Metabolic responses to potassium availability and waterlogging reshape respiration and carbon use efficiency in oil palm

Cui Jing, Davanture Marlène, Zivy Michel, Lamade Emmanuelle, Tcherkez Guillaume. 2019. Metabolic responses to potassium availability and waterlogging reshape respiration and carbon use efficiency in oil palm. New Phytologist, 223 (1) : 310-322.

Quartile : Outlier, Sujet : PLANT SCIENCES

Résumé : Oil palm is by far the major oil‐producing crop on the global scale, with c. 62 Mt oil produced each year. This species is a strong potassium (K)‐demanding species cultivated in regions where soil K availability is generally low and waterlogging due to tropical heavy rains can limit further nutrient absorption. However, the metabolic effects of K and waterlogging have never been assessed precisely. Here, we examined the metabolic response of oil palm saplings in the glasshouse under controlled conditions (nutrient composition with low or high K availability, with or without waterlogging), using gas exchange, metabolomics and proteomics analyses. Our results showed that both low K and waterlogging have a detrimental effect on photosynthesis but stimulate leaf respiration, with differential accumulation of typical metabolic intermediates and enzymes of Krebs cycle and alternative catabolic pathways. In addition, we found a strong relationship between metabolic composition, the rate of leaf dark respiration, and cumulated respiratory loss. Advert environmental conditions (here, low K and waterlogging) therefore have an enormous effect on respiration in oil palm. Leaf metabolome and proteome appear to be good predictors of carbon balance, and open avenues for cultivation biomonitoring using functional genomics technologies.

Mots-clés Agrovoc : Elaeis guineensis, potassium, Engorgement du sol, respiration du sol, photosynthèse, biomonitoring, cycle du carbone

Mots-clés géographiques Agrovoc : Australie, Thaïlande

Mots-clés complémentaires : Protéomique

Mots-clés libres : Metabolomics, Oil palm, Potassium, Proteomics, Respiration, Waterlogging

Classification Agris : F61 - Physiologie végétale - Nutrition
P10 - Ressources en eau et leur gestion

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Cui Jing, ANU (AUS)
• Davanture Marlène, Université Paris-Sud (FRA)
• Zivy Michel, INRA (FRA)
• Lamade Emmanuelle, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA) ORCID: 0000-0002-4909-0997
• Tcherkez Guillaume, ANU (AUS) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592025/)

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