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Mutational effects of space flight on Zea mays seedsThe growth and development of more than 500 Zea mays seeds flown on Long Duration Exposure Facility (LDEF) were studied. Somatic mutations, including white-yellow stripes on leaves, dwarfing, change of leaf sheath color or seedling color were observed in plants developed from these seeds. When the frequency of white-yellow formation was used as the endpoint and compared with data from ground based studies, the dose to which maize seeds might be exposed during the flight was estimated to be equivalent to 635 cGy of gamma rays. Seeds from one particular holder gave a high mutation frequency and a wide mutation spectrum. White-yellow stripes on leaves were also found in some of the inbred progenies from plants displayed somatic mutation. Electron microscopy studies showed that the damage of chloroplast development in the white-yellow stripe on leaves was similar between seeds flown on LDEF and that irradiated by accelerated heavy ions on ground.
Document ID
19940039023
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mei, M.
(South China Agricultural Univ. Guangzhou, CN, United States)
Qiu, Y.
(South China Agricultural Univ. Guangzhou, CN, United States)
He, Y.
(South China Agricultural Univ. Guangzhou, CN, United States)
Bucker, H.
(Institute of Aerospace Medicine Cologne, DE, United States)
Yang, C. H.
(NASA Johnson Space Center Houston, TX, US, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Life Sciences and Space Research 25 (2) Radiation Biology: Topical Meeting of the COSPAR Interdisciplinary Scientific Commission F of the COSPAR 29th Plenary Meeting, Washington, DC, Aug. 28-Sep. 5, 1
Volume: 14
Issue: 10
ISSN: 0273-1177
Subject Category
Life Sciences (General)
Accession Number
94A62472
Distribution Limits
Public
Copyright
Other

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