Abstract
Water stress is likely the most important factor that adversely affects plant growth and development. In our study two inbred lines of sunflower (Helianthus annuus L.) with contrasting behavior to water deficit, the inbred lines B59, sensitive, and B71, tolerant, were subjected to water stress and compared in terms of growth parameters, relative water content, photosynthetic pigments and osmo-compatibles contents. Mannitol treatment generated a moderate water stress which resulted in a relative water content decline in both lines. In aerial part of B59 and B71 stressed-seedlings, a dramatic reduction of osmotic potential was observed, although in B71 the osmotic potential was 1.8-fold lower than in B59. The B71 line recovered the osmotic potential to control values after 8 d of re-watering. Several morphological parameters were altered by the water stress. Shoot and root relative fresh weight decreased in both lines under water stress, although B71 showed a minor drop. However, the root was less affected than the shoot in stress condition and recovery period. Water stress was affected in a greater proportion shoot dry weight (DW) than root DW in B59 and B71 lines. Nevertheless, a significant increase in root DW/shoot DW ratio was observed in stressed seedlings. A higher reduction in the individual leaf area was observed in B71 line under stress. The basal chlorophyll content was higher in the tolerant line B71 than in the sensitive B59, and carotenoids showed a high content in B71 control and stressed seedlings. Under water stress, the aerial and root proline content increased in the tolerant B71 line. Glycinebetaine decreased significantly in the aerial part of both lines in response to water stress indicating that this compound is not the main osmo-regulator. In conclusion, B71 has suitable mechanisms to enable it to respond more effectively to moderate water stress.
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 16
Claim · model-written summary
Mannitol stress reduced relative water content in both sunflower lines.
- Taxon
- sunflower (Helianthus annuus L.)
Helianthus annuuse1 - Material
- both linese0
- Treatment
- Mannitol treatmente0
- Outcome
- relative water contente0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mannitol treatment generated a moderate water stress which resulted in a relative water content decline in both lines.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Water stress reduced aerial osmotic potential in both sunflower lines.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B59 and B71e0
- Organ / stage
- aerial parte0
- Treatment
- stressed-seedlingse0
- Outcome
- osmotic potentiale0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In aerial part of B59 and B71 stressed-seedlings, a dramatic reduction of osmotic potential was observed”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Under stress, B71 had 1.8-fold lower osmotic potential than B59.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- osmotic potentiale0
- Direction
- lowere0
- Value
- 1.8-folde0
- Comparator
- B59e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in B71 the osmotic potential was 1.8-fold lower than in B59”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
B71 osmotic potential recovered to control values after eight days of rewatering.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- osmotic potentiale0
- Direction
- recoverede0
- Value
- 8 de0
- Comparator
- control valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B71 line recovered the osmotic potential to control values after 8 d of re-watering.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Water stress decreased shoot and root relative fresh weight in both lines.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- both linese0
- Treatment
- water stresse0
- Outcome
- Shoot and root relative fresh weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root relative fresh weight decreased in both lines under water stress, although B71 showed a minor drop.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
B71 had a smaller decline in relative fresh weight than B59 under water stress.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse2
- Material
- B71e1
- Outcome
- relative fresh weighte0
- Direction
- minor drope0
- Comparator
- B59e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root relative fresh weight decreased in both lines under water stress, although B71 showed a minor drop.”
e1“the inbred lines B59, sensitive, and B71, tolerant”
e2“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Roots were less affected than shoots during stress and recovery.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Outcome
- root was less affectede0
- Direction
- less affectede0
- Qualifier
- stress condition and recovery periode0
- Comparator
- shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root was less affected than the shoot in stress condition and recovery period.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Water stress affected shoot dry weight more than root dry weight in both lines.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B59 and B71e0
- Outcome
- shoot dry weight (DW)e0
- Direction
- greater proportione0
- Comparator
- root DWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress was affected in a greater proportion shoot dry weight (DW) than root DW in B59 and B71 lines.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Stress increased the root to shoot dry weight ratio in seedlings.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Treatment
- stressed seedlingse0
- Outcome
- root DW/shoot DW ratioe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant increase in root DW/shoot DW ratio was observed in stressed seedlings.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
B71 had a greater reduction in individual leaf area under stress.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- individual leaf areae0
- Direction
- higher reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A higher reduction in the individual leaf area was observed in B71 line under stress.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Basal chlorophyll content was higher in B71 than B59.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- basal chlorophyll contente0
- Direction
- highere0
- Comparator
- B59e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The basal chlorophyll content was higher in the tolerant line B71 than in the sensitive B59”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
B71 had high carotenoid content in control and stressed seedlings.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- carotenoids showed a high contente0
- Direction
- highe0
- Qualifier
- control and stressed seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carotenoids showed a high content in B71 control and stressed seedlings.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Water stress increased aerial and root proline content in B71.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Treatment
- water stresse0
- Outcome
- aerial and root proline contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress, the aerial and root proline content increased in the tolerant B71 line.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
Water stress significantly decreased aerial glycinebetaine in both lines.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- both linese0
- Organ / stage
- aerial parte0
- Treatment
- water stresse0
- Outcome
- Glycinebetainee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycinebetaine decreased significantly in the aerial part of both lines in response to water stress”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
The authors infer glycinebetaine is not the main osmotic regulator.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse2
- Compound
- Glycinebetainee1
- Outcome
- not the main osmo-regulatore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating that this compound is not the main osmo-regulator.”
e1“Glycinebetaine decreased significantly in the aerial part of both lines in response to water stress”
e2“two inbred lines of sunflower (Helianthus annuus L.)”
Claim · model-written summary
The authors conclude B71 responds more effectively to moderate water stress.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuuse1
- Material
- B71e0
- Outcome
- respond more effectively to moderate water stresse0
- Direction
- more effectivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B71 has suitable mechanisms to enable it to respond more effectively to moderate water stress.”
e1“two inbred lines of sunflower (Helianthus annuus L.)”
The same questions in other papers
drought · growth · Helianthus annuus (common sunflower)Results differ
49 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
55 papers more in this group
See all 59 papers →drought · physiology: osmolytes · Helianthus annuus (common sunflower)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
5 papers more in this group
See all 9 papers →drought · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
13 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.