Abstract
In many areas of Iran, the reproductive growth stage of sunflower is exposed to the drought stress. Therefore, irrigation management of farms is necessary to increase irrigation efficiency and decreasing water loss. Zinc (Zn), is one of the necessary nutrient for plant growth to involve in formation of indole acetic acid and its foliar application is a known way and addition complementary to uptake by roots. This study was conducted to investigate the effect of zinc sulfate on some physiological traits in sunflower (Hellianthus.annuus L.) under drought stress. The experiment was split plot based on randomized complete block design with three replications. Four irrigation treatments, i.e. I1= without stress (control), I2= interrupt irrigation during the vegetative growth stage, I3= interrupt irrigation during the flowering stage, I4= interrupt irrigation during the vegetative and flowering stages were arranged as main plots and three foliar application treatments of zinc sulfate, i.e. Zn0= without foliar application, Zn1= 0.5%, Zn2= 1% concentration of zinc sulfate were arranged as sub plots. The results indicated that drought stress decreased significantly all the measured traits. Seed yield had a significant decrease. The treatment of full irrigation (Control) resulted in higher yields than other irrigation treatments. The highest seed yield was related to foliar application with 1% concentration of zinc sulfate and the lowest one was related to no irrigation during vegetative stage and flowering stage with no foliar application of Zn. Regarding the limitation of water resources, application of Zn could be used as a good strategy for yield sustainability of sunflower under drought stress. Key word: sunflower, drought stress, Zinc foliar application, relative water content (RWC), yield
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Claims 6
Claim · model-written summary
Drought stress significantly decreased all measured traits.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- drought stresse0
- Outcome
- all the measured traitse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that drought stress decreased significantly all the measured traits”
t0“Sunflower”
Claim · model-written summary
Drought stress significantly decreased seed yield.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- drought stresse0
- Outcome
- Seed yielde0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress decreased significantly all the measured traits. Seed yield had a significant decrease”
t0“Sunflower”
Claim · model-written summary
Full irrigation produced higher yield than other irrigation treatments.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- full irrigatione0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- other irrigation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment of full irrigation (Control) resulted in higher yields than other irrigation treatments”
t0“Sunflower”
Claim · model-written summary
Foliar application of 1% zinc sulfate gave the highest seed yield.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- foliar application with 1% concentration of zinc sulfatee0
- Outcome
- seed yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest seed yield was related to foliar application with 1% concentration of zinc sulfate”
t0“Sunflower”
Claim · model-written summary
No irrigation during vegetative and flowering stages without zinc produced the lowest seed yield.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- no irrigation during vegetative stage and flowering stage with no foliar application of Zne0
- Outcome
- lowest onee0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest one was related to no irrigation during vegetative stage and flowering stage with no foliar application of Zn”
t0“Sunflower”
Claim · model-written summary
The authors recommend zinc application for yield sustainability during drought.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- application of Zn could be used as a good strategy for yield sustainabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of Zn could be used as a good strategy for yield sustainability of sunflower under drought stress”
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