Genetics and Genomics of Tree Architecture

Costes, Evelyne; Gion, Jean‐Marc

doi:10.1016/bs.abr.2015.05.001

Cited by 15 publications

(11 citation statements)

References 216 publications

(245 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the shape of a crown is developmentally plastic, and influenced by internal competition between branches as well as interactions with the environment (Tomlinson, 1983; Turnbull, 2005; Barthélémy and Caraglio, 2007; Costes et al , 2014; Costes and Gion, 2015). How the crown maintains its operational hierarchy over multiple seasons is virtually unknown.…”

Section: Discussionmentioning

confidence: 99%

“…Branches compete for resources, whereas the development of secondary, tertiary, and higher order branches exponentially enhances the complexity of a tree (Turnbull, 2005; Costes et al , 2014; Costes and Gion, 2015). Branching patterns are constrained by phyllotaxis as branches grow out of axillary meristems (AXMs) that arise in the axils of leaves.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Axillary buds are dwarfed shoots that tightly regulate GA pathway and GA-inducible 1,3-β-glucanase genes during branching in hybrid aspen

Rinne

Paul

Vahala

et al. 2016

EXBOTJ

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Axillary buds are dwarfed shoots that tightly regulate GA pathway and GA-inducible 1,3-β-glucanase genes during branching in hybrid aspen

Rinne

Paul

Vahala

et al. 2016

EXBOTJ

View full text Add to dashboard Cite

show abstract

“…Characterization of architecture phenotypes for previously uncharacterized Arabidopsis mutants support the relevance of this type of studies in providing basic developmental knowledge not only relevant for trees but even in for the well-known Arabidopsis model. The recent efforts from many research groups in gathering genomic information for tree species (Costes and Gion, 2015 ), including fruit trees, provides an excellent framework for further work on establishing additional functional connections with gene candidate orthologs in these species and for cross-reference of functional data in relation to genetic determination of tree architecture. They could also help in the functional annotation of the many candidate genes of unknown functions, identified through the microarray analysis in this study.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis Using Olive Varieties and Breeding Progenies Identifies Candidate Genes Involved in Plant Architecture

et al. 2016

View full text Add to dashboard Cite

Plant architecture is a critical trait in fruit crops that can significantly influence yield, pruning, planting density and harvesting. Little is known about how plant architecture is genetically determined in olive, were most of the existing varieties are traditional with an architecture poorly suited for modern growing and harvesting systems. In the present study, we have carried out microarray analysis of meristematic tissue to compare expression profiles of olive varieties displaying differences in architecture, as well as seedlings from their cross pooled on the basis of their sharing architecture-related phenotypes. The microarray used, previously developed by our group has already been applied to identify candidates genes involved in regulating juvenile to adult transition in the shoot apex of seedlings. Varieties with distinct architecture phenotypes and individuals from segregating progenies displaying opposite architecture features were used to link phenotype to expression. Here, we identify 2252 differentially expressed genes (DEGs) associated to differences in plant architecture. Microarray results were validated by quantitative RT-PCR carried out on genes with functional annotation likely related to plant architecture. Twelve of these genes were further analyzed in individual seedlings of the corresponding pool. We also examined Arabidopsis mutants in putative orthologs of these targeted candidate genes, finding altered architecture for most of them. This supports a functional conservation between species and potential biological relevance of the candidate genes identified. This study is the first to identify genes associated to plant architecture in olive, and the results obtained could be of great help in future programs aimed at selecting phenotypes adapted to modern cultivation practices in this species.

show abstract

“…The crown architecture is of particular importance here, because of its direct link to a tree's light absorption (Ishii and Asano 2010;Sapijanskas et al 2014;Forrester et al 2018). While the fundamental architecture of the crown is embedded in the speciesspecific genotype (Costes and Gion 2015), the actual stature and allometry is strongly influenced by the local tree species composition and resource supply (De Kroon et al 2005;Bayer et al 2013;del Río et al 2019). Besides abiotic factors, e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of local neighbourhood diversity on crown structure and productivity of individual trees in mature mixed-species forests

et al. 2021

View full text Add to dashboard Cite

Background Species-specific genotypic features, local neighbourhood interactions and resource supply strongly influence the tree stature and growth rate. In mixed-species forests, diversity-mediated biomass allocation has been suggested to be a fundamental mechanism underlying the positive biodiversity-productivity relationships. Empirical evidence, however, is rare about the impact of local neighbourhood diversity on tree characteristics analysed at a very high level of detail. To address this issue we analysed these effects on the individual-tree crown architecture and tree productivity in a mature mixed forest in northern Germany. Methods Our analysis considers multiple target tree species across a local neighbourhood species richness gradient ranging from 1 to 4. We applied terrestrial laser scanning to quantify a large number of individual mature trees (N = 920) at very high accuracy. We evaluated two different neighbour inclusion approaches by analysing both a fixed radius selection procedure and a selection based on overlapping crowns. Results and conclusions We show that local neighbourhood species diversity significantly increases crown dimension and wood volume of target trees. Moreover, we found a size-dependency of diversity effects on tree productivity (basal area and wood volume increment) with positive effects for large-sized trees (diameter at breast height (DBH) > 40 cm) and negative effects for small-sized (DBH < 40 cm) trees. In our analysis, the neighbour inclusion approach has a significant impact on the outcome. For scientific studies and the validation of growth models we recommend a neighbour selection by overlapping crowns, because this seems to be the relevant scale at which local neighbourhood interactions occur. Because local neighbourhood diversity promotes individual-tree productivity in mature European mixed-species forests, we conclude that a small-scale species mixture should be considered in management plans.

show abstract

Genetics and Genomics of Tree Architecture

Cited by 15 publications

References 216 publications

Axillary buds are dwarfed shoots that tightly regulate GA pathway and GA-inducible 1,3-β-glucanase genes during branching in hybrid aspen

Axillary buds are dwarfed shoots that tightly regulate GA pathway and GA-inducible 1,3-β-glucanase genes during branching in hybrid aspen

Transcriptomic Analysis Using Olive Varieties and Breeding Progenies Identifies Candidate Genes Involved in Plant Architecture

Effects of local neighbourhood diversity on crown structure and productivity of individual trees in mature mixed-species forests

Contact Info

Product

Resources

About