Occurrence of free fatty acids in the phloem sap of different citrus varieties

Plant Signaling & Behavior
Maria Filomena Valim, Nabil Killiny

Abstract

Candidatus Liberibacter asiaticus is a phloem restricted bacterium that causes citrus greening disease or huanglongbing (HLB), a major treat to commercial citrus production in Florida. It is transmitted by the Asian citrus psyllid, a phloem sap-feeding insect. Studies conducted on the composition of citrus phloem sap revealed the presence amino acids, organic acids and sugars and of low amounts of free fatty acids. In the present study, the phloem sap of 12 citrus varieties with different degrees of tolerance to HLB were extracted with ethyl acetate and analyzed by GC-MS after derivatization with boron trifluoride, a fatty acid-specific reagent. Nine free fatty acids were detected in all varieties. Of the 9 fatty acids detected, only capric acid was significantly different among varieties.

References

Apr 2, 2002·Planta·Ewa MadeyJohn E Thompson
Jul 23, 2003·Current Opinion in Plant Biology·Edward E FarmerVenkatesh Krishnamurthy
Mar 24, 2012·Journal of Experimental Botany·Brandon S GueletteSusanne Hoffmann-Benning
May 29, 2012·Frontiers in Plant Science·Urs Florian BenningSusanne Hoffmann-Benning
Feb 28, 2013·Phytopathology·Nian Wang, Pankaj Trivedi

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Citations

Feb 26, 2020·Plants·Giovanni GugliuzzaRiccardo Lo Bianco
Sep 22, 2020·Bioscience Reports·Amanda M Koenig, Susanne Hoffmann-Benning

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