scholarly journals New Methodology to Teach Floral Induction in Floriculture Potted Plant Production Classes

2002 ◽  
Vol 12 (1) ◽  
pp. 157-167
Author(s):  
Neil O. Anderson
Keyword(s):  
Floral Induction ◽  
Rest Period ◽  
Plant Production ◽  
Induction Treatment ◽  
University Of Minnesota ◽  
Flower Bud ◽  
Potted Plants ◽  
Cultivated Species ◽  
The University ◽  
Bud Initiation

The increasing number of crops being grown for the floriculture market has frustrated educators faced with limited classroom and laboratory time. Time constraints necessitate selection of crops to serve as examples of floral induction treatment(s) and provide an accurate scope of production requirements for all cultivated species. Since flowers are the primary reason for purchasing most floricultural products—with the notable exception of cut and potted foliage—the various treatments required for flower bud initiation and development were used to categorize potted plants. New and old crops (>70 species) are categorized for flower bud initiation and development requirements, including photoperiod (short, long day, day neutral; facultative/obligate responses), vernalization, temperature, autonomous, rest period, and dormancy. Crop-specific temperature, irradiance, and photoperiod interactions are noted, as well as temperature × photoperiod interactions. A course syllabus can be modified to ensure that at least one crop from each category is presented to serve as a model. It is recommended that the class focuses on example crop(s) from each floral induction category and then reviews other crops within each category for differences or similarities. This method allows coverage of floral induction categories without leaving information gaps in the students' understanding. This method was used with students in the Fall 1999, floriculture production class (Hort 4051) at the University of Minnesota, St. Paul.

scholarly journals The Floratech Dilemma: A Case Study for Potted Plant Production Specialists

2001 ◽  
Vol 11 (3) ◽  
pp. 477-481
Author(s):  
Neil O. Anderson
Keyword(s):  
Undergraduate Students ◽  
Plant Production ◽  
Limiting Factor ◽  
University Of Minnesota ◽  
Potted Plants ◽  
Potted Plant ◽  
The Board Of Directors ◽  
Course Material ◽  
The University

This paper presents a case study for use as an active learning tool with students in a floriculture potted plant production class. Students work together in small groups (three to four) to pose answers to a dilemma. With this case study, students quickly learn the names of their colleagues and work together outside-of-class to solve the assignment. Each student role-plays being hired on as a new potted plant production specialist. A memorandum from the Board of Directors is delivered on their first day of work at Floratech, a company specializing in potted plants. Floratech is a finisher company, purchasing plugs (vegetative or seed-propagated crops) from plug producers and rooting stations, and selling their final products to both wholesale and retail markets. Objectives of this case study are to determine 1) the students' fluency in terminology for potted plant production, 2) ideal production time/labor inputs for the Floratech potted crops, and 3) limiting factor(s) preventing each crop from reaching this goal. As the students progress through the course material, they refer to the memorandum for clarification of unknown terms. Unresolved questions are raised during the semester (in the classroom and during laboratory tours) to other players interacting in the memorandum, i.e., Floratech staff (growers, sales people, management), its suppliers (rooting stations, plug producers, distributors, breeders, producers, operations, quality control), and customers (wholesale, retail). This case study was tested with undergraduate students enrolled in HORT 4051, Floriculture Production and Management I (Potted Plants) at the University of Minnesota, St. Paul, during Fall Semester 1999.

Floral induction in date palm seedlings (Phoenix dactylifera var. Deglet Nour) cultured in vitro

1987 ◽  
Vol 65 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Saïda Ammar ◽  
Abdellatif Benbadis ◽  
Bal Krishna Tripathi
Keyword(s):  
Date Palm ◽  
Root Formation ◽  
Early Stage ◽  
Floral Induction ◽  
Phoenix Dactylifera ◽  
Flower Bud ◽  
Precocious Flowering ◽  
Cultural Conditions ◽  
Bud Initiation

Flower bud initiation in 5-month-old seedlings of date palm (Phoenix dactylifera L. var. Deglet Nour) was studied under controlled conditions. Normally inflorescence formation in mature plants takes 8 to 10 years. In juvenile plants inflorescence formation was induced in a 16-h day at 28 °C, by a combination of 6-benzylaminopurine, indoleacetic acid, and glucose or sucrose. The present investigation has determined favourable cultural conditions for floral induction in date palm in vitro at a very early stage of ontogeny. Both male and female flowers were induced on young plants. Floral induction usually occurred only when root formation was completely inhibited. The apparent antagonism between root formation and floral development suggests a possible competition in the young plant for growth substances, although production of floral inhibitory substances from the root cannot be precluded. These observations on the induction of precocious flowering in date palm seedlings suggest a model of development, corresponding to neoteny, of this tree as an herb.

scholarly journals Effects of a Gibberellin Inhibitor on Flowering, Vegetative Propagation, and Production of Rapid Generation Cycling Gladiolus for Potted Plant Production

HortScience ◽  
2021 ◽  
pp. 1-6
Author(s):  
Jaser A. Aljaser ◽  
Neil O. Anderson
Keyword(s):  
Plant Production ◽  
Production Cycle ◽  
University Of Minnesota ◽  
Cut Flowers ◽  
Flower Stalk ◽  
Potted Plants ◽  
Potted Plant ◽  
Negative Side Effects ◽  
Rapid Generation ◽  
High Concentrations

