Effect of growth regulators, girdling, and mulching on flowering of young European and Japanese larches under field conditions

1982 ◽  
Vol 12 (2) ◽  
pp. 270-279 ◽  
Author(s):  
Marc Bonnet-Masimbert
Keyword(s):  
Surfactant Solution ◽  
Hormone Treatment ◽  
Naphthalene Acetic Acid ◽  
Plastic Film ◽  
Old Field ◽  
Male And Female ◽  
Adjunct Treatment ◽  
Seed Cone ◽  
Female Flowering ◽  
Effective Adjunct

Two experiments were undertaken in 1977 and 1979 to promote flowering of 5- and 7-ycar-old field-grown seedlings of Larixleptolepis Gord. and L. decidua Mill. A gibbcrellin A4/7 mixture (GA4/7) was applied alone or in combination with GA3 and naphthalene acetic acid (NAA) to both girdled and nongirdled trees or branches by two methods, perfusion into the xylem and spraying with an aqueous cationic surfactant solution. Perfusion was most effective, especially on girdled branches, although spraying was reasonably effective for male flowering in L. decidua. Only GA4/7 alone significantly increased flowering. Male flowering was doubled and female flowering increased eightfold by GA4/7 in the best treatments, over all application dates. Generally, male flowering doubled and female flowering increased eightfold by GA4/7. Even more flowering was obtained at optimal application dates. May and June applications were best, especially for treatments associated with girdling. However, some flowering occurred with applications as late as August and September. More strobili of both sexes develop in the upper crown. However GA4/7 treatment induced seed cone buds to appear in the lower crown, an abnormal location. An unusual effect occurred in that a positive flowering response of the 1977 experiment occurred only in 1979, whereas the 1979 experiment yielded enhanced flowering in 1980. Soil mulching with a plastic film, with or without hormone treatment, was a very effective adjunct treatment for both male and female flowering.

Promotion of cone and seed production in grafted and seedling Douglas-fir seed orchards by application of gibberellin A4/7 mixture

1980 ◽  
Vol 10 (4) ◽  
pp. 464-469 ◽  
Author(s):  
Stephen D. Ross ◽  
Richard P. Pharis ◽  
J. C. Heaman
Keyword(s):  
Seed Production ◽  
Seed Set ◽  
Douglas Fir ◽  
Adjunct Treatment ◽  
Seed Cone ◽  
Marked Enhancement ◽  
Napthaleneacetic Acid ◽  
Low Levels ◽  
Effective Adjunct ◽  
Filled Seeds

Both 4-year-old grafts and 6-year-old seedlings of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) were induced to flower, and the production of seed cones and filled seeds was significantly enhanced by branch applications of gibberellin A4/7 (GA4/7) mixture.For 6-year-old seedlings, when pooled over all levels of the auxin, napthaleneacetic acid (NAA), seed cone bud differentiation, and number of filled seeds per treatment branch tended to be enhanced by GA3, GA5, and GA9, relative to controls. A more marked enhancement (although still not significant) in number of filled seeds per treatment branch was noted for GA3, GA5, and GA9 when applied in combination with GA4/7, relative to GA4/7 alone. The combination of GA9 + GA4/7 significantly increased the number of seed cone buds differentiated, relative to GA4/7 alone. Low levels of NAA, pooled over all GA treatments, significantly increased the number of seed cones per branch at maturity, and tended to increase both the number of seed cone buds differentiated and filled seeds per branch.Girdling, an effective adjunct treatment for promoting flowering, reduced filled seeds per cone for grafts, but had no effect on seedlings. Neither cone abortion nor seed set was affected by the hormone treatments, although there was a tendency in the seedlings for NAA to reduce cone abortion and increase filled seeds per cone. Seed from GA-induced cones germinated equally as well as that from controls. For grafts, GA treatments resulted in a 500% increase in per-branch yield of filled seeds; for seedlings, increases of 250 to 600% were noted.

scholarly journals Lower-Dose, Intravenous Chlorothiazide Is an Effective Adjunct Diuretic to Furosemide Following Pediatric Cardiac Surgery

