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הספר "אוצר וולקני"
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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Chilling-induced leaf abscission of Ixora coccinea plants. II. Alteration of auxin economy by oxidative stress
Year:
1999
Source of publication :
Physiologia Plantarum
Authors :
מאיר, שמעון
;
.
מיכאלי, רינה
;
.
פילוסוף-הדס, סוניה
;
.
Volume :
107
Co-Authors:
Michaeli, R., Dept. Postharvest Sci. Fresh Produce, ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Riov, J., Kennedy-Leigh Ctr. for Hort. Res., Faculty of Agriculture, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Philosoph-Hadas, S., Dept. Postharvest Sci. Fresh Produce, ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Meir, S., Dept. Postharvest Sci. Fresh Produce, ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
174
To page:
180
(
Total pages:
7
)
Abstract:
Chilling-induced leaf abscission of ixora (Ixora coccinea) plants was almost completely inhibited by α-naphthaleneacetic acid (NAA), even in the presence of exogenous ethylene, which enhanced the chilling effect on leaf abscission. Chilling reduced free indoleacetic acid (IAA) content, quantified immediately after chilling, in the abscission zone (AZ) and leaf blade. Free IAA content in chilling-treated plants continued to decrease gradually with time after chilling. Application of the antioxidant butylated hydroxyanisole (BHA) before or after chilling not only prevented the post-chilling decline in free IAA content, but also restored free IAA level during 6-48 h of the post-chilling period almost to the control level. No significant effect of chilling on the endogenous content of ester- and amide-conjugates of IAA or the metabolism of exogenous labeled IAA were observed. Chilling enhanced the decarboxylation of IAA, particularly in the AZ tissue. Auxin transport capacity was significantly inhibited by chilling, and this effect was counteracted by BHA applied before chilling. The data indicate that chilling reduces free IAA content in the AZ, an effect that may lead to increased sensitivity to ethylene. The chilling-induced reduction in IAA content in the AZ seems to result, at least in part, from increased IAA decarboxylation and reduced auxin transport capacity. These processes seem to be triggered by the oxidative stress imposed on the tissues by chilling.
Note:
Related Files :
abscission
butylated hydroxyanisole
cold tolerance
decarboxylation
ethylene
oxidation
plant development
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תוכן קשור
More details
DOI :
10.1034/j.1399-3054.1999.100204.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
32534
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:10
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