Abstract
Abstract Background Most developing countries are suffering from a decline in agricultural area and fresh water supply due to the adverse effects of climate change. Sunflower has been considered as having the ability to grow under various environmental conditions, tolerating levels considered stresses to other plants. Materials and Methods Thus, two field experiments were conducted in the screen of National Research Centre during two successive summer seasons 2018 and 2019, respectively to investigate the effect of soaking seeds of sunflower plant in different concentrations of chitosan (control, 25, 50 and 75 mg/L) on growth, some physiological parameters, yield and its components and some chemical composition of the yielded seeds of sunflower under different salinity levels (control, 4000 and 8000 mg/l). Results The obtained results showed that salt stress with 4000 mg/L recorded the highest values of all the studied growth characters, photosynthetic pigments, some physiological aspects, seed yield/plant and oil %. On the other hand, the highest values of head diameter, head circumference, weight 50 seed and crude protein were obtained by control treatment. Meanwhile, the highest values of proline and free amino acid were recorded under higher salinity level (8000 mg/L). On the other hand, all chitosan treatments significantly enhanced growth and productivity of sunflower plant. Also, the obtained data that, chitosan concentration (50 mg/L) recorded the highest values of all the studied growth and yield quantity and quality via enhancing photosynthetic pigments and the studied physiological aspects, as compared with other treatments. As for interaction effect, plants treated with chitosan concentration (50 mg/L) under salinity level (4000 mg/L) recorded the highest growth characters, photosynthetic pigments and IAA. While the interaction between chitosan concentrations (50 mg/L) under salinity level (8000 mg/L) recorded the highest yield characters, except for crude protein (75 mg/L chitosan) in control plants (those plants irrigated with tap water). Conclusion In conclusion, chitosan treatments did not only improve plant growth and productivity but also could enhance the reducing effects of salinity stress on growth and productivity of sunflower plant. The most effective concentrations was 50 mg/L on increasing growth and yield of sunflower plant.
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Claims 11
Claim · model-written summary
At 4000 mg/L salinity, growth characters, pigments, physiology, yield and oil percentage were highest.
- Taxon
- sunflower plant
Helianthus annuust0 - Treatment
- salt stress with 4000 mg/Le0
- Outcome
- growth characters, photosynthetic pigments, some physiological aspectse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress with 4000 mg/L recorded the highest values of all the studied growth characters, photosynthetic pigments, some physiological aspects, seed yield/plant and oil %.”
t0“sunflower plant”
Claim · model-written summary
At 4000 mg/L salinity, seed yield per plant and oil percentage were highest.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- salt stress with 4000 mg/Le0
- Outcome
- seed yield/plant and oil %e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress with 4000 mg/L recorded the highest values of all the studied growth characters, photosynthetic pigments, some physiological aspects, seed yield/plant and oil %.”
t0“sunflower plant”
Claim · model-written summary
Control plants had the highest head dimensions and 50-seed weight.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- control treatmente0
- Outcome
- head diameter, head circumference, weight 50 seede0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest values of head diameter, head circumference, weight 50 seed and crude protein were obtained by control treatment.”
t0“sunflower plant”
Claim · model-written summary
Control plants had the highest crude protein.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- control treatmente0
- Outcome
- crude proteine0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest values of head diameter, head circumference, weight 50 seed and crude protein were obtained by control treatment.”
t0“sunflower plant”
Claim · model-written summary
At 8000 mg/L salinity, proline and free amino acid were highest.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- higher salinity level (8000 mg/L)e0
- Outcome
- proline and free amino acide0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest values of proline and free amino acid were recorded under higher salinity level (8000 mg/L).”
t0“sunflower plant”
Claim · model-written summary
Chitosan treatments significantly enhanced sunflower growth and productivity.
- Taxon
- sunflower plantHelianthus annuuse0
- Treatment
- all chitosan treatmentse0
- Outcome
- growth and productivitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all chitosan treatments significantly enhanced growth and productivity of sunflower plant.”
Claim · model-written summary
At 50 mg/L, chitosan produced the highest growth and yield quantity and quality compared with other treatments.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- chitosan concentration (50 mg/L)e0
- Outcome
- growth and yield quantity and qualitye0
- Direction
- higheste0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chitosan concentration (50 mg/L) recorded the highest values of all the studied growth and yield quantity and quality via enhancing photosynthetic pigments and the studied physiological aspects, as compared with other treatments.”
t0“sunflower plant”
Claim · model-written summary
At 50 mg/L, chitosan enhanced pigments and physiological aspects.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- chitosan concentration (50 mg/L)e1
- Outcome
- photosynthetic pigments and the studied physiological aspectse0
- Direction
- enhancinge0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“via enhancing photosynthetic pigments and the studied physiological aspects, as compared with other treatments.”
t0“sunflower plant”
e1“chitosan concentration (50 mg/L) recorded the highest values of all the studied growth and yield quantity and quality via enhancing photosynthetic pigments and the studied physiological aspects, as compared with other treatments.”
Claim · model-written summary
The 50 mg/L chitosan and 4000 mg/L salinity combination gave highest growth, pigments and IAA.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- chitosan concentration (50 mg/L) under salinity level (4000 mg/L)e0
- Outcome
- growth characters, photosynthetic pigments and IAAe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with chitosan concentration (50 mg/L) under salinity level (4000 mg/L) recorded the highest growth characters, photosynthetic pigments and IAA.”
t0“sunflower plant”
Claim · model-written summary
The 50 mg/L chitosan and 8000 mg/L salinity combination produced highest yield characters.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- chitosan concentrations (50 mg/L) under salinity level (8000 mg/L)e0
- Outcome
- yield characterse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chitosan concentrations (50 mg/L) under salinity level (8000 mg/L) recorded the highest yield characters”
t0“sunflower plant”
Claim · model-written summary
Crude protein was highest with 75 mg/L chitosan in control plants.
- Taxon
- sunflower plantHelianthus annuust0
- Treatment
- 75 mg/L chitosane0
- Outcome
- crude proteine0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“except for crude protein (75 mg/L chitosan) in control plants (those plants irrigated with tap water).”
t0“sunflower plant”
The same questions in other papers
chitosan · yield · Helianthus annuus (common sunflower)Results agree
1 paper in the same direction as this paper
- positive
chitosan · physiology: photosynthesis · Helianthus annuus (common sunflower)Results agree
1 paper in the same direction as this paper
- positive
salinity · physiology: photosynthesis · Helianthus annuus (common sunflower)Results differ
1 paper in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- negative
12 papers more in this group
See all 16 papers →salinity · yield · Helianthus annuus (common sunflower)Results differ
1 paper in the same direction as this paper · 22 in the opposite direction
- negative
- no effect
- negative
20 papers more in this group
See all 24 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.