scholarly journals Anatomy and morphology in developing vegetative buds on detached Norway spruce branches in controlled conditions before bud burst

2009 ◽  
Vol 29 (11) ◽  
pp. 1457-1465 ◽  
Author(s):  
S. Sutinen ◽  
J. Partanen ◽  
A. Vihera-Aarnio ◽  
R. Hakkinen
Keyword(s):  
Norway Spruce ◽  
Bud Burst ◽  
Controlled Conditions ◽  
Vegetative Buds

Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns

Trees ◽  
2004 ◽  
Vol 19 (1) ◽  
pp. 66-72 ◽  
Author(s):  
Jouni Partanen ◽  
Heikki H�nninen ◽  
Risto H�kkinen
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Preliminary Evidence ◽  
Bud Burst

Bud development in Picea engelmannii. I. Vegetative bud development, differentiation, and early development of reproductive buds

1983 ◽  
Vol 61 (9) ◽  
pp. 2291-2301 ◽  
Author(s):  
Derek L. S. Harrison ◽  
John N. Owens
Keyword(s):  
Shoot Elongation ◽  
Longitudinal Axis ◽  
Leaf Primordia ◽  
Axillary Buds ◽  
Picea Engelmannii ◽  
Bud Burst ◽  
Bud Development ◽  
Vegetative Buds ◽  
Terminal Buds ◽  
Mother Cells

Vegetative buds of Engelmann spruce (Picea engelmannii Parry) from the Prince George Forest District (British Columbia) were collected and studied. In mid-April, dormancy ended as determined from mitotic divisions within the leaf primordia; 2 weeks later mitotic activity occurred in the bud apices. Bud-scale initiation began in terminal buds by late May followed by that in axillary buds 2 weeks later. Shoot elongation began in late May, bud burst occurred in late June, and both shoot elongation and bud-scale initiation were complete by late July. Terminal buds began to differentiate by the initiation of leaf primordia, into vegetative buds early in August whereas axillary buds began to differentiate 1 week later. Leaf initiation was completed in all vegetative buds by late September and buds were dormant by mid-October. Pollen cones initiated microsporophylls after bud-scale initiation. Microsporangial initiation began in late August. Microsporangial enlargement began in mid-September and continued until dormancy when pollen mother cells were observed in a premeiotic stage. Seed cones initiated bracts directly after bud-scale initiation. In mid-August, ovuliferous scales began to be initiated. Two ovule primordia formed adaxially, one on each side of the median longitudinal axis of each ovuliferous scale. Each ovule formed one large central megaspore mother cell which overwintered in a premeiotic stage.

Bud development in western hemlock. I. Annual growth cycle of vegetative buds

1973 ◽  
Vol 51 (11) ◽  
pp. 2223-2231 ◽  
Author(s):  
John N. Owens ◽  
Marje Molder
Keyword(s):  
Mitotic Activity ◽  
Shoot Elongation ◽  
Growth Cycle ◽  
Leaf Primordia ◽  
Annual Growth ◽  
Western Hemlock ◽  
Bud Burst ◽  
Bud Development ◽  
Vegetative Buds ◽  
Number Of Leaves

Vegetative apices of mature Tsnga heterophylla (Raf.) Sarg. were studied throughout the annual growth cycle. Apices become mitotically active during the last week of March. Leaf primordia elongate, causing the buds to swell, while the apex remains small and produces bud scales. Axillary buds are initiated about mid-April. Little shoot elongation occurs before vegetative buds burst in mid-May. After bud burst, rapid shoot elongation occurs for about 7 weeks, during which time the apex also elongates and the rest of the bud scales are initiated. There is a marked increase in mitotic activity in the apex during the transition from bud-scale initiation to leaf initiation, which occurs early in July when the grand phase of shoot elongation is complete. This is believed to be the time when vegetative apices undergo transition to become reproductive apices. Leaf primordia are initiated in rapid succession until mid-August, when two-thirds of the final number of leaves are initiated and the subtending shoot is fully elongated. From mid-August until mid-November, no shoot elongation occurs, leaf primordia are initiated more slowly, and mitotic activity in the apex gradually decreases. After all of the next season's leaves have been initiated, about mid-November, mitotic activity in the apex stops and the vegetative buds become dormant.

Phosphoenolpyruvate Carboxylase Activity In Norway Spruce Needles: Effects Of Air Pollutants Under Controlled Conditions

1991 ◽  
Vol 46 (5-6) ◽  
pp. 502-506 ◽  
Author(s):  
Hartwig Hohlfeld ◽  
Cornelius Lütz ◽  
Dieter Strack
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Phosphoenolpyruvate Carboxylase ◽  
Air Pollutants ◽  
Carboxylase Activity ◽  
Controlled Conditions ◽  
High Concentrations ◽  
Spruce Needles

The effect of mixtures of air pollutants (SO2, NO2, O3) on phosphoenolpyruvate carboxylase (PEPCase; EC 4.1.1.31) activities from needles of four-year-old Norway spruce (Picea abies [L.] Karst.) in closed fumigation chambers were analyzed. Three months exposure to high concentrations of O3 (1030 µg/m3) together with SO2 (1030 µg/m3) or NO2 (615 µg/m3) resulted in a dramatic increase in PEPCase activities

scholarly journals The epigenetic memory of temperature during embryogenesis modifies the expression of bud burst-related genes in Norway spruce epitypes

Planta ◽  
2017 ◽  
Vol 246 (3) ◽  
pp. 553-566 ◽  
Author(s):  
Elena Carneros ◽  
Igor Yakovlev ◽  
Marcos Viejo ◽  
Jorunn E. Olsen ◽  
Carl Gunnar Fossdal
Keyword(s):  
Norway Spruce ◽  
Bud Burst ◽  
Epigenetic Memory

scholarly journals Internal development of vegetative buds of Norway spruce trees in relation to accumulated chilling and forcing temperatures

2014 ◽  
Vol 34 (5) ◽  
pp. 547-556 ◽  
Author(s):  
A. Vihera-Aarnio ◽  
S. Sutinen ◽  
J. Partanen ◽  
R. Hakkinen
Keyword(s):  
Norway Spruce ◽  
Internal Development ◽  
Vegetative Buds
Sign in / Sign up

Export Citation Format

Share Document