Abstract
Agriculture in semiarid regions commonly face problems because of salt and availability of irrigation water. Considering this, studies on cultures resistant to salt and water stresses involving sweet sorghum are required. Therefore, the aim was to evaluate the growth and other mechanisms of tolerance to salinity and water deficit in BRS 506 sweet sorghum. The experimental design was conducted in Upanema-RN, Brazil, in randomized blocks, where the isolated and interactive effect of 3 salinity levels, expressed as the electrical conductivity of irrigation water (1.5, 3.8, and 6.0 dS m−1), and 3 irrigation depths (55, 83, and 110% of crop evapotranspiration) were evaluated. During the cycle, sorghum adapted to the salinity and deficit irrigation depth, since stem height reduced only −5.5% with increasing salinity and −11.95% with decreasing irrigation depth, and aerial dry mass was affected by interaction only at the end of the cycle. Proline, total amino acids, and total soluble sugars were not differenced by stresses. Additionally, around 68.71% of total Na+ was at roots at the end of the cycle. In summary, sorghum BRS 506 was more tolerant to salt than water stress and used Na+ compartmentalization in root cells as the main tolerance mechanism.
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Claims 7
Claim · model-written summary
Increasing salinity reduced stem height by 5.5%.
- Taxon
- Sweet Sorghumt0
- Treatment
- increasing salinitye1
- Outcome
- stem heighte1
- Direction
- reducede1
- Value
- −5.5%e1
Not reportedComparator
Verbatim
t0“Sweet Sorghum”
e1“stem height reduced only −5.5% with increasing salinity”
Claim · model-written summary
Decreasing irrigation depth reduced stem height by 11.95%.
- Taxon
- Sweet Sorghumt0
- Treatment
- decreasing irrigation depthe1
- Outcome
- stem heighte2
- Direction
- reducede2
- Value
- −11.95%e1
Not reportedComparator
Verbatim
t0“Sweet Sorghum”
e1“−11.95% with decreasing irrigation depth”
e2“stem height reduced only −5.5% with increasing salinity and −11.95% with decreasing irrigation depth”
Claim · model-written summary
Aerial dry mass showed an interaction effect only at cycle end.
Not reportedDirection
Verbatim
t0“Sweet Sorghum”
e1“aerial dry mass was affected by interaction only at the end of the cycle”
Claim · model-written summary
Proline, total amino acids and soluble sugars did not differ under stresses.
- Taxon
- Sweet Sorghumt0
- Treatment
- stressese1
- Outcome
- Proline, total amino acids, and total soluble sugarse1
- Direction
- not differencede1
Not reportedComparator
Verbatim
t0“Sweet Sorghum”
e1“Proline, total amino acids, and total soluble sugars were not differenced by stresses”
Claim · model-written summary
Roots contained about 68.71% of total sodium at cycle end.
Verbatim
t0“Sweet Sorghum”
e1“around 68.71% of total Na+ was at roots at the end of the cycle”
Claim · model-written summary
BRS 506 was more tolerant of salt than water stress.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Sorghum”
e1“sorghum BRS 506 was more tolerant to salt than water stress”
Claim · model-written summary
The authors identify sodium compartmentalization in roots as the main tolerance mechanism.
Verbatim
t0“Sweet Sorghum”
e1“used Na+ compartmentalization in root cells as the main tolerance mechanism”
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