Role of GhHDA5 in H3K9 deacetylation and fiber initiation in Gossypium hirsutum

Verandra Kumar, Babita Singh, Sunil K Singh, Krishan M Rai, Surendra P Singh, Anshulika Sable, Poonam Pant, Gauri Saxena, Samir V Sawant

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cotton fibers are single-celled trichomes that initiate from the epidermal cells of the ovules at or before anthesis. Here, we identified that the histone deacetylase (HDAC) activity is essential for proper cotton fiber initiation. We further identified 15 HDACs homoeologs in each of the A- and D-subgenomes of Gossypium hirsutum. Few of these HDAC homoeologs expressed preferentially during the early stages of fiber development [-1, 0 and 6 days post-anthesis (DPA)]. Among them, GhHDA5 expressed significantly at the time of fiber initiation (-1 and 0 DPA). The in vitro assay for HDAC activity indicated that GhHDA5 primarily deacetylates H3K9 acetylation marks. Moreover, the reduced expression of GhHDA5 also suppresses fiber initiation and lint yield in the RNA interference (RNAi) lines. The 0 DPA ovules of GhHDA5RNAi lines also showed alterations in reactive oxygen species homeostasis and elevated autophagic cell death in the developing fibers. The differentially expressed genes (DEGs) identified through RNA-seq of RNAi line (DEP12) and their pathway analysis showed that GhHDA5 modulates expression of many stress and development-related genes involved in fiber development. The reduced expression of GhHDA5 in the RNAi lines also resulted in H3K9 hyper-acetylation on the promoter region of few DEGs assessed by chromatin immunoprecipitation assay. The positively co-expressed genes with GhHDA5 showed cumulative higher expression during fiber initiation, and gene ontology annotation suggests their involvement in fiber development. Furthermore, the predicted protein interaction network in the positively co-expressed genes indicates HDA5 modulates fiber initiation-specific gene expression through a complex involving reported repressors.

Original languageEnglish (US)
Pages (from-to)1069-1083
Number of pages15
JournalThe Plant journal : for cell and molecular biology
Volume95
Issue number6
DOIs
StatePublished - Sep 2018

Fingerprint

Gossypium
Gossypium hirsutum
Histone Deacetylases
histone deacetylase
RNA Interference
Cotton Fiber
Ovule
RNA interference
Genes
flowering
Acetylation
genes
lint cotton
acetylation
ovules
Trichomes
Protein Interaction Maps
Molecular Sequence Annotation
Gene Ontology
Chromatin Immunoprecipitation

Bibliographical note

© 2018 The Authors The Plant Journal © 2018 John Wiley & Sons Ltd.

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

Cite this

Role of GhHDA5 in H3K9 deacetylation and fiber initiation in Gossypium hirsutum. / Kumar, Verandra; Singh, Babita; Singh, Sunil K; Rai, Krishan M; Singh, Surendra P; Sable, Anshulika; Pant, Poonam; Saxena, Gauri; Sawant, Samir V.

In: The Plant journal : for cell and molecular biology, Vol. 95, No. 6, 09.2018, p. 1069-1083.

Research output: Contribution to journalArticle

Kumar, V, Singh, B, Singh, SK, Rai, KM, Singh, SP, Sable, A, Pant, P, Saxena, G & Sawant, SV 2018, 'Role of GhHDA5 in H3K9 deacetylation and fiber initiation in Gossypium hirsutum', The Plant journal : for cell and molecular biology, vol. 95, no. 6, pp. 1069-1083. https://doi.org/10.1111/tpj.14011
Kumar, Verandra ; Singh, Babita ; Singh, Sunil K ; Rai, Krishan M ; Singh, Surendra P ; Sable, Anshulika ; Pant, Poonam ; Saxena, Gauri ; Sawant, Samir V. / Role of GhHDA5 in H3K9 deacetylation and fiber initiation in Gossypium hirsutum. In: The Plant journal : for cell and molecular biology. 2018 ; Vol. 95, No. 6. pp. 1069-1083.
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AU - Singh, Babita

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AU - Rai, Krishan M

AU - Singh, Surendra P

AU - Sable, Anshulika

AU - Pant, Poonam

AU - Saxena, Gauri

AU - Sawant, Samir V

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N2 - Cotton fibers are single-celled trichomes that initiate from the epidermal cells of the ovules at or before anthesis. Here, we identified that the histone deacetylase (HDAC) activity is essential for proper cotton fiber initiation. We further identified 15 HDACs homoeologs in each of the A- and D-subgenomes of Gossypium hirsutum. Few of these HDAC homoeologs expressed preferentially during the early stages of fiber development [-1, 0 and 6 days post-anthesis (DPA)]. Among them, GhHDA5 expressed significantly at the time of fiber initiation (-1 and 0 DPA). The in vitro assay for HDAC activity indicated that GhHDA5 primarily deacetylates H3K9 acetylation marks. Moreover, the reduced expression of GhHDA5 also suppresses fiber initiation and lint yield in the RNA interference (RNAi) lines. The 0 DPA ovules of GhHDA5RNAi lines also showed alterations in reactive oxygen species homeostasis and elevated autophagic cell death in the developing fibers. The differentially expressed genes (DEGs) identified through RNA-seq of RNAi line (DEP12) and their pathway analysis showed that GhHDA5 modulates expression of many stress and development-related genes involved in fiber development. The reduced expression of GhHDA5 in the RNAi lines also resulted in H3K9 hyper-acetylation on the promoter region of few DEGs assessed by chromatin immunoprecipitation assay. The positively co-expressed genes with GhHDA5 showed cumulative higher expression during fiber initiation, and gene ontology annotation suggests their involvement in fiber development. Furthermore, the predicted protein interaction network in the positively co-expressed genes indicates HDA5 modulates fiber initiation-specific gene expression through a complex involving reported repressors.

AB - Cotton fibers are single-celled trichomes that initiate from the epidermal cells of the ovules at or before anthesis. Here, we identified that the histone deacetylase (HDAC) activity is essential for proper cotton fiber initiation. We further identified 15 HDACs homoeologs in each of the A- and D-subgenomes of Gossypium hirsutum. Few of these HDAC homoeologs expressed preferentially during the early stages of fiber development [-1, 0 and 6 days post-anthesis (DPA)]. Among them, GhHDA5 expressed significantly at the time of fiber initiation (-1 and 0 DPA). The in vitro assay for HDAC activity indicated that GhHDA5 primarily deacetylates H3K9 acetylation marks. Moreover, the reduced expression of GhHDA5 also suppresses fiber initiation and lint yield in the RNA interference (RNAi) lines. The 0 DPA ovules of GhHDA5RNAi lines also showed alterations in reactive oxygen species homeostasis and elevated autophagic cell death in the developing fibers. The differentially expressed genes (DEGs) identified through RNA-seq of RNAi line (DEP12) and their pathway analysis showed that GhHDA5 modulates expression of many stress and development-related genes involved in fiber development. The reduced expression of GhHDA5 in the RNAi lines also resulted in H3K9 hyper-acetylation on the promoter region of few DEGs assessed by chromatin immunoprecipitation assay. The positively co-expressed genes with GhHDA5 showed cumulative higher expression during fiber initiation, and gene ontology annotation suggests their involvement in fiber development. Furthermore, the predicted protein interaction network in the positively co-expressed genes indicates HDA5 modulates fiber initiation-specific gene expression through a complex involving reported repressors.

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