scholarly journals Inhibitory Effect of Abscisic Acid on Shoot Growth and Flowering Induced by Gibberellic Acid in Nonprecooled Derooted Bulbs of Tulip (Tulipa gesneriana L.)

10.5109/24302 ◽  
1999 ◽  
Vol 44 (1/2) ◽  
pp. 25-32
Author(s):  
Marian Saniewski ◽  
Ludwika Kawa-Miszczak ◽  
Elzbieta Wegrzynowicz-Lesiak ◽  
Hiroshi Okubo
Keyword(s):  
Abscisic Acid ◽  
Gibberellic Acid ◽  
Shoot Growth ◽  
Inhibitory Effect ◽  
Tulipa Gesneriana

Dormancy and Root Regeneration of Northern Red Oak

1975 ◽  
Vol 5 (2) ◽  
pp. 176-185 ◽  
Author(s):  
R. E. Farmer Jr
Keyword(s):  
Abscisic Acid ◽  
Gibberellic Acid ◽  
Root Growth ◽  
Shoot Growth ◽  
Starch Content ◽  
Shoot Elongation ◽  
Northern Red Oak ◽  
Root Regeneration ◽  
Physiological Dormancy ◽  
Hydrolysis Of

In a greenhouse forcing study, root regeneration was correlated with shoot growth, which began with increasing rapidity as chilling requirements were met. Root growth was stimulated by factors originating in the stem of both dormant and growing plants, though root regeneration during physiological dormancy was limited. Auxins applied to decapitated plants stimulated root regeneration while inhibiting shoot growth; gibberellic acid, kinetin, ethylene, and abscisic acid had no direct effect upon root regeneration. The starch content of roots averaged 41% during dormancy, and major hydrolysis of starch was dependent upon initiation of shoot elongation.

The effects of paclobutrazol, abscisic acid, and gibberellin on germination and early growth in silver, red, and hybrid maple

2000 ◽  
Vol 30 (4) ◽  
pp. 557-565 ◽  
Author(s):  
John Marshall ◽  
Tannis Beardmore ◽  
Carry Anne Whittle ◽  
Ben Wang ◽  
Robert G Rutledge ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Shoot Growth ◽  
Acer Rubrum ◽  
Inhibitory Effect ◽  
Early Growth ◽  
Red Maple ◽  
Brief Treatment ◽  
Biochemical Method ◽  
Recalcitrant Seed ◽  
Silver Maple

Silver maple (Acer saccharinum L.) seeds were used to examine the mechanisms regulating recalcitrant seed germination aiming towards the development of a biochemical method to temporarily inhibit germination without refrigeration. Treatment of fresh silver maple seeds with the cytochrome P450 inhibitor paclobutrazol delayed germination and reduced root and shoot extension. The inhibitory effect of paclobutrazol plus abscisic acid (ABA) on the shoots of silver maple could not be overcome by a brief treatment with gibberellic acid A3 (GA3). Red maple seeds (Acer rubrum L.) were almost completely inhibited by the treatment with paclobutrazol alone, and this inhibition could not be overcome by a brief treatment with GA3. In the red × silver hybrid, root growth was little affected by paclobutrazol plus ABA; however, shoot growth was markedly inhibited by paclobutrazol, and this inhibition was sharply increased by the combination with ABA but partially alleviated by GA3. Treating fresh silver maple seeds with paclobutrazol for 12 h followed by storage under ideal germination conditions, in the presence of 1 mM ABA, completely prevented germination for 1 week. Root extension was completely restored by the continuous provision of GA3 along with the ABA.

Interaction of gibberellic acid, abscisic acid, and phenolic compounds in the control of hypocotyl growth of Amaranthus caudatus seedlings

1984 ◽  
Vol 62 (10) ◽  
pp. 2047-2052 ◽  
Author(s):  
S. D. Ray ◽  
M. M. Laloraya
Keyword(s):  
Abscisic Acid ◽  
Phenolic Compounds ◽  
Gibberellic Acid ◽  
Growth Inhibitor ◽  
Inhibitory Effect ◽  
Hypocotyl Growth ◽  
Amaranthus Caudatus ◽  
Combined Application ◽  
Growth Promoting ◽  
Potent Growth

Abscisic acid, a potent growth inhibitor, inhibits hypocotyl growth of Amaranthus caudatus (L.) seedlings. Phenolic compounds when applied with ABA (abscisic acid), antagonize ABA action and restore normal seeding growth. GA (gibberellic acid) promotes hypocotyl growth and on combined application with ABA, the ratio of their concentrations determines the course of the resultant growth. This interaction can be modulated by phenolic compounds. Phenolic compounds in low concentrations when present together with GA and ABA favour GA-induced growth by antagonizing the inhibitory effect of ABA. Inhibitory action of abscisic acid on growth is so far known to be counteracted only by growth-promoting hormones. Antagonistic action of phenolic compounds imparts a dual role to this class of compounds, balancing the effect of growth-promoting and growth-inhibiting hormones.

