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Evidence for Involvement of Photosynthetic Processes in the Stomatal Response to CO21
Results suggest that part of the stomatal response to ci involves the balance between photosynthetic electron transport and carbon reduction either in the mesophyll or in guard cell chloroplasts.
Centrosome and microtubule dynamics during meiotic progression in the mouse oocyte.
The existence of two discrete populations of centrosomes in the mouse oocyte that are coordinately regulated to subserve aspects of microtubule organization relative to both nuclear and cytoplasmic events is suggested.
Sorting and reorganization of centrosomes during oocyte maturation in the mouse
- M. J. Carabatsos, C. Combelles, S. Messinger, D. Albertini
- BiologyMicroscopy research and technique
- 1 June 2000
Although pericentrin incorporation is not required for meiotic spindle formation, the dynamic reorganization ofPericentrin and changes in centrosome microtubule nucleating capacity are involved in critical cell cycle transitions during meiotic maturation.
Evidence for complex, collective dynamics and emergent, distributed computation in plants
- D. Peak, Jevin D. West, S. Messinger, K. Mott
- Environmental ScienceProc. Natl. Acad. Sci. USA
- 27 January 2004
Using sequences of chlorophyll fluorescence images from leaves of Xanthium strumarium L. (cocklebur), spatial and temporal correlations in stomatal dynamics are quantified and are consistent with the proposition that a plant solves its optimal gas exchange problem through an emergent, distributed computation performed by its leaves.
The influence of host demography, pathogen virulence, and relationships with pathogen virulence on the evolution of pathogen transmission in a spatial context
The impact of ecology can still be understood within the conceptual framework arising from spatial moment equations, that of “self-shading’’, whereby the spread of highly transmissible pathogens is impeded by local depletion of susceptible hosts.
Early embryonic development in the Djungarian hamster (Phodopus sungorus) is accompanied by alterations in the distribution and intensity of an estrogen (E2)-dependent oviduct glycoprotein in the…
In early cleavage-stage hamster embryos, the intensity and pattern of staining for an E2-dependent oviduct protein (M(r) 200,000) that is released into the Oviduct lumen during embryo transport can be distinguished on the basis of membrane f-actin display and blastomere number and shape.
Oviduct during early pregnancy: Hormonal regulation and interactions with the fertilized ovum
The regulation of these secretory alterations during the first few days of pregnancy is discussed with respect to the influence of the ovarian steroids, their interactions with the embryo microenvironment, and the possible ways in which they may mediate the critical reproductive events of fertilization and embryo development.
Nuclear and Cytoplasmic Changes During Oocyte Maturation
To what extent the developmental blueprint for embryogenesis is coupled with the process of meiosis itself is not at all clear, although insights into this interrelationship on a mechanistic level have derived from recent studies on the determinants of embryonic polarity evident at the terminal phases of oogenesis.
The Consequences of Spatial Structure for the Evolution of Pathogen Transmission Rate and Virulence
A growing body of theoretical studies suggesting that spatial structure can lead to the evolution of an intermediate pathogen transmission rate and virulence are reviewed, and it is suggested that when spatial structure exists, it can dominate over the shape of the transmission‐virulence trade‐off in determining pathogen traits.
Effects of the insecticide phosmet on solitary bee foraging and nesting in orchards of Capitol Reef National Park, Utah.
- D. Alston, V. Tepedino, Brosi A. Bradley, T. R. Toler, T. Griswold, S. Messinger
- MedicineEnvironmental entomology
It is shown that M. rotundata is negatively affected by phosmet spraying and suggested that caution should be exercised in its use in areas where bees are apt to forage, and recorded a rich bee fauna in the orchards and on plants nearby.