Abstract
In Europe and the Mediterranean region, ‘Candidatus Liberibacter solanacearum’ (Lso) is associated with emerging diseases of Apiaceae crops, mainly carrot. Emergency measures for import of carrot seed were set, requiring seed to be heat-treated at 50°C or tested as Lso-negative by PCR. The germination response to heat treatment was assessed for 24 carrot cultivar and hybrid seed lots. Ten parsley, five fennel, and two celery seed lots were also analysed. Of these 41 seed lots, 21 were Lso-infected. Water heat treatment significantly decreased germinability compared to dry heat treatment, indicating that dry heat treatment is a cheaper and less detrimental procedure. However, the dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot, four of ten parsley seed lots, three of five fennel seed lots, and one of two celery seed lots. For parsley, the heat treatment reduced germinability to a lesser extent in Lso-infected than Lso-free seed lots. These data show that heat treatment can affect the germination of Apiaceae seeds to varying degrees, depending on species or variety, the type of heat treatment, and the sanitary status of the seeds.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
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Claims 6
Claim · model-written summary
Water heat treatment significantly reduced germinability relative to dry heat treatment.
- Taxon
- carrot
Daucus carotat0 - Treatment
- Water heat treatmente0
- Outcome
- germinabilitye0
- Direction
- decreasede0
- Comparator
- dry heat treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water heat treatment significantly decreased germinability compared to dry heat treatment”
t0“carrot”
Claim · model-written summary
Dry heat significantly reduced germination in four of 24 carrot seed lots versus untreated controls.
- Taxon
- carrotDaucus carotae0
- Treatment
- dry heat treatmente0
- Outcome
- seed germinatione0
- Direction
- decreasede0
- Value
- four of 24 seed lotse0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot”
Claim · model-written summary
Dry heat significantly reduced germination in four of ten parsley seed lots.
- Taxon
- parsley
Petroselinum crispume0 - Treatment
- dry heat treatmente0
- Outcome
- seed germinatione0
- Direction
- decreasede0
- Value
- four of ten parsley seed lotse0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot, four of ten parsley seed lots”
Claim · model-written summary
Dry heat significantly reduced germination in three of five fennel seed lots.
- Taxon
- fennel
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=60)
Anethum foeniculume0 - Treatment
- dry heat treatmente0
- Outcome
- seed germinatione0
- Direction
- decreasede0
- Value
- three of five fennel seed lotse0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=500)
Verbatim
e0“dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot, four of ten parsley seed lots, three of five fennel seed lots”
Claim · model-written summary
Dry heat significantly reduced germination in one of two celery seed lots.
- Taxon
- celery
%2C_Elswick%2C_Northumberland_4.jpg?width=60)
Apium graveolens Dulce Groupe0 - Treatment
- dry heat treatmente0
- Outcome
- seed germinatione0
- Direction
- decreasede0
- Value
- one of two celery seed lotse0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot, four of ten parsley seed lots, three of five fennel seed lots, and one of two celery seed lots”
Claim · model-written summary
Heat treatment reduced parsley germinability less in Lso-infected than Lso-free seed lots.
- Taxon
- parsleyPetroselinum crispume0
- Treatment
- heat treatmente0
- Interactor
- Lsoe0pathogen
- Outcome
- germinabilitye0
- Direction
- reducede0
- Qualifier
- Lso-infectede0
- Comparator
- Lso-free seed lotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For parsley, the heat treatment reduced germinability to a lesser extent in Lso-infected than Lso-free seed lots.”
The same questions in other papers
heat · growth · Daucus carota (carrot)Results differ
8 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- negative
6 papers more in this group
See all 10 papers →heat · growth · Petroselinum crispum (parsley)Positive and negative results
1 in the opposite direction
- negative
heat · growth · Apium graveolensPositive and negative results
3 in the opposite direction
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.