2020 ◽  
Vol 25 (1) ◽  
pp. 31-38
Author(s):  
Ryan J. Carpenter ◽  
Shaghig Kouyoumjian ◽  
David Y. Moromisato ◽  
Phuong Lieu ◽  
Rambod Amirnovin
Keyword(s):  
Fluid Balance ◽  
Urine Output ◽  
Heart Defects ◽  
High Dose ◽  
Total Fluid Intake ◽  
Adjunct Treatment ◽  
Negative Fluid Balance ◽  
Poor Outcomes ◽  
Neonates And Infants ◽  
Effective Adjunct

OBJECTIVES Postoperative fluid overload is ubiquitous in neonates and infants following operative intervention for congenital heart defects; ineffective diuresis is associated with poor outcomes. Diuresis with furosemide is widely used, yet there is often resistance at higher doses. In theory, furosemide resistance may be overcome with chlorothiazide; however, its efficacy is unclear, especially in lower doses and in this population. We hypothesized the addition of lower-dose, intravenous chlorothiazide following surgery in patients on high-dose furosemide would induce meaningful diuresis with minimal side effects. METHODS This was a retrospective, cohort study. Postoperative infants younger than 6 months, receiving high-dose furosemide, and given lower-dose chlorothiazide (1–2 mg/kg every 6–12 hours) were identified. Diuretic doses, urine output, fluid balance, vasoactive-inotropic scores, total fluid intake, and electrolyte levels were recorded. RESULTS There were 73 patients included. The addition of lower-dose chlorothiazide was associated with a significant increase in urine output (3.8 ± 0.18 vs 5.6 ± 0.27 mL/kg/hr, p < 0.001), more negative fluid balance (16.1 ± 4.2 vs −25.0 ± 6.3 mL/kg/day, p < 0.001), and marginal changes in electrolytes. Multivariate analysis was performed, demonstrating that increased urine output and more negative fluid balance were independently associated with addition of chlorothiazide. Subgroup analysis of 21 patients without a change in furosemide dose demonstrated the addition of chlorothiazide significantly increased urine output (p = 0.03) and reduced fluid balance (p < 0.01), further validating the adjunct effects of chlorothiazide. CONCLUSION Lower-dose, intravenous chlorothiazide is an effective adjunct treatment in postoperative neonates and infants younger than 6 months following cardiothoracic surgery.

scholarly journals Adjunct Treatment of Recalcitrant Hand Plaques in Nephrogenic Systemic Fibrosis After Imatinib Therapy

2019 ◽  
Vol 3 (6) ◽  
pp. 438-442
Author(s):  
James Foshee ◽  
Thomas Griffin ◽  
Kristin Cam ◽  
Michael Rivlin ◽  
Matthew Keller
Keyword(s):  
Nephrogenic Systemic Fibrosis ◽  
Functional Limitation ◽  
Lower Extremities ◽  
Functional Improvement ◽  
Adjunct Treatment ◽  
Joint Contractures ◽  
Intralesional Corticosteroid ◽  
Initial Improvement ◽  
Effective Adjunct ◽  
Corticosteroid Injections

Nephrogenic systemic fibrosis (NSF) is a sclerotic disorder presenting with painful indurated plaques and skin thickening involving the trunk and extremities, which can lead to tethering and joint contractures.  NSF most commonly affects patients with renal insufficiency who have been exposed to gadolinium. We present a case of NSF involving the bilateral hands, knees, and lower extremities developing over 10 years after gadolinium exposure.  Initial improvement was noted in the lower extremities after initiation of imatinib mesylate therapy, but recalcitrant, thickened hand plaques caused persistent pain and functional limitation. Adjunct intralesional corticosteroid injections produced durable softening of the recalcitrant lesions with considerable functional improvement in hand mobility. Based on our experience, intralesional corticosteroid injections appear to be an effective adjunct treatment in patients with incomplete response to anti-fibrotic therapies.

