Bud set in Abies nordmanniana Spach. influenced by bud and branch manipulations

Rasmussen, Henrik; Soerensen, Steen; Andersen, Lillie

doi:10.1007/s00468-003-0268-9

Cited by 9 publications

(8 citation statements)

References 15 publications

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“…Wallgren et al (2014) found that grazing may require Scots pines (Pinus sylvestris) to allocate more resources into the compensation of the removed tissues, such as forming new buds, and less into height and diameter growth. Similar results has been found by Rasmussen et al (2003) in case of growth allocation changes of Abies nordmanniana L. European yew develops lateral buds at irregular intervals, they are frequent along the stem, which explains why T. baccata can withstand pruning the main trunk (Thomas & Polwart, 2003). In addition, Taxus baccata has a tendency to form multiple stems (Thomas & Polwart, 2003), but it seems that in undisturbed populations, most individuals are monocormic, this was the case in the Knyazhdvir Nature Reserve (Ukraine), where the percentage of one-stemmed individuals ranged between 74 and 87% (Iszkuło et al, 2005), similar to the percentage of one-stemmed, un-grazed saplings in our study.…”

Section: Growthsupporting

confidence: 92%

Influence of herbivory pressure on the growth rate and needle morphology of Taxus baccata L. juveniles

Kýpeťová¹,

Walas²,

Jaloviar³

et al. 2017

Dendrobiology

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Damage by herbivore grazing negatively influences the development of subsequent forest generations. Little is known about the long-term impacts of grazing and interactions between grazing and light conditions on sapling growth after the cessation of herbivory impact. In this study, Taxus baccata saplings were grown over a period of four years in artificial shading at 2, 8, 30 and 100% of full sunlight (described as initial light). These saplings were planted in fenced and unfenced plots in a mixed forest in Poland. After six years with no protection from grazing, deer pressure was eliminated by fencing. In this study, we analysed sapling growth and needle morphology five years after deer suppression. Overall, grazing had a negative significant impact on the growth rate and needle morphology of T. baccata saplings. Saplings damaged by herbivores had a height increment approximately one-third that of non-grazed saplings. The grazed yew saplings had a lower needle area and length and a higher specific leaf area (SLA) than non-grazed saplings. Initial and current light conditions did not influence tree growth rates and needle morphology. However, we found positive correlations between sapling height and both leaf area and leaf length and a negative correlation between sapling height and SLA. Browsed yews also had a greater tendency to form polycormic (multi-stemmed) individuals. Lower growth rates, smaller needles and polycormic stems indicate a strategy of "escaping" herbivory pressure even five years after elimination of deer pressure.

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Section: Growthsupporting

confidence: 92%

Influence of herbivory pressure on the growth rate and needle morphology of Taxus baccata L. juveniles

Kýpeťová¹,

Walas²,

Jaloviar³

et al. 2017

Dendrobiology

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“…The observed ubiquitin signal suggests that axillary buds were initiated, but the signal transduction pathway was terminated very early in the process, causing the ubiquitin signal to disappear before any organogenesis (Fig. Several observations reveal the potential for additional axillary meristems: Both shoot wounding ( Burrows, 1989 ) and bud removal ( Rasmussen et al, 2003 ) may increase axillary bud set experimentally, and a presumed natural mutation of A. nordmanniana occurs that causes bud set above each needle (our unpublished observation). In a few cases, however, buds actually developed (Fig.…”

Section: Resultsmentioning

confidence: 86%

Ontogeny in terminal buds of Abies nordmanniana (Pinaceae) characterized by ubiquitin

Veierskov

Rasmussen

Eriksen

2008

American J of Botany

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Meristematic activity in the bud meristem of Abies nordmanniana was visualized by ubiquitin immunohistochemical localization from before bud break and throughout shoot expansion. Ubiquitin was detected in meristematic cells either in the cytosol or nucleus, or both, depending on tissue type and developmental stage. During winter dormancy, ubiquitin was only observed in the protodermal/hypodermal layers, but at bud break in mid May, the signal expanded to the entire shoot tip. At the end of May, a clear zonation in ubiquitin localization appeared that lasted about one month. Throughout this period, ubiquitin was barely detectable in a central group of cells that might indicate an organizing center with stem cells. At the end of June, coinciding with the transition from scale leaf to needle primordia production, ubiquitin again was more prevalent in the peripheral cell layers. During shoot expansion, a strong ubiquitin signal developed in the axil of all needles. Most of these signals later disappeared, except for those few axils where buds actually developed. A strong ubiquitin signal was also observed in cells lining the young resin ducts. Our data showed that ubiquitin may be used as a marker for metabolic activity associated with seasonal development in the apical meristem.

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“…Removal of whorl and lateral buds and whorl branch tips changed the shoot DW accumulation probably in parallel with loss of the photosynthetic area in the removed buds [23] (Fig. 2b).…”

Section: Discussionmentioning

confidence: 99%

“…The removal of whorl buds (subapical buds) in 3-year-old A. nordmanniana seedlings increased leader growth by up to 30% after transplanting, probably by removing competition to the apical bud [22]. The removal of * Corresponding author: lillie.andersen@agrsci.dk a larger part, such as whorl branches reduced shoot growth after transplantning in A. nordmanniana [23]. The question is whether root growth will be reduced by the bud and branch treatment, as has been shown in Abies balsamea [15].…”

Section: Introductionmentioning

confidence: 99%

Post-transplant root and shoot development inAbies nordmannianaSpach. seedlings after whorl bud and branch pruning

Andersen¹,

Soerensen²,

Rasmussen

2006

Ann. For. Sci.

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-After lifting in a nursery, 3-year-old seedlings of Abies nordmanniana were treated for improvement in new leader growth after transplanting. The treatments were: (A) whorl (subapical) buds, lateral buds at the stem and whorl branch tips removed; (B) as (A), but with whorl branches removed at their junction to the stem; and (C) untreated control seedlings. After transplanting in April, plant samples were lifted in June, July and September to determine the effect of treatments on root and shoot development. Root length and number of root tips were determined by scanning and computed image analysis. Height, dry weight of shoot and root and ratio between these were determined. Removal of whorl and lateral buds and whorl branch tips had a negative effect on root and shoot growth after transplanting. Root length, number of root tips and shoot dry weight were reduced, but by September equaled the untreated control seedlings. Removal of whorl branches caused a significant reduction in both root length and shoot dry weight compared to untreated control seedlings. longueur des racines / racine/pousse / scanner des pointes racinaires

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Bud set in Abies nordmanniana Spach. influenced by bud and branch manipulations

Cited by 9 publications

References 15 publications

Influence of herbivory pressure on the growth rate and needle morphology of Taxus baccata L. juveniles

Influence of herbivory pressure on the growth rate and needle morphology of Taxus baccata L. juveniles

Ontogeny in terminal buds of Abies nordmanniana (Pinaceae) characterized by ubiquitin

Post-transplant root and shoot development inAbies nordmannianaSpach. seedlings after whorl bud and branch pruning

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