Prevention of the flowering of a tree, silver birch

Lemmetyinen, Juha; Keinonen, Kaija; Sopanen, Tuomas

doi:10.1023/b:molb.0000022525.96200.53

Cited by 51 publications

(36 citation statements)

References 13 publications

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“…The number of publications on sterility induction in forest trees is still very low (Meilan et al 2001, Skinner et al 2003, Fladung & Hoenicka 2004, Lemmetyinen et al 2004, Wei et al 2006. Most sterility approaches reported until now were based on gene constructs used successfully in crop plants.…”

Section: Introductionmentioning

confidence: 99%

Early flowering and genetic containment studies in transgenic poplar

Hoenicka¹,

Lehnhardt²,

Polak³

et al. 2012

iForest

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Despite of the immense potential of gene technologies for tree breeding, release of genetic modified trees is still very rare. Biosafety concerns have hitherto limited application of gene technologies. The potential risks of transgenic trees, in particular transfer of recombinant DNA into the gene pool of a given species via vertical gene transfer, have been motive of concern. Biosafety research may allow avoiding potential risks of this technology. However, the evaluation of strategies for prevention of vertical gene transfer, probably the most important concern toward transgenic trees, has been hindered by the long time they require to reach the reproductive phase. We tested different strategies for promoting early flowering in poplar, aiming the development of a system for biosafety studies on gene containment. Early flowering poplar containing the 35S::LFY or HSP::FT gene constructs allowed first approaches for the faster evaluation of gene containment. However, some drawbacks, e.g., disturbed vegetative growth and flower development, still limit their potential application on biosafety research. A non-transgenic hybrid aspen showing a short vegetative phase was successfully used for the evaluation of the PrMALE1::STS sterility gene construct

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Section: Introductionmentioning

confidence: 99%

Early flowering and genetic containment studies in transgenic poplar

Hoenicka¹,

Lehnhardt²,

Polak³

et al. 2012

iForest

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“…Another strategy would be the selection for plants that are completely sterile or have male sterile flowers, which is a naturally occurring phenomenon in some plant species. It can be induced in other species, including birch, by genetic modification (Lemmetyinen, Keinonen and Sopanen 2004).…”

Section: Strategies To Reduce the Allergenic Loadmentioning

confidence: 99%

Strategies for prevention and mitigation of hay fever

Schenk¹,

Vliet²,

Smulders³

et al. 2006

Allergy Matters

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Seasonal allergic rhinitis is a widespread disorder in westernized countries. It has a strong negative impact on the patient's health-related quality of life and is accompanied by considerable medical and economic costs. Currently, the socioeconomic interest in prevention is growing. Reducing or avoiding allergen exposure may result in a significant reduction of sensitization and mitigation of allergic complaints, and this reduction is in addition to existing medical prevention strategies. It will require good communication to (potential) patients on the importance and possibilities for reducing the contact with allergenic pollen. Longterm pollen monitoring and forecasts of the flowering period of allergenic plants are important tools in this respect. Reducing the allergenic load may prove an alternative prevention strategy. Pollen sources are heterogeneously distributed throughout the landscape and may be avoided or selectively removed. The use of selection, conventional breeding strategies or genetic modification may reduce the allergenicity of the pollen sources. Strategies that involve genetic modification are, however, likely to raise some public concern and acceptability of these strategies has to be considered.

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“…The incorporation of sterility genes into transgenic lines of trees has been proposed to reduce or even avoid gene flow of transgenes into interbreeding species (STRAUSS et al, 1995). The prevention of flower/inflorescence development in transgenic trees might be economically more advantageous since those sterile plants may use more of their resources for vegetative growth (BRUNNER et al, 1998;LEMMETYINEN, 2004;MOURADOV et al, 1998). However, it is not clear if sterile plants will in fact redirect their resources to produce more biomass.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The first reports of successful floral sterility induction in a forest tree species were in early flowering silver birch (Betula pendula Roth) (LEMMETYINEN, 2004;LÄNNENPÄÄ et al, 2005). Gene constructs with the barnase gene and the BpMADS1 and BpFULL1 promoters were successfully used in birch with this aim (LEMMETYINEN, 2004;LÄN-NENPÄÄ et al, 2005). Several approaches have been reported on the induction of sterility in poplar (MEILAN et al, 2001;FLADUNG and HOENICKA, 2004;HOENICKA and FLADUNG, 2003;SKINNER et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Faster Evaluation of Induced Floral Sterilit

et al. 2006

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A major concern over the use of transgenic trees is the potential for transgene dispersal through pollen and seeds. The incorporation of sterility inducing genes into transgenic lines of trees has been proposed to reduce or even avoid gene flow of transgenes into non-transgenic interbreeding species. The evaluation of strategies for the induction of sterility in transgenic forest tree species has been hindered by their long vegetative phases. In this study an early flowering 35S::Leafy poplar line was used for the faster evaluation of the sterility construct C-GPDHC::Vst1. The combination of two transgenic approaches, one to induce early flowering and a second for the induction of sterility, allowed evaluation of this sterility strategy two years after transformation. This is a very short period of time considering the long vegetative period of seven to twenty years common in forest tree species. This approach opens opportunities for the assessment of sterility mechanisms for this plant group.

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Prevention of the flowering of a tree, silver birch

Cited by 51 publications

References 13 publications

Early flowering and genetic containment studies in transgenic poplar

Early flowering and genetic containment studies in transgenic poplar

Strategies for prevention and mitigation of hay fever

Faster Evaluation of Induced Floral Sterilit

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