scholarly journals Flowering phenology of Catopsis compacta (Bromeliaceae), a dioecious epiphyte in an oak forest

2016 ◽  
Vol 94 (4) ◽  
pp. 736
Author(s):  
Jeanett Escobedo-Sarti ◽  
Demetria Mondragón
Keyword(s):  
Reproductive Success ◽  
Flowering Phenology ◽  
Oak Forest ◽  
Flowering Period ◽  
Sexual System ◽  
Male And Female ◽  
Flowering Synchrony ◽  
Flowering Season ◽  
Female Flowering ◽  
One Year

<p><strong>Background:</strong> Knowledge of the flowering phenology of species with an epiphytic habit and a dioecious sexual system is scarce.</p><p><strong>Questions:</strong> We studied the flowering phenology of a population of the dioecious epiphytic bromeliad, <em>Catopsis</em> <em>compacta</em>, in an oak forest in Oaxaca, Mexico, to answer the following questions: 1) what type of flowering period is exhibited by this population of <em>C. compacta</em>? 2) what is the degree of synchrony between the male and female flowering periods? and 3) what is the flowering synchrony index of the population?</p><p><strong>Methods:</strong> In February 2006, in a 20 m × 20 m plot, we marked and measured 151 individuals of <em>C. compacta</em> ≥ 10 cm in height (minimum reproductive size). We recorded the number of flowers and fruits present in each individual every month for one year.</p><p><strong>Results:</strong> Our results showed that the flowering period in both sexes lasted for three months (May–July). Only 23 marked individuals flowered (15.23 %): of these 12 (52.17 %) were female and 11 (47.83 %) were male. The index of synchrony between females and males was 0.958 ± 0.013 and the flowering synchrony index of the population was 0.833 ± 0.189.</p><p><strong>Conclusions:</strong> The high flowering synchrony between the sexes, together with a flowering season that coincided with the period of highest rainfall when the number of arthropods (potential pollinators) is the highest, could favor breeding and, therefore, reproductive success.</p>

Transgenerational effect of a single neonatal benzpyrene treatment (imprinting) on the sexual behavior of adult female rats

1997 ◽  
Vol 16 (10) ◽  
pp. 553-556 ◽  
Author(s):  
G. Csaba ◽  
Cs Karabélyos
Keyword(s):  
Sexual Behavior ◽  
Behavioral Effect ◽  
Hormone Treatment ◽  
Treated Group ◽  
Female Rats ◽  
Transgenerational Effect ◽  
Male And Female ◽  
Moderate Reduction ◽  
Male And Female Rats ◽  
Group A

Male and female rats were neonatally treated with a single dose of benzpyrene. The adult animals were mated inter se, forming control-control, benzpyrene (female)-control, benzpyrene (male)-control, and benzpyrene-benzpyrene treated couples. In the F 1 and F2 generations (without any further treatment) the females's sexual behavior was tested to Meyerson index and lordosis quotient after ovariectomy and hormone treatment, using experienced males. In the F1 generation both indices were significantly reduced in the maternally treated, paternally untreated groups, however this reduction was not present in the group where the treatment was maternal and paternal alike. In the F2 generation, beside the more expressed reduction in the grandmaternally treated group, a moderate reduction in the sexual activity of progenies having treated grandfather or two treated grandparents were observed. The experiment call attention to the transgenerational sexual behavioral effect of a dangerous environment pollutant, benzpyrene.

Mating system variation among individual ramets in a Douglas-fir seed orchard

1990 ◽  
Vol 20 (10) ◽  
pp. 1672-1675 ◽  
Author(s):  
V. J. Erickson ◽  
W. T. Adams
Keyword(s):  
Mating System ◽  
Seed Orchard ◽  
Floral Biology ◽  
Douglas Fir ◽  
Pollen Production ◽  
Male And Female ◽  
Floral Phenology ◽  
Female Flowering ◽  
High Degree

Proportions of outcrossed progeny (ti) in five ramets of five clones with variable floral phenology and pollen production were investigated in a Douglas-fir (Pseudotsugamenziesii var. menziesii (Mirb.) Franco) seed orchard. Estimates of ti[Formula: see text] were significantly heterogeneous among the five ramets, ranging in value from 0.50 to 1.07. Variation in [Formula: see text] corresponded well with variation among ramets in floral biology. Ramets that flowered much earlier than other individuals in the orchard and (or) had a high degree of synchrony in timing of male and female flowering produced the lowest [Formula: see text].

