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Changes of carbohydrates in pepper (Capsicum annuum L.) flowers in relation to their abscission under different shading regimes
Year:
1996
Source of publication :
Annals of Botany
Authors :
Aloni, Benyamin
;
.
Karni, Leah
;
.
Schaffer, Arthur
;
.
Zaidman, Zvika
;
.
Volume :
78
Co-Authors:
Aloni, B., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Karni, L., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Zaidman, Z., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Schaffer, A.A., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Facilitators :
From page:
163
To page:
168
(
Total pages:
6
)
Abstract:
Abscission of pepper flowers is enhanced under conditions of low light and high temperature. Our study shows that pepper flowers accumulate assimilates, particularly in the ovary, during the day time, and accumulate starch, which is then metabolized in the subsequent dark period. With the exception of the petals, the ovary contains the highest total amounts of sugars and starch, compared with other flower parts and contains the highest total activity, as well as activity calculated on fresh mass basis, of sucrose synthase, in accordance with the role of this enzyme in starch biosynthesis. Low light intensity or leaf removal decreased sugar accumulation in the flower and subsequently caused flower abscission. The threshold of light intensity for daily sugar accumulation in the sink leaves was much lower than in flowers, resulting in higher daytime accumulation of sugars in the sink leaves than in the adjacent flower buds under any light intensity, suggesting a competition for assimilates between these organs. Flowers of bell pepper cv. 'Maor' and '899' (sensitive to abscission) accumulated less soluble sugars and starch tinder shade than the flowers of bell pepper cv. 'Mazurka' and of paprika cv. 'Lehava' (less sensitive). The results suggest that the flower capacity to accumulate sugars and starch during the day is an important factor in determining flower retention and fruit set.
Note:
Related Files :
abscission
Acid invertase
Capsicum annuum
leaves
ovary
Pepper
Pepper flowers
Starch
Show More
Related Content
More details
DOI :
10.1006/anbo.1996.0109
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
22411
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:51
You may also be interested in
Scientific Publication
Changes of carbohydrates in pepper (Capsicum annuum L.) flowers in relation to their abscission under different shading regimes
78
Aloni, B., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Karni, L., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Zaidman, Z., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Schaffer, A.A., Department of Vegetable Crops, Volcani Center, Institute of Field and Garden Crops, P.O.B. 6, Bet Dagan 50250, Israel
Changes of carbohydrates in pepper (Capsicum annuum L.) flowers in relation to their abscission under different shading regimes
Abscission of pepper flowers is enhanced under conditions of low light and high temperature. Our study shows that pepper flowers accumulate assimilates, particularly in the ovary, during the day time, and accumulate starch, which is then metabolized in the subsequent dark period. With the exception of the petals, the ovary contains the highest total amounts of sugars and starch, compared with other flower parts and contains the highest total activity, as well as activity calculated on fresh mass basis, of sucrose synthase, in accordance with the role of this enzyme in starch biosynthesis. Low light intensity or leaf removal decreased sugar accumulation in the flower and subsequently caused flower abscission. The threshold of light intensity for daily sugar accumulation in the sink leaves was much lower than in flowers, resulting in higher daytime accumulation of sugars in the sink leaves than in the adjacent flower buds under any light intensity, suggesting a competition for assimilates between these organs. Flowers of bell pepper cv. 'Maor' and '899' (sensitive to abscission) accumulated less soluble sugars and starch tinder shade than the flowers of bell pepper cv. 'Mazurka' and of paprika cv. 'Lehava' (less sensitive). The results suggest that the flower capacity to accumulate sugars and starch during the day is an important factor in determining flower retention and fruit set.
Scientific Publication
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