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פותח על ידי קלירמאש פתרונות בע"מ -
Behaviour of hard and permeable seeds of Abutilon theophrasti Medic. (velvetleaf)
Year:
1985
Source of publication :
Weed Research
Authors :
הורוביץ, מנשה
;
.
Volume :
25
Co-Authors:
HOROWITZ, M., Department of Ornamental Horticulture, Agricultural Research Organization, P.O. Box 6, Bet Dagan, Israel
TAYLORSON, R.B., Weed Science Laboratory, U.S. Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, 20705, United States
Facilitators :
From page:
363
To page:
372
(
Total pages:
10
)
Abstract:
Experiments were carried out on seeds of Abutilon theophrasti (velvetleaf) to examine the germination behaviour of hard (impermeable) and soft (permeable) seeds and to test various physical and chemical treatments against hardseededness. There was no evidence, in fresh or in old seeds, of leachable germination inhibitors or of leachable compounds affecting hardseededness. Marked differences were found between hard and soft seeds in respiration and leakage. Oxygen uptake was negligible in hard seeds. A rapid efflux of K+ ions from hard and soft seeds was detected during the first minutes of immersion. Subsequently, the rate of leakage of hard seeds decreased markedly. After 4 h of imbibition, conductivity measurements differentiated individual hard and soft seeds. Abrasion, percussion and immersion in sodium hypochlorite had no effect on hard seeds, but mechanical scarification and immersion in sulphuric acid reduced hardseededness. Gamma radiation did not affect the hard coat but damaged the embryo. A. theophrasti seeds were exposed to organic solvents such as acetone. ethanol and methanol, and to pesticides such as butylate, EPTC, metham‐sodium, vernolate and methyl bromide, in liquid or gaseous phase. Some of the treatments reduced germination of soft seeds, but none, even methyl bromide, had any significant effect on the number or viability of hard seeds, proving their complete impermeability. Copyright © 1985, Wiley Blackwell. All rights reserved
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1365-3180.1985.tb00657.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26385
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:22
Scientific Publication
Behaviour of hard and permeable seeds of Abutilon theophrasti Medic. (velvetleaf)
25
HOROWITZ, M., Department of Ornamental Horticulture, Agricultural Research Organization, P.O. Box 6, Bet Dagan, Israel
TAYLORSON, R.B., Weed Science Laboratory, U.S. Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, 20705, United States
Behaviour of hard and permeable seeds of Abutilon theophrasti Medic. (velvetleaf)
Experiments were carried out on seeds of Abutilon theophrasti (velvetleaf) to examine the germination behaviour of hard (impermeable) and soft (permeable) seeds and to test various physical and chemical treatments against hardseededness. There was no evidence, in fresh or in old seeds, of leachable germination inhibitors or of leachable compounds affecting hardseededness. Marked differences were found between hard and soft seeds in respiration and leakage. Oxygen uptake was negligible in hard seeds. A rapid efflux of K+ ions from hard and soft seeds was detected during the first minutes of immersion. Subsequently, the rate of leakage of hard seeds decreased markedly. After 4 h of imbibition, conductivity measurements differentiated individual hard and soft seeds. Abrasion, percussion and immersion in sodium hypochlorite had no effect on hard seeds, but mechanical scarification and immersion in sulphuric acid reduced hardseededness. Gamma radiation did not affect the hard coat but damaged the embryo. A. theophrasti seeds were exposed to organic solvents such as acetone. ethanol and methanol, and to pesticides such as butylate, EPTC, metham‐sodium, vernolate and methyl bromide, in liquid or gaseous phase. Some of the treatments reduced germination of soft seeds, but none, even methyl bromide, had any significant effect on the number or viability of hard seeds, proving their complete impermeability. Copyright © 1985, Wiley Blackwell. All rights reserved
Scientific Publication
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