Genetic Improvement of Iron Toxicity Tolerance in Rice-Progress, Challenges and Prospects in West Africa

Sikirou, Mouritala; Saito, Kazuki; Achigan‐Dako, Enoch G.; Dramé, Khady Nani; Ahanchédé, Adam; Venuprasad, R.

doi:10.1626/pps.18.423

Cited by 54 publications

(52 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most breeding programs rely on screening in Fe-toxic 'hotspots. ' However, most hot spots are in rainfed ecologies where screening is limited to one season per year, and year-to-year variations in rainfall cause significant G × E. These factors limit rice selection efficiency (Sikirou et al, 2015). Further, there are no valid managed-stress screening protocols (e.g.…”

mentioning

confidence: 99%

“…Further, there are no valid managed-stress screening protocols (e.g. hydroponic method, sand based, or soils) which are efficient and can predict rice performance in the target environments according to a detailed literature review by Sikirou et al (2015). Some researchers have used pot or cement tanks filled with soils for evaluating Fe toxicity tolerance in rice (Abifarin, 1989;Onaga, Edema, & Asea, 2012;Sikirou, 2009).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Soil-based screening for iron toxicity tolerance in rice using pots

Sikirou

Saito

Dramé³

et al. 2016

Plant Production Science

Self Cite

View full text Add to dashboard Cite

mentioning

confidence: 99%

mentioning

confidence: 99%

Soil-based screening for iron toxicity tolerance in rice using pots

Sikirou

Saito

Dramé³

et al. 2016

Plant Production Science

Self Cite

View full text Add to dashboard Cite

“…Iron (Fe) toxicity is a complex nutrient disorder that greatly limits lowland rice production (Becker and Asch 2005;Sikirou et al 2015;Onaga et al 2016;Onyango et al 2018), particularly in Africa where it was ranked as the second most important abiotic stress after drought in rice production areas (van Oort 2018). In response to the diversity of conditions under which Fe toxicity occurs (Becker and Asch 2005) and its seasonal and spatial variability (both in severity and duration), rice plants have developed a wide range of reactions to circumvent the harmful effects of Fe toxicity.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic understanding of iron toxicity tolerance in contrasting rice varieties from Africa: 2. Root oxidation ability and oxidative stress control

Onyango

Entila

Egdane

et al. 2020

Functional Plant Biol.

View full text Add to dashboard Cite

To enhance breeding efficiency for iron (Fe) toxicity tolerance and boost lowland rice production in sub-Saharan Africa, we have characterised the morphological, physiological and biochemical responses of contrasting rice varieties to excess iron. Here, we report the capacity of four varieties (CK801 and Suakoko8 (tolerant), Supa and IR64 (sensitive)) to oxidise iron in the rhizosphere and control iron-induced oxidative stress. The experiments were conducted in hydroponic conditions using modified Magnavaca nutrient solution and 300 ppm of ferrous iron (Fe2+) supplied in the form of FeSO4. Severe oxidative stress was observed in sensitive varieties as revealed by their high levels of lipid peroxidation. Histochemical and biochemical analyses showed that tolerant varieties exhibited a better development of the aerenchyma and greater oxygen release than the sensitive varieties in response to excess Fe. Both suberin and lignin deposits were observed in the root, stem and leaf tissues but with varying intensities depending on the variety. Under iron toxic conditions, tolerant varieties displayed increased superoxide dismutase (SOD), glutathione reductase (GR), peroxidase (POX) and ascorbate peroxidase (APX) activities in both the roots and shoots, whereas sensitive varieties showed increased APX and catalase (CAT) activities in the roots. This study had revealed also that Suakoko8 mainly uses root oxidation to exclude Fe2+ from its rhizosphere, and CK801 possesses a strong reactive oxygen species scavenging system, in addition to root oxidation ability. Key traits associated with these tolerance mechanisms such as a well-developed aerenchyma, radial oxygen loss restricted to the root cap as well as strong activation of antioxidative enzymes (SOD, GR, POX and APX) could be useful selection criteria in rice varietal improvement programs for enhanced Fe toxicity tolerance.

