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פותח על ידי קלירמאש פתרונות בע"מ -
Flowering control by artificial gibberellins
Year:
1999
Source of publication :
Acta Horticulturae
Authors :
ארנר, יאיר
;
.
בן-טל, יוסי
;
.
Volume :
482
Co-Authors:
Ben-Tal, Y., Dept. of Ornamental Horticulture, Inst. of Horticulture, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Erner, Y., Dept. of Citriculture, Inst. of Horticulture, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
21
To page:
26
(
Total pages:
6
)
Abstract:
Gibberellins (GA) was known to be involved in flowering processes of many plants since the late 1950s and it was considered as the flowering hormone for a while. But the information was very confusing. In some plants it promoted flowering, while in others flowering was inhibited. Then, a new theory suggested that GA promoted flowering only in long day plants (LDP) or when vernalization was required. But many exceptions that contradicted this theory were accumulated. All the research work leading to the early theories that related flowering to GA were done with GA3 or by its common name "Gibberellin Acid". As more and more GAs were discovered their role in plants became more confusing. In the mid 1980s Pharis and coworkers suggested that some functional groups in the GA molecule are the control mechanism that distinguished among the different GAs regarding their function. Comparisons of different GAs revealed that GA4 was more active than GA3 in flowering promotion of woody Angiosperms, especially in Pinaceae, and apple trees while GA1 was associated with elongation. Based on these assumptions Mander synthesized GAs in which certain changes like addition of hydroxyl groups, changing bond's type etc. were introduced artificially into the molecule and were tested for their ability to promote flowering. Some of these compounds actually promoted flowering in various plants. Furthermore, elongation was not affected and sometimes even inhibited. It was the first time that flowering induced by GAs was separated from stem or inflorescence elongation. These artificial GAs promoted flowering in Lolium temulentum, Salix pentandra, Thalaspi averenze, Xanthium strumarium, Pharbitis nil, Sorghum bicolor L and we found it effective in orange, olive, grapevine and Limonium. The fact that a large number of plants had responded so far to artificial GAs, might be a beginning of a new era. We might be able to control flowering of commercial cut flowers by simple sprays.
Note:
Related Files :
Ipomoea nil
Limonium
Lolium temulentum
Malus x domestica
Pinaceae
Salix pentandra
Sorghum bicolor
Vitis
Xanthium strumarium
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20735
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:38
Scientific Publication
Flowering control by artificial gibberellins
482
Ben-Tal, Y., Dept. of Ornamental Horticulture, Inst. of Horticulture, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Erner, Y., Dept. of Citriculture, Inst. of Horticulture, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Flowering control by artificial gibberellins
Gibberellins (GA) was known to be involved in flowering processes of many plants since the late 1950s and it was considered as the flowering hormone for a while. But the information was very confusing. In some plants it promoted flowering, while in others flowering was inhibited. Then, a new theory suggested that GA promoted flowering only in long day plants (LDP) or when vernalization was required. But many exceptions that contradicted this theory were accumulated. All the research work leading to the early theories that related flowering to GA were done with GA3 or by its common name "Gibberellin Acid". As more and more GAs were discovered their role in plants became more confusing. In the mid 1980s Pharis and coworkers suggested that some functional groups in the GA molecule are the control mechanism that distinguished among the different GAs regarding their function. Comparisons of different GAs revealed that GA4 was more active than GA3 in flowering promotion of woody Angiosperms, especially in Pinaceae, and apple trees while GA1 was associated with elongation. Based on these assumptions Mander synthesized GAs in which certain changes like addition of hydroxyl groups, changing bond's type etc. were introduced artificially into the molecule and were tested for their ability to promote flowering. Some of these compounds actually promoted flowering in various plants. Furthermore, elongation was not affected and sometimes even inhibited. It was the first time that flowering induced by GAs was separated from stem or inflorescence elongation. These artificial GAs promoted flowering in Lolium temulentum, Salix pentandra, Thalaspi averenze, Xanthium strumarium, Pharbitis nil, Sorghum bicolor L and we found it effective in orange, olive, grapevine and Limonium. The fact that a large number of plants had responded so far to artificial GAs, might be a beginning of a new era. We might be able to control flowering of commercial cut flowers by simple sprays.
Scientific Publication
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