Identification of a gene involved in the juvenile-to-adult transition (JAT) in cultivated olive trees

Fernández-Ocaña, Ana; García-López, Mari Carmen; Jiménez-Ruiz, Jaime; Saniger, Luisa; Macías, David; Navarro, Francisco; Oya, Ricardo; Belaj, Angjelina; Rosa, Raúl de la; Corpas, Francisco J.; Barroso, Juan B.; Luque, Francisco

doi:10.1007/s11295-010-0299-5

Cited by 23 publications

(9 citation statements)

References 40 publications

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“…In studies of the molecular mechanisms of tree aging, many age-related genes have been identified (Busov et al 2004;Carlsbecker et al 2004;Diego et al 2004;Fernández-Ocaña et al 2010;García-López et al 2014;Hutchison et al 1990;Li et al 2010Xu et al 2016;Zhang et al 2016), such as miR156 (Wang et al 2011b) and Flowering Locus T (Böhlenius et al 2006;Hsu et al 2006Hsu et al , 2011, and some have been used to change the agronomic traits of plants (Flachowsky et al 2012;Kotoda et al 2006;Li et al 2013a;Yamagishi et al 2014). Larix kaempferi is a forest tree of important ecological and economic value, widely grown in the Northern Hemisphere, but its genome has not been sequenced.…”

Section: Communicated By F Gugerlimentioning

confidence: 99%

Transcriptome analysis provides insights into wood formation during larch tree aging

Yang

Zhang

et al. 2017

Tree Genetics & Genomes

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Tree age affects wood formation and yield. However, the underlying mechanisms are poorly understood, particularly at the molecular level. In this study, we investigated the transcriptomic changes of the uppermost main stems of Larix kaempferi in an entire rotation period using the RNA-Seq method. In total, ∼151 million reads were obtained from the stems of 1-, 2-, 5-, 10-, 25-, and 50-year-old L. kaempferi trees. Combining these with the published Illumina sequencing reads, 299,637 assembled transcripts were generated, of which 161,232 were annotated. Time series expression profiling identified 12,927 transcripts as differentially expressed genes (DEGs); function enrichment analysis of these DEGs showed that 459 gene ontology terms in the biological process category were enriched. These terms were associated with the processes of wood formation, such as cell differentiation, growth and death, and its hormonal regulation. Based on the expression patterns of L. kaempferi homologues of genes associated with ethylene, calcium, and cell wall expansion and synthesis, the regulatory network of tracheid growth was outlined. Altogether, the comparative transcriptomic analysis reported here demonstrated the molecular aspects of aging effects on L. kaempferi wood formation. The identification of genes involved in the regulatory network of tracheid growth provides a means of investigating the regulation of wood formation in gymnosperm trees and also offers potential targets for genetic manipulation to improve the properties of xylem fibers.

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Section: Communicated By F Gugerlimentioning

confidence: 99%

Transcriptome analysis provides insights into wood formation during larch tree aging

Yang

Zhang

et al. 2017

Tree Genetics & Genomes

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“…Once the adult (reproductive) period is induced by natural or artificial conditions (which may reduce the juvenile period to just two years after germination), the olive tree buds undergo a standard differentiation program towards flowers and fruits (with a natural tendency to produce large numbers of them), being genetically controlled [4], unless such pathway is inhibited. In such a case, the olive tree buds are directed towards vegetative buds.…”

Section: Introductionmentioning

confidence: 99%

Nutrition Metabolism Plays an Important Role in the Alternate Bearing of the Olive Tree (Olea europaea L.)

