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פותח על ידי קלירמאש פתרונות בע"מ -
Short-chain saturated fatty acids in the regulation of pollination- induced ethylene sensitivity of Phalaenopsis flowers
Year:
1996
Source of publication :
Physiologia Plantarum
Authors :
פורת, רון
;
.
Volume :
97
Co-Authors:
Halevy, A.H., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Porat, R., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Spiegelstein, H., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Borochov, A., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Botha, L., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Whitehead, C.S., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Facilitators :
From page:
469
To page:
474
(
Total pages:
6
)
Abstract:
Pollination greatly accelerates petal senescence. The first observed event after pollination is an increase in the flower's sensitivity to ethylene, followed by an increase in ethylene biosynthesis. Our objectives were to study the mode of action of the increase in ethylene sensitivity and the possible involvement of short-chain saturated fatty acids (SCSFAs) in this process. Application of SCSFAs, ranging in chain length from 7 to 10 carbons onto stigmas of Phalaenopsis (Phalaenopsis hybrid, cv. Herbert Hager) flowers increased their sensitivity to ethylene in the same way as pollination. Following pollination, there was a significant increase in the endogenous content of these fatty acids in the flower's column and perianth, with octanoic acid (C8) being the main SCSFA observed. The increase in SCSFA content was observed as early as 6 h after pollination anti began to decline 6 h later. Incorporation of octanoic acid into liposomes or microsomal membranes isolated from Phalaenopsis petals resulted in a de crease in lipid order that was detected by fluorescence polarization of dansyl pyrrolidine (DNSP) but not of 1,6-diphenyl-1,3,5-hexatriene (DPH). At peak ethylene sensitivity, 10 h after pollination, there was a significant decrease in the lipid order of microsomal membranes isolated from Phalaenopsis columns and perianths, again as detected by DNSP but not by DPH. Stigmatic application of octanoic acid mimicked the effect of pollination on membrane lipid order. We suggest that SCSFAs may be the ethylene 'sensitivity factors' produced following pollination, and that their mode of action involves a decrease in the order of specific regions in the membrane lipid bilayer, consequently altering ethylene action.
Note:
Related Files :
ethylene
fatty acids
fluorescence polarization
lipid order
Membranes
Phalaenopsis
Phalaenopsis hybrid
pollination
senescence
עוד תגיות
תוכן קשור
More details
DOI :
10.1034/j.1399-3054.1996.970308.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20753
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:38
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Scientific Publication
Short-chain saturated fatty acids in the regulation of pollination- induced ethylene sensitivity of Phalaenopsis flowers
97
Halevy, A.H., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Porat, R., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Spiegelstein, H., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Borochov, A., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Botha, L., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Whitehead, C.S., Faculty of Agriculture, KLCHR, Hebrew Univ. of Jerusalem, P.O. Box 12, Rehovot 76-100, Israel
Short-chain saturated fatty acids in the regulation of pollination- induced ethylene sensitivity of Phalaenopsis flowers
Pollination greatly accelerates petal senescence. The first observed event after pollination is an increase in the flower's sensitivity to ethylene, followed by an increase in ethylene biosynthesis. Our objectives were to study the mode of action of the increase in ethylene sensitivity and the possible involvement of short-chain saturated fatty acids (SCSFAs) in this process. Application of SCSFAs, ranging in chain length from 7 to 10 carbons onto stigmas of Phalaenopsis (Phalaenopsis hybrid, cv. Herbert Hager) flowers increased their sensitivity to ethylene in the same way as pollination. Following pollination, there was a significant increase in the endogenous content of these fatty acids in the flower's column and perianth, with octanoic acid (C8) being the main SCSFA observed. The increase in SCSFA content was observed as early as 6 h after pollination anti began to decline 6 h later. Incorporation of octanoic acid into liposomes or microsomal membranes isolated from Phalaenopsis petals resulted in a de crease in lipid order that was detected by fluorescence polarization of dansyl pyrrolidine (DNSP) but not of 1,6-diphenyl-1,3,5-hexatriene (DPH). At peak ethylene sensitivity, 10 h after pollination, there was a significant decrease in the lipid order of microsomal membranes isolated from Phalaenopsis columns and perianths, again as detected by DNSP but not by DPH. Stigmatic application of octanoic acid mimicked the effect of pollination on membrane lipid order. We suggest that SCSFAs may be the ethylene 'sensitivity factors' produced following pollination, and that their mode of action involves a decrease in the order of specific regions in the membrane lipid bilayer, consequently altering ethylene action.
Scientific Publication
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