MEFLUIDIDE IMPROVED THE DEVELOPMENT OF TERMINAL FLOWER BUDS OF CHILLED PEPPER PLANTS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1081G-1081
Author(s):  
Jing-fen Chen ◽  
Paul H. Li ◽  
David W. Davis
Keyword(s):  
Stress Growth ◽  
Flower Buds ◽  
Technical Grade ◽  
Days To Flowering ◽  
Terminal Flower ◽  
Cold Room ◽  
Chilling Temperatures ◽  
Adverse Influence ◽  
Post Stress ◽  
Pepper Plants

Exposure of young pepper plants to chilling temperatures delays the development of terminal flower buds to flowering during post-stress growth. Degree of adverse influence depends on chilling intensity, exposure duration and varietal sensitivity. `Ma Belle' pepper plants were grown in a greenhouse (GH) during winter months on the St. Paul campus, No supplemental lighting was provided. When plants were at the 2- to 3-leaf stage, they were foliar sprayed with mefluidide (Technical grade) at 0, 5, 10 and 15 ppm. One day after treatment, some plants were transferred from GH to a cold room (3° ∼4°C day/night) with 12-h photoperiod. Treatad plants remaining in the GH served as the control. Plants were chilled for 1, 2, 4 and 6 days and then brought back to the GH for post-stress growth and development observation. Treated and untreated plants grown in the GH showed no difference in days to flowering, and reached 50% flowering at about 62 days after treatment. When untreated plants were chilled for 1,2,4 and 6 days, they showed a delay of 8, 18, 30 and 34 days, respectively, to flowering, If not killed, as compared to the control The long delay to flowering was due to the injury of the terminal flower buds. After 4 and 6 days of chilling, most terminal flower buds were killed. However, when plants were treated with mefluidide and subsequently chilled days to flowering were significantly shortened. A difference of 10-12 days was observed between chilled untreated plants and chilled treated plants. Concentrations of 5 to 15 ppm were equally effective in protection against chilling.

scholarly journals MEFLUIDIDE IMPROVED THE DEVELOPMENT OF TERMINAL FLOWER BUDS OF CHILLED PEPPER PLANTS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1081g-1081
Author(s):  
Jing-fen Chen ◽  
Paul H. Li ◽  
David W. Davis
Keyword(s):  
Stress Growth ◽  
Flower Buds ◽  
Technical Grade ◽  
Days To Flowering ◽  
Terminal Flower ◽  
Cold Room ◽  
Chilling Temperatures ◽  
Adverse Influence ◽  
Post Stress ◽  
Pepper Plants

Exposure of young pepper plants to chilling temperatures delays the development of terminal flower buds to flowering during post-stress growth. Degree of adverse influence depends on chilling intensity, exposure duration and varietal sensitivity. `Ma Belle' pepper plants were grown in a greenhouse (GH) during winter months on the St. Paul campus, No supplemental lighting was provided. When plants were at the 2- to 3-leaf stage, they were foliar sprayed with mefluidide (Technical grade) at 0, 5, 10 and 15 ppm. One day after treatment, some plants were transferred from GH to a cold room (3° ∼4°C day/night) with 12-h photoperiod. Treatad plants remaining in the GH served as the control. Plants were chilled for 1, 2, 4 and 6 days and then brought back to the GH for post-stress growth and development observation. Treated and untreated plants grown in the GH showed no difference in days to flowering, and reached 50% flowering at about 62 days after treatment. When untreated plants were chilled for 1,2,4 and 6 days, they showed a delay of 8, 18, 30 and 34 days, respectively, to flowering, If not killed, as compared to the control The long delay to flowering was due to the injury of the terminal flower buds. After 4 and 6 days of chilling, most terminal flower buds were killed. However, when plants were treated with mefluidide and subsequently chilled days to flowering were significantly shortened. A difference of 10-12 days was observed between chilled untreated plants and chilled treated plants. Concentrations of 5 to 15 ppm were equally effective in protection against chilling.

