Document Detail

Seed storage at elevated partial pressure of oxygen, a fast method for analysing seed ageing under dry conditions.
MedLine Citation:
PMID:  22967856     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND AIMS: Despite differences in physiology between dry and relative moist seeds, seed ageing tests most often use a temperature and seed moisture level that are higher than during dry storage used in commercial practice and gene banks. This study aimed to test whether seed ageing under dry conditions can be accelerated by storing under high-pressure oxygen. methods: Dry barley (Hordeum vulgare), cabbage (Brassica oleracea), lettuce (Lactuca sativa) and soybean (Glycine max) seeds were stored between 2 and 7 weeks in steel tanks under 18 MPa partial pressure of oxygen. Storage under high-pressure nitrogen gas or under ambient air pressure served as controls. The method was compared with storage at 45 °C after equilibration at 85 % relative humidity and long-term storage at the laboratory bench. Germination behaviour, seedling morphology and tocopherol levels were assessed.
KEY RESULTS: The ageing of the dry seeds was indeed accelerated by storing under high-pressure oxygen. The morphological ageing symptoms of the stored seeds resembled those observed after ageing under long-term dry storage conditions. Barley appeared more tolerant of this storage treatment compared with lettuce and soybean. Less-mature harvested cabbage seeds were more sensitive, as was the case for primed compared with non-primed lettuce seeds. Under high-pressure oxygen storage the tocopherol levels of dry seeds decreased, in a linear way with the decline in seed germination, but remained unchanged in seeds deteriorated during storage at 45 °C after equilibration at 85 % RH.
CONCLUSIONS: Seed storage under high-pressure oxygen offers a novel and relatively fast method to study the physiology and biochemistry of seed ageing at different seed moisture levels and temperatures, including those that are representative of the dry storage conditions as used in gene banks and commercial practice.
S P C Groot; A A Surki; R C H de Vos; J Kodde
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-09-11
Journal Detail:
Title:  Annals of botany     Volume:  110     ISSN:  1095-8290     ISO Abbreviation:  Ann. Bot.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-23     Completed Date:  2013-04-30     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  0372347     Medline TA:  Ann Bot     Country:  England    
Other Details:
Languages:  eng     Pagination:  1149-59     Citation Subset:  IM    
Plant Research International, Wageningen University and Research centre, PO Box 619, 6700 AP Wageningen, The Netherlands.
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MeSH Terms
Brassica / anatomy & histology,  physiology*
Hordeum / anatomy & histology,  physiology*
Hot Temperature
Lettuce / anatomy & histology,  physiology*
Nitrogen / adverse effects
Oxygen / adverse effects*
Partial Pressure
Plant Roots / anatomy & histology,  physiology
Seedling / anatomy & histology,  physiology
Seeds / anatomy & histology,  physiology*
Soybeans / anatomy & histology,  physiology*
Time Factors
Tocopherols / analysis
Water / physiology
Reg. No./Substance:
1406-66-2/Tocopherols; 7727-37-9/Nitrogen; 7732-18-5/Water; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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