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פותח על ידי קלירמאש פתרונות בע"מ -
Involvement of rooting factors and free IAA in the rootability of citrus species stem cuttings
Year:
1992
Source of publication :
Scientia Horticulturae
Authors :
מדינה, שלומית
;
.
רביב, מיכאל
;
.
Volume :
51
Co-Authors:
Sagee, O., Department of Citriculture, Agriculture Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Raviv, M., Department of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar, 31999, Israel
Medina, Sh., Department of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar, 31999, Israel
Becker, D., Department of Chemistry, Technion - Israel Institute of Technology, Haifa, 32000, Israel
Cosse, A., Department of Chemistry, Technion - Israel Institute of Technology, Haifa, 32000, Israel
Facilitators :
From page:
187
To page:
195
(
Total pages:
9
)
Abstract:
Two-year-old trees of cultivar 'Rangpur' lime (Citrus limonia Osb.) and of cultivar 'Oroblanco', a triploid pummelo-grapefruit hybrid (Citrus grandis Osb. × Citrus paradisi Macf.), which had not reached flowering stage, were grown under greenhouse conditions. Cuttings from the last vigorous vegetative flush were taken from each species for rooting experiments. Callus formation and percentage of rooting were determined after 19 and 36 days. Endogenous indole-3-acetic acid (IAA) content and avocado rooting promoter (ARP)-like activity were determined in leaves and bark (cortex) of the lower end of the cutting on day of excision and 19 days later. Rooting of the easy-to-root 'Rangpur' lime reached 77% after 19 days and 100% after 36 days. At those times the difficult-to-root 'Oroblanco' did not root at all or reached 12% rooting, respectively. At Day 19 the level of free IAA in the bark of 'Rangpur' lime was 3.5 times higher than that at Day 0, and 3.6 times higher than in the 'Oroblanco' bark on the same day. ARP was found in both species at excision day and after 19 days using gas-chromatography analysis. The ARP activity on the day of excision was only slightly higher in the leaves and bark of 'Rangpur' lime than in 'Oroblanco', but after 19 days ARP-like activity rose approximately 45% in the basal bark of 'Rangpur' lime with no such increase in its leaves or in the leaves and bark of 'Oroblanco'. The differences in IAA level and ARP-like activity in the two citrus cultivars appear to be correlated with their ease of rooting, but it is not possible to tell whether the increase in IAA and ARP over the rooting period is the cause or result of root initiation. © 1992.
Note:
Related Files :
'Oroblanco'
'Rangpur'
avocado rooting promoter
cuttage propagation
Indole-3-acetic acid
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0304-4238(92)90118-V
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
30263
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:53
Scientific Publication
Involvement of rooting factors and free IAA in the rootability of citrus species stem cuttings
51
Sagee, O., Department of Citriculture, Agriculture Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Raviv, M., Department of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar, 31999, Israel
Medina, Sh., Department of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar, 31999, Israel
Becker, D., Department of Chemistry, Technion - Israel Institute of Technology, Haifa, 32000, Israel
Cosse, A., Department of Chemistry, Technion - Israel Institute of Technology, Haifa, 32000, Israel
Involvement of rooting factors and free IAA in the rootability of citrus species stem cuttings
Two-year-old trees of cultivar 'Rangpur' lime (Citrus limonia Osb.) and of cultivar 'Oroblanco', a triploid pummelo-grapefruit hybrid (Citrus grandis Osb. × Citrus paradisi Macf.), which had not reached flowering stage, were grown under greenhouse conditions. Cuttings from the last vigorous vegetative flush were taken from each species for rooting experiments. Callus formation and percentage of rooting were determined after 19 and 36 days. Endogenous indole-3-acetic acid (IAA) content and avocado rooting promoter (ARP)-like activity were determined in leaves and bark (cortex) of the lower end of the cutting on day of excision and 19 days later. Rooting of the easy-to-root 'Rangpur' lime reached 77% after 19 days and 100% after 36 days. At those times the difficult-to-root 'Oroblanco' did not root at all or reached 12% rooting, respectively. At Day 19 the level of free IAA in the bark of 'Rangpur' lime was 3.5 times higher than that at Day 0, and 3.6 times higher than in the 'Oroblanco' bark on the same day. ARP was found in both species at excision day and after 19 days using gas-chromatography analysis. The ARP activity on the day of excision was only slightly higher in the leaves and bark of 'Rangpur' lime than in 'Oroblanco', but after 19 days ARP-like activity rose approximately 45% in the basal bark of 'Rangpur' lime with no such increase in its leaves or in the leaves and bark of 'Oroblanco'. The differences in IAA level and ARP-like activity in the two citrus cultivars appear to be correlated with their ease of rooting, but it is not possible to tell whether the increase in IAA and ARP over the rooting period is the cause or result of root initiation. © 1992.
Scientific Publication
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