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Gardner JM, Feldman AW, Zablotowicz RM. Identity and behavior of xylem-residing bacteria in rough lemon roots of Florida citrus trees. Appl Environ Microbiol. 1982;43(6):1335-42doi: 10.1128/aem.43.6.1335-1342.1982.
Gardner, J. M., Feldman, A. W., & Zablotowicz, R. M. (1982). Identity and behavior of xylem-residing bacteria in rough lemon roots of Florida citrus trees. Applied and environmental microbiology, 43(6), 1335-42. https://doi.org/10.1128/aem.43.6.1335-1342.1982
Gardner, J M, et al. "Identity and behavior of xylem-residing bacteria in rough lemon roots of Florida citrus trees." Applied and environmental microbiology vol. 43,6 (1982): 1335-42. doi: https://doi.org/10.1128/aem.43.6.1335-1342.1982
Gardner JM, Feldman AW, Zablotowicz RM. Identity and behavior of xylem-residing bacteria in rough lemon roots of Florida citrus trees. Appl Environ Microbiol. 1982 Jun;43(6):1335-42. doi: 10.1128/aem.43.6.1335-1342.1982. PMID: 16346030; PMCID: PMC244237.
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Appl Environ Microbiol. 1982 Jun;43(6):1335-42. doi: 10.1128/aem.43.6.1335-1342.1982.

Identity and behavior of xylem-residing bacteria in rough lemon roots of Florida citrus trees.

Applied and environmental microbiology

J M Gardner, A W Feldman, R M Zablotowicz

Affiliations

  1. Institute of Food and Agricultural Sciences, Agricultural Research and Education Center, University of Florida, Lake Alfred, Florida 33850.

PMID: 16346030 PMCID: PMC244237 DOI: 10.1128/aem.43.6.1335-1342.1982

Abstract

An aseptic vacuum extraction technique was used to obtain xylem fluid from the roots of rough lemon (Citrus jambhiri Lush.) rootstock of Florida citrus trees. Bacteria were consistently isolated from vascular fluid of both healthy and young tree decline-affected trees. Thirteen genera of bacteria were found, the most frequently occurring genera being Pseudomonas (40%), Enterobacter (18%), Bacillus, Corynebacterium, and other gram-positive bacteria (16%), and Serratia (6%). Xylem bacterial counts fluctuated seasonally. Bacterial populations ranged from 0.1 to 22 per mm of root tissue (about 10 to 2 x 10 bacteria per g of xylem) when bacterial counts were made on vascular fluid, but these numbers were 10- to 1,000-fold greater when aseptically homogenized xylem tissue was examined similarly. Some of the resident bacteria (4%) are potentially phytopathogenic. It is proposed that xylem bacteria have an important role in the physiology of citrus.

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