Partial purification of Thai isolate of citrus huanglongbing (greening) bacterium and antiserum production for serological diagnosis

We aimed to improve the purification of citrus Huanglongbing (greening) bacterium (HB), Candidatus Liberobacter asiaticum and to produce an antiserum against HB. Periwinkle plants Catharantus roseum L. graft-inoculated with HB were used to produce an antiserum. All young leaves of new shoots incubat...

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Bibliographic Details
Published in:Journal of general plant pathology : JGPP 2002-12, Vol.68 (4), p.372-377
Main Authors: Ohtsu, Y. (National Inst. of Fruit Tree Science, Tsukuba, Ibaraki (Japan)), Prommintara, M, Okuda, S, Goto, T, Kano, T, Nakashima, K, Koizumi, M, Imada, J, Kawashima, K
Format: Article
Language:English
Subjects:
BACTERIA
CITRUS
Citrus fruits
DIAGNOSIS
Fruits
GREENING
IMMUNE SERUM
IMMUNOLOGICAL TECHNIQUES
Leaves
PATHOGENS
Plant pathology
Plant populations
PURIFICATION
THAILAND
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Summary:We aimed to improve the purification of citrus Huanglongbing (greening) bacterium (HB), Candidatus Liberobacter asiaticum and to produce an antiserum against HB. Periwinkle plants Catharantus roseum L. graft-inoculated with HB were used to produce an antiserum. All young leaves of new shoots incubated at 20-25 degrees C and 25-30 degrees C, a few mature leaves incubated at 20-25 degrees C, and all mature leaves incubated first at 25-30 degrees C and later transferred to 20-25 degrees C developed yellowing symptoms and were then used to prepare immunogen. The HB was partially purified from these leaves by an improved method that included a macerating enzyme treatment of the midribs of infected leaves and homogenization of infected phloem sieve tissues. An antiserum raised against partially purified HB reacted clearly at a dilution of 1/16 with HB-infected citrus extract prepared at a concentration of 40 times, but did not react with healthy or tristeza virus-infected citrus extract in microprecipitin tests. [PUBLICATION ABSTRACT]
ISSN:1345-2630
1610-739X
DOI:10.1007/PL00013105