Undergraduates' Post-Stress Growth Questionnaire

2014 ◽  
Author(s):  
Su-Mei Wu ◽  
Fang Jian-Dong
Keyword(s):  
Stress Growth ◽  
Post Stress

scholarly journals 126 THE RELATION OF PEPPER FLOWER AND FLOWER BUD ABSCISSION WITH BUD CARBOHYDRATE AND ACC CONTENT

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 446d-446
Author(s):  
H. C. Wien ◽  
A. D. Turner
Keyword(s):  
Air Temperature ◽  
Soluble Carbohydrates ◽  
Light Conditions ◽  
Flower Buds ◽  
Flower Bud ◽  
Reproductive Structures ◽  
Ethylene Precursor ◽  
Carbohydrate Levels ◽  
Acc Content ◽  
Pepper Plants

When bell pepper plants are subjected to high temperatures or low irradiance during flowering, abscission of flowers and flower buds can be severe enough to limit yields. Both types of stresses may lead to reduction of carbohydrate levels in the reproductive structures, and evolution of the abscission-causing hormone ethylene. In two greenhouse experiments, plants were subjected to combinations of 30 or 20 C air temperature and unshaded or heavily shaded conditions for one week at anthesis of the first flower. In a third experiment, plants were subjected to total darkness and temperatures of 30, 20 or 15 C for one week at the same stage of growth. In all experiments, levels of soluble carbohydrates and starch declined under low or zero light conditions, with rate of decrease proportional to the air temperature. Abscission of reproductive structures was not well correlated with carbohydrate levels: in spite of low sugars and starch, plants darkened for 7 days at 15 C showed no abscission. Levels of the ethylene precursor ACC in the buds, though variable, rose just before abscission began, but remained low in non-abscising treatments.

scholarly journals 614 PB 290 FLOWER BUD POSITION DETERMINES BLOOM AND FRUIT CHARACTERISTICS IN `ROME BEAUTY' APPLE

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 520b-520
Author(s):  
Randy R. Lee ◽  
John K. Fellman ◽  
Esmaeil Fallahi
Keyword(s):  
Fruit Quality ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Flower Buds ◽  
Flower Bud ◽  
Terminal Flower ◽  
Fruit Maturity ◽  
Lateral Bud ◽  
Bud Position ◽  
Lateral Flower

The influence of flower bud position on bloom, fruit quality, and fruit maturity was investigated on `Rome Beauty' apple (Malus domestica Borkh.). Limbs on trees containing spur terminal flower buds and lateral flower buds were tagged and the number of blossoms counted every three days until bloom ended. At harvest, fruit from each bud type were selected and seed number, fresh weight, fruit quality characteristics, and onset of ethylene production were measured. Spur terminal flower buds began blooming earlier, blossomed for a longer period of time, and produced more blossoms than lateral flower buds. Fruit from spur terminal flower buds had more seeds, were heavier, and contained more starch than lateral bud fruit. Lateral bud fruit had higher pressure values, due to smaller size, and higher soluble solids, due to consumption of starch reserves. Fruit color and titratable acidity were not significantly different regardless of bud position. Spur terminal fruit started producing ethylene eight days later than lateral bud fruit, indicating they were maturing less quickly. Cultivars such as `Fuji', `Gala', and `Braeburn' display similar growth and fruiting habits.

scholarly journals Flowering Responses of Easter Cactus Clones at Optimal and Supraoptimal Temperatures

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 613-616
Author(s):  
Thomas H. Boyle
Keyword(s):  
Night Temperature ◽  
Flower Buds ◽  
Days To Flowering ◽  
Supraoptimal Temperatures ◽  
Effects Of Temperature ◽  
Short Days

The effects of temperature and clonal genotype on flowering of Easter cactus (Rhipsalidopsis Britton & Rose) were investigated in two experiments. Plants of `Crimson Giant', `Evita', `Purple Pride', and `Red Pride' were exposed to 6 weeks of either 10C or 18C night temperature (NT) under 9- to 9.5-hour natural daylengths (ND), and afterwards were forced at 18C NT and long days (LD). All clones produced fewer flowers when exposed to 18C and ND as compared with 10C and ND; however, the clones varied significantly in their flowering responses. Relative to 10C NT and ND, exposure to 18C NT and ND resulted in an 84% to 95% decrease in the number of flower buds for `Evita', `Purple Pride', and `Red Pride', but only a 50% decrease in the number of flower buds for `Crimson Giant'. In another experiment, 23 clones were exposed to 18C NT and 8-hour short days for 6 weeks, then forced at 18C NT and LD. The clones exhibited differences in percentage of plants flowering, days to flowering, percentage of apical phylloclades flowering, and number of flower buds. `Crimson Giant' outperformed all other clones. Further breeding and selection may yield genotypes that flower more prolifically at 18C minimum than current cultivars.

