Effects of Plant-Growth Regulators on Shoot Development and Field Survival of Forest-Tree Seedlings

1945 ◽  
Vol 107 (2) ◽  
pp. 139-183 ◽  
Author(s):  
Carl E. Ostrom
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Forest Tree ◽  
Shoot Development ◽  
Tree Seedlings

scholarly journals Growth, Plant Quality, and Survival of Sweet Cherry (Prunus avium L.) Seedlings are Enhanced by CO2 Enrichment

HortScience ◽  
2017 ◽  
Vol 52 (12) ◽  
pp. 1650-1654
Author(s):  
Margarita Pérez-Jiménez ◽  
Almudena Bayo-Canha ◽  
Gregorio López-Ortega ◽  
Francisco M. del Amor
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Prunus Avium ◽  
Soluble Sugars ◽  
Plant Quality ◽  
Physiological Status ◽  
Tree Seedlings ◽  
Cherry Tree ◽  
Active Growth

Enrichment with CO2 and a commercial mix of plant growth regulators were tested to improve the plant quality and survival of pregerminated cherry tree seedlings. Pregerminated seeds were transferred from a cold chamber to a climatic chamber where the CO2 was set at 800 µmol·mol−1 CO2 or at the ambient CO2 concentration. Also, half of the plants were sprayed with the mix of plant growth regulators and disposed randomly. The experiment lasted 18 days and physiological measurements, such as plant physiological status and growth, number of leaves, net CO2 assimilation (ACO2), internal CO2, stomatal conductance, and transpiration, were taken every 4 days. Also, at the end of the experiment, other parameters—such as total leaf area, photosynthetic pigments, soluble sugars, and starch—were recorded or quantified. During the experiment, plants cultured under CO2 enrichment exhibited a rapid increase in their photosynthetic rates, height, and leaf number; the commercial mix also increased plant height but inhibited leaf expansion and growth. At the end of the experiment, the amounts of starch and soluble sugars had increased in the plants grown under elevated CO2, compared with those plants grown in control conditions or with the commercial mix. Thus, culture at elevated CO2 achieved higher percentages of plant survival and of plants in active growth. We suggest that CO2 plays an important role—by increasing ACO2, water use efficiency, soluble sugars, and starch—which results in plants that are physiologically more prepared for transfer to the field.

Role of alkyl silatranes as plant growth regulators: comparative substitution effect on root and shoot development of wheat and maize

2018 ◽  
Vol 98 (13) ◽  
pp. 5129-5133
Author(s):  
Gurjaspreet Singh ◽  
Geetika Sharma ◽  
Sanchita ◽  
Pooja Kalra ◽  
Daizy R Batish ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Substitution Effect ◽  
Shoot Development

The flush development of evergreen recurrent flushing perennials: an experimental overview with insights into the flowering of olive

2020 ◽  
Vol 68 (5) ◽  
pp. 345
Author(s):  
Trevor Olesen ◽  
Michelle Wirthensohn
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Shoot Development ◽  
New Work ◽  
Temperature Dependent ◽  
Final Size ◽  
Stimulation Of

Recurrent flushing perennials are those that grow by episodic waves of shoot extension under conditions continuously favourable for growth. Here we review the habit for evergreen perennials. The commencement of a new flush appears to depend on the stimulation of buds by plant growth regulators. The determination of a new flush as vegetative or floral most likely occurs during early shoot development. Cool temperatures are usually florally inductive, but other factors such as periods of water stress before flush commencement, and low crop loads may also enhance induction. There is little evidence for the control of the final size of vegetative shoots, and even less for the size of floral shoots. The time between successive flushes is cyclic and temperature dependent. New work with olive is presented and shows that pruning increases the proportions of vegetative shoots to develop from comparable nodes of pruned and non-pruned branches. It also shows that immature vegetative flushes on olive branches in winter inhibit flowering to some extent, a result previously shown for other evergreen recurrent flushing trees.

scholarly journals Effects of Cyclanilide and Benzyladenine Tank Mixes on Shoot Production and Growth of Three Woody Landscape Species during Production

2010 ◽  
Vol 28 (2) ◽  
pp. 91-95
Author(s):  
M.E. Farris ◽  
G.J. Keever ◽  
J.R. Kessler ◽  
J.W. Olive
Keyword(s):  
Plant Growth ◽  
Synergistic Effect ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Synergistic Effects ◽  
Growing Season ◽  
Shoot Development ◽  
Shoot Production ◽  
Nursery Production ◽  
North Lake

Abstract A study was conducted to determine if there were synergistic effects from applying two plant growth regulators (PGRs), cyclanilide (CYC) and benzyladenine (BA), with cytokinin properties on Rhaphiolepis sp. (L.) Lindl. ‘Conor’ and ‘Snow White’ (Indian hawthorn), Rhododendron L. ‘North Lake Beauty’ (azalea), and Ilex crenata Thunb. ‘Sky Pencil’ (Japanese holly) during nursery production. Foliar applications of 100 or 200 ppm CYC promoted new shoot development in all species, whereas 2500 ppm BA either had no effect or suppressed shoot development, except in one of two experiments when shoot development was promoted in holly. With no species was there a synergistic effect on shoot development from combining the two PGRs, even when both PGRs individually promoted new shoot development in holly. Indian hawthorn and holly developed transient symptoms of toxicity in response to CYC, BA, and CYC + BA combinations that had dissipated by the end of the growing season and had no lasting effects on plant quality.

scholarly journals Use of plant growth regulators in fig tree seedlings ‘Roxo de Valinhos’

2019 ◽  
pp. 441-449
Author(s):  
Jackson Mirellys Azevêdo Souza ◽  
Sarita Leonel ◽  
Marcelo de Souza Silva ◽  
Rafael Bibiano Ferreira ◽  
Rafael Augusto Ferraz ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Tree Seedlings ◽  
Fig Tree

scholarly journals Rolesof plant growth regulators on the shoot development from the shoot apical meristem of Eustoma grandiflorum (RAF.) shinners

2018 ◽  
Vol 1 (6) ◽  
pp. 58-67
Author(s):  
Huyen Thach Quynh Ngo ◽  
Huong Thanh Tran ◽  
Viet Trang Bui
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Adventitious Shoots ◽  
Shoot Development ◽  
Ms Medium ◽  
Eustoma Grandiflorum ◽  
Shoot Initiation

In this paper, plant growth regulators including 6-benzylaminopurine (BA), kinetin, indole-3-acetic acid (IAA), gibberellic acid (GA3) and ethrel, at different concentrations were used individually or in combination to induce adventitious shoots from the explants, which contain shoot apical meristem and young leaves. Histological and physiological changes during shoot development were analysed. The highest shoot initiation was achieved on Murashige and Skoog (MS) medium supplemented with 0.5 mg/L BA and 1.0 mg/L GA3. Regenerated shoots were rooted on MS medium with 0.25 or 0.5 mg/L IAA. Shoot development from in vitro shoot explants initiated from the axil and cortex of stem. The shoot regeneration from shoot apical explants was effected by the meristem integrity or auxin from shoot apical meristem. Roles of plant growth regulators, especially polar auxin transport, and the ablation on the shoot initiation were discussed.

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