The notochord

نویسنده

  • Derek L. Stemple
چکیده

the paper, I immediately understood that it was going to be possible to use Agrobacterium to make transgenic plants and that would, in turn, create many new opportunities. I concluded that plant molecular genetics was poised to take off and that insight, plus some nudging from Shauna, tipped me over the edge. What is your greatest frustration? I am frustrated by the influence of political organizations such as Greenpeace on public perception and acceptance of agricultural biotechnology. Although I think political confrontation as practiced by Greenpeace and others can be a useful activity in general, I think that they made a costly mistake in deciding to oppose biotechnology. I think agricultural biotechnology offers the best hope for addressing many of the most pressing environmental problems. It is challenging to carry out food policy debates in the media, when half of the consumers in the developed world are not sure whether a tomato normally has DNA. It is also unfortunate that the technology was developed by large chemical companies who had a poor record of environmental stewardship. This prevented a public debate in which biotechnology could be weighed against current practices, such as the use of chemicals, and also inevitably pitted environmental organizations against the technology for historical reasons. Unfortunately, the people who are paying the price for the political antics of organizations such as Greenpeace are the subsistence farmers of the developing world. What do you think is scientifically exciting? I am excited about finally being able to see all the genes required to make my favorite organism. I am also excited by the power of the tools we have — the genome sequence, indexed insertions, whole genome chips, tiling chips, chemical libraries, robust mass spectrometers and so forth. I want to know what all the genes do and how they work together to make and operate the organism. We have about 12,000 people working on Arabidopsis now, and if we could somehow distribute the work in an efficient way, we could discover the function of the roughly 26,000 genes in one or two grant cycles. There is not a shortage of people or tools — the problem is cultural. We need to use new ways of thinking about scientific goals to get the community to work on the genes of unknown function rather than on incremental studies of known processes. What is your main technical problem right now? Most …

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منابع مشابه

Developmental Changes of the Notochord and its Inductive Effects on the Adjacent Embryonic Germ Layers with Regard to the Role of Glycoconjugates

Notochord is an axial structure derived of embryonic mesoderm and in addition to structural supporting role in inducing nearby germinal layers, it has a basic role in formation of organs such as vertebral column, axial vessels, neural tube and primitive gut. This organ undergoes essential changes during the development process. First, arises from the primitive node and terms notochordal process...

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Distribution of Specific Glycoconjugates in Early Mouse Embryonic Notochord and Paraxial Mesenchyme

It is well known that glycoconjugate components of the cell surface and extracellular matrix, play an essential role(s) in many developmental phenomena such as cell differentiation, migration, and cellular interactions. The purpose of this study was to investigate distribution of this macromolecules during differentiation of the notochord and paraxial mesoderm. Formalin fixed paraffin sections ...

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Evaluation of effect of chick embryonic notochord on neural induction of mouse embryonic stem cells

Introduction: The aim of this study was evaluate the ability of notochord to induce neural induction and/or differentiation of mouse embryonic stem cell to neuron and motor neuron, respectively. Methods: In order to produce embryoid bodies, ES cells line Royan B1 were grown in suspension in the absence of LIF for 4 days. EBs were divided into 4 groups. EBs in group 1 & 2 were further cultur...

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Basic fibroblast growth factor induces notochord formation and the expression of As-T, a Brachyury homolog, during ascidian embryogenesis.

The tadpole larva of an ascidian develops 40 notochord cells in the center of its tail. Most of the notochord cells originate from the A-line precursors, among which inductive interactions are required for the subsequent differentiation of notochord. The presumptive-endoderm blastomeres or presumptive-notochord blastomeres themselves are inducers of notochord formation. Notochord induction take...

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Ras is an essential component for notochord formation during ascidian embryogenesis

In ascidian embryos, inductive interactions are necessary for the fate specification of notochord cells. Previous studies have shown that notochord induction occurs at the 32-cell stage and that basic fibroblast growth factor (bFGF) has notochord-inducing activity in ascidian embryos. In vertebrate, it is known that bFGF receptors have tyrosine kinase domain and the signaling pathway is mediate...

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Eph Regulates Dorsoventral Asymmetry of the Notochord Plate and Convergent Extension-Mediated Notochord Formation

BACKGROUND The notochord is a signaling center required for the patterning of the vertebrate embryonic midline, however, the molecular and cellular mechanisms involved in the formation of this essential embryonic tissue remain unclear. The urochordate Ciona intestinalis develops a simple notochord from 40 specific postmitotic mesodermal cells. The precursors intercalate mediolaterally and estab...

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عنوان ژورنال:
  • Current Biology

دوره 14  شماره 

صفحات  -

تاریخ انتشار 2004