נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Abscisic acid catabolism enhances dormancy release of grapevine buds
Year:
2018
Source of publication :
Plant, Cell & Environment
Authors :
אופיר, רון
;
.
אור, אתי
;
.
אצ'ימפונג, אטיאקו קוואמה
;
.
הללי, תמר
;
.
זנג, צ'ואנלין
;
.
מוגזח, עמיחי
;
.
שי, ג'אוואן
;
.
שייע, פליקס
;
.
Volume :
41
Co-Authors:

Yufei Sun, Violeta Colova, Assaf Mosquna, David W. Galbraith

Facilitators :
From page:
2490
To page:
2503
(
Total pages:
14
)
Abstract:

The molecular mechanism regulating dormancy release in grapevine buds is as yet unclear. It was formerly proposed that dormancy is maintained by abscisic acid (ABA)‐mediated repression of bud–meristem activity and that removal of this repression triggers dormancy release. It was also proposed that such removal of repression may be achieved via natural or artificial up‐regulation of VvA8H‐CYP707A4, which encodes ABA 8′‐hydroxylase, and is the most highly expressed paralog in grapevine buds.

The current study further examines these assumptions, and its experiments reveal that (a) hypoxia and ethylene, stimuli of bud dormancy release, enhance expression of VvA8H‐CYP707A4 within grape buds, (b) the VvA8H‐CYP707A4 protein accumulates during the natural transition to the dormancy release stage, and (c) transgenic vines overexpressing VvA8H‐CYP707A4 exhibit increased ABA catabolism and significant enhancement of bud break in controlled and natural environments and longer basal summer laterals.

The results suggest that VvA8H‐CYP707A4 functions as an ABA degrading enzyme, and are consistent with a model in which the VvA8H‐CYP707A4 level in the bud is up‐regulated by natural and artificial bud break stimuli, which leads to increased ABA degradation capacity, removal of endogenous ABA‐mediated repression, and enhanced regrowth. Interestingly, it also hints at sharing of regulatory steps between latent and lateral bud outgrowth.

Note:
Related Files :
ABA
Abscisic acid
Catabolism
dormancy
Grapevine bud
Vitis / grapes
עוד תגיות
תוכן קשור
More details
DOI :
https://doi.org/10.1111/pce.13371
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
44959
Last updated date:
02/03/2022 17:27
Creation date:
12/11/2019 11:18
You may also be interested in
Scientific Publication
Abscisic acid catabolism enhances dormancy release of grapevine buds
41

Yufei Sun, Violeta Colova, Assaf Mosquna, David W. Galbraith

Abscisic acid catabolism enhances dormancy release of grapevine buds

The molecular mechanism regulating dormancy release in grapevine buds is as yet unclear. It was formerly proposed that dormancy is maintained by abscisic acid (ABA)‐mediated repression of bud–meristem activity and that removal of this repression triggers dormancy release. It was also proposed that such removal of repression may be achieved via natural or artificial up‐regulation of VvA8H‐CYP707A4, which encodes ABA 8′‐hydroxylase, and is the most highly expressed paralog in grapevine buds.

The current study further examines these assumptions, and its experiments reveal that (a) hypoxia and ethylene, stimuli of bud dormancy release, enhance expression of VvA8H‐CYP707A4 within grape buds, (b) the VvA8H‐CYP707A4 protein accumulates during the natural transition to the dormancy release stage, and (c) transgenic vines overexpressing VvA8H‐CYP707A4 exhibit increased ABA catabolism and significant enhancement of bud break in controlled and natural environments and longer basal summer laterals.

The results suggest that VvA8H‐CYP707A4 functions as an ABA degrading enzyme, and are consistent with a model in which the VvA8H‐CYP707A4 level in the bud is up‐regulated by natural and artificial bud break stimuli, which leads to increased ABA degradation capacity, removal of endogenous ABA‐mediated repression, and enhanced regrowth. Interestingly, it also hints at sharing of regulatory steps between latent and lateral bud outgrowth.

Scientific Publication
You may also be interested in