Document Detail


Male-sterility of thermosensitive genic male-sterile rice is associated with premature programmed cell death of the tapetum.
MedLine Citation:
PMID:  12692728     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The tapetum plays a crucial role in pollen development. This secretory tissue produces numerous nutritive proteins necessary for pollen maturation. The tapetum, whose cells undergo programmed cell death (PCD), is completely diminished by the time the pollen is fully mature. Our previous studies on a thermosensitive genic male-sterile (TGMS) rice (Oryza sativa L.) suggested that male-sterility was due to failure in pollen development. In this paper we describe how further analysis of the TGMS rice revealed that male-sterility is associated with premature PCD of the tapetum. Cytological observations of TGMS rice anthers at various developmental stages indicated that PCD initiates at an early stage of pollen development and continues until the tapetal cells are completely degraded, resulting in pollen collapse. Transmission electron microscopy showed the morphologically distinct hallmarks of apoptosis, including cytoplasmic shrinkage, membrane blebbing, and vacuolation. Identification of DNA fragmentation using the TUNEL assay supports the hypothesis that premature PCD is associated with male-sterility in the rice. The tissue-specific feature of the thermosensitive genic male-sterile phenotype is discussed with regard to PCD during anther development.
Authors:
Sujin Ku; Hyejin Yoon; Hak Soo Suh; Yong-Yoon Chung
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-04-12
Journal Detail:
Title:  Planta     Volume:  217     ISSN:  0032-0935     ISO Abbreviation:  Planta     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-08-07     Completed Date:  2004-01-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1250576     Medline TA:  Planta     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  559-65     Citation Subset:  IM    
Affiliation:
School of Life Sciences and Biotechnology, Korea University, 136-701 Seoul, Korea.
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MeSH Terms
Descriptor/Qualifier:
Apoptosis / genetics,  physiology*
DNA Fragmentation
Fertility / genetics,  physiology
Flowers / genetics,  growth & development*,  ultrastructure
In Situ Nick-End Labeling
Microscopy, Electron
Oryza sativa / genetics,  growth & development*,  metabolism
Phenotype
Temperature

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


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