LEAF SENESCENCE OF EASTER LILY AS INFLUENCED BY ROOT/SHOOT GROWTH, PHOSPHORUS NUTRITION AND ANCYMIDOL

1979 ◽  
Vol 59 (3) ◽  
pp. 757-761 ◽  
Author(s):  
M. J. TSUJITA ◽  
D. P. MURR ◽  
GAIL JOHNSON
Keyword(s):  
Plant Height ◽  
Leaf Senescence ◽  
Shoot Growth ◽  
Phosphorus Content ◽  
Foliar Spray ◽  
Lilium Longiflorum ◽  
Dry Weight ◽  
Phosphorus Nutrition ◽  
Easter Lily ◽  
Delayed Flowering

The effect of ancymidol (A-Rest) applications and phosphorus nutrition on shoot and root growth and the development of lower leaf senescence in Easter lilies (Lilium longiflorum Thunb.) was examined. Ancymidol delayed flowering in the first but not in the second experiment. Bud count was not affected by application method of ancymidol. Plant height and shoot and root dry weight were reduced with 0.25 and 0.50 mg/15 cm pot ancymidol concentrations. Leaf senescence was increased by ancymidol, the effects of drench application being more severe than those of the foliar spray treatment. The phosphorus content of leaves and roots was not influenced by ancymidol. Phosphorus nutrition did not affect flowering, bud count or plant height but significantly affected dry weight and phosphorus content of roots and shoots. In the second experiment leaf senescence was reduced by high applications of phosphorus.

INFLUENCE OF PHOSPHORUS NUTRITION AND ANCYMIDOL ON LEAF SENESCENCE AND GROWTH OF EASTER LILY

1978 ◽  
Vol 58 (1) ◽  
pp. 287-290 ◽  
Author(s):  
M. J. TSUJITA ◽  
D. P. MURR ◽  
A. G. JOHNSON
Keyword(s):  
Plant Growth ◽  
Leaf Senescence ◽  
Lilium Longiflorum ◽  
Phosphorus Nutrition ◽  
Total Chlorophyll ◽  
High Phosphorus ◽  
Easter Lily ◽  
Low Phosphorus

Severity of lower foliage senescence of Easter lilies (Lilium longiflorum Thunb.) was increased in response to application of ancymidol (A-Rest) in combination with low phosphorus nutrition. Leaf senescence in lilies could be related to a reduced foliar content of phosphorus and total chlorophyll. Plant growth was significantly retarded by high rates of A-Rest. Maintaining high phosphorus nutrition lessened the severity of leaf senescence but partially overcame the effect of A-Rest on growth.

scholarly journals EFFECT OF PREPLANT BULB SOAK WITH UNICONAZOLE ON GROWTH AND DEVELOPMENT OF EASTER LILY

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1144e-1144
Author(s):  
Gary J. Wilfret
Keyword(s):  
Plant Growth ◽  
Flowering Time ◽  
Plant Height ◽  
Flower Development ◽  
Growth And Development ◽  
Lilium Longiflorum ◽  
Floral Buds ◽  
Easter Lily ◽  
Delayed Flowering

Plant growth and flower development of Easter lilies (Lilium longiflorum) were evaluated for 3 years (1988-90). Bulbs of cvs. Ace and Nellie White were soaked preplant in solutions of uniconazole at cones. of 0 to 5 ppm at durations of 1 to 5 minutes and compared to bulbs soaked in ancymidol at 5 to 40 ppm. Time of bulb soak had no effect on amount of solution absorbed and on growth and flower development. Plant height from bulbs soaked in water alone was variable among the 3 years, ranging from 56 to 70 cm for Nellie White and 55 to 89 cm for Ace. Ancymidol concs. of 5, 10, 20, and 40 ppm retarded plant height 10.8, 14.5, 33.8, and 46.2%, respectively. Uniconazole solutions at 0.625, 1.25, 2.5, 5, 10, and 20 ppm produced Nellie White plants 16.7, 70.4, 56.8, 46.9, 39.3, and 30.8% of the height of the water soaked bulbs, respectively. Response of Ace to similar uniconazole concentrations was slightly less. High uniconazole concentration (> 5 ppm) delayed flowering time and reduced the number of floral buds which developed. Variability among plants within uniconazole treatments was large and would not be acceptable commercially.

