Abstract
To appraise the effect the foliar application of triacontanol (TRIA) on sunflower (Helianthus annuus L.) under saline stress, a pot experiment was conducted under natural conditions. Two sunflower cultivars (SMH-907 and SMH917) were grown in sand culture medium supplemented with full strength Hoagland’s nutrient solution for 25 days, after which time, two saline regimes [control (0 mM) and saline (150 mM)] were applied. Three TRIA levels [0 (water spray), 50 and 100 µM] were applied as foliar spray on 44-day old plants. Plants were harvested after 4 weeks of TRIA application. The root growing medium saline stress significantly reduced shoot and root fresh weights and their lengths, net CO2 assimilation rate (A), transpiration rate (E), water use efficiency (WUE), co-efficient of nonphotochemical quenching (qN) and non-photochemical quenching (NPQ) in both sunflower cultivars. Foliar-applied TRIA markedly increased shoot and root fresh weights and lengths, A, E, stomatal conductance and WUE in both cultivars under both saline and non-saline regimes. TRIA did not show prominent effect on chlorophyll fluorescence attributes such as electron transport rate and photochemical quenching of sunflower plants. The TRIA level 100 µM was more effective as compared to the others and sunflower cultivar SMH-917 showed better performance than those of cv. SMH-907 in terms of different attributes measured in this study.
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Claims 9
Claim · model-written summary
Salinity reduced sunflower shoot and root fresh weights and lengths in both cultivars.
- Taxon
- SUNFLOWER
Helianthus annuust0 - Treatment
- saline stresse0
- Outcome
- shoot and root fresh weights and their lengthse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saline stress significantly reduced shoot and root fresh weights and their lengths”
t0“SUNFLOWER”
Claim · model-written summary
Salinity reduced sunflower net CO2 assimilation, transpiration, and water use efficiency.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- saline stresse0
- Outcome
- net CO2 assimilation rate (A), transpiration rate (E), water use efficiency (WUE)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saline stress significantly reduced shoot and root fresh weights and their lengths, net CO2 assimilation rate (A), transpiration rate (E), water use efficiency (WUE)”
t0“SUNFLOWER”
Claim · model-written summary
Salinity reduced qN and NPQ in sunflower.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- saline stresse0
- Outcome
- co-efficient of nonphotochemical quenching (qN) and non-photochemical quenching (NPQ)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saline stress significantly reduced shoot and root fresh weights and their lengths, net CO2 assimilation rate (A), transpiration rate (E), water use efficiency (WUE), co-efficient of nonphotochemical quenching (qN) and non-photochemical quenching (NPQ)”
t0“SUNFLOWER”
Claim · model-written summary
Foliar TRIA increased sunflower shoot and root fresh weights and lengths in saline and nonsaline regimes.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- Foliar-applied TRIAe0
- Outcome
- shoot and root fresh weights and lengthse0
- Direction
- increasede0
- Qualifier
- both saline and non-saline regimese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar-applied TRIA markedly increased shoot and root fresh weights and lengths, A, E, stomatal conductance and WUE in both cultivars under both saline and non-saline regimes”
t0“SUNFLOWER”
Claim · model-written summary
Foliar TRIA increased A, E, and stomatal conductance in both sunflower cultivars.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- Foliar-applied TRIAe0
- Outcome
- A, E, stomatal conductancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar-applied TRIA markedly increased shoot and root fresh weights and lengths, A, E, stomatal conductance and WUE in both cultivars under both saline and non-saline regimes”
t0“SUNFLOWER”
Claim · model-written summary
Foliar TRIA increased WUE in both sunflower cultivars.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- Foliar-applied TRIAe0
- Outcome
- WUEe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar-applied TRIA markedly increased shoot and root fresh weights and lengths, A, E, stomatal conductance and WUE in both cultivars under both saline and non-saline regimes”
t0“SUNFLOWER”
Claim · model-written summary
TRIA had no prominent effect on sunflower electron transport rate or photochemical quenching.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- TRIAe0
- Outcome
- electron transport rate and photochemical quenchinge0
- Direction
- did not show prominent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TRIA did not show prominent effect on chlorophyll fluorescence attributes such as electron transport rate and photochemical quenching of sunflower plants”
Claim · model-written summary
The 100 µM TRIA level performed better than other levels.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- TRIA level 100 µMe0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The TRIA level 100 µM was more effective as compared to the others”
t0“SUNFLOWER”
Claim · model-written summary
SMH-917 performed better than SMH-907 for measured attributes.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- SMH-917e0
- Outcome
- better performancee0
- Direction
- bettere0
- Comparator
- SMH-907e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower cultivar SMH-917 showed better performance than those of cv. SMH-907 in terms of different attributes measured in this study”
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See all 12 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.