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Bridging Dormancy Release and Apical Dominance in Potato Tuber
Year:
2015
Source of publication :
Advances in Plant Dormancy
Authors :
Eshel, Dani
;
.
Volume :
Co-Authors:
Facilitators :
From page:
187
To page:
196
(
Total pages:
10
)
Abstract:

The potato tuber is a swollen stem that develops and matures underground and is harvested at physiological dormancy. During postharvest storage, potato tuber dormancy is regulated by endogenous plant hormones and their balance inside the tuber. Dormant potato tubers cannot be induced for early sprouting without some form of stress or exogenous hormone treatment. The role of hormonal control in tuber dormancy release and sprouting has been investigated but is still not well understood. When dormancy is released, sprouting may be inhibited by exogenous sprouting control agents or cold temperature, leading to stem branching. Within the tuber, a rapid shift from storage metabolism to reserve mobilization during postharvest storage suggests a transition from sink to source, consistent with bud growth. Dominance of the growing apical bud over other lateral buds decreases during storage and is one of the earliest morphophysiological indicators of the tuber’s physiological age . Bud sprouting and branching during storage is a serious problem for seed tuber producers since it affects future plant stem numbers which in turn determine daughter tuber size distribution. Three main types of loss of apical dominance (AD) affect sprouting pattern. Hallmarks of programmed cell death have been identified in the tuber apical meristem (TAM) during extended cold storage or chemical stress and are associated with loss of AD. Nevertheless, hormonal regulation, carbohydrate reserves, and viability of the TAM cells determine tuber sprouting pattern.

Note:
Related Files :
abiotic stress response
Apical dominance
Bud activation
Dormancy release
Physiological age
Potato tuber
sprouting
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More details
DOI :
https://doi.org/10.1007/978-3-319-14451-1_11
Article number:
0
Affiliations:
Database:
Google Scholar
Publication Type:
Book chapter
;
.
Language:
English
Editors' remarks:
ID:
44798
Last updated date:
02/03/2022 17:27
Creation date:
07/11/2019 08:02
You may also be interested in
Scientific Publication
Bridging Dormancy Release and Apical Dominance in Potato Tuber
Bridging Dormancy Release and Apical Dominance in Potato Tuber

The potato tuber is a swollen stem that develops and matures underground and is harvested at physiological dormancy. During postharvest storage, potato tuber dormancy is regulated by endogenous plant hormones and their balance inside the tuber. Dormant potato tubers cannot be induced for early sprouting without some form of stress or exogenous hormone treatment. The role of hormonal control in tuber dormancy release and sprouting has been investigated but is still not well understood. When dormancy is released, sprouting may be inhibited by exogenous sprouting control agents or cold temperature, leading to stem branching. Within the tuber, a rapid shift from storage metabolism to reserve mobilization during postharvest storage suggests a transition from sink to source, consistent with bud growth. Dominance of the growing apical bud over other lateral buds decreases during storage and is one of the earliest morphophysiological indicators of the tuber’s physiological age . Bud sprouting and branching during storage is a serious problem for seed tuber producers since it affects future plant stem numbers which in turn determine daughter tuber size distribution. Three main types of loss of apical dominance (AD) affect sprouting pattern. Hallmarks of programmed cell death have been identified in the tuber apical meristem (TAM) during extended cold storage or chemical stress and are associated with loss of AD. Nevertheless, hormonal regulation, carbohydrate reserves, and viability of the TAM cells determine tuber sprouting pattern.

Scientific Publication
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