Claim · model-written summary
Leonardy grapefruit was more susceptible and symptomatic than Duncan.
Not reportedTaxonGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Verbatim
e0“Leonardy was. observed to be relatively more susceptible and showed more severe symptoms than Duncan”
Title
A. S. Costa; T. J. Grant; S. Moreira Bragantia 1949. doi:10.1590/s0006-87051949000100008
Other claims from this paper (19)
- Association Tristeza infection susceptibility correlated with symptom severity across citrus types.
- Observation Sweet oranges were most susceptible and had severe symptoms.
- Observation Barão sweet orange was more susceptible than Valencia.
- Observation Mandarins resisted infection somewhat but had severe symptoms when infected.
- Observation Tolerant tangelos were highly susceptible and developed severe symptoms.
- Observation Non-tolerant tangelos, susceptible citranges and grapefruits had medium susceptibility and moderately severe symptoms.
- Observation Pummelos, shaddocks and sour oranges were relatively resistant and showed only moderate symptoms when infected.
- Intervention effect Sour oranges were infected more easily by tissue union than aphid vector.
- Observation Poncirus trifoliata, citrumelos and resistant citranges remained symptom-free and virus-free after three inoculations.
- Observation A sour orange intergraft showed constricted growth despite continuing sweet stem growth.
- Mechanism Root death in infected grafts was interpreted mainly as a secondary reaction.
- Observation Tristeza virus was recovered from protected sprouts of severed Caipira sweet orange roots.
- Observation Fifty citrus seedling types developed tristeza symptoms after heavy aphid inoculation.
- Observation Some citrange progeny permitted virus increase whereas others did not.
- Association Trifoliate leaf shape was unrelated to inability to permit virus increase.
- Observation Citrange backcrosses to sweet orange tended to resemble the sweet orange parent.
- Observation Most citrumelos behaved like P. trifoliata.
- Observation Tangelos varied between mandarin-like tolerant tissues and grapefruit-like non-tolerant tissues.
- Mechanism Virus was confined to inoculated ringed branches over 16 months, supporting phloem-limited movement.