Conservation biology of two endemic Beyeria species (Euphorbiaceae) from southern Western Australia

2015 ◽  
Vol 63 (6) ◽  
pp. 484 ◽  
Author(s):  
Brian J. Vincent ◽  
Sarah Barrett ◽  
Anne Cochrane ◽  
Julie A. Plummer ◽  
Michael Renton
Keyword(s):  
Life History ◽  
Western Australia ◽  
Seed Viability ◽  
Ex Situ ◽  
Life History Strategies ◽  
Reproductive Phenology ◽  
Habitat Specificity ◽  
Male And Female ◽  
Female Flowering ◽  
Threatening Processes

Beyeria cockertonii Halford & R.J.F.Hend. and Beyeria villosa Halford & R.J.F.Hend. (Euphorbiaceae) are two short-range endemic monoecious congeners from southern Western Australia. We sought to determine whether life-history characteristics were responsible for their limited distribution and to identify aspects of their ecology that might render them vulnerable to current threatening processes. We investigated reproductive phenology in relation to climate, pollinator activity and synchronicity of male and female flowering. In addition seed dispersal, regeneration, demography and seed viability were examined and ex situ germination experiments conducted to determine seed-dormancy mechanisms. Flowering in the conservation-listed B. cockertonii was significantly correlated with temperature, whereas fruit set was correlated with pollinator abundance and movement; male and female flowering showed limited synchrony. The presence of soil-stored seeds lacking a caruncle at sites absent of adult plants of either species suggests that seed may be ant-dispersed (myrmecochory). Fresh seeds of B. cockertonii were significantly more viable than those of its more common congener, B. villosa (72 vs 0.5%, P < 0.001). Fresh B. cockertonii seeds would not germinate with an intact caruncle; caruncle removal elicited germination of 64% and 60% (10°C and 15°C, respectively). Aqueous smoke further stimulated germination to 72% and 83% germination (10°C and 15°C, respectively), providing a link between fire and germination. Beyeria villosa was affected by high levels of pre-dispersal predation (up to 70%) and seed abortion (88%) and appeared to have lower reproductive fitness than B. cockertonii. Life-history strategies did not explain the greater abundance and wider distribution of B. villosa than those of the conservation-listed B cockertonii, nor was the greater rarity of B. cockertonii fully explained by habitat specificity, with both species being restricted to ultra-mafic volcanic rock associated with Achaean greenstone. However, an apparent dependence of B. cockertonii on a specific insect pollinator from the family Miridae may render this species vulnerable to threatening processes.

Promotion of cone and seed production in rooted ramets and seedlings of western hemlock by gibberellins and adjunct cultural treatments

1981 ◽  
Vol 11 (1) ◽  
pp. 90-98 ◽  
Author(s):  
Stephen D. Ross ◽  
Richard F. Piesch ◽  
Franklin T. Portlock
Keyword(s):  
Water Stress ◽  
Seed Production ◽  
Calcium Nitrate ◽  
Flower Induction ◽  
Western Hemlock ◽  
Male And Female ◽  
Foliar Sprays ◽  
Female Flowering ◽  
Sexually Mature ◽  
Nitrate Fertilization

