Temporary water restriction or light intensity limitation promotes branching in rose bush

Demotes-Mainard, Sabine; Huché-Thélier, Lydie; Morel, Philippe; Boumaza, Rachid; Guérin, Vincent; Sakr, Soulaïman

doi:10.1016/j.scienta.2012.12.005

Cited by 26 publications

(28 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, a significant environment effect was observed for these six variables, making it possible to consider the viability of controlling plant shape by acting on certain environmental factors, as demonstrated by Demotes‐Mainard et al. () in rose, for example imposing temporary restriction phases in the case of water supply, and low irradiance phases in the case of the amount of radiation.…”

Section: Discussionmentioning

confidence: 88%

See 1 more Smart Citation

Genotype × year interaction and broad‐sense heritability of architectural characteristics in rose bush

et al. 2014

Self Cite

View full text Add to dashboard Cite

The effect of genotype factors, year and their interaction was assessed on six architectural variables of eight cultivars of rose bush. Plants were grown in pots in a greenhouse in the spring of 2011 and 2012, two highly contrasted years in terms of the quantity of cumulative radiation, with a relative deviation (for 2012 compared to 2011) ranging from À24.6% (April) to +13.7% (March). Their architecture was digitized at two observation scales, the plant and the axis. Highly significant genotype (G) and year (Y) effects were revealed for all of the variables measured, as well as a G 9 Y interaction. Concerning the year effect, it was significantly higher in 2012 and for all of the variables measured. The G 9 Y interaction was due to (i) different genotype groupings according to year, (ii) difference response amplitudes between years according to genotype. Broad-sense heritability was calculated for each of these variables. It was moderate to high, ranging from 48% for the length of long axes to 98% for the number of metamers on long axes.

show abstract

Section: Discussionmentioning

confidence: 88%

“…Plant shape can therefore be controlled through the genetic pathway via plant breeding and/or control of the environment, the application of cultivation techniques such as water restriction (Morel , Demotes‐Mainard et al. ), modification of the light spectrum (Rajapakse and Kelly , Abidi et al. ) and mechanical stimulation (Morel et al.…”

mentioning

confidence: 99%

Genotype × year interaction and broad‐sense heritability of architectural characteristics in rose bush

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…As in many species, organ size in rose is influenced by environmental factors, such as water (Demotes-Mainard et al, 2013), or nitrogen (Ashok and Rengasamy, 2000; Huché-Thélier et al, 2011) availability, light quality (Rajapakse and Kelly, 1994; Maas and Bakx, 1995) and intensity (Hopper and Hammer, 1991; Bredmose, 1993; Maas and Bakx, 1995), mechanical stimulation (Morel et al, 2012), and genotype (Morel et al, 2009). Current knowledge of the effects of environmental factors is not sufficient to predict internode or leaf size in a range of environments.…”

Section: Introductionmentioning

confidence: 99%

Rose bush leaf and internode expansion dynamics: analysis and development of a model capturing interplant variability

et al. 2013

Self Cite

View full text Add to dashboard Cite

Rose bush architecture, among other factors, such as plant health, determines plant visual quality. The commercial product is the individual plant and interplant variability may be high within a crop. Thus, both mean plant architecture and interplant variability should be studied. Expansion is an important feature of architecture, but it has been little studied at the level of individual organs in rose bushes. We investigated the expansion kinetics of primary shoot organs, to develop a model reproducing the organ expansion of real crops from non-destructive input variables. We took interplant variability in expansion kinetics and the model's ability to simulate this variability into account. Changes in leaflet and internode dimensions over thermal time were recorded for primary shoot expansion, on 83 plants from three crops grown in different climatic conditions and densities. An empirical model was developed, to reproduce organ expansion kinetics for individual plants of a real crop of rose bush primary shoots. Leaflet or internode length was simulated as a logistic function of thermal time. The model was evaluated by cross-validation. We found that differences in leaflet or internode expansion kinetics between phytomer positions and between plants at a given phytomer position were due mostly to large differences in time of organ expansion and expansion rate, rather than differences in expansion duration. Thus, in the model, the parameters linked to expansion duration were predicted by values common to all plants, whereas variability in final size and organ expansion time was captured by input data. The model accurately simulated leaflet and internode expansion for individual plants (RMSEP = 7.3 and 10.2% of final length, respectively). Thus, this study defines the measurements required to simulate expansion and provides the first model simulating organ expansion in rosebush to capture interplant variability.

show abstract

“…A low light intensity or a low ratio of red/far-red (R/FR) light inhibits bud outgrowth and modulates the correlative inhibitions between buds in some species (Kebrom et al, 2006;Finlayson et al, 2010;Su et al, 2011;Demotes-Mainard et al, 2013;Furet et al, 2014;Drummond et al, 2015). In rose (Rosa hybrida) plants, darkness or far-red light (used as a single source of light) represses bud outgrowth (Girault et al, 2008).…”

mentioning

confidence: 99%

Cytokinins Are Initial Targets of Light in the Control of Bud Outgrowth

et al. 2016

Self Cite

View full text Add to dashboard Cite

Bud outgrowth is controlled by environmental and endogenous factors. Through the use of the photosynthesis inhibitor norflurazon and of masking experiments, evidence is given here that light acts mainly as a morphogenic signal in the triggering of bud outgrowth and that initial steps in the light signaling pathway involve cytokinins (CKs). Indeed, in rose (Rosa hybrida), inhibition of bud outgrowth by darkness is suppressed solely by the application of CKs. In contrast, application of sugars has a limited effect. Exposure of plants to white light (WL) induces a rapid (after 3-6 h of WL exposure) up-regulation of CK synthesis (RhIPT3 and RhIPT5), of CK activation (RhLOG8), and of CK putative transporter RhPUP5 genes and to the repression of the CK degradation RhCKX1 gene in the node. This leads to the accumulation of CKs in the node within 6 h and in the bud at 24 h and to the triggering of bud outgrowth. Molecular analysis of genes involved in major mechanisms of bud outgrowth (strigolactone signaling [RwMAX2], metabolism and transport of auxin [RhPIN1, RhYUC1, and RhTAR1], regulation of sugar sink strength [RhVI, RhSUSY, RhSUC2, and RhSWEET10], and cell division and expansion [RhEXP and RhPCNA]) reveal that, when supplied in darkness, CKs up-regulate their expression as rapidly and as intensely as WL. Additionally, up-regulation of CKs by WL promotes xylem flux toward the bud, as evidenced by Methylene Blue accumulation in the bud after CK treatment in the dark. Altogether, these results suggest that CKs are initial components of the light signaling pathway that controls the initiation of bud outgrowth.

show abstract

Temporary water restriction or light intensity limitation promotes branching in rose bush

Cited by 26 publications

References 43 publications

Genotype × year interaction and broad‐sense heritability of architectural characteristics in rose bush

Genotype × year interaction and broad‐sense heritability of architectural characteristics in rose bush

Rose bush leaf and internode expansion dynamics: analysis and development of a model capturing interplant variability

Cytokinins Are Initial Targets of Light in the Control of Bud Outgrowth

Contact Info

Product

Resources

About