scholarly journals Far-red at End of Day and Reduced Irradiance Affect Plant Height of Easter and Asiatic Hybrid Lilies

HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 1009-1012 ◽  
Author(s):  
T.J. Blom ◽  
M.J. Tsujita ◽  
G.L. Roberts
Keyword(s):  
Plant Height ◽  
Lilium Longiflorum ◽  
Dry Weight ◽  
Low Intensity ◽  
Easter Lily ◽  
Red Radiation

Potted bulbs of Lilium longiflorum Thunb. `Ace' and `Nellie White' and Lilium (Asiatic hybrid) `Enchantment' were grown in a greenhouse under ambient photoperiod (APP), 8-h photoperiod by removing twilight from ambient by blackout cloth (8PP), or 8PP extended with 1 hour of low-intensity far-red radiation (9PP). Height of `Ace', `Nellie White', and `Enchantment' increased by 24%, 18%, and 12%, respectively, under APP and by 118%, 100%, and 44%, respectively, under 9PP compared to 8PP. In a second experiment, the effects of reduced irradiance (0%, 25%, 50%, and 75% shade) were determined on the same cultivars grown under APP or 8PP. The effects of APP on height were similar in magnitude for `Ace' and `Nellie White' but were insignificant for `Enchantment' compared to 8PP. Shading increased height linearly for all cultivars. The regression was greater under APP (2.8 mm/percent shade) than under 8PP (1.8 mm/percent shade) for `Ace' and `Nellie White' combined. Plant height of `Enchantment' was less affected by reduced irradiance. For all cultivars, APP or 9PP produced higher stem dry weight compared to 8PP. Shading decreased leaf and bulb dry weight of the Easter lily cultivars.

HEIGHT CONTROL OF POT CHRYSANTHEMUMS WITH PRE- AND POST-PLANT TREATMENTS OF DAMINOZIDE AND UNICONAZOLE

1990 ◽  
Vol 70 (3) ◽  
pp. 925-930 ◽  
Author(s):  
PETER R. HICKLENTON
Keyword(s):  
Plant Height ◽  
Foliar Spray ◽  
Dry Weight ◽  
Chrysanthemum Morifolium ◽  
Growth Retardants ◽  
Dendranthema Grandiflora ◽  
Height Control ◽  
Shoot Dry Weight ◽  
Butanedioic Acid ◽  
Higher Doses

This study investigated the effects of growth retardants uniconazole [(E) - (p-chlorohenyl) -4, 4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol] and daminozide (butanedioic acid mono 2,2-dimethylhydrazide) on three chrysanthemum (Dendranthema grandiflora Tzvelev.) cultivars. Uniconazole applied as a soil drench (0.02 mg a.i. pot−1) or foliar spray (0.014 mg a.i. pot−1) 10 d after removal of the shoot tip reduced plant height at harvest in cultivars Deep Luv, Tip and Tara. Higher doses of uniconazole resulted in further plant height reduction in Tip and Tara but not in Deep Luv. Daminozide spray (14 mg a.i. pot) and uniconazole spray (0.028 or 0.056 mg a.i. pot−1) produced plants of similar height. Pre-plant dips of both growth retardants were less effective than sprays or drenches in controlling height. Flower area and flower dry weight were reduced with uniconazole drench and spray, and daminozide spray in each cultivar. Shoot dry weight was similarly affected in Tip and Tara but not in Deep Luv. Flowering was delayed in each cultivar by post-plant treatments of uniconazole drench and spray and by daminozide spray (0.08, 0.014 and 14 mg a.i. pot−1, respectively), and by daminozide and uniconazole pre-plant dips (5.0 mg L−1 and 4000 mg L−1, respectively).Key words: Sumagic, XE-1019, B-Nine, Alar, Chrysanthemum × morifolium, Dendanthema grandiflora

The growth of lodgepole pine seedlings raised under clear polythene cloches at five seedbed densities

