Abstract
In the Indonesian Citrus Variety Improvement Programme all varieties are being cleaned up by shoot-tip grafting (STG) without preliminary heat treatment. Amongst mandarins, 80% of regrafted plants originating from STG are negative for citrus tristeza virus (CTV) by enzymelinked immunosorbent assay (ELISA), whereas the corresponding figure for sweet oranges is only 60%. Of the sweet oranges showing positive for CTV by ELlSA 31% eventually show stem-pitting. Although some plants without stem-pitting give a high optical density (OD) readings by ELlSA there is a significant difference in mean OD between those plants with stem-pitting and those without. The average time of recording for stem-pitting is 18 months after STG. There appears to be varietal differences in the ability of STG to separate out stem-pitting strains.
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Claims 5
Claim · model-written summary
Eighty percent of regrafted mandarin plants were negative for citrus tristeza virus.
- Taxon
- mandarinse0
- Interactor
- citrus tristeza virusCitrus tristeza viruse0pathogen
- Outcome
- negative for citrus tristeza virus (CTV)e0
- Value
- 80%e0
Verbatim
e0“Amongst mandarins, 80% of regrafted plants originating from STG are negative for citrus tristeza virus (CTV) by enzymelinked immunosorbent assay (ELISA)”
Claim · model-written summary
Sixty percent of regrafted sweet orange plants were negative for citrus tristeza virus.
- Taxon
- sweet oranges
Citrus sinensise0 - Interactor
- citrus tristeza virusCitrus tristeza viruse0pathogen
- Outcome
- negative for citrus tristeza virus (CTV)e0
- Value
- 60%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amongst mandarins, 80% of regrafted plants originating from STG are negative for citrus tristeza virus (CTV) by enzymelinked immunosorbent assay (ELISA), whereas the corresponding figure for sweet oranges is only 60%.”
Claim · model-written summary
Thirty-one percent of virus-positive sweet oranges eventually showed stem pitting.
- Taxon
- sweet orangesCitrus sinensise0
- Interactor
- CTVe0pathogen
- Outcome
- stem-pittinge0
- Value
- 31%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the sweet oranges showing positive for CTV by ELlSA 31% eventually show stem-pitting.”
Claim · model-written summary
Mean ELISA optical density differed significantly between plants with and without stem pitting.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is a significant difference in mean OD between those plants with stem-pitting and those without”
t0“Stem Pitting Strains of Citrus Tristeza Virus in Indonesia”
Claim · model-written summary
Stem pitting was recorded an average of 18 months after shoot-tip grafting.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average time of recording for stem-pitting is 18 months after STG.”
t0“Stem Pitting Strains of Citrus Tristeza Virus in Indonesia”