Abstract
Drought tolerance is a complex trait that involves different biochemical and physiological mechanisms in plants. It was the objective of the present study to evaluate the agronomic and biochemical responses of triticale, tritipyrum, and wheat to drought stress. For this purpose, twenty-seven genotypes were evaluated under two levels (non-stress and drought stress) of irrigation during 2015‒2017. The metabolic traits studied included relative water content (RWC), membrane stability index (MSI), chlorophyll a (Chla), chlorophyll b (Chlb), carotenoids (Car), leaf proline content (Pro), leaf soluble carbohydrates (LSC), glycine betaine (GB), malondialdehyde (MDA), hydrogen peroxide (H2O2), seeds per spike (SS), seed weight (SW), biological yield (BY) and seed yield (SY). Drought stress increased Pro, LSC, and GB contents as well as lipid peroxidation through increasing MDA and H2O2 activities. However, both RWC and MSI indices as well as SS, SW, SY and BY reduced as a result of drought treatment although the least decrease of SY was observed at triticale group. During the two years of study, the tritipyrum genotypes exhibited their drought tolerance by accumulation of more LSC and GB as well as lower decrease in SW while the triticale ones responded by maintaining higher levels of RWC but producing less MDA and H2O2. It may, therefore, be concluded that the three species studied exploit different mechanisms to maintain tolerance against drought stress. Finally, correlation analysis indicated the positive effects of LSC on SY under both drought and normal conditions, which is obviously a promising trait in wheat, triticale, and tritipyrum that can be beneficially exploited in drought tolerance improvement programs.
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Claims 11
Claim · model-written summary
Drought increased Pro, LSC and GB contents.
- Taxon
- Triticale
×Triticosecalet0 - Treatment
- Drought stresse0
- Outcome
- Pro, LSC, and GB contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress increased Pro, LSC, and GB contents as well as lipid peroxidation through increasing MDA and H2O2 activities.”
t0“Trititicum aestivum, Triticale, and Tritipyrum”
Claim · model-written summary
Drought increased lipid peroxidation through MDA and H2O2 activities.
- Taxon
- Triticale×Triticosecalet0
- Treatment
- Drought stresse0
- Outcome
- lipid peroxidatione0
- Qualifier
- increasing MDA and H2O2 activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress increased Pro, LSC, and GB contents as well as lipid peroxidation through increasing MDA and H2O2 activities.”
t0“Trititicum aestivum, Triticale, and Tritipyrum”
Claim · model-written summary
Drought reduced RWC and MSI indices.
- Taxon
- Triticale×Triticosecalet0
- Treatment
- drought treatmente0
- Outcome
- RWC and MSI indicese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, both RWC and MSI indices as well as SS, SW, SY and BY reduced as a result of drought treatment although the least decrease of SY was observed at triticale group.”
t0“Trititicum aestivum, Triticale, and Tritipyrum”
Claim · model-written summary
Drought reduced SS, SW and SY.
- Taxon
- Triticale×Triticosecalet0
- Treatment
- drought treatmente0
- Outcome
- SS, SW, SYe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, both RWC and MSI indices as well as SS, SW, SY and BY reduced as a result of drought treatment although the least decrease of SY was observed at triticale group.”
t0“Trititicum aestivum, Triticale, and Tritipyrum”
Claim · model-written summary
Drought reduced biological yield.
- Taxon
- Triticale×Triticosecalet0
- Treatment
- drought treatmente0
- Outcome
- BYe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, both RWC and MSI indices as well as SS, SW, SY and BY reduced as a result of drought treatment although the least decrease of SY was observed at triticale group.”
t0“Trititicum aestivum, Triticale, and Tritipyrum”
Claim · model-written summary
The triticale group had the least decrease in seed yield.
- Taxon
- triticale×Triticosecalee0
- Outcome
- SYe0
- Direction
- least decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, both RWC and MSI indices as well as SS, SW, SY and BY reduced as a result of drought treatment although the least decrease of SY was observed at triticale group.”
Claim · model-written summary
Tritipyrum genotypes accumulated more LSC and GB during drought.
Verbatim
e0“During the two years of study, the tritipyrum genotypes exhibited their drought tolerance by accumulation of more LSC and GB as well as lower decrease in SW while the triticale ones responded by maintaining higher levels of RWC but producing less MDA and H2O2.”
Claim · model-written summary
Tritipyrum genotypes had a lower decrease in seed weight.
Verbatim
e0“During the two years of study, the tritipyrum genotypes exhibited their drought tolerance by accumulation of more LSC and GB as well as lower decrease in SW while the triticale ones responded by maintaining higher levels of RWC but producing less MDA and H2O2.”
Claim · model-written summary
Triticale maintained higher RWC levels.
- Taxon
- triticale×Triticosecalee0
- Outcome
- RWCe0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the two years of study, the tritipyrum genotypes exhibited their drought tolerance by accumulation of more LSC and GB as well as lower decrease in SW while the triticale ones responded by maintaining higher levels of RWC but producing less MDA and H2O2.”
Claim · model-written summary
Triticale produced less MDA and H2O2.
- Taxon
- triticale×Triticosecalee0
- Outcome
- MDA and H2O2e0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the two years of study, the tritipyrum genotypes exhibited their drought tolerance by accumulation of more LSC and GB as well as lower decrease in SW while the triticale ones responded by maintaining higher levels of RWC but producing less MDA and H2O2.”
Claim · model-written summary
LSC was positively associated with seed yield under drought and normal conditions.
- Taxon
- wheat
Triticum aestivume0 - Compound
- LSCe0
- Outcome
- SYe0
- Direction
- positivee0
- Qualifier
- under both drought and normal conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Finally, correlation analysis indicated the positive effects of LSC on SY under both drought and normal conditions, which is obviously a promising trait in wheat, triticale, and tritipyrum that can be beneficially exploited in drought tolerance improvement programs.”
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See all 14 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.