Apical control of lateral bud development and shoot growth in mulberry (Morus alba)

1990 ◽  
Vol 80 (3) ◽  
pp. 350-356 ◽  
Author(s):  
Takeo Suzuki
Keyword(s):  
Shoot Growth ◽  
Morus Alba ◽  
Bud Development ◽  
Apical Control ◽  
Lateral Bud

Interaction between gibberellin A4/7 and root-pruning on the reproductive and vegetative processes in Douglas-fir. IV. Effects on lateral bud development

1986 ◽  
Vol 16 (2) ◽  
pp. 211-221 ◽  
Author(s):  
J. N. Owens ◽  
J. E. Webber ◽  
S. D. Ross ◽  
R. P. Pharis
Keyword(s):  
Normal Development ◽  
Shoot Elongation ◽  
Douglas Fir ◽  
Root Pruning ◽  
Lateral Shoot ◽  
Bud Development ◽  
Lateral Bud ◽  
Mitotic Frequency ◽  
Bud Initiation ◽  
Vegetative Bud

The anatomy, mitotic frequency, size, and total insoluble carbohydrate histochemistry was studied in axillary apices from 9- and 10-year-old Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees after cone induction treatments of root-pruning and (or) stem injections of a gibberellin A4 and A7 (GA4/7) mixture. Axillary buds were initiated at the time of root-pruning, but root-pruning treatment had no effect on axillary bud initiation. Axillary apices from control and gibberellin-treated trees were similar and followed the normal sequence of bud-scale initiation, differentiation, and leaf initiation (described previously) and no cone buds differentiated. Early development of axillary apices from root-pruned and root-pruned, gibberellin-treated trees was normal, but development became retarded near the time of vegetative bud flush. Retarded apices were small with low mitotic frequency and developed many features characteristics of latent apices. Retardation of axillary apices continued until mid-July when normal development resumed and apices differentiated into reproductive buds or vegetative buds, or became latent. The trees in which the greatest retardation of apical development occurred during lateral shoot elongation produced the most cone buds. These results are discussed in relation to hypotheses proposed to explain how cultural and gibberellin treatments affect cone induction in the Pinaceae.

Relations between cytokinin level, bud development and apical control in Norway spruce, Picea abies

1995 ◽  
Vol 95 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Marie Bollmark ◽  
Hao-Jie Chen ◽  
Thomas Moritz ◽  
Lennart Eliasson
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Bud Development ◽  
Cytokinin Level ◽  
Apical Control

scholarly journals Inflorescence Bud Initiation, Development, and Bloom in Two Southern Highbush Blueberry Cultivars

2015 ◽  
Vol 140 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Alisson P. Kovaleski ◽  
Jeffrey G. Williamson ◽  
James W. Olmstead ◽  
Rebecca L. Darnell
Keyword(s):  
Interspecific Hybrids ◽  
Shoot Growth ◽  
Late Summer ◽  
Vaccinium Corymbosum ◽  
Highbush Blueberry ◽  
Bud Development ◽  
Late Fall ◽  
Southern Highbush ◽  
Bud Initiation ◽  
The Relationship

Blueberry (Vaccinium spp.) production is increasing worldwide, particularly in subtropical growing regions, but information on timing and extent of inflorescence bud development during summer and fall and effects on bloom the next season are limited. The objectives of this study were to determine time of inflorescence bud initiation, describe internal inflorescence bud development, and determine the relationship between internal inflorescence bud development and bloom period the next spring in two southern highbush blueberry [SHB (Vaccinium corymbosum interspecific hybrids)] cultivars. ‘Emerald’ and ‘Jewel’ SHB buds were collected beginning in late summer until shoot growth cessation in late fall for dissection and identification of organ development. Inflorescence bud frequency and number, vegetative and inflorescence bud length and width throughout development, and bloom were also assessed. Inflorescence bud initiation occurred earlier in ‘Emerald’ compared with ‘Jewel’. Five stages of internal inflorescence bud development were defined throughout fall in both cultivars, ranging from a vegetative meristem to early expansion of the inflorescence bud in late fall. ‘Emerald’ inflorescence buds were larger and bloomed earlier, reflecting the earlier inflorescence bud initiation and development. Although inflorescence bud initiation occurred earlier in ‘Emerald’ compared with ‘Jewel’, the pattern of development was not different. Timing of inflorescence bud initiation influenced timing of bloom with earlier initiation resulting in earlier bloom.

Shoot growth processes, assessed by bud development types, reflect Norway spruce vitality and sink prioritization

2006 ◽  
Vol 225 (1-3) ◽  
pp. 337-348 ◽  
Author(s):  
Tomás Polák ◽  
Barrett N. Rock ◽  
Petya Entcheva Campbell ◽  
Jitka Soukupová ◽  
Blanka Solcová ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Shoot Growth ◽  
Growth Processes ◽  
Bud Development

Long-shoot bud development, shoot growth, and foliage production in provenances of lodgepole pine

1987 ◽  
Vol 17 (11) ◽  
pp. 1421-1433 ◽  
Author(s):  
Conor O'Reilly ◽  
John N. Owens
Keyword(s):  
British Columbia ◽  
Mitotic Activity ◽  
Shoot Growth ◽  
Shoot Length ◽  
Apical Growth ◽  
Axillary Buds ◽  
Provenance Trial ◽  
Bud Development ◽  
Shoot Bud ◽  
Long Shoots

Long-shoot bud development, shoot growth, and foliage production were studied in seven provenances of Pinuscontorta Dougl. ssp. latifolia Engelm. from the major sites in British Columbia and one Yukon source growing in a provenance trial at Prince George, B.C. Branch terminal apical mitotic activity began in early March and continued until late September. Initiation of axillary buds began in May, about 2 weeks after the initiation of the subtending cataphyll. Differentiation of dwarf shoots began in early July to mid-August and continued until late October in some sources. Distal axillary buds had not always differentiated by late October in the southern sources. The duration of the period of apical growth and apical size during activity were related to final cataphyll numbers. Provenances with the widest, flattest, dormant apices produced the most cataphylls. The two northern provenances had more terminal sterile cataphylls but fewer sterile cataphylls lower in the long-shoot bud and shorter mean stem unit lengths than the others. Differences among provenances in shoot length were due mostly to variation in stem unit numbers. The large proportion of polycyclic long shoots in some provenances contributed to variation in dwarf shoot numbers.

scholarly journals Low Oxygen Delays Budbreak of Apple Trees in Greenhouse and Prolongs Storage Life

HortScience ◽  
1991 ◽  
Vol 26 (7) ◽  
pp. 890-891
Author(s):  
Eric Young ◽  
S.M. Blankenship
Keyword(s):  
Malus Domestica ◽  
Shoot Growth ◽  
Storage Life ◽  
Low Oxygen ◽  
Apple Trees ◽  
Bud Development ◽  
Oxygen Levels ◽  
Ambient Oxygen

Three percent oxygen significantly delayed and reduced budbreak of fully chilled apple (Malus domestica Borkh.) trees in a greenhouse. When ambient oxygen levels were restored, budbreak occurred normally. Apple trees stored under 3% ± 1% oxygen at 6C for 35 weeks had no detectable bud development in storage. Budbreak and subsequent shoot growth were normal after the trees had been removed from storage.

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