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Phosphatized Polar Lobe-Forming Embryos from the Precambrian of Southwest China

Chen, Jun-Yuan and Bottjer, David J. and Davidson, Eric H. and Dornbos, Stephen Q. and Gao, Xiang and Yang, Yong-Hua and Li, Chia-Wei and Li, Gang and Wang, Xiu-Qiang and Xian, Ding-Chang and Wu, Hung-Jen and Hwu, Yeu-Kuang and Tafforeau, Paul (2006) Phosphatized Polar Lobe-Forming Embryos from the Precambrian of Southwest China. Science, 312 (5780). pp. 1644-1646. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20141121-115203718

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Abstract

In developing embryos of some extant spiralian animals, polar lobe formation is one of the symmetry-breaking mechanisms for segregation of maternal cytoplasmic substances to certain blastomeres and not others. Polar lobe formation leads to unique early cleavage morphologies that include trilobed, J-shaped, and five-lobed structures. Fossil embryos similar to modern lobeforming embryos are recognized from the Precambrian Doushantuo Formation phosphates, Weng'an, Guizhou Province, China. These embryos are abundant and form a developmental sequence comparable to different developing stages observed in lobe-forming embryos of extant spiralians. These data imply that lobe formation is an evolutionarily ancient process of embryonic specification.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.1125964DOIArticle
http://www.sciencemag.org/content/312/5780/1644PublisherArticle
http://www.sciencemag.org/content/312/5780/1644/suppl/DC1PublisherSupporting Information
ORCID:
AuthorORCID
Li, Gang0000-0001-9313-251X
Additional Information:© 2006 American Association for the Advancement of Science. 8 February 2006; Accepted 27 April 2006. Supported by Chinese Academy of Science grant KZCX3-SW-141; National Science Foundation of China grants 42432006, 40302004, 10490190, 60172042, and 10490194; 111 Project and 985-2 Project of Nanjing University, LPS of Nanjing Institute of Geology & Paleontology, NASA/Ames grant NAG2-1541, and an NSC grant. We thank the European Synchrotron Radiation Facility, Taiwan NSRRC, and Beijing Synchrotron Radiation Facility and Photon Factory for provision of synchrotron radiation facilities.
Funders:
Funding AgencyGrant Number
Chinese Academy of Sciences KZCX3-SW-141
National Science Foundation of China42432006
National Science Foundation of China40302004
National Science Foundation of China10490190
National Science Foundation of China60172042
National Science Foundation of China10490194
111 ProjectUNSPECIFIED
Nanjing University985-2
Nanjing Institute of Geology & PaleontologyUNSPECIFIED
NASANAG2-1541
National Science Council (Taipei)UNSPECIFIED
Issue or Number:5780
Record Number:CaltechAUTHORS:20141121-115203718
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141121-115203718
Official Citation:Chen, J.-Y., Bottjer, D. J., Davidson, E. H., Dornbos, S. Q., Gao, X., Yang, Y.-H., . . . Tafforeau, P. (2006). Phosphatized Polar Lobe-Forming Embryos from the Precambrian of Southwest China. Science, 312(5780), 1644-1646. doi: 10.1126/science.1125964
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52046
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:21 Nov 2014 21:04
Last Modified:09 Mar 2020 13:19

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