et al. 2013

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The olive tree (Olea europaea L.) is widely known for its strong tendency for alternate bearing, which severely affects the fruit yield from year to year. Microarray based gene expression analysis using RNA from olive samples (on-off years leaves and ripe-unripe fruits) are particularly useful to understand the molecular mechanisms influencing the periodicity in the olive tree. Thus, we carried out genome wide transcriptome analyses involving different organs and temporal stages of the olive tree using the NimbleGen Array containing 136,628 oligonucleotide probe sets. Cluster analyses of the genes showed that cDNAs originated from different organs could be sorted into separate groups. The nutritional control had a particularly remarkable impact on the alternate bearing of olive, as shown by the differential expression of transcripts under different temporal phases and organs. Additionally, hormonal control and flowering processes also played important roles in this phenomenon. Our analyses provide further insights into the transcript changes between ”on year” and “off year” leaves along with the changes from unrpipe to ripe fruits, which shed light on the molecular mechanisms underlying the olive tree alternate bearing. These findings have important implications for the breeding and agriculture of the olive tree and other crops showing periodicity. To our knowledge, this is the first study reporting the development and use of an olive array to document the gene expression profiling associated with the alternate bearing in olive tree.

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“…Many genes have been found to function in plant aging, some of which promote maturation, such as Suppressor of Overexpression of Constans 1 (SOC1) [8], APETALA1 (AP1) [9], Squamosa-Promoter Binding Protein-Like (SPL) [10], and DAL1 (a MADS-box gene) [11], and some delay maturation or maintain the juvenile state, such as microRNA miR156 [12], miR171 [13], Tempranillo (TEM) [14], Terminal Flower 1 (TFL1) [15], MdTFL1 and MdTFL1a [16], Juvenile-to-Adult transition (JAT) [17], LaAP2L1 (a heterosis-associated AP2/EREBP transcription factor from Larix) [18], and Picea abies APETALA2-like genes [19]. In our previous study, 27 age-related transcripts were found to be expressed differentially in stems between the juvenile vegetative (1-and 2-year-old) and adult reproductive (25-and 50-year-old) phases of L. kaempferi, and some of them are homologous to the genes noted above (Figure 1), indicating that they might have similar functions in aging; meanwhile, they may be useful as molecular markers to determine the state of plants [20].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cutting, Pruning, and Grafting on the Expression of Age-Related Genes in Larix kaempferi

Zhang

Zang

Liu

et al. 2020

Forests

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Grafting, cutting, and pruning are important horticultural techniques widely used in the establishment of clonal forestry. After the application of these techniques, some properties of the plants change, however, the underlying molecular mechanisms are still unclear. In our previous study, 27 age-related transcripts were found to be expressed differentially between the juvenile vegetative (1-and 2-year-old) and adult reproductive (25-and 50-year-old) phases of Larix kaempferi.Here, we re-analyzed the 27 age-related transcripts, cloned their full-length cDNA sequences, and measured their responses to grafting, cutting, and pruning. After sequence analysis and cloning, 20 transcription factors were obtained and annotated, most of which were associated with reproductive development, and six (LaAGL2-1, LaAGL2-2, LaAGL2-3, LaSOC1-1, LaAGL11, and LaAP2-2) showed regular expression patterns with L. kaempferi aging. Based on the expression patterns of these transcription factors in L. kaempferi trees subjected to grafting, cutting, and pruning, we concluded that (1) cutting and pruning rejuvenate the plants and change their expression, and the effects of cutting on gene expression are detectable within 14 years, although the cutting seedlings are still maturing during these years; (2) within three months after grafting, the rootstock is more sensitive to grafting than the scion and readily becomes mature with the effect of the scion, while the scion is not readily rejuvenated by the effect of the rootstock; and (3) LaAGL2-2 and LaAGL2-3 are more sensitive to grafting, while LaAP2-2 is impervious to it. These findings not only provide potential molecular markers to assess the state of plants but also aid in studies of the molecular mechanisms of rejuvenation.

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Identification of a gene involved in the juvenile-to-adult transition (JAT) in cultivated olive trees

Abstract: The juvenile-to-adult transition is a complex and poorly understood process in plant development required to reach reproductive competence. For woody plants, knowl

Cited by 23 publications

References 40 publications

Transcriptome analysis provides insights into wood formation during larch tree aging

Transcriptome analysis provides insights into wood formation during larch tree aging

Nutrition Metabolism Plays an Important Role in the Alternate Bearing of the Olive Tree (Olea europaea L.)

Effects of Cutting, Pruning, and Grafting on the Expression of Age-Related Genes in Larix kaempferi

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