Document Detail

Premature tapetum degeneration: a major cause of abortive pollen development in photoperiod sensitive genic male sterility in rice.
MedLine Citation:
PMID:  19686374     Owner:  NLM     Status:  MEDLINE    
Photoperiod-sensitive genic male-sterile (PSGMS) rice (Oryza sativa L.), a natural mutant found in the rice cultivar Nongken 58, is very useful for the development of hybrid rice cultivars. Despite its widespread use in breeding programs, the initial stage of the abortive development of PSGMS rice and the possible cytological mechanisms of pollen abortion have not been determined. In the present study, a systematic cytological comparison of the anther development of PSGMS rice with its normal fertile counterpart is conducted. The results show that pollen abortion in PSGMS rice first occurs before the pollen mother cell (PMC) stage, and continues during the entire process of pollen development until pollen degradation. The abortive process was closely associated with the abnormal behavior of the tapetum. Although tapetum degeneration in PSGMS rice initiates already at the PMC stage, it proceeds slowly and does not complete until the breakdown of the pollen. Such cytological observations were supported by the results of the TUNEL (TdT-mediated dUTP Nick End Labeling) assay, which detects DNA fragmentation resulting from programmed cell death (PCD), indicating that the premature tapetum degeneration is in the process of PCD.
Yinlian Shi; Sha Zhao; Jialing Yao
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of integrative plant biology     Volume:  51     ISSN:  1744-7909     ISO Abbreviation:  J Integr Plant Biol     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-18     Completed Date:  2009-10-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101250502     Medline TA:  J Integr Plant Biol     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  774-81     Citation Subset:  IM    
College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China.
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MeSH Terms
DNA Fragmentation
Flowers / cytology*,  genetics,  ultrastructure
Gene Expression Regulation, Plant / genetics,  physiology
In Situ Nick-End Labeling
Microscopy, Electron, Transmission
Oryza sativa / cytology*,  genetics,  ultrastructure
Plant Infertility / genetics*
Pollen / cytology,  genetics,  ultrastructure*

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