show abstract

“…Toutefois, l'utilisation de variétés tolérantes est sans doute la méthode la plus appropriée à la situation socioéconomique de la plupart des producteurs. Ainsi plusieurs travaux de sélection et de diffusion de variétés tolérantes à la toxicité ferreuse sont menés par des centres de recherches en Afrique de l'Ouest (Sikirou et al, 2015 (04) Prélèvement de sol et dosage du fer avant la mise en place de l'essai : Dix (10) prélèvements de sol ont été effectués de manière aléatoire par bloc et soigneusement homogénéisés pour constituer un échantillon afin de minimiser les effets dus à l'hétérogénéité de la toxicité. Au total 3 échantillons de sol issus des 3 blocs (B1 ; B2 ; B3) ont été constitués puis dosés pour la détermination du Fer total.…”

Section: Introductionunclassified

“…La variation de la sévérité des variétés vis-à-vis de la toxicité ferreuse est certainement due à l'existence d'une différence génotypique entre ces dernières. En effet, plusieurs travaux ont montré que les variétés de riz présentent différents comportements vis-à-vis de la toxicité ferreuse (Chérif et al, 2009 ;Onaga et al, 2013 ;Sikirou et al, 2015). Elles peuvent être résistantes, moyennement résistantes ou tolérantes et sensibles.…”

Section: Introductionunclassified

Évaluation de deux variétés de riz (CK73 et CK90) à la Toxicité Ferreuse et à quelques contraintes biotiques à Yamoussoukro (Côte d’Ivoire)

Gnago¹,

Kouadio²,

Tia³

et al. 2017

J. App. Bioscience.

View full text Add to dashboard Cite

Evaluation of two rice varieties (CK73 and CK90) on iron toxicity and some biotic stress in Yamoussoukro (Ivory Coast) ABSTRACT Objective: The iron toxicity is a nutrient disorder associated with high iron concentrations may be lead to a significant impact on rice yield. The objective of this study is to evaluate the behaviors of two rice varieties CK73 and CK90 on iron toxicity and some biotic stress in irrigated lowlands on the perimeter of Petit Bouaké at Yamoussoukro in Ivory Coast. Methodology and results: A randomized complete block design with three replications was implemented in order to compare CK73 and CK90 introduced varieties with WITA9 as control which was already known. Iron toxicity, blast disease and leaf blight scores were recorded. The mean of iron toxicity visual score of tested varieties are 3.5, 3.9, 4.2 for CK90, WITA9 and CK73 respectively. Average yield of paddy for tested varieties are 2.7 T/ha, 2.2 T/ha, 4.5 T/ha for CK73, CK90 and WITA 9 respectively. The tolerance of varieties to blast disease was good with mean scores of 1.6; 1; 1 for CK73, CK90 and WITA9 respectively. Furthermore, the mean of leaf blight visual score of varieties are 5.4; 3.2; 2.6 for CK 73, CK90 and WITA9 respectively. Conclusion and applications:The evaluation of two rice varieties (CK73 and CK90) in order to disseminate in Ivory Coast was able to confirm their tolerance on iron toxicity in the site of Yamoussoukro. Furthermore, WITA9 which was already disseminated showing a moderate level of tolerance. Paddy yields of the two new varieties are acceptable against the specification sheets (3-4 T/ha).

show abstract

Genetic Improvement of Iron Toxicity Tolerance in Rice-Progress, Challenges and Prospects in West Africa

Cited by 54 publications

References 41 publications

Soil-based screening for iron toxicity tolerance in rice using pots

Soil-based screening for iron toxicity tolerance in rice using pots

Mechanistic understanding of iron toxicity tolerance in contrasting rice varieties from Africa: 2. Root oxidation ability and oxidative stress control

Évaluation de deux variétés de riz (CK73 et CK90) à la Toxicité Ferreuse et à quelques contraintes biotiques à Yamoussoukro (Côte d’Ivoire)

Contact Info

Product

Resources

About