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Mutagenic effects of heavy ion radiation in plantsGenetic and developmental effects of heavy ions in maize and rice were investigated. Heavy particles with various charges and energies were accelerated at the BEVALAC. The frequency of occurrence of white-yellow stripes on leaves of plants developed from irradiated maize seeds increased linearly with dose, and high Linear Energy Transfer (LET) heavy charged particles, e.g., neon, argon, and iron, were 2-12 times as effective as gamma rays in inducing this type of mutation. The effectiveness of high-LET heavy ion in (1) inhibiting rice seedling growth, (2) reducing plant fertility, (3) inducing chromosome aberration and micronuclei in root tip cells and pollen mother cells of the first generation plants developed from exposed seeds, and (4) inducing mutation in the second generation, were greater than that of low-LET gamma rays. All effects observed were dose-dependent; however, there appeared to be an optimal range of doses for inducing certain types of mutation, for example, for argon ions (400 MeV/u) at 90-100 Gy, several valuable mutant lines with favorable characters, such as semidwarf, early maturity and high yield ability, were obtained. Experimental results suggest that the potential application of heavy ions in crop improvement is promising. Restriction-fragment-length-polymorphism (RFLP) analysis of two semidwarf mutants induced by argon particles revealed that large DNA alterations might be involved in these mutants.
Document ID
19940039061
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mei, M.
(South China Agricultural Univ. Guangzhou, CN, United States)
Deng, H.
(South China Agricultural Univ. Guangzhou, CN, United States)
Lu, Y.
(South China Agricultural Univ. Guangzhou, CN, United States)
Zhuang, C.
(South China Agricultural Univ. Guangzhou, CN, United States)
Liu, Z.
(Zhongshan Univ. Guangzhou, CN, United States)
Qiu, Q.
(Zhongshan Univ. Guangzhou, CN, United States)
Qiu, Y.
(South China Agricultural Univ. Guangzhou, CN, United States)
Yang, T. C.
(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
94A62510
Distribution Limits
Public
Copyright
Other

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