Abstract
Some genetic and physiological aspects of seed germination of wild and weedy sunflowers were investigated in order to analyze their population differentiation in seed characteristics. Seed germination of six populations classified on the basis of morphology as Helianthus exilis Gray, H. exilis-bolanderi hybrids, and H. bolanderi Gray was studied under red light at 20 C. The average germination of the three groups respectively were 56, 63, and 42%. Germinability of individual plant progenies derived from populations of H. bolanderi and H. exilis was studied under red and far-red light combined with the pretreatments at two temperatures (10 and 20 C). Average germination per progeny reached a maximum of 59% with red light and 10 C in H. bolanderi . Far-red light promoted germination of H. bolanderi but was ineffective with H. exilis . The homogeneity of populations within each taxon and the fact that germinability differences among the H. bolanderi progenies were consistent over replications, suggest a genetic component of variation. However, progenies obtained by crossing selected individuals that germinated under certain light and temperature treatments, were not significantly correlated in germinability with that of their parents. Inheritance of germination characteristics appears to be complex and highly dependent on the environmental conditions.
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Claims 7
Claim · model-written summary
Average germination of the three sunflower groups under red light at 20 C was 56, 63 and 42%.
- Taxon
- Helianthus
Helianthust0 - Outcome
- average germination of the three groupse1
- Value
- 56, 63, and 42%e1
- Qualifier
- respectivelye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e1“The average germination of the three groups respectively were 56, 63, and 42%”
Claim · model-written summary
Germination per H. bolanderi progeny reached a maximum of 59% under red light and 10 C.
- Taxon
- HelianthusHelianthust0
- Material
- H. bolanderie2
- Treatment
- red light and 10 Ce2
- Outcome
- Average germination per progenye2
- Value
- 59%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e2“Average germination per progeny reached a maximum of 59% with red light and 10 C in H. bolanderi”
Claim · model-written summary
Far-red light promoted germination of H. bolanderi.
- Taxon
- HelianthusHelianthust0
- Material
- H. bolanderie3
- Treatment
- Far-red lighte3
- Outcome
- germinatione3
- Direction
- promotede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e3“Far-red light promoted germination of H. bolanderi but was ineffective with H. exilis”
Claim · model-written summary
Far-red light was ineffective for germination of H. exilis.
- Taxon
- HelianthusHelianthust0
- Material
- H. exilise3
- Treatment
- Far-red lighte3
- Outcome
- germinatione3
- Direction
- ineffectivee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e3“Far-red light promoted germination of H. bolanderi but was ineffective with H. exilis”
Claim · model-written summary
Germinability differences among H. bolanderi progenies were consistent over replications, suggesting a genetic component of variation.
- Taxon
- HelianthusHelianthust0
- Outcome
- germinability differences among the H. bolanderi progeniese4
- Qualifier
- suggest a genetic component of variatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e4“the fact that germinability differences among the H. bolanderi progenies were consistent over replications, suggest a genetic component of variation”
Claim · model-written summary
Progenies from crosses of selected germinating individuals were not significantly correlated in germinability with their parents.
- Taxon
- HelianthusHelianthust0
- Material
- progeniese5
- Outcome
- germinabilitye5
- Direction
- not significantly correlatede5
- Comparator
- their parentse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e5“progenies obtained by crossing selected individuals that germinated under certain light and temperature treatments, were not significantly correlated in germinability with that of their parents”
Claim · model-written summary
Inheritance of germination characteristics appears complex and highly dependent on environmental conditions.
- Taxon
- HelianthusHelianthust0
- Outcome
- Inheritance of germination characteristicse6
- Qualifier
- complex and highly dependent on the environmental conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower(Helianthus)Species”
e6“Inheritance of germination characteristics appears to be complex and highly dependent on the environmental conditions”
The same questions in other papers
light · growth · Helianthus (sunflowers)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 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.