ArticleAnnals of botany2019
Genetic inhibition of flowering differs between juvenile and adult Citrus trees.
Article in Annals of botany, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Genetic regulations of citrus flowering: insights towards climatic factors and modern biotechnological approaches.Planta · 2025Review
- Transcriptomic Profiling of Buds Unveils Insights into Floral Initiation in Tea-Oil Tree (Plants (Basel, Switzerland) · 2025Article
- Cloning, Expression, and Bioinformatics Analysis of theBiology · 2025Article
- WRKY transcription factor MdWRKY71 regulates flowering time in apple.Plant molecular biology · 2025Article
- Phylogeny and expression patterns of ERF genes that are potential reproductive inducers in hybrid larch.BMC genomics · 2024Article
- The central role of stem cells in determining plant longevity variation.Plant communications · 2023Review
- Transcriptome Analysis Reveals Putative Induction of Floral Initiation by Old Leaves in Tea-Oil Tree (International journal of molecular sciences · 2022Article
- Advances in Citrus Flowering: A Review.Frontiers in plant science · 2022Review
- De novo sequencing of the transcriptome reveals regulators of the floral transition in Fargesia macclureana (Poaceae).BMC genomics · 2019Article
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8 authors.
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No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsIn woody species, the juvenile period maintains the axillary meristems in a vegetative stage, unable to flower, for several years. However, in adult trees, some 1-year-old meristems flower whereas others remain vegetative to ensure a polycarpic growth habit. Both types of trees, therefore, have non-flowering meristems, and we hypothesize that the molecular mechanism regulating flower inhibition in juvenile trees is different from that in adult trees.
methodsIn adult Citrus trees, the main endogenous factor inhibiting flower induction is the growing fruit. Thus, we studied the expression of the main flowering time, identity and patterning genes of trees with heavy fruit load (not-flowering adult trees) compared to that of 6-month-old trees (not-flowering juvenile trees). Adult trees without fruits (flowering trees) were used as a control. Second, we studied the expression of the same genes in the meristems of 6-month, and 1-, 3-, 5- and 7-year-old juvenile trees compared to 10-year-old flowering trees. KEY
resultsThe axillary meristems of juvenile trees are unable to transcribe flowering time and patterning genes during the period of induction, although they are able to transcribe the FLOWERING LOCUS T citrus orthologue (CiFT2) in leaves. By contrast, meristems of not-flowering adult trees are able to transcribe the flowering network genes but fail to achieve the transcription threshold required to flower, due to CiFT2 repression by the fruit. Juvenile meristems progressively achieve gene expression, with age-dependent differences from 6 months to 7 years, FD-like and CsLFY being the last genes to be expressed.
conclusionsDuring the juvenile period the mechanism inhibiting flowering is determined in the immature bud, so that it progressively acquires flowering ability at the gene expression level of the flowering time programme, whereas in the adult tree it is determined in the leaf, where repression of CiFT2 gene expression occurs.
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