Water uptake in germinating pecan (Carya illinoinensis) seed.
Carya illinoensis
endocarp
high-field magnetic resonance imaging (MRI)
seed germination
water uptake
Journal
Plant biology (Stuttgart, Germany)
ISSN: 1438-8677
Titre abrégé: Plant Biol (Stuttg)
Pays: England
ID NLM: 101148926
Informations de publication
Date de publication:
Aug 2023
Aug 2023
Historique:
received:
25
01
2023
accepted:
09
05
2023
medline:
14
7
2023
pubmed:
18
5
2023
entrez:
18
5
2023
Statut:
ppublish
Résumé
Water uptake is the fundamental and essential requirement for seed germination. Pecan seed has a hard woody endocarp that plays an important role during water uptake. To explore water uptake during germination, the spatiotemporal pattern of water and effect of the endocarp were analysed using high-field MRI, dye-tracing, wax blocking and SEM of water uptake. Isolated seeds completed water uptake in 8 h while whole seeds required 6 days, hence, cracking the endocarp plays an important role. The hilum is the channel through which water enters the seed, while the remainder of the seed coat consist of cells covered with a waxy layer that act as a barrier to water absorption. The region with the highest water content in pecan seed is the edge of the U-shaped region, and water can progressively diffuse from this U-shaped region into the whole kernel. We report a new water absorption stage between phase II and phase III of the triphasic model of water uptake of pecan seeds. Cracking the endocarp changed water distribution in pecan seeds, which may trigger further water absorption and radicle elongation.
Substances chimiques
Water
059QF0KO0R
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
696-702Subventions
Organisme : National Natural Science Foundation of China
ID : 32001310
Organisme : Anhui Provincial Educational Foundation
ID : 2022AH030111
Organisme : Chuzhou University Start-up Foundation for Research
ID : 2021qd05
Organisme : Chuzhou University Start-up Foundation for Research
ID : 2020qd33
Informations de copyright
© 2023 John Wiley & Sons Ltd. Published by John Wiley & Sons Ltd.
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