Heat-induced post-stress growth delay: A biological trait of many Metarhizium isolates reducing biocontrol efficacy?

2014 ◽  
Vol 120 ◽  
pp. 67-73 ◽  
Author(s):  
Chad A. Keyser ◽  
Éverton K.K. Fernandes ◽  
Drauzio E.N. Rangel ◽  
Donald W. Roberts
Keyword(s):  
Growth Delay ◽  
Stress Growth ◽  
Biocontrol Efficacy ◽  
Biological Trait ◽  
Post Stress

scholarly journals PRODUCTION OF SATIN FLOWER POTTED PLANTS FROM CUTTINGS

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 865a-865
Author(s):  
Gwendolyn Hartley ◽  
Robert G. Anderson
Keyword(s):  
Flower Color ◽  
High Light ◽  
Flowering Plant ◽  
Cool Temperature ◽  
Ambient Light ◽  
Flower Buds ◽  
Potted Plants ◽  
Terminal Flower ◽  
Lateral Branches ◽  
Primary Stem

Satin flower (Clarkia amoena subsp. whitneyi; syn. Godetia whitneyi) is a cool temperature, high light plant used as a cutflower in Japan, Europe and California. The stiking flower color patterns, large, long-lasting flowers and branching pattern could make this plant an important potted flowering plant. Cuttings, 6-8 cm long with flower buds (0.5-2.0 cm long), were harvested from secondary and tertiary stems of field-grown pinched plants of `Grace Red'. Cuttings were rooted in intermittent mist and potted in 10 cm pots two weeks later. The terminal flower buds and stem tip were removed one week later and the plants flowered within 4 weeks with 4-6 equal lateral branches. In the fall, `Grace Rose Pink' seed was sown Oct. 4, 1989, plants were grown under 100 umole s-1 cm-2 HPS 18 hr. supplemental light. Cuttings from the primary stem were harvested at the same stage, rooted in two weeks, potted and pinched one week later. Cuttings grown under supplemental light flowered 4 weeks later while cuttings grown under ambient light flowered over 10 weeks later. Over 70% of the terminal cuttings in supplemental light were 22-30 cm tall with 4-6 equal lateral branches that flowered uniformly.

scholarly journals “TIFBLUE' BLUEBERRY BUDBREAK BY H2CN2 AT DIFFERENT DORMANCY STAGES

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 689d-689
Author(s):  
M.R. Mohd. Saad ◽  
Russell L. Weiser
Keyword(s):  
Hot Water ◽  
Distilled Water ◽  
Flower Buds ◽  
Growth Season ◽  
Vaccinium Ashei ◽  
Hydrogen Cyanamide ◽  
Chilling Temperatures

`Tifblue' Blueberries (Vaccinium ashei) have poor or delayed budbreak in warm growing regions due to a lack of chilling temperatures. Hydrogen cyanamide(H2CN2) is known to break dormancy in buds. We tested the response of `Tifblue' blueberry buds to concentrations of hydrogen cyanamide at different dormancy stages with respect to budbreak and phytotoxicity. Blueberry bud sticks were harvested during the growth season at three week intervals. H2CN2 (0.05, 0.125, 0.25, 0.5 M), hot water (47C) and a control (distilled water at 0C) were used. Treated bud sticks were forced to break under light at 18-26C. Flower and leaf buds broke after 10-14 days. H2CN2 above 0.25 M was highly phytotoxic to flower buds, but not leaf buds. H2CN2 at 0.125 M was most effective in breaking flower and leaf buds at all dormancy stages. ABA and polyamine levels in buds shall be analyzed.

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