Source 1primary paper2026MED
Toolkit/constitutive SsDHN overexpression in transgenic tobacco
constitutive SsDHN overexpression in transgenic tobacco
Also known as: SsDHN-OE, transgenic tobacco lines with constitutive SsDHN expression
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
In the present study, transgenic tobacco lines with constitutive SsDHN expression (SsDHN-OE) were employed to examine its influence on seedling development under water-limited conditions.
Usefulness & Problems
Why this is useful
This construct pattern expresses the Suaeda salsa SsDHN gene constitutively in transgenic tobacco. In the abstract, SsDHN-OE lines are used to test whether SsDHN improves drought tolerance under water-limited conditions.; testing whether heterologous SsDHN expression improves drought tolerance in plants; engineering drought-stress resilience phenotypes in tobacco seedlings
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This construct pattern expresses the Suaeda salsa SsDHN gene constitutively in transgenic tobacco. In the abstract, SsDHN-OE lines are used to test whether SsDHN improves drought tolerance under water-limited conditions.
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testing whether heterologous SsDHN expression improves drought tolerance in plants
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engineering drought-stress resilience phenotypes in tobacco seedlings
Problem solved
It provides a heterologous plant system for evaluating whether SsDHN acts as a positive regulator of drought resilience. The reported phenotypes suggest it can improve growth and stress protection during water limitation.; provides a transgenic system to assess SsDHN-mediated drought protection in a plant host
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It provides a heterologous plant system for evaluating whether SsDHN acts as a positive regulator of drought resilience. The reported phenotypes suggest it can improve growth and stress protection during water limitation.
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provides a transgenic system to assess SsDHN-mediated drought protection in a plant host
Problem links
provides a transgenic system to assess SsDHN-mediated drought protection in a plant host
LiteratureIt provides a heterologous plant system for evaluating whether SsDHN acts as a positive regulator of drought resilience. The reported phenotypes suggest it can improve growth and stress protection during water limitation.
Source:
It provides a heterologous plant system for evaluating whether SsDHN acts as a positive regulator of drought resilience. The reported phenotypes suggest it can improve growth and stress protection during water limitation.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Mechanisms
aba-associated drought response regulationconstitutive heterologous gene overexpressionDegradationstomatal regulation associationstress-protective antioxidant response associationTechniques
Structural CharacterizationTarget processes
degradationrecombinationInput: Light
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: spectral hardware requirementoperating role: sensor
The study requires transgenic tobacco lines carrying constitutive SsDHN expression and drought-stress assays in seedlings. The abstract also indicates physiological, biochemical, and transcript readouts were measured under stress.; requires generation of transgenic tobacco lines with constitutive SsDHN expression; requires drought-stress phenotyping in water-limited conditions
The abstract does not show that this system is validated in crop species, field conditions, or non-drought stress contexts within this paper. It also does not establish the exact molecular mechanism of SsDHN action.; evidence in the abstract is limited to transgenic tobacco seedlings under drought stress; the abstract does not describe construct design details, promoter identity, or transferability to crops
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Constitutive SsDHN expression in transgenic tobacco enhances drought tolerance under water-limited conditions.
Results indicated that constitutive SsDHN expression enhanced biomass accumulation, foliar expansion, root elongation, and root surface dimensions in water-stressed seedlings.
SsDHN-OE tobacco lines under drought stress show increased transcript abundance of NtNCED3, NtSnRK2.2, NtRD26, NtLEA5, NtPOD, NtSOD, NtCAT, and NtAPX1.
Furthermore, transcript abundance of stress-responsive genes-encompassing NtNCED3, NtSnRK2.2, NtRD26, NtLEA5, NtPOD, NtSOD, NtCAT, and NtAPX1-was markedly increased in SsDHN-OE lines experiencing drought stress.
SsDHN overexpression in drought-stressed tobacco is associated with increased proline and ABA accumulation, increased antioxidant enzyme activity, and intensified stomatal regulation.
