Internal Cs+ inhibits root elongation in rice

Mohamed Sonia, Sentenac Hervé, Guiderdoni Emmanuel, Very Anne-Aliénor, Nieves-Cordones Manuel. 2018. Internal Cs+ inhibits root elongation in rice. Plant Signaling and Behavior, 13 (2):e1428516, 4 p.

https://doi.org/10.1080/15592324.2018.1428516

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Quartile : Q2, Sujet : PLANT SCIENCES / Quartile : Q4, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : The root system anchors the plant to the soil and contributes to plant autotrophy by taking up nutrients and water. In relation with this nutritional function, root development is largely impacted by availability of nutrients and water. Due to human activity, plants, in particular crops, can also be exposed to pollutants which can be absorbed and incorporated into the food chain. Cesium in soils is present at non-toxic concentrations for the plant (micromolar or less), even in soils highly polluted with radioactive cesium due to nuclear accidents. Here, we report on the morphological response of rice roots to Cs+ at micromolar concentrations. It is shown that Cs+ reduces root elongation without affecting root dry weight. Noteworthy, inactivation of the Cs+-permeable K+ transporter OsHAK1 prevents such effect of Cs+, suggesting that internal Cs+ triggers the modification of the root system.

Mots-clés Agrovoc : Oryza, césium, système racinaire, pollution atmosphérique, pollution de l'eau, pollution du sol, radioactivité, chaîne alimentaire

Mots-clés géographiques Agrovoc : Japon

Mots-clés libres : Cesium, OsHAK1, Root elongation, Rice, CRISPR-Cas

Classification Agris : F62 - Physiologie végétale - Croissance et développement
P02 - Pollution
F50 - Anatomie et morphologie des plantes

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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