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Inhibition of the gravitropic bending response of flowering shoots by salicylic acid
Year:
2003
Source of publication :
Plant Science
Authors :
Friedman, Haya
;
.
Meir, Shimon
;
.
Philosoph-Hadas, Sonia
;
.
Volume :
165
Co-Authors:
Friedman, H., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Meir, S., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Halevy, A.H., Faculty of Agriculture, Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Rehovot 76100, Israel
Philosoph-Hadas, S., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
905
To page:
911
(
Total pages:
7
)
Abstract:
The upward gravitropic bending of cut snapdragon, lupinus and anemone flowering shoots was inhibited by salicylic acid (SA) applied at 0.5 mM and above. This effect was probably not due to acidification of the cytoplasm, since other weak acids did not inhibit bending of snapdragon shoots. In order to study its mode of inhibitory action, we have examined in cut snapdragon shoots the effect of SA on three processes of the gravity-signaling pathway, including: amyloplast sedimentation, formation of ethylene gradient across the stem, and differential growth response. The results show that 1 mM SA inhibited differential ethylene production rates across the horizontal stem and the gravity-induced growth, without significantly inhibiting vertical growth or amyloplast sedimentation following horizontal placement. However, 5 mM SA inhibited all three gravity-induced processes, as well as the growth of vertical shoots, while increasing flower wilting. It may, therefore, be concluded that SA inhibits bending of various cut flowering shoots in a concentration-dependent manner. Thus, at a low concentration SA exerts its effect in snapdragon shoots by inhibiting processes operating downstream to stimulus sensing exerted by amyloplast sedimentation. At a higher concentration SA inhibits bending probably by exerting general negative effects on various cellular processes. © 2003 Elsevier Ireland Ltd. All rights reserved.
Note:
Related Files :
Anemone
Antirrhinum
cut flowers
ethylene
Growth, Development and Aging
Lupinus
metabolism
plant
Ranunculus
Show More
Related Content
More details
DOI :
10.1016/S0168-9452(03)00295-4
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
20411
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:36
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Scientific Publication
Inhibition of the gravitropic bending response of flowering shoots by salicylic acid
165
Friedman, H., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Meir, S., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Halevy, A.H., Faculty of Agriculture, Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Rehovot 76100, Israel
Philosoph-Hadas, S., Dept. Postharvest Sci. Fresh Produce, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Inhibition of the gravitropic bending response of flowering shoots by salicylic acid
The upward gravitropic bending of cut snapdragon, lupinus and anemone flowering shoots was inhibited by salicylic acid (SA) applied at 0.5 mM and above. This effect was probably not due to acidification of the cytoplasm, since other weak acids did not inhibit bending of snapdragon shoots. In order to study its mode of inhibitory action, we have examined in cut snapdragon shoots the effect of SA on three processes of the gravity-signaling pathway, including: amyloplast sedimentation, formation of ethylene gradient across the stem, and differential growth response. The results show that 1 mM SA inhibited differential ethylene production rates across the horizontal stem and the gravity-induced growth, without significantly inhibiting vertical growth or amyloplast sedimentation following horizontal placement. However, 5 mM SA inhibited all three gravity-induced processes, as well as the growth of vertical shoots, while increasing flower wilting. It may, therefore, be concluded that SA inhibits bending of various cut flowering shoots in a concentration-dependent manner. Thus, at a low concentration SA exerts its effect in snapdragon shoots by inhibiting processes operating downstream to stimulus sensing exerted by amyloplast sedimentation. At a higher concentration SA inhibits bending probably by exerting general negative effects on various cellular processes. © 2003 Elsevier Ireland Ltd. All rights reserved.
Scientific Publication
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