Over 100-fold increases in numbers of seed cones and 6- to 24-fold increases in pollen cones were achieved for 7- and 8-year-old rooted ramets of sexually mature western hemlock (Tsugaheterophylla (Raf.) Sarg.) from stem injections of gibberellin A4/7 (GA4/7) mixtures and calcium nitrate fertilization. Female, but not male, flowering was also promoted significantly in nitrate-fertilized 6-year-old seedlings, both by stem injections (47% flowering) and foliar sprays (40% flowering) of GA4/7. Flower induction in 3-year-old potted seedlings required water stress in addition to GA4/7 foliar sprays (30% initiated seed cones and 7% pollen cones). The cones produced developed normally and set sound seeds. For mature ramets, flower promotion was roughly proportional to the logarithm of GA4/7 + GA9 concentration from 25 to 400 mg•L−1; calcium nitrate fertilization, though ineffective when used alone, significantly enhanced this response. Treatments of 6- and 12-week durations, beginning 24 May, were equally effective in promoting both male and female flowering. However, production of seed cones was only slightly enhanced and that of pollen cones not at all when treatment was delayed until 7 July (6 weeks), indicating the need to start GA applications before cone-bud differentiation has been completed (late June for pollen cones and mid-July for seed cones).

Effects of Spacing, Nitrogen and Hormone Treatment on Pineapple in Swaziland

1968 ◽  
Vol 4 (2) ◽  
pp. 103-115 ◽  
Author(s):  
P. G. C. Dodson
Keyword(s):  
Nitrogen Fertilization ◽  
Fruit Set ◽  
Fruit Size ◽  
Hormone Treatment ◽  
Fruit Shape ◽  
Naphthalene Acetic Acid ◽  
Depressing Effect ◽  
Plant Populations ◽  
Nitrogen Levels ◽  
Fruit Acidity

SummaryPlant populations, nitrogen levels and the use of alpha naphthalene acetic acid (ANA) to rein-force natural flower differentiation were compared in a field experiment at Malkerns in the Swaziland Middleveld. Yield was raised by increasing plant population above 17,000 plants per acre, but reached a maximum at 23,000 plants per acre. Increased yield from denser planting occurred at the expense of fruit size and fruit set, and of sucker and slip production. Hormone counteracted the depressing effect of denser planting on fruit set and denser planting reduced sunburn damage and raised fruit acidity. 400 lb N per acre per crop increased yield over 200 lb N by increasing fruit size in the mother crop, and by increasing fruit size and set in the ratoon. Added nitrogen markedly reduced fruit acidity. ANA improved fruit set and therefore yield, without detrimental effects on fruit shape or quality. There are grounds for small increases in population above 17,000 plants per acre, for the use of ANA to reinforce natural flower differentiation and for the cautious use of the higher level of nitrogen fertilization.

scholarly journals Combining ability and heterosis for yield, precocity and height in yellow maize genotypes

2020 ◽  
Vol 37 (4) ◽  
pp. 410-429
Author(s):  
Victor Mario García Mora ◽  
Julián Chura Chuquija ◽  
Julio Torres
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Inbred Lines ◽  
Male And Female ◽  
Lattice Design ◽  
Maize Genotypes ◽  
Ear Height ◽  
Female Flowering ◽  
The Mean ◽  
Additive Genes

The objective of the present study was to determine the general combinatorial aptitude (GCA), specific combinatorial aptitude (SCA) and heterosis in inbred lines of yellow maize and its crosses for, the yield of grain, height of plant and ear and days to male and female flowering. Six inbred lines from CIMMYT, their direct crosses and four controls were evaluated at UNALM during 2016-2018, under a 5 x 5 lattice design with four repetitions. The effects of GCA and SCA were calculated using method II, model I of Griffing. Heterosis was measured based on the mean and best parent. Heterosis was measured based on the mean and best parent. The combined analysis of years showed significance (p ≤ 0.01) in: genotypes by years for days to male and female flowering; GCA for years for days to male flowering and SCA for years for days to female flowering. The effects of ACG for grain yield were significant in lines CML 229 and CML 428, for plant height, precocity, ear and precocity CML 487 line highlighted. The effect of ACE was superior in the cross CML 453 x CML 486 for the grain yield character. Heterosis was higher for the grain yield in the CML 229 x CML 453 and CML 453 x CML 487 crosses. The GCA / SCA relationship evidenced effects of additive genes on plant height, days to male and female flowering, therefore, for grain yield and ear height, non-additive effects governed.

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