1980 ◽  
Vol 10 (3) ◽  
pp. 426-428
Author(s):  
S. Thompson
Keyword(s):  
Plant Height ◽  
Dry Matter ◽  
Shoot Growth ◽  
Lodgepole Pine ◽  
Unit Length ◽  
Dry Weight ◽  
Dry Matter Production ◽  
Matter Production ◽  
Pine Seedlings ◽  
Foliage Weight

The components of shoot growth and dry matter production in 1 + 0 lodgepole pine (Pinuscontorta Dougl. ex Loud. spp. contorta) seedlings raised under clear polythene cloches for 12 weeks at five seedbed densities (180–720 plants/m2) were studied. The greater plant height found at the highest seedbed density was the result of increased stem unit length, not increased number of stem units. The increase in plant dry weight as seedbed density decreased was largely due to greater dry weight of roots, branchwood, and branch foliage, and not to increases in stemwood and stem foliage weight. Seedbed densities of less than 460 seedlings/m2 are required to produce yields of suitably sturdy seedlings in excess of 50% of the crop.

scholarly journals PHYSIOLOGICAL CHANGES ASSOCIATED WITH LEAF SENESCENCE IN EASTER LILIES

HortScience ◽  
1995 ◽  
Vol 30 (2) ◽  
pp. 189a-189
Author(s):  
Rosanne E. Franco ◽  
Susan S. Han
Keyword(s):  
Gibberellic Acid ◽  
Leaf Senescence ◽  
Growth Regulators ◽  
Cold Storage ◽  
Foliar Application ◽  
Lilium Longiflorum ◽  
Continuous Treatment ◽  
Physiological Effects ◽  
Easter Lily ◽  
The Individual

Senescence of lower leaves of Easter lilies (Lilium longiflorum Thunb.) was previously shown to be delayed with application of the growth regulators, gibberellic acid (GA3) and benzyladenine (BA). This study was done to determine the physiological effects of GA3 and BA in relation to the delay of leaf senescence. Foliar application with 500 ppm BA or GA3 delayed chlorosis and lowered respiration rate in Easter lily leaves. A combination of 500 ppm BA and 500 ppm GA3 was more effective than the individual application of each. Gibberellic acid, BA, or their combination before cold storage resulted in delayed chlorosis and lowered respiration following removal from cold storage. Treatment with growth regulators after cold storage was less effective. Senescence of leaves was not associated with ethylene since ethylene production by leaves was undetectable by gas chromatograph. In addition, pulsing or continuous treatment with silver thiosulphate (STS), an inhibitor of ethylene synthesis, did not delay foliar chlorosis. Analysis of carbohydrate levels in Easter lily leaves treated with GA3, BA, or their combination may contribute to the understanding of the physiological effects of these two growth regulators.

scholarly journals Response of Kientzler New Guinea Impatiens to Manual and Chemical Pinching

HortScience ◽  
1991 ◽  
Vol 26 (7) ◽  
pp. 856-857 ◽  
Author(s):  
Terri Woods Starman
Keyword(s):  
Plant Height ◽  
Shoot Apex ◽  
New Guinea ◽  
Dry Weight ◽  
Plant Size ◽  
Flowering Plant ◽  
Potted Plants ◽  
Delayed Flowering ◽  
New Guinea Impatiens

Manually and chemically pinched plants of 18 cultivars of Impatiens hybrids (Kientzler New Guinea impatiens) were compared to control plants to determine the effect of shoot apex removal on flowering, plant size, and branching characteristics. Either pinching treatment delayed flowering by ≈3 days compared with nonpinched controls. Pinching had no effect on plant height or fresh or dry weight. Plant diameter and form changes due to pinching depended on cultivar. Total branch count was increased by chemical but not manual pinching although both pinching methods affected mode of branching. The 18 cultivars of Kientzler New Guinea impatiens were best grown as 0.4-liter potted plants without the aid of pinching.

scholarly journals Interaction of Shoot Emergence Date and Long Days after Controlled-temperature forcing of `Nellie White' Easter Lilies

1993 ◽  
Vol 118 (6) ◽  
pp. 741-746
Author(s):  
John M. Dole
Keyword(s):  
Plant Height ◽  
Lilium Longiflorum ◽  
Emergence Time ◽  
Easter Lily ◽  
Emergence Date ◽  
Shoot Emergence

