Abstract
Germination in lettuce ( Lactuca sativa ) seeds can be inhibited by high temperatures (thermoinhibition) or darkness (positive photoblasticity). Priming is commonly used as a seed treatment to avoid these problems. However, this treatment is complicated, expensive and has detrimental effect on seed longevity. The objectives of this study were to 1) develop a simple alternative treatment to priming, based on red light irradiations and 2) to develop a treatment to extend seed longevity. Lettuce seeds from cultivars Tango, Milanesa, Ideal Cos, and Gallega de Invierno were partially hydrated in containers with 98% relative humidity (RH) and irradiated with red (R) light for 24 hours, or far-red (FR) light for 216 hours. Throughout the treatment, seeds reached 16% water content and, once finished, they were dried with air at 30 °C. Untreated (control) and primed seeds were also evaluated. Germination was evaluated in light and darkness at temperatures between 12 and 36 °C in a thermogradient table. Effects in longevity were estimated by evaluating germination after various aging periods at 45 °C and 75% RH. The R-light treatment improved germination in the dark at temperatures up to 25 °C, but did not have a significant effect on seed germination under light. Germination after accelerated aging showed that R- and FR- light treatments extended seed longevity when compared with control seeds. Therefore, this effect would not be associated to photoblasticity alleviation or imposition. Primed seeds deteriorated faster than the control. Compared with priming, the R-light treatment was simpler and improved seed longevity. However, priming effects on alleviation of seed photoblasticity and thermoinhibition at temperatures over 25 °C were greater.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Red-light treatment improved lettuce seed germination in the dark at temperatures up to 25 °C.
- Taxon
- Lettuce
Lactuca sativat0 - Treatment
- R-light treatmente0
- Outcome
- germination in the darke0
- Direction
- improvede0
- Qualifier
- at temperatures up to 25 °Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“The R-light treatment improved germination in the dark at temperatures up to 25 °C”
Claim · model-written summary
Red-light treatment did not have a significant effect on lettuce seed germination under light.
- Taxon
- LettuceLactuca sativat0
- Treatment
- R-light treatmente0
- Outcome
- seed germination under lighte0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“The R-light treatment improved germination in the dark at temperatures up to 25 °C, but did not have a significant effect on seed germination under light”
Claim · model-written summary
After accelerated aging, red-light treatment extended lettuce seed longevity compared with control seeds.
- Taxon
- LettuceLactuca sativat0
- Treatment
- R- and FR- light treatmentse0
- Outcome
- seed longevitye0
- Direction
- extendede0
- Comparator
- control seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“Germination after accelerated aging showed that R- and FR- light treatments extended seed longevity when compared with control seeds”
Claim · model-written summary
After accelerated aging, far-red-light treatment extended lettuce seed longevity compared with control seeds.
- Taxon
- LettuceLactuca sativat0
- Treatment
- FR- light treatmentse0
- Outcome
- seed longevitye0
- Direction
- extendede0
- Comparator
- control seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“Germination after accelerated aging showed that R- and FR- light treatments extended seed longevity when compared with control seeds”
Claim · model-written summary
Primed lettuce seeds deteriorated faster than the control.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Primed seedse0
- Outcome
- deterioratede0
- Direction
- fastere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“Primed seeds deteriorated faster than the control”
Claim · model-written summary
Compared with priming, red-light treatment was simpler and improved lettuce seed longevity.
- Taxon
- LettuceLactuca sativat0
- Treatment
- R-light treatmente0
- Outcome
- seed longevitye0
- Direction
- improvede0
- Comparator
- priminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“Compared with priming, the R-light treatment was simpler and improved seed longevity”
Claim · model-written summary
Priming effects on alleviation of seed photoblasticity and thermoinhibition at temperatures over 25 °C were greater than those of the red-light treatment.
- Taxon
- LettuceLactuca sativat0
- Treatment
- priminge0
- Outcome
- alleviation of seed photoblasticity and thermoinhibitione0
- Direction
- greatere0
- Qualifier
- at temperatures over 25 °Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“priming effects on alleviation of seed photoblasticity and thermoinhibition at temperatures over 25 °C were greater”
The same questions in other papers
light · pest · Lactuca sativa (garden lettuce)Positive and negative results
7 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
5 papers more in this group
See all 9 papers →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.