Paper · 2025 · Plants

Morpho-Physiological Adaptation of Sunflower Hybrids to Varying Plant Densities

Antonela Markulj Kulundžić; Ivica Liović; Aleksandra Sudarić; et al.

12
claims
24
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by

Abstract

L.) hybrids (Surimi CL, Integral CL, Alexa SU, Neta SU, and Davero SU) to three planting densities (84,034, 68,027, and 57,143 plants/ha) in terms of agronomic performance and photosynthetic efficiency. Higher plant density reduced leaf area and seed weight but enhanced uniformity of head formation. Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability. In contrast, Davero SU performed best under low density, characterized by greater leaf expansion, seed filling, and overall productivity. These findings highlight the potential of integrating physiological and agronomic traits to inform hybrid-specific planting density optimization under diverse environmental conditions.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 12

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher density reduced leaf area.

Taxon
SunflowerHelianthus annuust0
Treatment
Higher plant densitye0
Outcome
leaf areae0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Higher plant density reduced leaf area and seed weight but enhanced uniformity of head formation.”

✓ located verbatim in the source · abstract, characters 203–300 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher density reduced seed weight.

Taxon
SunflowerHelianthus annuust0
Treatment
Higher plant densitye0
Outcome
seed weighte0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Higher plant density reduced leaf area and seed weight but enhanced uniformity of head formation.”

✓ located verbatim in the source · abstract, characters 203–300 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Higher density enhanced uniformity of head formation.

Taxon
SunflowerHelianthus annuust0
Treatment
Higher plant densitye0
Outcome
uniformity of head formatione0
Direction
enhancede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Higher plant density reduced leaf area and seed weight but enhanced uniformity of head formation.”

✓ located verbatim in the source · abstract, characters 203–300 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Integral CL maintained higher chlorophyll content under high density.

Taxon
SunflowerHelianthus annuust0
Material
Integral CLe0
Outcome
chlorophyll contente0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Integral CL maintained higher photosynthetic activity under high density.

Taxon
SunflowerHelianthus annuust0
Material
Integral CLe0
Outcome
photosynthetic activitye0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Integral CL maintained higher yield stability under high density.

Taxon
SunflowerHelianthus annuust0
Material
Integral CLe0
Outcome
yield stabilitye0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Surimi CL maintained higher chlorophyll content under high density.

Taxon
SunflowerHelianthus annuust0
Material
Surimi CLe0
Outcome
chlorophyll contente0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Surimi CL maintained higher photosynthetic activity under high density.

Taxon
SunflowerHelianthus annuust0
Material
Surimi CLe0
Outcome
photosynthetic activitye0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Surimi CL maintained higher yield stability under high density.

Taxon
SunflowerHelianthus annuust0
Material
Surimi CLe0
Outcome
yield stabilitye0
Direction
highere0
Setting
high densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Among the tested hybrids, Integral CL and Surimi CL demonstrated superior performance under high density, maintaining higher chlorophyll content, photosynthetic activity, and yield stability.”

✓ located verbatim in the source · abstract, characters 301–492 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Davero SU had greater leaf expansion under low density.

Taxon
SunflowerHelianthus annuust0
Material
Davero SUe0
Outcome
leaf expansione0
Direction
greatere0
Setting
low densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“In contrast, Davero SU performed best under low density, characterized by greater leaf expansion, seed filling, and overall productivity.”

✓ located verbatim in the source · abstract, characters 493–630 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Davero SU had greater seed filling under low density.

Taxon
SunflowerHelianthus annuust0
Material
Davero SUe0
Outcome
seed fillinge0
Direction
greatere0
Setting
low densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“In contrast, Davero SU performed best under low density, characterized by greater leaf expansion, seed filling, and overall productivity.”

✓ located verbatim in the source · abstract, characters 493–630 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Davero SU had greater overall productivity under low density.

Taxon
SunflowerHelianthus annuust0
Material
Davero SUe0
Outcome
overall productivitye0
Direction
greatere0
Setting
low densitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“In contrast, Davero SU performed best under low density, characterized by greater leaf expansion, seed filling, and overall productivity.”

✓ located verbatim in the source · abstract, characters 493–630 · show in text ↑
t0

“Sunflower”

✓ located verbatim in the source · title, characters 35–44 · show in text ↑

density · growth · Helianthus annuus (common sunflower)Positive and negative results

22 papers: 17 positive, 5 negative or no effect

4 papers in the same direction as this paper · 17 in the opposite direction

  1. positive
    Lower planting density gave greater leaf area.

    Response of sunflower cultivars to plant density and nitrogen · 1985 · compared with higher plant density (11·1 plants/m 2 )

    Opposite direction

  2. positive
  3. positive

18 papers more in this group

See all 22 papers →

density · yield · Helianthus annuus (common sunflower)Positive and negative results

85 papers: 70 positive, 15 negative or no effect

14 papers in the same direction as this paper · 70 in the opposite direction

  1. positive
  2. positive
  3. positive

81 papers more in this group

See all 85 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.