Moreover, transformed lines demonstrated elevated proline (Pro) accumulation and abscisic acid (ABA) content, augmented antioxidant enzyme activity, and intensified stomatal regulation under stress conditions.
SsDHN overexpression reduces photoinhibition, chloroplast structural degradation, MDA accumulation, electrolyte leakage, hydrogen peroxide, and superoxide under drought stress in tobacco.
Conversely, photoinhibition intensity, chloroplast structural degradation, malondialdehyde (MDA) accumulation, electrolyte leakage, hydrogen peroxide (H2O2), and superoxide radical (O2-) concentrations were diminished.
Approval Evidence
1 source4 linked approval claimsfirst-pass slug constitutive-ssdhn-overexpression-in-transgenic-tobacco
In the present study, transgenic tobacco lines with constitutive SsDHN expression (SsDHN-OE) were employed to examine its influence on seedling development under water-limited conditions.
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functional effectsupports
Constitutive SsDHN expression in transgenic tobacco enhances drought tolerance under water-limited conditions.
Results indicated that constitutive SsDHN expression enhanced biomass accumulation, foliar expansion, root elongation, and root surface dimensions in water-stressed seedlings.
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gene expression changesupports
SsDHN-OE tobacco lines under drought stress show increased transcript abundance of NtNCED3, NtSnRK2.2, NtRD26, NtLEA5, NtPOD, NtSOD, NtCAT, and NtAPX1.
Furthermore, transcript abundance of stress-responsive genes-encompassing NtNCED3, NtSnRK2.2, NtRD26, NtLEA5, NtPOD, NtSOD, NtCAT, and NtAPX1-was markedly increased in SsDHN-OE lines experiencing drought stress.
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mechanistic associationsupports
SsDHN overexpression in drought-stressed tobacco is associated with increased proline and ABA accumulation, increased antioxidant enzyme activity, and intensified stomatal regulation.
Moreover, transformed lines demonstrated elevated proline (Pro) accumulation and abscisic acid (ABA) content, augmented antioxidant enzyme activity, and intensified stomatal regulation under stress conditions.
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stress protectionsupports
SsDHN overexpression reduces photoinhibition, chloroplast structural degradation, MDA accumulation, electrolyte leakage, hydrogen peroxide, and superoxide under drought stress in tobacco.
Conversely, photoinhibition intensity, chloroplast structural degradation, malondialdehyde (MDA) accumulation, electrolyte leakage, hydrogen peroxide (H2O2), and superoxide radical (O2-) concentrations were diminished.
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Comparisons
Source-stated alternatives
The abstract frames dehydrins as a broader stress-adaptation protein family, implying other DHN genes are alternative stress-tolerance candidates. No direct comparator construct is tested in the provided source text.
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The abstract frames dehydrins as a broader stress-adaptation protein family, implying other DHN genes are alternative stress-tolerance candidates. No direct comparator construct is tested in the provided source text.
Source-backed strengths
associated with improved growth and stress-response traits under water-limited conditions; associated with reduced oxidative and membrane-damage indicators under drought stress
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associated with improved growth and stress-response traits under water-limited conditions
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associated with reduced oxidative and membrane-damage indicators under drought stress
Compared with lyso-ArchT
constitutive SsDHN overexpression in transgenic tobacco and lyso-ArchT address a similar problem space because they share degradation.
Shared frame: same top-level item type; shared target processes: degradation; shared mechanisms: degradation; same primary input modality: light
Compared with lyso-ChR2
constitutive SsDHN overexpression in transgenic tobacco and lyso-ChR2 address a similar problem space because they share degradation.
Shared frame: same top-level item type; shared target processes: degradation; shared mechanisms: degradation; same primary input modality: light
Compared with PCB synthesis expression vector
constitutive SsDHN overexpression in transgenic tobacco and PCB synthesis expression vector address a similar problem space because they share degradation, recombination.
Shared frame: same top-level item type; shared target processes: degradation, recombination; shared mechanisms: degradation; same primary input modality: light
Strengths here: looks easier to implement in practice; may avoid an exogenous cofactor requirement.
Ranked Citations
- 1.