Abstract
The role of irradiance and/or ethylene in inducing mortality and self-branching disorders in Gerbera jamesonii Bolus. seedlings was studied. Seedling mortality increased from 8% to 57% when seed was covered with vermiculite than left uncovered during germination. Supplemental lighting for 30 days after germination decreased seedling mortality and decreased the time to visible bud compared to seed germinated under natural light only. In subsequent experiments, seeds were germinated and then seedlings were water logged or sprayed with ethephon (0.69, 3.45, or 17.25 mM) at four different stages of seedling development. Half of the ethephon-treated seedlings were sprayed with silver thiosulfate (STS). Seedling mortality was greatest after cotyledon expansion but before expansion of the first tree leaf. The highest ethephon concentration caused reduced seedling dry weight after 42 days. Applying STS did not overcome self-branching or meristem necrosis.
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Claims 6
Claim · model-written summary
Covering seed with vermiculite during germination increased Gerbera jamesonii seedling mortality from 8% to 57% compared with uncovered seed.
- Taxon
- Gerbera jamesonii
Gerbera jamesoniie0 - Treatment
- covered with vermiculitee1
- Outcome
- Seedling mortalitye1
- Direction
- increasede1
- Value
- 8% to 57%e1
- Comparator
- left uncoverede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e1“Seedling mortality increased from 8% to 57% when seed was covered with vermiculite than left uncovered during germination”
Claim · model-written summary
Supplemental lighting for 30 days after germination decreased Gerbera jamesonii seedling mortality compared with germination under natural light only.
- Taxon
- Gerbera jamesoniiGerbera jamesoniie0
- Treatment
- Supplemental lighting for 30 days after germinatione2
- Outcome
- seedling mortalitye2
- Direction
- decreasede2
- Comparator
- seed germinated under natural light onlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e2“Supplemental lighting for 30 days after germination decreased seedling mortality and decreased the time to visible bud compared to seed germinated under natural light only”
Claim · model-written summary
Supplemental lighting for 30 days after germination decreased the time to visible bud of Gerbera jamesonii compared with germination under natural light only.
- Taxon
- Gerbera jamesoniiGerbera jamesoniie0
- Treatment
- Supplemental lighting for 30 days after germinatione2
- Outcome
- the time to visible bude2
- Direction
- decreasede2
- Comparator
- seed germinated under natural light onlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e2“Supplemental lighting for 30 days after germination decreased seedling mortality and decreased the time to visible bud compared to seed germinated under natural light only”
Claim · model-written summary
Gerbera jamesonii seedling mortality was greatest after cotyledon expansion but before expansion of the first tree leaf.
- Taxon
- Gerbera jamesoniiGerbera jamesoniie0
- Organ / stage
- after cotyledon expansion but before expansion of the first tree leafe3
- Outcome
- Seedling mortalitye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e3“Seedling mortality was greatest after cotyledon expansion but before expansion of the first tree leaf”
Claim · model-written summary
The highest ethephon concentration reduced Gerbera jamesonii seedling dry weight after 42 days.
- Taxon
- Gerbera jamesoniiGerbera jamesoniie0
- Treatment
- highest ethephon concentratione4
- Outcome
- seedling dry weighte4
- Direction
- reducede4
- Qualifier
- after 42 dayse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e4“The highest ethephon concentration caused reduced seedling dry weight after 42 days”
Claim · model-written summary
Applying STS did not overcome self-branching or meristem necrosis in ethephon-treated Gerbera jamesonii seedlings.
- Taxon
- Gerbera jamesoniiGerbera jamesoniie0
- Treatment
- STSe6
- Outcome
- self-branching or meristem necrosise6
- Direction
- did not overcomee6
- Comparator
- ethephon-treated seedlingse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gerbera jamesonii Bolus. seedlings”
e5“Half of the ethephon-treated seedlings were sprayed with silver thiosulfate (STS)”
e6“Applying STS did not overcome self-branching or meristem necrosis”
The same questions in other papers
light · pest · Gerbera jamesonii (Transvaal daisy)Positive and negative results
1 in the opposite direction
- negative
growing medium · pest · Gerbera jamesonii (Transvaal daisy)Results agree
1 paper in the same direction as this paper
- negative
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.