VEGETATIVE PROPAGATION IN LINARIA VULGARIS

1960 ◽  
Vol 38 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Trilochan S. Bakshi ◽  
Robert T. Coupland
Keyword(s):  
Vegetative Propagation ◽  
Lateral Root ◽  
Deleterious Effect ◽  
Soil Disturbance ◽  
Adventitious Buds ◽  
Open Type ◽  
Linaria Vulgaris

Vegetative propagation in Linaria vulgaris is obtained by the development of numerous adventitious buds on its roots. Each bud originates exogenously on the parent root, and it is always associated with a lateral root which arises in the pericycle opposite a protoxylem point. Buds capable of vegetative propagation are not found on either the hypocotyl or the stem. This appears to be correlated with the absence in roots of the typical open type of lenticels and of any significant accumulation of starch. Soil disturbance seems to have a deleterious effect on the production of buds on roots.

Buds on the roots of Hieracium florentinum (hawkweed)

1971 ◽  
Vol 49 (1) ◽  
pp. 53-54 ◽  
Author(s):  
R. L. Peterson ◽  
A. G. Thomas
Keyword(s):  
Vegetative Propagation ◽  
Adventitious Buds ◽  
Root Tips ◽  
Anatomical Studies ◽  
Bud Initiation

Hieracium florentinum All. reproduces vegetatively by adventitious buds which have been shown by anatomical studies to arise from roots. Culture experiments indicate that undamaged roots and isolated root tips have the capacity for bud initiation. Vegetative propagation by means of root-borne buds is important in the expansion of existing populations of H. florentinum.

THE ROOT SYSTEM OF LINARIA VULGARIS MILL. II: DIFFERENTIATION OF ROOT TYPES

1967 ◽  
Vol 45 (1) ◽  
pp. 81-91 ◽  
Author(s):  
W. A. Charlton
Keyword(s):  
Root System ◽  
Vegetative Propagation ◽  
Secondary Growth ◽  
Frequency Of Occurrence ◽  
Linaria Vulgaris ◽  
Primary Xylem ◽  
Root Apices ◽  
The Relationship ◽  
Root Types

The relationship has been investigated between stelar diameter, complexity, and the presence or absence of secondary growth in roots of Linaria vulgaris. Diameter and complexity of the primary xylem body were used as parameters. The presence of secondary growth is considered to be a character of roots developing as long roots. The long roots are responsible for the vegetative propagation of the plant. The frequency of occurrence of secondary growth tends to increase both with stelar diameter and complexity, but secondary growth can occur in roots of any size and complexity. Any root appears to be capable of developing as a long root but the larger roots have a greater chance of so doing. It is thought that roots which are developing as long roots inhibit other roots from such development; probably the larger root apices in any given plant are more capable of escaping from or exerting such inhibition.

Ultrastructural investigation of an adenoma of the pituitary post mortem

1987 ◽  
Vol 45 ◽  
pp. 622-623
Author(s):  
Shirley Siew ◽  
W. C. deMendonca
Keyword(s):  
Deleterious Effect ◽  
Anterior Lobe ◽  
Definitive Diagnosis ◽  
Pars Intermedia ◽  
Post Mortem ◽  
Close Apposition ◽  
Autopsy Material ◽  
Progressive Loss ◽  
Transmission Electron ◽  
Means Of Transmission

The deleterious effect of post mortem degeneration results in a progressive loss of ultrastructural detail. This had led to reluctance (if not refusal) to examine autopsy material by means of transmission electron microscopy. Nevertheless, Johannesen has drawn attention to the fact that a sufficient amount of significant features may be preserved in order to enable the establishment of a definitive diagnosis, even on “graveyard” tissue.Routine histopathology of the autopsy organs of a woman of 78 showed the presence of a well circumscribed adenoma in the anterior lobe of the pituitary. The lesion came into close apposition to the pars intermedia. Its architecture was more compact and less vascular than that of the anterior lobe. However, there was some grouping of the cells in relation to blood vessels. The cells tended to be smaller, with a higher nucleocytoplasmic ratio. The cytoplasm showed a paucity of granules. In some of the cells, it was eosinophilic.

Cognitive Load Mediates the Effect of Emotion on Analytical Thinking

2016 ◽  
Vol 63 (6) ◽  
pp. 343-350 ◽  
Author(s):  
Bastien Trémolière ◽  
Marie-Ève Gagnon ◽  
Isabelle Blanchette
Keyword(s):  
Cognitive Load ◽  
Secondary Task ◽  
Deleterious Effect ◽  
Detrimental Effect ◽  
Emotional Problems ◽  
Syllogistic Reasoning ◽  
Cognitive Resources ◽  
Potential Explanation ◽  
Cognitive Mechanism ◽  
Analytical Thinking

Abstract. Although the detrimental effect of emotion on reasoning has been evidenced many times, the cognitive mechanism underlying this effect remains unclear. In the present paper, we explore the cognitive load hypothesis as a potential explanation. In an experiment, participants solved syllogistic reasoning problems with either neutral or emotional contents. Participants were also presented with a secondary task, for which the difficult version requires the mobilization of cognitive resources to be correctly solved. Participants performed overall worse and took longer on emotional problems than on neutral problems. Performance on the secondary task, in the difficult version, was poorer when participants were reasoning about emotional, compared to neutral contents, consistent with the idea that processing emotion requires more cognitive resources. Taken together, the findings afford evidence that the deleterious effect of emotion on reasoning is mediated by cognitive load.

Inhibition by Phenol and Phenolic Acids of Platelet Release Reaction

1973 ◽  
Vol 30 (02) ◽  
pp. 334-338 ◽  
Author(s):  
Felisa C. Molinas
Keyword(s):  
Renal Failure ◽  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Platelet Function ◽  
Deleterious Effect ◽  
Release Reaction ◽  
Contributory Factors ◽  
Adp Release ◽  
Platelet Release

SummaryIt has been postulated that the high phenol and phenolic acids plasmatic levels found in patients with chronic renal failure are contributory factors in the abnormal platelet function described in these patients. This hypothesis was corroborated by “in vitro” studies showing the deleterious effect of these compounds on certain platelet function after pre-incubation of PRP with phenol and phenolic compounds. The present studies were conducted to determine the influence of phenolic compounds on platelet release reaction. It was found that phenol inhibited from 62.5 to 100% the effect of the aggregating agents thrombin, adrenaline and ADP on platelet 5-HT-14C release. The phenolic acids p-, m-, and o-HPAA inhibited from 36.35 to 94.8% adrenaline and ADP-induced platelet 5-HT-14C release. Adrenaline-induced platelet ADP release was inhibited from 27.45 to 38.10% by the phenolic compounds. These findings confirm the hypothesis that phenolic compounds interfere with platelet function through the inhibition of the release reaction.

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