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callus cell
The concentration of cytochrome P450 and ecdysone 20-monooxygenase activity in plants and callus cell culture of carpet bugleweed Ajuga reptans L.
      
It was demonstrated that the content of ecdysteroids in callus cell culture is higher than in the intact plant, with concurrent retention of a high ecdysone-20-monooxygenase activity.
      
All other cell lines contain a ribosome inhibitor, although only two callus cell lines show detectable amounts of immunoreactive proteins at the same Mr as dodecandrin.
      
Therefore, it appears that the ability of callus cell to differentiate into somatic embryos increases in the following order: octoploid >amp;lt; diploid >amp;lt; tetraploid.
      
The observed site of somatic embryo origin (SSEO) could originate from a superficial callus cell, possibly indicating a unicellular origin, or from epidermal and subepidermal callus cells, representing a multicellular origin.
      
Histological observations showed a distinct multicellular origin for most of the somatic embryos as they developed from epidermal, sub-epidermal and inside callus cells, while a few of them originated from a superficial callus cell.
      
Accordingly, the pectic fraction (acid-soluble) predominant in both calli was acetyl-esterified to 85% in friable callus and to 22% in compact callus cell walls.
      
A ribonuclease from a callus cell culture of Panax ginseng C.A.
      
Continual callus selection was required to produce mostly dedifferentiated, slow-growing callus cell lines.
      
Varying the nitrogen source in the nutrient medium caused no obvious effect on callus cell structure.
      
Petiole segments and greenwood cuttings responded by massive callus cell proliferation without adventitious shoot formation.
      
An air-comparison pycnometer has been found to be useful in measuring the true volume of callus cell cultures.
      
Effects of growth regulators on callus cell growth, plant regeneration, and somaclonal variation of smooth bromegrass (Bromus in
      
Callus cell suspension cultures derived from transformed plants secrete functional scFv protein into the surrounding medium.
      
Ascorbate oxidase activity and immunoreactivity were evaluated in crude tissue extracts obtained from callus cell cultures induced by green zucchini sarcocarp and grown in the presence of tunicamycin, a powerful N-glycosylation inhibitor.
      
 

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