Abstract
The KNOX (KNOTTED1-like homeobox) transcription factors play an important role in leaf, shoot apical meristem and seed development and respond to biotic and abiotic stresses. In this study, we analyzed the diversity and evolutionary history of the KNOX gene family in the genome of tetraploid cotton ( Gossypium hirsutum ). Forty-four putative KNOX genes were identified. All KNOX genes from seven higher plant species were classified into KNOXI, KNOXII, and KNATM clades based on a phylogenetic analysis. Chromosomal localization and collinearity analysis suggested that whole-genome duplication and a polyploidization event contributed to the expansion of the cotton KNOX gene family. Analyses of expression profiles revealed that the GhKNOX genes likely responded to diverse stresses and were involved in cotton growth developmental processes. Silencing of GhKNOX2 enhanced the salt tolerance of cotton seedlings, whereas silencing of GhKNOX10 and GhKNOX14 reduced seedling tolerance to salt stress. Silencing of GhSTM3 influenced the cotton flowering time and plant development. These findings clarify the evolution of the cotton KNOX gene family and provide a foundation for future functional studies of KNOX proteins in cotton growth and development and response to abiotic stresses.
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Claims 9
Claim · model-written summary
Forty-four putative KNOX genes were identified in the cotton genome
- Taxon
- Gossypium hirsutum
Gossypium hirsutumt0 - Gene
- KNOXe1
- Outcome
- putative KNOX genese1
- Value
- Forty-foure1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e1“Forty-four putative KNOX genes were identified”
Claim · model-written summary
KNOX genes from seven higher plant species were classified into KNOXI, KNOXII and KNATM clades
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Gene
- KNOXe2
- Outcome
- classified into KNOXI, KNOXII, and KNATM cladese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e2“All KNOX genes from seven higher plant species were classified into KNOXI, KNOXII, and KNATM clades”
Claim · model-written summary
Whole-genome duplication and a polyploidization event contributed to the expansion of the cotton KNOX gene family
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- expansion of the cotton KNOX gene familye3
- Qualifier
- whole-genome duplication and a polyploidization evente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e3“Chromosomal localization and collinearity analysis suggested that whole-genome duplication and a polyploidization event contributed to the expansion of the cotton KNOX gene family”
Claim · model-written summary
GhKNOX genes were expressed in response to diverse stresses
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- diverse stressese4
- Gene
- GhKNOX genese4
- Outcome
- expression profilese4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e4“Analyses of expression profiles revealed that the GhKNOX genes likely responded to diverse stresses”
Claim · model-written summary
GhKNOX genes are involved in cotton growth and developmental processes
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Gene
- GhKNOX genese4
- Outcome
- cotton growth developmental processese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e4“Analyses of expression profiles revealed that the GhKNOX genes likely responded to diverse stresses”
e5“were involved in cotton growth developmental processes”
Claim · model-written summary
Silencing of GhKNOX2 enhanced salt tolerance of cotton seedlings
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Organ / stage
- seedlingse6
- Treatment
- Silencing of GhKNOX2e6
- Gene
- GhKNOX2e6
- Outcome
- salt tolerance of cotton seedlingse6
- Direction
- enhancede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e6“Silencing of GhKNOX2 enhanced the salt tolerance of cotton seedlings”
Claim · model-written summary
Silencing of GhKNOX10 reduced seedling tolerance to salt stress
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- silencing of GhKNOX10e7
- Gene
- GhKNOX10e7
- Outcome
- seedling tolerance to salt stresse7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e7“silencing of GhKNOX10 and GhKNOX14 reduced seedling tolerance to salt stress”
Claim · model-written summary
Silencing of GhKNOX14 reduced seedling tolerance to salt stress
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- GhKNOX14e7
- Gene
- GhKNOX14e7
- Outcome
- seedling tolerance to salt stresse7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e7“silencing of GhKNOX10 and GhKNOX14 reduced seedling tolerance to salt stress”
Claim · model-written summary
Silencing of GhSTM3 influenced cotton flowering time and plant development
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- Silencing of GhSTM3e7
- Gene
- GhSTM3e7
- Outcome
- flowering time and plant developmente7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium hirsutum L.)”
e7“Silencing of GhSTM3 influenced the cotton flowering time and plant development”
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