Gladiolus (Gladiolus ×hybridus) is an asexually propagated, herbaceous perennial and an economically important cut flower crop. In commercial production, gladioli have tall flower stalks, which limit their use to cut flowers and annual garden plants. The gladiolus breeding program at the University of Minnesota has bred and selected rapid generation cycling (RGC) cycle 1 gladiolus, which can flower in <1 year from seed instead of the norm of 3 to 5 years (which are vegetatively propagated as corms). Gibberellin inhibitors, such as ancymidol, are used as plant growth retardants to control height in potted plants. Higher concentrations can inhibit flowering along with other negative side effects. The aim of this study was to investigate the growth, flowering, and corm/cormel production response of cycle 1 gladiolus to the gibberellin inhibitor, ancymidol (0, 100, and 400 mg·L−1 soak) in comparison with noncycle 1 genotypes and commercial cultivars for potted gladiolus production. Cycle 1 genotypes flowered with all ancymidol concentrations while noncycle 1 genotypes had significantly fewer flowers or were completely nonflowering under higher concentrations. All tested genotypes had increased leaf width as ancymidol concentration increased. Conversely, flower stalk heights were shorter as the ancymidol concentration increased while the number of stalks was nonsignificant. Corms, cormel number, and fresh weights decreased in all genotypes except for one cycle 1 genotype, which had an increase in both corm number and fresh weight when treated with 100 mg·L−1 ancymidol. Cycle 1 gladiolus are more resilient to this gibberellin inhibitor even at high concentrations and can potentially be used for gladiolus potted plant production.

The Effects of Presentation on Noise and Dental Appliances on Speech

1981 ◽  
Vol 24 (1) ◽  
pp. 151-151
Author(s):  
Lillian Glass ◽  
Sharon R. Garber ◽  
T. Michael Speidel ◽  
Gerald M. Siegel ◽  
Edward Miller
Keyword(s):  
Southern California ◽  
University Of Southern California ◽  
University Of Minnesota ◽  
School Of Medicine ◽  
Southern California School ◽  
School Of Dentistry ◽  
The University

An omission in the Table of Contents, December JSHR, has occurred. Lillian Glass, Ph.D., at the University of Southern California School of Medicine and School of Dentistry, was a co-author of the article "The Effects of Presentation on Noise and Dental Appliances on Speech" along with Sharon R. Garber, T. Michael Speidel, Gerald M. Siegel, and Edward Miller of the University of Minnesota, Minneapolis.

Integrating Legacy Laboratory Information Systems into a Client-Server World: The University of Minnesota Clinical Workstation (CWS) Project

1995 ◽  
Vol 34 (03) ◽  
pp. 289-296 ◽  
Author(s):  
B. H. Sielaff ◽  
D. P. Connelly ◽  
K. E. Willard
Keyword(s):  
Information Systems ◽  
Clinical Decision ◽  
Database Management System ◽  
University Of Minnesota ◽  
Client Server ◽  
Clinical Workstation ◽  
Future Hospital ◽  
The Cost ◽  
The University ◽  
Laboratory Information Systems

Abstract:The development of an innovative clinical decision-support project such as the University of Minnesota’s Clinical Workstation initiative mandates the use of modern client-server network architectures. Preexisting conventional laboratory information systems (LIS) cannot be quickly replaced with client-server equivalents because of the cost and relative unavailability of such systems. Thus, embedding strategies that effectively integrate legacy information systems are needed. Our strategy led to the adoption of a multi-layered connection architecture that provides a data feed from our existing LIS to a new network-based relational database management system. By careful design, we maximize the use of open standards in our layered connection structure to provide data, requisition, or event messaging in several formats. Each layer is optimized to provide needed services to existing hospital clients and is well positioned to support future hospital network clients.

Blossom Thinning in Pome and Stone Fruit

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 553b-553
Author(s):  
Esmaeil Fallahi
Keyword(s):  
Fruit Size ◽  
Naphthalene Acetic Acid ◽  
Full Bloom ◽  
Flower Bud ◽  
Hydrogen Cyanamide ◽  
Ammonium Thiosulfate ◽  
The Past ◽  
Apple Cultivars ◽  
Ortho Cresol ◽  
Bud Initiation

Early thinning of apples is important because of its impact on fruit size and next season's flower bud initiation. In the past, apple cultivars were often sprayed with the blossom thinner sodium dinitro-ortho-cresol(Elgetol) during full bloom, followed by a post-bloom application of a fruit thinner such as carbaryl with or without naphthalene acetic acid (NAA). Elgetol was removed from the market in 1989 because of the high cost of re-registration. Full-bloom sprays of sulfcarbamide (Wilthin), pelargonic acid (Thinex), and endothalic acid (Endothal), ammonium thiosulfate (ATS) or petal fall spray of carbaryl (Sevin XLR Plus) were developed as replacements for Elgetol. Hydrogen cyanamide (HC) and other chemicals have been used to eliminate or to reduce chilling requirements of peaches grown under the warm desert conditions. HC applied at “pink bloom” stage was observed to reduce the number of open blooms in `Florda Prince' peach; therefore, it was first used for blossom thinning in this cultivar in Arizona. Later, HC was also found to be an effective blossom thinner for plums in Idaho. HC has recently been found to effectively thin apple and peach blossoms. Armothin has also been an effective blossom thinner for peach in California.

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