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EXTERNAL AND INTERNAL CONTROL IN PLANT DEVELOPMENT

Journal of Systems Science & Complexity 2003年第3期16卷 339-349页

作者： BeátaOborny Department

Bodies of plants are modularly organized. Development proceeds by adding new modules to open endings with a potential for branching. Each module is autonomous to some extent. Development relies on the self-organized patterns that emerge from the interactions of individual modules. Interactions include both competition and cooperation,and several types of positive and negative feedback loops are involved. Development can be open to external influences, thus enabling the plant to adjust its form to the environment,for example, to the spatial distribution of ecological resources. This paper provides a review on adaptive plasticity in plants.

关键词： developmental plasticity self-organized pattern phenotypic variation plant morphogenesis physiological integration modular structure.

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NMDA receptors regulate formation of developmental callosal circuits

NMDA receptors regulate formation of developmental callosal ...

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中国神经科学学会第十二届全国学术会议

作者： Jing Zhou Samuel J.Pleasure UCSF Department of Neurology Programs in Neuroscience and Developmental Stem Cell Biology

During development the somatosensory cortex of one hemisphere projects to the homotypic portion of the opposite hemisphere via the corpus callosum. This projection forms in the first postnatal week and there is a critical period during which loss of sensory information will lead to disruption of this callosal projection. We have found that early genetic disruption of the NMDA receptor NR1 subunit in neurons that project from one hemisphere to the other disrupts the orderly formation of this circuit. In addition, we found that by infusing antibodies targeting the extracellular domain of NR1 from P0-P8 in mice that we could block formation of the same circuit. Interestingly, upon ceasing antibody infusion the callosal projection corrects itself over time. In addition to the developmental significance of this work there are important clinical implications. There are many patients who develop anti-NMDAR autoantibody-mediated encephalitis both in adulthood and during development. This implies that this disorder likely disrupts the structural formation of cortical circuits but that some of these effects may be reversible with treatment.

关键词： developmental plasticity critical period corpus callosum encephalitis autoimmune

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Does the variance of incubation temperatures constitute a selective force for the origin of reptilian viviparity?

Does the variance of incubation temperatures constitute a se...

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第七届全国野生动物生态与资源保护学术研讨会

作者： Hong Li,Zheng Wang,Ce Chen,Xiang Ji (Jiangsu Key Laboratory for Biodiversity and Biotechnology,College of Life Sciences,Nanjing Normal University,Nanjing 210046,Jiangsu,China)

It has been hypothesized that the variance of temperatures experienced during embryonic development may have constituted a significant selective force for the evolution of viviparity in *** test this idea,we incubated... 详细信息

关键词： Scincid lizard developmental plasticity Viviparity Phenotype Incubation length Thermal condition

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