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פותח על ידי קלירמאש פתרונות בע"מ -
Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
Year:
2021
Source of publication :
Journal of Experimental Botany
Authors :
מורוזוב, מיכאל
;
.
צדקה, אבי
;
.
קמארה, יצחק
;
.
Volume :
Co-Authors:

Dor Haim, 
Liron Shalom, 
Yasmin Simhon, 
Lyudmila Shlizerman, 
Itzhak Kamara, 
Michael Morozov, 
Alfonso Albacete, 
Rosa M Rivero, 
Avi Sadka

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

In many fruit trees, heavy fruit load in one year reduces flowering in the following year, creating a biennial fluctuation in yield termed alternate bearing (AB). In subtropical trees, where flowering induction is mostly governed by the accumulation of chilling hours, fruit load is thought to generate a signal (AB signal) that blocks the perception of cold induction. Fruit removal during a heavy-fruit-load year is effective at inducing flowering only if performed one to a few months before the onset of the flowering induction period. We previously showed that following fruit removal, the content of the auxin indoleacetic acid (IAA) in citrus buds is reduced, suggesting that the hormone plays a role in the AB signal. Here, we demonstrate that fruit presence generates relatively strong polar auxin transport in citrus and olive stems. Upon fruit removal, polar auxin transport is reduced and allows auxin release from the bud. Furthermore, using immunolocalization, hormone, and gene expression analyses, we show that in citrus, IAA level in the bud and specifically in the apical meristem is reduced upon fruit removal. Overall, our data provide support for the notion that fruit presence generates an auxin signal in the bud, which may affect flowering induction.

Note:
Related Files :
alternate bearing
Auxin
Citrus
Defruiting
Fruit load
fruit trees
indoleacetic acid
olive
Polar auxin transport
עוד תגיות
תוכן קשור
More details
DOI :
10.1093/jxb/eraa590
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
54963
Last updated date:
02/03/2022 17:27
Creation date:
12/05/2021 21:02
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Scientific Publication
Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud

Dor Haim, 
Liron Shalom, 
Yasmin Simhon, 
Lyudmila Shlizerman, 
Itzhak Kamara, 
Michael Morozov, 
Alfonso Albacete, 
Rosa M Rivero, 
Avi Sadka

Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud

In many fruit trees, heavy fruit load in one year reduces flowering in the following year, creating a biennial fluctuation in yield termed alternate bearing (AB). In subtropical trees, where flowering induction is mostly governed by the accumulation of chilling hours, fruit load is thought to generate a signal (AB signal) that blocks the perception of cold induction. Fruit removal during a heavy-fruit-load year is effective at inducing flowering only if performed one to a few months before the onset of the flowering induction period. We previously showed that following fruit removal, the content of the auxin indoleacetic acid (IAA) in citrus buds is reduced, suggesting that the hormone plays a role in the AB signal. Here, we demonstrate that fruit presence generates relatively strong polar auxin transport in citrus and olive stems. Upon fruit removal, polar auxin transport is reduced and allows auxin release from the bud. Furthermore, using immunolocalization, hormone, and gene expression analyses, we show that in citrus, IAA level in the bud and specifically in the apical meristem is reduced upon fruit removal. Overall, our data provide support for the notion that fruit presence generates an auxin signal in the bud, which may affect flowering induction.

Scientific Publication
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