Abstract
SUMMARY Identification of new effective strategies for improving crop yields under environmental stresses such as drought represent key priorities for researchers around the globe. In the present study, the effects of different methods of exogenous selenium (Se) supply viz. Se seed priming, Se fertigation and Se foliar spray on yield of spring wheat under normal and water deficit conditions were investigated. Two field experiments were conducted using one indigenous drought-tolerant genotype (Kohistan-97) and a sensitive genotype (Pasban-90) to understand the role of Se in improving wheat yield. The experiments were laid out in a split-split plot design with three replications during consecutive years (2011/12 and 2012/13) and the plants were exposed to water stress by withholding irrigation at two different wheat growth stages, viz. tillering and anthesis. It was noted that drought stress significantly affected the yield attributes of wheat; however, exogenous Se supply was observed to be helpful in improving the drought tolerance potential and yield of water-stressed wheat plants through maintenance of plant water status. A significant increase in wheat yield by Se supply was also noted under normal conditions. The normal plants fertigated with Se maintained the highest values for number of productive tillers, spike length, number of grains per spike, thousand-grain weight, biological and grain yield with no significant difference from Se foliar spray at the tillering stage, which was found to be the most effective method of exogenous Se supply for improving wheat yield under water deficit conditions. Moreover, Se fertigation and foliar spray resulted in the maximum accumulation of Se in shoots and gave the highest net return and cost-benefit ratio under drought stress conditions. The present study is one of the few reports on the role of Se in alleviating water stress for obtaining maximum profit in field grown spring wheat.
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Claims 10
Claim · model-written summary
Drought significantly affected wheat yield attributes.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- drought stresse0
- Outcome
- yield attributese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress significantly affected the yield attributes of wheat”
Claim · model-written summary
Exogenous selenium improved drought tolerance and yield in water stressed wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous Se supplye0
- Outcome
- drought tolerance potential and yielde0
- Direction
- improvinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous Se supply was observed to be helpful in improving the drought tolerance potential and yield of water-stressed wheat plants through maintenance of plant water status.”
Claim · model-written summary
Selenium improved plant water status under water stress.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous Se supplye0
- Outcome
- plant water statuse0
- Direction
- maintenancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous Se supply was observed to be helpful in improving the drought tolerance potential and yield of water-stressed wheat plants through maintenance of plant water status.”
Claim · model-written summary
Selenium significantly increased wheat yield under normal conditions.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Se supplye0
- Outcome
- wheat yielde0
- Direction
- increasee0
- Qualifier
- normal conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant increase in wheat yield by Se supply was also noted under normal conditions.”
Claim · model-written summary
Selenium fertigation in normal plants produced the highest productive tiller number, spike length and grains per spike.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- fertigated with See0
- Outcome
- number of productive tillers, spike length, number of grains per spikee0
- Direction
- higheste0
- Comparator
- Se foliar spray at the tillering stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The normal plants fertigated with Se maintained the highest values for number of productive tillers, spike length, number of grains per spike, thousand-grain weight, biological and grain yield with no significant difference from Se foliar spray at the tillering stage, which was found to be the most effective method of exogenous Se supply for improving wheat yield under water deficit conditions.”
t0“spring wheat”
Claim · model-written summary
Selenium fertigation in normal plants produced the highest thousand grain weight and biological and grain yield.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- fertigated with See0
- Outcome
- thousand-grain weight, biological and grain yielde0
- Direction
- higheste0
- Comparator
- Se foliar spray at the tillering stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The normal plants fertigated with Se maintained the highest values for number of productive tillers, spike length, number of grains per spike, thousand-grain weight, biological and grain yield with no significant difference from Se foliar spray at the tillering stage, which was found to be the most effective method of exogenous Se supply for improving wheat yield under water deficit conditions.”
t0“spring wheat”
Claim · model-written summary
Fertigation and foliar spray did not significantly differ for the measured yield traits.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Se foliar spray at the tillering stagee0
- Outcome
- no significant differencee0
- Direction
- no significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with no significant difference from Se foliar spray at the tillering stage”
t0“spring wheat”
Claim · model-written summary
Foliar selenium spray at tillering was judged the most effective supply method for yield under water deficit.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Se foliar spray at the tillering stagee0
- Outcome
- wheat yielde0
- Direction
- improvinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se foliar spray at the tillering stage, which was found to be the most effective method of exogenous Se supply for improving wheat yield under water deficit conditions.”
Claim · model-written summary
Fertigation and foliar spray yielded maximum shoot selenium accumulation under drought.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Se fertigation and foliar spraye0
- Outcome
- accumulation of Se in shootse0
- Direction
- maximume0
- Qualifier
- drought stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se fertigation and foliar spray resulted in the maximum accumulation of Se in shoots and gave the highest net return and cost-benefit ratio under drought stress conditions.”
t0“spring wheat”
Claim · model-written summary
Fertigation and foliar spray gave the highest net return and cost benefit ratio under drought.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Se fertigation and foliar spraye0
- Outcome
- net return and cost-benefit ratioe0
- Direction
- higheste0
- Qualifier
- drought stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se fertigation and foliar spray resulted in the maximum accumulation of Se in shoots and gave the highest net return and cost-benefit ratio under drought stress conditions.”
t0“spring wheat”
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See all 877 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.