`Nellie White' Easter lily bulbs (Lilium longiflorum Thunb.) were given 6 weeks of 5.5C, placed in the greenhouse, and divided into groups based on number of days to emergence: 0 to 6, 7 to 13, 14 to 20, or 21 to 27 days. At emergence, the shoots received 0, 1, 2, or 3 weeks of long days (LDs). The experiment was repeated for 3 consecutive years. Late-emerging plants had fewer days from emergence to visible bud and anthesis than early-emerging plants. Consequently, late-emerging plants flowered within 3 to 11 days of early emerging plants despite 16 to 22 days difference in emergence time. Late-emerging plants were tallest, while plants emerging in the second week had the most leaves. Flower count was not influenced by emergence date in Year 1. In Year 2, flower count decreased curvilinearly with later emergence. In Year 3, flower count was highest in plants emerging in the second week and lowest in the last week. Increasing LDs decreased the number of days from emergence to visible bud and anthesis but increased plant height. LDs did not affect leaf count in any year or flower count in Years 1 and 2. In Year 3, flower count increased with increasing weeks of LDs. LD × emergence date interactions existed, but varied from year to year.

scholarly journals Production and Postproduction Performance of Uniconazole-Treated Bedding Plants

1991 ◽  
Vol 9 (4) ◽  
pp. 203-206
Author(s):  
Gary J. Keever ◽  
William J. Foster
Keyword(s):  
Drought Stress ◽  
Plant Height ◽  
Vegetative Growth ◽  
Foliar Spray ◽  
Dry Weight ◽  
Tagetes Erecta ◽  
Stress Evaluation ◽  
Bedding Plants ◽  
Shoot Dry Weight ◽  
Tagetes Erecta L

Abstract Growth and flowering responses of Pelargonium × hortorum L. H. Bailey ‘Ringo Deep Scarlet’, Tagetes erecta L. ‘Inca Orange’, Viola × wittrockiana Gams. ‘Blue Shades’, Impatiens × ‘Zenith’ and Salvia farinacea Benth. ‘Victoria Blue’ to uniconazole applied at the seedling stage were evaluated at the end of production and 5 to 7 weeks after transplanting into the landscape (geranium, impatiens and salvia only). A drought stress evaluation was also conducted. Response to uniconazole varied with species, sampling date and uniconazole concentration. Growth of all species was suppressed when measured 4½ to 8½ weeks after treatment (WAT), and stress tolerance of all species except marigold increased with increasing concentrations of uniconazole. Flowering generally was delayed with uniconazole. Impatiens and geranium treated with 10 ppm or less of uniconazole were similar in height to nontreated plants 5 to 7 weeks after being transplanted; at this time, uniconazole had no effect on plant height or shoot dry weight of salvia. Daminozide applied once as a 5000 ppm foliar spray was not effective in suppressing vegetative growth of any of the tested species.

scholarly journals Forcing Characteristics of Easter Lily Bulbs Exposed to Elevated-ethylene and -carbon Dioxide and Low-oxygen Atmospheres

1991 ◽  
Vol 116 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Timothy A. Prince ◽  
Maria S. Cunningham
Keyword(s):  
Carbon Dioxide ◽  
Lilium Longiflorum ◽  
Low Oxygen ◽  
Flower Buds ◽  
Easter Lily ◽  
Delayed Flowering ◽  
Shoot Emergence ◽  
Plant Exposure

Exposure of bulbs of Easter Lily (Lilium longiflorum Thunb.) to a maximum of 2 μl ethylene/liter during vernalization delayed flowering by 5 to 7 days and decreased the number of flower buds. Ethylene exposure for 5 days at 21C after vernalization accelerated shoot emergence and flowering by up to 3 days. No floral or plant abnormalities were observed after bulb exposure to ethylene. Exposure to atmospheres with 0%, 0.5%, or 1% O2 at 21C for up to 2 weeks before or 10 days after vernalization did not “significantly impair subsequent bulb forcing. Storage in 1% 02 at 21C for 1 week before vernalization resulted in nearly one additional secondary bud initiated per plant. Exposure to up to 15% CO2 at 21C for up to 2 weeks before or 10 days after vernalization did not significantly impair subsequent forcing.

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