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2. Differences in Inflorescence Numbers and Endogenous Gibberellic Acid Levels in ‘Afterglow’ Bougainvillea
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Chng, Mun Wye (author) and Moore, Kimberly A. (author)
- Format:
- Journal article
- Language:
- International
- Publication Date:
- 2020-12-01
- Published:
- USA: American Society for Horticultural Science
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 202 Document Number: D12048
- Journal Title:
- Hort Technology
- Journal Title Details:
- Vol. 30, issue 6
- Notes:
- 4 pages, via Online journal, Bougainvillea (Bougainvillea sp.) plant inflorescence number will vary in response to multiple cues such as changes in temperature, water, light intensity, pruning, and photoperiod. Previous research reports that the application of plant growth regulators (PGRs) to bougainvillea grown under varying photoperiods improved inflorescence number, probably as a result of changes in gibberellic acid (GA) levels. There are many bioactive plant GAs, but we chose to investigate differences in gibberellic acid 3 (GA3) levels and inflorescence number in response to the application of ethephon (2-cholorethylphosponic acid) or abscisic acid (ABA) to ‘Afterglow’ bougainvillea (Bougainvillea ×buttiana) grown under 14-hour photoperiod [long-day (LD)] conditions. Plants were 5 inches tall with seven visible lateral nodes and were grown in a greenhouse in 4-inch pots filled with 5-mm coarse aquarium zeolite. Ethephon was applied as a foliar spray at 0.05, 0.07, 0.10, 0.15, or 0.20 mg/plant. ABA was applied as a soil drench at 1, 1.5, 3, 6, 8, or 10 mg/plant. Endogenous levels of GA3 were measured 1 and 48 days after treatment to calculate the change in GA3 (∆GA3). A short day (SD) control of 8 hours was included to measure differences in inflorescence number and ∆GA3 between photoperiods. ‘Afterglow’ plants grown under SD conditions had the greatest decrease in ∆GA3 (–1.09 µg·g–1) over 48 days and the most inflorescences (10.6) compared with LD control plants with a decrease in ∆GA3 of –0.09 µg·g–1 and fewer inflorescences (1.0). Plants grown under LD conditions and treated with 0.05 mg/plant ethephon had inflorescence numbers (9.6) and levels of ∆GA3 (–0.74 µg·g–1) similar to the SD control. As ethephon rate increased to more than 0.05 mg/plant, inflorescence number on LD plants decreased and ∆GA3 increased. Exogenous ABA rates of 1 mg/plant produced inflorescence numbers (1.4) and ∆GA3 (–0.10 µg·g–1) similar to the LD control. As the rate increased, ∆GA3 increased and inflorescence number decreased. Plants treated with ABA rates of 3 mg/plant and more were defoliated and had no inflorescences.
3. General market statistics
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Breyer, Ralph F. (author)
- Format:
- Abstract
- Publication Date:
- 1948-04
- Published:
- USA
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D07608
- Journal Title:
- Journal of Marketing
- Journal Title Details:
- 12(4) : 521-523
4. Research training thoughts
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Kroupa, Eugene A. (author)
- Format:
- Correspondence
- Publication Date:
- 2018-01-01
- Published:
- USA
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 151 Document Number: D10052
- Notes:
- 3 pages., Correspondence via email., Recommends that agricultural communications students take course work to learn how to do statistical tests and interpret the results of others' research.
5. Rural data needs during rapidly changing times
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Bonnen, James T. (author / Michigan State University)
- Format:
- Conference paper
- Publication Date:
- 1989
- Published:
- USA
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 91 Document Number: C06626
- Notes:
- Bonnen; Paper presented to the Conference on Rural Data Needs : the Role of Public Universities; 1989 March 29-31; Lexington, KY, East Lansing, MI : Department of Agricultural Economics, Michigan State University, 1989. 23 p. (Staff paper no. 89-62)
6. Statistical methods for agricultural communications research
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Powers, R.D. (author / University of Wisconsin, Department of Agricultural Journalism) and University of Wisconsin, Department of Agricultural Journalism
- Format:
- Manual
- Publication Date:
- 1966
- Published:
- USA
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 27 Document Number: B02762
- Notes:
- Madison, WI : University of Wisconsin, College of Agriculture, Department of Agricultural Journalism, 1966. 53 p. (Bulletin 35)