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3 matches found in 2 documents. Search time: 0.187 seconds.
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Score: 2.00
Title: Wax-deficient anther1 is involved in cuticle and wax production in rice anther walls and is required for pollen development .
Author: Jung KH Han MJ Lee DY Lee YS Schreiber L Franke R Faust A Yephremov A Saedler H Kim YW Hwang I An G
Journal: Plant Cell Citation: V : 18 ( 11 ) P : 3015-32 Year: 2006 Type: ARTICLE
Literature: oryza Field: abstract Doc ID: pub17138699 Accession (PMID): 17138699
Abstract: In vegetative leaf it issues , cuticles including cuticular waxes are important for protection against nonstomatal water loss and pathogen infection as well as for adaptations to environmental stress . However , their roles in the anther wall are rarely studied . The innermost layer of the anther wall ( the tapetum ) is essential for generating male gametes . Here , we report the characterization of a T-DNA insertional mutant in the Wax-deficient anther1 ( Wda1 ) gene of rice ( Oryza sativa ) , which shows significant defects in the biosynthesis of very-long-chain fatty acids in both layers . This gene is strongly expressed in the epidermal cells of anthers . Scanning electron microscopy analyses showed that epicuticular wax crystals were absent in the outer layer of the anther and that microspore development was severely retarded and finally disrupted as a result of defective pollen exine formation in the mutant anthers . These biochemical and developmental defects in tapetum found in wda1 mutants are earlier events than those in other male-sterile mutants , which showed defects of lipidic molecules in exine . Our findings provide new insights into the biochemical and developmental aspects of the role of waxes in microspore exine development in the tapetum as well as the role of epicuticular waxes in anther expansion .
Matching Sentences:
[ Sen. 4, subscore: 1.00 ]: Here , we report the characterization of a T-DNA insertional mutant in the Wax-deficient anther1 ( Wda1 ) gene of rice ( Oryza sativa ) , which shows significant defects in the biosynthesis of very-long-chain fatty acids in both layers .
[ Sen. 7, subscore: 1.00 ]: These biochemical and developmental defects in tapetum found in wda1 mutants are earlier events than those in other male-sterile mutants , which showed defects of lipidic molecules in exine .
Supplemental links/files: reference in endnote online text related articles pubmed citation
Score: 1.00
Title: The Post-meiotic Deficicent Anther1 ( PDA1 ) gene is required for post-meiotic anther development in rice .
Author: Hu L Tan H Liang W Zhang D
Journal: J Genet Genomics Citation: V : 37 P : 37-46 Year: 2010 Type: MEDLINE
Literature: oryza Field: abstract Doc ID: pub20171576 Accession (PMID): 20171576
Abstract: To understand the molecular mechanism of male reproductive development in the model crop rice , we isolated a complete male sterile mutant post-meiotic deficient anther1 ( pda1 ) from a gamma-ray-treated rice mutant library . Genetic analysis revealed that the pda1 mutant was controlled by a recessive nucleus gene . The pda1 mutant anther seemed smaller with white appearance . Histological analysis demonstrated that the pda1 mutant anther undergoes normal early tapetum development without obvious altered meiosis . However , the pda1 mutant displayed obvious defects in postmeiotic tapetal development , abnormal degeneration occurred in the tapetal cells at stage 9 of anther development . Also we observed abnormal lipidic Ubisch bodies from the tapetal layer of the pda1 mutant , causing no obvious pollen exine formation . RT-PCR analysis indicated that the expression of genes involved in anther development including GAMYB , OsC4 and Wax-deficient anther1 ( WDA1 ) was greatly reduced in the pda1 mutant anther . Using map-based cloning approach , the PDA1 gene was finely mapped between two markers HLF610 and HLF627 on chromosome 6 using 3 , 883 individuals of F ( 2 ) population . The physical distance between HLF610 and HLF627 was about 194 kb . This work suggests that PDA1 is required for post-meiotic tapetal development and pollen/microspore formation in rice .
Matching Sentences:
[ Sen. 7, subscore: 1.00 ]: RT-PCR analysis indicated that the expression of genes involved in anther development including GAMYB , OsC4 and Wax-deficient anther1 ( WDA1 ) was greatly reduced in the pda1 mutant anther .
Supplemental links/files: reference in endnote online text related articles pubmed citation
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