VARIABLE CELL POSITIONS AND CELL CONTACTS UNDERLIE MORPHOLOGICAL EVOLUTION OF THE RAYS IN THE MALE TAILS OF NEMATODES RELATED TO CAENORHABDITIS-ELEGANS

被引:40
作者
FITCH, DHA [1 ]
EMMONS, SW [1 ]
机构
[1] ALBERT EINSTEIN COLL MED, DEPT MOLEC GENET, BRONX, NY 10461 USA
关键词
D O I
10.1006/dbio.1995.1237
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
As a first step toward understanding their mechanism of morphological evolution, we compare the morphology and development of the male genitalia in 10 species of Rhabditidae, the family of nematodes that includes Caenorhabditis elegans. We describe a number of variable morphological characteristics and focus in particular on the differing arrangements of the caudal papillae or rays within the acellular fan. We analyze the development of the ray cells within the epidermis of the last larval stage and identify changes in cell positions and cell contacts that underlie evolutionary changes in the arrangement of the rays. Epidermal cell positions were determined by means of indirect immunofluorescence staining with a monoclonal antibody directed towards adherens junctions. Similarities between the species in the cellular arrangements during the earliest developmental stages allow us to propose homologies between the rays in different species, Evolutionary changes in the positions and order of homologous rays are correlated with shifts in cell positions during development. The results suggest that genes for cell. recognition or adhesion proteins, or pattern formation genes that regulate cell recognition or adhesion proteins, may be important foci of evolutionary change affecting morphology. (C) 1995 Academic Press, Inc.
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页码:564 / 582
页数:19
相关论文
共 56 条
[1]   HETEROCHRONIC MUTANTS OF THE NEMATODE CAENORHABDITIS-ELEGANS [J].
AMBROS, V ;
HORVITZ, HR .
SCIENCE, 1984, 226 (4673) :409-416
[2]  
Ambros V., 1987, Development as an Evolutionary Process. MBL Lectures in Biology, vol.8, P139
[3]  
Andrassy I., 1983, A taxonomic review of the suborder Rhabditina (Nematoda: Secernentia).
[4]  
BAIRD SE, 1990, GENETICS, V126, P335
[5]   CAENORHABDITIS-VULGARIS SP-N (NEMATODA, RHABDITIDAE) - A NECROMENIC ASSOCIATE OF PILL BUGS AND SNAILS [J].
BAIRD, SE ;
FITCH, DHA ;
EMMONS, SW .
NEMATOLOGICA, 1994, 40 (01) :1-11
[6]  
BAIRD SE, 1991, DEVELOPMENT, V113, P515
[7]   THE MATERNAL GENE SKN-1 ENCODES A PROTEIN THAT IS DISTRIBUTED UNEQUALLY IN EARLY C-ELEGANS EMBRYOS [J].
BOWERMAN, B ;
DRAPER, BW ;
MELLO, CC ;
PRIESS, JR .
CELL, 1993, 74 (03) :443-452
[8]  
BRENNER S, 1974, GENETICS, V77, P71
[9]   Genome sequence of the nematode C-elegans:: A platform for investigating biology [J].
不详 .
SCIENCE, 1998, 282 (5396) :2012-2018
[10]   PATTERN-FORMATION AND EYESPOT DETERMINATION IN BUTTERFLY WINGS [J].
CARROLL, SB ;
GATES, J ;
KEYS, DN ;
PADDOCK, SW ;
PANGANIBAN, GEF ;
SELEGUE, JE ;
WILLIAMS, JA .
SCIENCE, 1994, 265 (5168) :109-114