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פותח על ידי קלירמאש פתרונות בע"מ -
Inducing freezing tolerance in Narcissus bulbs by growth retardants
Year:
1997
Source of publication :
Acta Horticulturae
Authors :
פילוסוף-הדס, סוניה
;
.
Volume :
430
Co-Authors:
Cohen, V., Kennedy-Leigh Centre for Horticulture Research, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Borochov, A., Kennedy-Leigh Centre for Horticulture Research, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Philosoph-Hadas, S., Dept. of Postharvest Science of Fresh Produce, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
459
To page:
464
(
Total pages:
6
)
Abstract:
Transient exposure to below-freezing temperatures, during growth or post-harvest, damages many ornamental geophytes. The aim of this work was to investigate means for hardening narcissus (N. tazetta, cv. Ziva) bulbs to freezing stress. Several techniques were used to evaluate bulb viability. The increase in electrolyte leakage and visible injuries in the in-bulb inflorescence were positively correlated with the freezing stress effects on plant growth and flowering. Injuries were observed following exposure to -2°C for more than 6 h. Attempts to reduce sensitivity of the bulbs to low temperatures through hardening at +2°C for several weeks were unsuccessful. However, a single soil drench with paclobutrazol or uniconazole resulted in production of daughter bulbs that were not injured by freezing at -2°C for 12 h, as judged by electrolyte leakage and growth measurements. This bulb hardening was accompanied by modifications in membrane enzymes and solute uptake activities. We therefore assume that changes in membrane properties are to a large extent involved in the hardening process.
Note:
Related Files :
Narcissus
Narcissus tazetta
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
28189
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:37
Scientific Publication
Inducing freezing tolerance in Narcissus bulbs by growth retardants
430
Cohen, V., Kennedy-Leigh Centre for Horticulture Research, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Borochov, A., Kennedy-Leigh Centre for Horticulture Research, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Philosoph-Hadas, S., Dept. of Postharvest Science of Fresh Produce, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Inducing freezing tolerance in Narcissus bulbs by growth retardants
Transient exposure to below-freezing temperatures, during growth or post-harvest, damages many ornamental geophytes. The aim of this work was to investigate means for hardening narcissus (N. tazetta, cv. Ziva) bulbs to freezing stress. Several techniques were used to evaluate bulb viability. The increase in electrolyte leakage and visible injuries in the in-bulb inflorescence were positively correlated with the freezing stress effects on plant growth and flowering. Injuries were observed following exposure to -2°C for more than 6 h. Attempts to reduce sensitivity of the bulbs to low temperatures through hardening at +2°C for several weeks were unsuccessful. However, a single soil drench with paclobutrazol or uniconazole resulted in production of daughter bulbs that were not injured by freezing at -2°C for 12 h, as judged by electrolyte leakage and growth measurements. This bulb hardening was accompanied by modifications in membrane enzymes and solute uptake activities. We therefore assume that changes in membrane properties are to a large extent involved in the hardening process.
Scientific Publication
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