Initiation and morphological development of somatic embryoids from barley cell cultures

1984 ◽  
Vol 62 (6) ◽  
pp. 1245-1249 ◽  
Author(s):  
L. S. Kott ◽  
K. J. Kasha
Keyword(s):  
Somatic Embryogenesis ◽  
Abscisic Acid ◽  
Gibberellic Acid ◽  
Cell Cultures ◽  
Dichlorophenoxyacetic Acid ◽  
Morphological Development ◽  
Low Concentrations ◽  
The Media ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Barley Cell

Somatic embryogenesis was induced in callus previously initiated from immature embryos of barley. These cultures ranged in age from 6 weeks to 30 months. Embryoids were readily initiated from homogenized suspension-grown aggregates when plated on modified B5 media with 2,4-dichlorophenoxyacetic acid. Low concentrations (0.1 and 0.05 mg∙L−1) of abscisic acid promoted further maturation of embryoids, while gibberellic acid (1 mg∙L−1) and kinetin (0.1 mg∙L−1) were used in the media to encourage embryoid germination. The development of somatic embryoids from initiation through maturation and germination is described.

Inhibition of cambial activity in Abies balsamea by internal water stress: role of abscisic acid

1975 ◽  
Vol 53 (24) ◽  
pp. 3041-3050 ◽  
Author(s):  
C. H. A. Little
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Indoleacetic Acid ◽  
Stomatal Closure ◽  
Abies Balsamea ◽  
Cambial Activity ◽  
Inhibitory Effect ◽  
Internal Water ◽  
Endogenous Aba

In experiments with attached and detached shoots of balsam fir, Abies balsamea L., synthetic (±)abscisic acid (ABA) (1) reduced photosynthesis and transpiration by inducing stomatal closure, (2) inhibited indoleacetic acid (IAA) - induced cambial activity in photosynthesizing and non-photosynthesizing shoots, and (3) inhibited the basipetal movement of [14C]IAA. Neither gibberellic acid nor kinetin counteracted the inhibitory effect of (±)ABA on IAA-induced cambial activity. In addition it was demonstrated that increasing the internal water stress increased the level of endogenous ABA in the phloem–cambial region of bark peelings and decreased the basipetal movement of [14C]IAA through branch sections. On the basis of these findings it is proposed that internal water stress inhibits cambial activity, partly through increasing the level of ABA; the ABA acts to decrease the provision of carbohydrates and auxin that are required for cambial growth.

Abscisic acid levels and metabolism in the leaf epidermal tissue of Tulipa gesneriana L. and Commelina communis L.

Planta ◽  
1979 ◽  
Vol 146 (2) ◽  
pp. 135-138 ◽  
Author(s):  
B. N. Singh ◽  
E. Galson ◽  
W. Dashek ◽  
D. C. Walton
Keyword(s):  
Abscisic Acid ◽  
Tulipa Gesneriana ◽  
Epidermal Tissue ◽  
Commelina Communis

scholarly journals Endogenous hormonal content during grain development in hexaploid and tetraploid wheat

1970 ◽  
Vol 33 (3) ◽  
pp. 493-502 ◽  
Author(s):  
Sridhar Gutam ◽  
Virendra Nath ◽  
GC Srivastava
Keyword(s):  
Growth Rate ◽  
Acetic Acid ◽  
Abscisic Acid ◽  
Gibberellic Acid ◽  
Grain Growth ◽  
Indole Acetic Acid ◽  
Tetraploid Wheat ◽  
Weight Basis ◽  
Ploidy Levels ◽  
Hormonal Content

A pot experiment was conducted in the rabi (post rainy) seasons of 2001 and 2002 to study the genotypic differences in grain growth rate and endogenous hormonal content in the developing grains of hexaploid and tetraploid wheat. The endogenous hormonal contents of grains in both the ploidy levels had changed in sequence. At 5 days after anthesis (DAA), gibberellic acid (GA3); at 15 DAA (rapid growth phase), indole-acetic acid (IAA); at 25 DAA (dough stage), abscisic acid (ABA) were maximum. At 35 DAA, all the endogenous hormonal level decreased and among the hormones, ABA was highest followed by IAA and GA3. Hexaploids recorded higher concentrations of endogenous hormones (13.38% IAA, 17.89% GA3, and 14.7% ABA) on fresh weight basis and resulted in higher seed weight (56.99 mg/grain) and grain growth rate (0.009 g/g/day) compared to tetraploids (49.08 mg/grain; 0.008 g/g/day) on dry weight basis by better mobilization of photosynthates during grain filling. Key Words: Grain growth rate, hormones, indole-acetic acid, gibberellic acid, abscisic acid. doi:10.3329/bjar.v33i3.1608 Bangladesh J. Agril. Res. 33(3) : 493-502, September 2008

The role of exogenous plant regulators in the dormancy of onion bulbs

1974 ◽  
Vol 82 (1) ◽  
pp. 113-116 ◽  
Author(s):  
M. Abdel-Rahman ◽  
F. M. R. Isenberg
Keyword(s):  
Abscisic Acid ◽  
Growth Regulators ◽  
Maleic Hydrazide ◽  
Rest Period ◽  
Storage Period ◽  
Inhibitory Effect ◽  
Onion Bulbs ◽  
Subsequent Application

SUMMARYExperiments were conducted to study the effect of plant injection with growth regulators on the dormancy of onion bulbs cv. Elba Globe. Application of abscisic acid induced early senescence of the leaves and prolonged the rest period of the bulbs. This effect was partially overcome by subsequent applications of gibberellin, auxin or cytokinin and totally overcome with the application of a mixture of the three hormones. Maleic hydrazide application prolonged the rest period by inhibiting both sprouting and rooting of the bulbs throughout the storage period. This inhibitory effect was not overcome by the subsequent application of auxin, gibberellin, kinetin, or their combinations. Ethephon application increased rooting of bulbs and partially overcame the effect of abscisic acid on dormancy.

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