genomic region for AfRGM resistance was in the [ITA306 × TOS14519] population, which was at 111cM on chromosome 4 (qAfrGM4), had a LOD score of 60 and accounted for 34.1% of the total phenotypic variance [11]. Likewise, Rice Yellow Mottle Virus (RYMV, a Sobemo virus) is another major constraint to rice production in the continent [12] because it causes 17 to 100% grain yield loss according to both the infection date and time, and the cultivar host [13,14]). RYMV is highly infectious to rice, especially to Asian indica cultivars in lowland and irrigated agro-ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Putting Plant Genetic Diversity and Variability at Work for Breeding: Hybrid Rice Suitability in West Africa

El-Namaky¹,

Coulibaly

Alhassan

et al. 2017

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Rice is a staple food in West Africa, where its demand keeps increasing due to population growth. Hence, there is an urgent need to identify high yielding rice cultivars that fulfill this demand locally. Rice hybrids are already known to significantly increase productivity. This study evaluated the potential of Asian hybrids with good adaptability to irrigated and rainfed lowland rice areas in Mali, Nigeria, and Senegal. There were 169 hybrids from China included in trials at target sites during 2009 and 2010. The genotype × environment interaction was highly significant (p < 0.0001) for grain yield indicating that the hybrids' and their respective cultivar checks' performance differed across locations. Two hybrids had the highest grain yield during 2010 in Mali, while in Nigeria, four hybrids in 2009 and one hybrid in 2010 had higher grain yield and matured earlier than the best local cultivar. The milling recovery, grain shape and cooking features of most hybrids had the quality preferred by West African consumers. Most of the hybrids were, however, susceptible to African rice gall midge (AfRGM) and Rice Yellow Mottle Virus (RMYV) isolate Ng40. About 60% of these hybrids were resistant to blast. Hybrids need to incorporate host plant resistant for AfRGM and RYMV to be grown in West Africa.

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Effect of Leaf Age on Rice Yellow Mottle Virus Severity and Chlorophyll Content with Mechanical Inoculation and Vector Transmission Method

Cited by 5 publications

References 12 publications

Leaf Eh and pH: A Novel Indicator of Plant Stress. Spatial, Temporal and Genotypic Variability in Rice (Oryza sativa L.)

Leaf Eh and pH: A Novel Indicator of Plant Stress. Spatial, Temporal and Genotypic Variability in Rice (Oryza sativa L.)

Soil and plant health in relation to dynamic sustainment of Eh and pH homeostasis: A review

Putting Plant Genetic Diversity and Variability at Work for Breeding: Hybrid Rice Suitability in West Africa

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