Single and Combined Fe and S Deficiency Differentially Modulate Root Exudate Composition in Tomato: A Double Strategy for Fe Acquisition?

Luigi Lucini, Stefania Astolfi, Youry Pii, Tanja Mimmo, Eleonora Coppa, Simona Violino, Silvia Celletti, Stefano Cesco

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4 Citazioni (Scopus)

Abstract

Fe chlorosis is considered as one of the major constraints on crop growth and yield worldwide, being particularly worse when associated with S shortage, due to the tight link between Fe and S. Plant adaptation to inadequate nutrient availabilities often relies on the release of root exudates that enhance nutrients, mobilization from soil colloids and favour their uptake by roots. This work aims at characterizing the exudomic profile of hydroponically grown tomato plants subjected to either single or combined Fe and S deficiency, as well as at shedding light on the regulation mechanisms underlying Fe and S acquisition processes by plants. Root exudates have been analysed by untargeted metabolomics, through liquid chromatography–mass spectrometry as well as gas chromatography–mass spectrometry following derivatization. More than 200 metabolites could be putatively annotated. Venn diagrams show that 23%, 10% and 21% of dierential metabolites are distinctively modulated by single Fe deficiency, single S deficiency or combined Fe–S deficiency, respectively. Interestingly, for the first time, a mugineic acid derivative is detected in dicot plants root exudates. The results seem to support the hypothesis of the co-existence of the two Fe acquisition strategies in tomato plants.
Lingua originaleEnglish
pagine (da-a)4038-4038
Numero di pagine1
RivistaInternational Journal of Molecular Sciences
Volume21
DOI
Stato di pubblicazionePubblicato - 2020

Keywords

  • iron
  • metabolomics
  • mugineic acid
  • nutrient deficiency
  • nutrient interaction
  • phytosiderophores
  • root exudates
  • strategy I
  • strategy II
  • sulfur

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