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 -
Hormonal interactions during early physiological partenocarpic fruitlet abscission in persimmon (Diospyros Kaki Thunb.) ‘Triumph’ and ‘Shinshu’ cultivars
Year:
2019
Source of publication :
Scientia Horticulturae
Authors :
דוד, ישראל
;
.
יצחק, יפתח
;
.
יצחקי, ענת
;
.
שייע, פליקס
;
.
Volume :
243
Co-Authors:
Facilitators :
From page:
575
To page:
582
(
Total pages:
8
)
Abstract:

Fruitlet abscission is typical to many fruit trees, including persimmon, (Diopyros kaki Thunb.), and often results in unstable fruit production and yield. We documented massive parthenocarpic fruitlet abscission in the persimmon cultivars ‘Triumph’ and ‘Shinshu’ which initiated soon after anthesis and peaked at 45 days post anthesis. In contrast, abscission of mature fruitlets 45–65 days after anthesis was minor. The early parthenocarpic fruitlet abscission in ‘Shinshu’ and ‘Triumph’ took place in the abscission zone located at the calyx-pedicel junction. Differentiation of the abscission layer occurred during flower development and preceded fruitlet abscission. Endogenous analysis of gibberellins, cytokinins and auxin levels in the abscission zone of ‘Triumph’ and ‘Shinshu’ during the developmental stages preceding abscission revealed a reduction in cytokinin endogenous levels in both cultivars. In addition, a decline in GA3 and IAA levels was found in ‘Triumph’ and ‘Shinsu’ respectively during flower development. Gibberellin, auxin and cytokinin application to inhibit early fruitlet abscission were analyzed and gibberellin treatment exhibited the highest and most consistent inhibition effect in ‘Triumph’ and ‘Shinshu’. An increase in endogenous levels of gibberellins, cytokinins and auxin in the flower abscission zone was found following GA application in both cultivars. Our results suggest that gibberellin application inhibits early fruitlet abscission by elevating cytokinins, and auxin levels and that a reduction in gibberellins, cytokinins and auxin levels may induce abscission during parthenocarpic fruitlet development in ‘Shinshu’ and ‘Triumph’ cultivars. © 2018 Elsevier B.V.

Note:
Related Files :
Abscission zone
Abscission zone (AZ)
Auxin
cytokinin
Diospyros
Diospyros kaki
gibberellins
Parthenocarpic fruitlet abscission
Persimmon
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.scienta.2018.08.044
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
37382
Last updated date:
02/03/2022 17:27
Creation date:
03/10/2018 10:33
You may also be interested in
Scientific Publication
Hormonal interactions during early physiological partenocarpic fruitlet abscission in persimmon (Diospyros Kaki Thunb.) ‘Triumph’ and ‘Shinshu’ cultivars
243
Hormonal interactions during early physiological partenocarpic fruitlet abscission in persimmon (Diospyros Kaki Thunb.) ‘Triumph’ and ‘Shinshu’ cultivars

Fruitlet abscission is typical to many fruit trees, including persimmon, (Diopyros kaki Thunb.), and often results in unstable fruit production and yield. We documented massive parthenocarpic fruitlet abscission in the persimmon cultivars ‘Triumph’ and ‘Shinshu’ which initiated soon after anthesis and peaked at 45 days post anthesis. In contrast, abscission of mature fruitlets 45–65 days after anthesis was minor. The early parthenocarpic fruitlet abscission in ‘Shinshu’ and ‘Triumph’ took place in the abscission zone located at the calyx-pedicel junction. Differentiation of the abscission layer occurred during flower development and preceded fruitlet abscission. Endogenous analysis of gibberellins, cytokinins and auxin levels in the abscission zone of ‘Triumph’ and ‘Shinshu’ during the developmental stages preceding abscission revealed a reduction in cytokinin endogenous levels in both cultivars. In addition, a decline in GA3 and IAA levels was found in ‘Triumph’ and ‘Shinsu’ respectively during flower development. Gibberellin, auxin and cytokinin application to inhibit early fruitlet abscission were analyzed and gibberellin treatment exhibited the highest and most consistent inhibition effect in ‘Triumph’ and ‘Shinshu’. An increase in endogenous levels of gibberellins, cytokinins and auxin in the flower abscission zone was found following GA application in both cultivars. Our results suggest that gibberellin application inhibits early fruitlet abscission by elevating cytokinins, and auxin levels and that a reduction in gibberellins, cytokinins and auxin levels may induce abscission during parthenocarpic fruitlet development in ‘Shinshu’ and ‘Triumph’ cultivars. © 2018 Elsevier B.V.

Scientific Publication
You may also be interested in