Abstract
Drought stress occurring during the reproductive growth stage leads to considerable reductions in crop production and has become an important limiting factor for food security globally. In order to explore the possible role of drought priming (pre-exposure of the plants to mild drought stress) on the alleviation of a severe drought stress event later in development, wheat plants were subjected to single or double mild drought episodes (soil relative water content around 35-40%) before anthesis and/or to a severe drought stress event (soil relative water content around 20-25%) 15 d after anthesis. Here, single or double drought priming before anthesis resulted in higher grain yield than in non-primed plants under drought stress during grain filling. The photosynthesis rate and ascorbate peroxidase activity were higher while malondialdehyde content was lower in primed plants than in the non-primed plants under drought stress during grain filling. Proteins in flag leaves differently expressed by the priming and drought stress were mainly related to photosynthesis, stress defence, metabolism, molecular chaperone, and cell structure. Furthermore, the protein abundance of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) small subunit, Rubisco activase and ascorbate peroxidase were upregulated in primed plants compared with non-primed plants under drought stress during grain filling. In conclusion, the altered protein expression and upregulated activities of photosynthesis and ascorbate peroxidase in primed plants may indicate their potential roles in alleviating a later-occurring drought stress episode, thereby contributing to higher wheat grain yield under drought stress during grain filling.
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Claims 8
Claim · model-written summary
Single or double pre-anthesis drought priming raised grain yield under grain-filling drought.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- single or double drought priming before anthesise0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single or double drought priming before anthesis resulted in higher grain yield than in non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Primed wheat had higher photosynthesis rate under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Outcome
- photosynthesis ratee0
- Direction
- highere0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis rate and ascorbate peroxidase activity were higher while malondialdehyde content was lower in primed plants than in the non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Primed wheat had higher ascorbate peroxidase activity under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Gene
- ascorbate peroxidasee0
- Outcome
- ascorbate peroxidase activitye0
- Direction
- highere0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis rate and ascorbate peroxidase activity were higher while malondialdehyde content was lower in primed plants than in the non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Primed wheat had lower malondialdehyde content under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Outcome
- malondialdehyde contente0
- Direction
- lowere0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“malondialdehyde content was lower in primed plants than in the non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Priming and drought changed flag-leaf proteins chiefly related to photosynthesis, stress defence, metabolism, chaperones and cell structure.
- Taxon
- wheatTriticum aestivume1
- Organ / stage
- flag leavese0
- Outcome
- Proteinse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteins in flag leaves differently expressed by the priming and drought stress were mainly related to photosynthesis, stress defence, metabolism, molecular chaperone, and cell structure”
e1“wheat plants”
Claim · model-written summary
Primed wheat had upregulated Rubisco small-subunit protein abundance under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Gene
- Rubiscoe0
- Outcome
- protein abundancee0
- Direction
- upregulatede0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protein abundance of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) small subunit, Rubisco activase and ascorbate peroxidase were upregulated in primed plants compared with non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Primed wheat had upregulated Rubisco activase protein abundance under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Gene
- Rubisco activasee0
- Outcome
- protein abundancee0
- Direction
- upregulatede0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protein abundance of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) small subunit, Rubisco activase and ascorbate peroxidase were upregulated in primed plants compared with non-primed plants under drought stress during grain filling”
e1“wheat plants”
Claim · model-written summary
Primed wheat had upregulated ascorbate peroxidase protein abundance under grain-filling drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- primed plantse0
- Gene
- ascorbate peroxidasee0
- Outcome
- protein abundancee0
- Direction
- upregulatede0
- Comparator
- non-primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protein abundance of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) small subunit, Rubisco activase and ascorbate peroxidase were upregulated in primed plants compared with non-primed plants under drought stress during grain filling”
e1“wheat plants”
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