Abstract
Fine-tuned and coordinated regulation of transport, metabolism and redox homeostasis allows plants to acclimate to osmotic and ionic stress caused by high salinity. Sugar beet is a highly salt tolerant crop plant and is therefore an interesting model to study sodium chloride (NaCl) acclimation in crops. Sugar beet plants were subjected to a final level of 300 mM NaCl for up to 14 d in hydroponics. Plants acclimated to NaCl stress by maintaining its growth rate and adjusting its cellular redox and reactive oxygen species (ROS) network. In order to understand the unusual suppression of ROS accumulation under severe salinity, the regulation of elements of the redox and ROS network was investigated at the transcript level. First, the gene families of superoxide dismutase (SOD), peroxiredoxins (Prx), alternative oxidase (AOX), plastid terminal oxidase (PTOX) and NADPH oxidase (RBOH) were identified in the sugar beet genome. Salinity induced the accumulation of Cu-Zn-SOD, Mn-SOD, Fe-SOD3, all AOX isoforms, 2-Cys-PrxB, PrxQ, and PrxIIF. In contrast, Fe-SOD1, 1-Cys-Prx, PrxIIB and PrxIIE levels decreased in response to salinity. Most importantly, RBOH transcripts of all isoforms decreased. This pattern offers a straightforward explanation for the low ROS levels under salinity. Promoters of stress responsive antioxidant genes were analyzed in silico for the enrichment of cis-elements, in order to gain insights into gene regulation. The results indicate that special cis-elements in the promoters of the antioxidant genes in sugar beet participate in adjusting the redox and ROS network and are fundamental to high salinity tolerance of sugar beet.
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Claims 10
Claim · model-written summary
Sugar beet maintained growth rate under NaCl stress.
- Taxon
- Sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- 300 mM NaCle0
- Outcome
- growth ratee0
- Direction
- maintaininge0
- Setting
- hydroponicse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were subjected to a final level of 300 mM NaCl for up to 14 d in hydroponics. Plants acclimated to NaCl stress by maintaining its growth rate”
Claim · model-written summary
Sugar beet adjusted its cellular redox and ROS network under NaCl stress.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- 300 mM NaCle0
- Outcome
- cellular redox and reactive oxygen species (ROS) networke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were subjected to a final level of 300 mM NaCl for up to 14 d in hydroponics. Plants acclimated to NaCl stress by maintaining its growth rate and adjusting its cellular redox and reactive oxygen species (ROS) network”
Claim · model-written summary
SOD, Prx, AOX, PTOX and RBOH gene families were identified in the sugar beet genome.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Gene
- superoxide dismutase (SOD), peroxiredoxins (Prx), alternative oxidase (AOX), plastid terminal oxidase (PTOX) and NADPH oxidase (RBOH)e0
- Outcome
- gene familiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene families of superoxide dismutase (SOD), peroxiredoxins (Prx), alternative oxidase (AOX), plastid terminal oxidase (PTOX) and NADPH oxidase (RBOH) were identified in the sugar beet genome”
Claim · model-written summary
Salinity increased Cu-Zn-SOD, Mn-SOD and Fe-SOD3 abundance.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Salinitye0
- Outcome
- accumulation of Cu-Zn-SOD, Mn-SOD, Fe-SOD3e0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity induced the accumulation of Cu-Zn-SOD, Mn-SOD, Fe-SOD3”
t0“Sugar Beet”
Claim · model-written summary
Salinity increased accumulation of all AOX isoforms.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Salinitye0
- Outcome
- all AOX isoformse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity induced the accumulation of Cu-Zn-SOD, Mn-SOD, Fe-SOD3, all AOX isoforms”
t0“Sugar Beet”
Claim · model-written summary
Salinity increased accumulation of 2-Cys-PrxB, PrxQ and PrxIIF.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Salinitye0
- Outcome
- 2-Cys-PrxB, PrxQ, and PrxIIFe0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity induced the accumulation of Cu-Zn-SOD, Mn-SOD, Fe-SOD3, all AOX isoforms, 2-Cys-PrxB, PrxQ, and PrxIIF”
t0“Sugar Beet”
Claim · model-written summary
Fe-SOD1, 1-Cys-Prx and PrxIIB levels decreased under salinity.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salinitye0
- Outcome
- Fe-SOD1, 1-Cys-Prx, PrxIIBe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fe-SOD1, 1-Cys-Prx, PrxIIB and PrxIIE levels decreased in response to salinity”
t0“Sugar Beet”
Claim · model-written summary
PrxIIE levels decreased under salinity.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salinitye0
- Outcome
- PrxIIE levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fe-SOD1, 1-Cys-Prx, PrxIIB and PrxIIE levels decreased in response to salinity”
t0“Sugar Beet”
Claim · model-written summary
All RBOH transcript isoforms decreased under salinity.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- RBOH transcripts of all isoformse0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RBOH transcripts of all isoforms decreased”
t0“Sugar Beet”
Claim · model-written summary
Special antioxidant gene promoter cis-elements were implicated in redox and ROS adjustment and high salinity tolerance.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Gene
- antioxidant genese0
- Outcome
- high salinity tolerancee0
- Qualifier
- special cis-elementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“special cis-elements in the promoters of the antioxidant genes in sugar beet participate in adjusting the redox and ROS network and are fundamental to high salinity tolerance of sugar beet”
The same questions in other papers
sodium chloride · growth · Beta vulgaris (beet)Results differ
9 papers in the same direction as this paper · 10 in the opposite direction
- positive
- no effect
- negative
16 papers more in this group
See all 20 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.