scholarly journals Role of Endogenous Growth Regulators in Seed Dormancy of Avena fatua

1982 ◽  
Vol 70 (5) ◽  
pp. 1480-1485 ◽  
Author(s):  
James D. Metzger ◽  
Deborah K. Sebesta
Keyword(s):  
Endogenous Growth ◽  
Seed Dormancy ◽  
Growth Regulators ◽  
Avena Fatua

scholarly journals Role of endogenous growth regulators in vernalization of seeds of radish (Raphanus sativus L.)

2014 ◽  
Vol 50 (4) ◽  
pp. 653-662
Author(s):  
Marian Michniewicz ◽  
Krystyna Kriesel ◽  
Barbara Rożej
Keyword(s):  
Endogenous Growth ◽  
Growth Regulators ◽  
Raphanus Sativus ◽  
Growth Stage ◽  
Cold Treatment ◽  
Flower Initiation ◽  
Raphanus Sativus L

In embryos and cotyledons of seeds of the radish cv. `Tetra Iłówiecka' (which needs 20 days of vernalization) and cv. 'Saxa' (which flowers without vernalization) germinating at a vernalizing temperature of 5°C, the levels of auxins, gibberellins, cytokinins and the aibscisic acid-like inhibitor were determined, The analyses were performed after 5, 10, 15, 20, 25 and 30 days of chilling. The levels of growth regulators were also determined in embryos and cotyledons of seeds germinated at 260C when in the same growth stage as the material taken from chilled seeds. Cold treatment significantly affected the level of all endogenous growth regulators in embryos and cotyledons of both varieties. However, changes in the levels of these substances were not directly connected with the vernalization process. It was found that the vernalization of seeds of 'the radish cv. `Tetra Iłówiecka' increased the level of GAs in leaves, this did not, however, coincide with flower initiation. It is concluded that the role of GAs in flowering of the studied plants is connected rather with photoinduction than with vernalization.

Dormancy studies in seed of Avena fatua. 10. On the inheritance of germination behaviour

1979 ◽  
Vol 57 (15) ◽  
pp. 1663-1667 ◽  
Author(s):  
S. Jana ◽  
S. N. Acharya ◽  
J. M. Naylor
Keyword(s):  
Seed Dormancy ◽  
Avena Fatua ◽  
Seed Maturation ◽  
Germination Behaviour ◽  
Parental Lines ◽  
Pure Lines

Breeding experiments were performed with pure lines of Avena fatua differing characteristically in duration of primary seed dormancy. The results indicate that the parental lines differ for at least three genes controlling rate of afterripening. It is evident that at least two of these genes influence the rate of afterripening at different periods after seed maturation.

scholarly journals Retrospectives Whatever Happened to the Cambridge Capital Theory Controversies?

2003 ◽  
Vol 17 (1) ◽  
pp. 199-214 ◽  
Author(s):  
Avi J Cohen ◽  
G. C Harcourt
Keyword(s):  
Business Cycle ◽  
Endogenous Growth ◽  
Path Dependence ◽  
Real Business Cycle ◽  
Capital Theory ◽  
Economic Process ◽  
The 1950S ◽  
Simple Models

We argue that the Cambridge capital theory controversies of the 1950s to 1970s were the latest in a series of still-unresolved controversies over three deep issues: explaining and justifying the return to capital; Joan Robinson's complaint that, due to path dependence, equilibrium is not an outcome of an economic process and therefore an inadequate tool for analyzing accumulation and growth; and the role of ideology and vision in fuelling controversy when results of simple models are not robust. We predict these important and relevant issues, latent in endogenous growth and real business cycle theories, will erupt in future controversy.

Role of ethylene and proteolytic N‐degron pathway in the regulation of Arabidopsis seed dormancy

2021 ◽  
Author(s):  
Xu Wang ◽  
Malaika Maraya Gomes ◽  
Christophe Bailly ◽  
Eiji Nambara ◽  
Françoise Corbineau
Keyword(s):  
Seed Dormancy ◽  
Arabidopsis Seed

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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