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Full-Text Articles in Life Sciences
The Extrafloral Nectaries Of Ipomoea Carnea (Convolvulaceae), Kathleen H. Keeler
The Extrafloral Nectaries Of Ipomoea Carnea (Convolvulaceae), Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
lpomoea carnea (Convolvulaceae) possesses two types of extrafloral nectaries, located on the petiole and on the pedicel. These secrete a complex nectar containing sugars and amino acids. The insects attracted to the extrafloral nectaries are predominantly ants and they are relatively abundant throughout the year. A number of incidents of plant defense as a result of the presence of extrafloral nectary visitors at the extrafloral nectaries of I. carnea were observed and are consistent with the ant-guard theory of the function of extrafloral nectaries.
Enucleation And Reconstruction Of Interferon-Producing Cells, D. C. Burke, G. Veomett
Enucleation And Reconstruction Of Interferon-Producing Cells, D. C. Burke, G. Veomett
School of Biological Sciences: Faculty Publications
Enucleation of L cells leads to loss of the capacity to produce interferon, showing that the cell nucleus is essential for interferon formation. However, when the cells were enucleated while interferon formation was proceeding, the cytoplasts were capable of continuing to synthesize interferon by a process shown to be protein synthesis, showing that the interferon messenger RNA leaves the nucleus after synthesis. Reconstructed cells were obtained by Sendai virus fusion of karyoplasts and cytoplasts. Such reconstructed cells were capable of producing at least as much interferon (43 interferon units/104 nucleated cells) as control cells (31 interferon units/104 nucleated …
Hormdne-Inducible Casein Messenger Rna In A Serum-Free Organ Culture Of Whole Mammary Gland, P. M. Terry, M. R. Banerjee, R. M. Lui
Hormdne-Inducible Casein Messenger Rna In A Serum-Free Organ Culture Of Whole Mammary Gland, P. M. Terry, M. R. Banerjee, R. M. Lui
School of Biological Sciences: Faculty Publications
The whole second thoracic mammary gland of estradiol-17β + progesterone primed 3- to 4-week-old BALB/c female mice was induced to pregnancy-like lobulo-alveolar morphogenesis after 6-day cultivation in a serum-free culture medium containing a "growth promoting" hormone mixture, insulin + prolactin + growth hormone (somatotropin) + estradiol + progesterone. No radioimmunologically detectable casein was present in these glands. Subsequent cultivation for another 6 days in a "lactogenic" medium with the hormones insulin + prolactin + cortisol produced abundant milk-like secretory material in the alveolar lumen. RNA of the mammary gland after estradiol + progesterone priming or cultivation in the "growth-promoting" medium …