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Full-Text Articles in Cell Biology

The Electrical Response Of Maize To Auxin, Hubert Felle, Winfried Peters, Klaus Palme May 1991

The Electrical Response Of Maize To Auxin, Hubert Felle, Winfried Peters, Klaus Palme

Winfried S. Peters

The electrical response of Zea mays coleoptiles and suspension cultured cells to several growth-promoting auxins (IAA, IBA, 2,4-D, 2,4,5-T, 1-NAA) and some of their structural analogues (2,3-D, 2-NAA) has been tested. In coleoptiles two typical electrical responses to IAA are observed: an immediate rapid depolarization, and a hyperpolarization following 7–10 minutes after the first external addition of IAA. Of the other tested compounds only 1-NAA significantly depolarized the cells, whereas all auxins as well as the analogues evoked delayed hyperpolarizations. In contrast, the suspension cells were not hyperpolarized by any of the tested compounds, but ...


In Vitro Culture Systems Of Hybrid Aspen As Tools For Tree Improvement Programs And Commercial Applications , Sung Ho Son Jan 1991

In Vitro Culture Systems Of Hybrid Aspen As Tools For Tree Improvement Programs And Commercial Applications , Sung Ho Son

Retrospective Theses and Dissertations

Tree improvement programs have two important components: (1) induction of desirable types of genetic variation by breeding, and (2) selection and maintenance of the traits by sexual or asexual propagation methods. By combining tissue culture systems and morden DNA technology with conventional breeding methods, both aspects of tree improvement will benfit. New tissue culture systems are also important to the development of commercial applications of improved trees;Therefore, several new approaches to the in vitro culture of hybrid aspen (Populus alba L. x P. grandidentata Michx. 'Crandon') were studied. To investigate multiple shoot regeneration capacity of different cells, tissues, and ...