scholarly journals Novel Steroidal Glycosides from the Whole Plants of Helleborus foetidus

2020 ◽  
Vol 68 (3) ◽  
pp. 273-287
Author(s):  
Tomoki Iguchi ◽  
Yuka Uchida ◽  
Shingo Takano ◽  
Akihito Yokosuka ◽  
Yoshihiro Mimaki
Keyword(s):  
Helleborus Foetidus ◽  
Steroidal Glycosides ◽  
Whole Plants

scholarly journals Steroidal Glycosides from Convallaria majalis Whole Plants and Their Cytotoxic Activity

2017 ◽  
Vol 18 (11) ◽  
pp. 2358
Author(s):  
Yukiko Matsuo ◽  
Daisuke Shinoda ◽  
Aina Nakamaru ◽  
Kuni Kamohara ◽  
Hiroshi Sakagami ◽  
...  
Keyword(s):  
Cytotoxic Activity ◽  
Steroidal Glycosides ◽  
Convallaria Majalis ◽  
Whole Plants

Cytotoxic bufadienolides from the whole plants of Helleborus foetidus

2018 ◽  
Vol 23 ◽  
pp. 94-99 ◽  
Author(s):  
Akihito Yokosuka ◽  
Tomoki Iguchi ◽  
Riko Kawahata ◽  
Yoshihiro Mimaki
Keyword(s):  
Helleborus Foetidus ◽  
Whole Plants

Bufadienolides from the whole plants of Helleborus foetidus and their cytotoxicity

2020 ◽  
Vol 172 ◽  
pp. 112277 ◽  
Author(s):  
Tomoki Iguchi ◽  
Akihito Yokosuka ◽  
Riko Kawahata ◽  
Madoka Andou ◽  
Yoshihiro Mimaki
Keyword(s):  
Helleborus Foetidus ◽  
Whole Plants

Freeze-Fracture Studies of Membranes in Developing Sieve Elements in a Plant Tissue Culture

1980 ◽  
Vol 38 ◽  
pp. 636-637
Author(s):  
R. D. Sjolund ◽  
C. Y. Shih
Keyword(s):  
Plant Tissue ◽  
Cultured Cells ◽  
Freeze Fracture ◽  
Tissue Cultures ◽  
Sieve Elements ◽  
Intact Plants ◽  
Plant Tissue Cultures ◽  
Whole Plants ◽  
Energy Dependent ◽  
Similar Elements

The differentiation of phloem in plant tissue cultures offers a unique opportunity to study the development and structure of sieve elements in a manner that avoids the injury responses associated with the processing of similar elements in intact plants. Short segments of sieve elements formed in tissue cultures can be fixed intact while the longer strands occuring in whole plants must be cut into shorter lengths before processing. While iyuch controversy surrounds the question of phloem function in tissue cultures , sieve elements formed in these cultured cells are structurally similar to those of Intact plants. We are particullarly Interested In the structure of the plasma membrane and the peripheral ER in these cells because of their possible role in the energy-dependent active transport of sucrose into the sieve elements.

Structure and cytotoxicity of steroidal glycosides from Allium schoenoprasum

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
G Timité ◽  
AC Mitaine-Offer ◽  
T Miyamoto ◽  
C Tanaka ◽  
JF Mirjolet ◽  
...  
Keyword(s):  
Steroidal Glycosides ◽  
Allium Schoenoprasum

New steroidal glycosides from Dracaena marginata, Dracaena fragrans and Allium flavum

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
A Rezgui ◽  
AC Mitaine-Offer ◽  
T Miyamoto ◽  
C Tanaka ◽  
T Paululat ◽  
...  
Keyword(s):  
Steroidal Glycosides

FACTORS AFFECTING THE REGENERATION OF PEPPER (CAPSICUM ANNUUM L.)

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1120G-1120
Author(s):  
J. L. Jacobs ◽  
C. T. Stephens
Keyword(s):  
Growth Hormone ◽  
Silver Nitrate ◽  
Callus Formation ◽  
Leaf Explants ◽  
Regeneration System ◽  
Factors Affecting ◽  
Nitrate Concentrations ◽  
Leaf Differentiation ◽  
Whole Plants

Several growth hormone combinations and silver nitrate concentrations were examined for their effect on regeneration of different pepper genotypes. Primary leaf explants from in vitro seedlings were cultured on a revised Murashige and Skoog medium supplemented with auxin, cytokinin and 1.6% glucose. Combinations of different concentrations of indole-3-acetic acid (IAA), 0-5 mg/l, and 6-benzylaminopurine (BAP), 0-5 mg/l, were tested to determine the most effective medium for shoot primordium formation. Experiments with IAA and BAP did not result in a specific growth hormone combination appropriate for regeneration of all genotypes tested. Of the silver nitrate concentrations tested, 10 mg/l resulted in the best shoot and leaf differentiation and reduced callus formation. Differences in organogenic response of individual genotypes were evaluated on a single regeneration medium. Whole plants were regenerated from 11 of 63 genotypes examined. Based on these experiments, a reproducible regeneration system for pepper was developed with a total of 500 plants regenerated to date.

Ethephon for American Ginseng (Panax quiquefolium L.) Inflorescence Removal

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 481b-481
Author(s):  
A.E. Fiebig ◽  
J.T.A. Proctor ◽  
D. Murr ◽  
R. Releeder
Keyword(s):  
Additive Concentration ◽  
Root Mass ◽  
Panax Quinquefolium ◽  
Fruit Removal ◽  
Plant Damage ◽  
Low Concentrations ◽  
Production Practice ◽  
Whole Plants ◽  
Mass Increase ◽  
Standard Production

Varying concentrations (500-4000 mg·L–1) of ethephon, an ethylene-releasing compound, were applied to 3-year-old ginseng (Panax quinquefolium L.) plants in fields of southern Ontario. The effects of this chemical on fruit removal, plant damage, infructescence morphology, and root mass were studied and compared to the normal practice of manual inflorescence removal. The highest concentrations had the highest rates of removal but also caused the greatest amount of damage to the whole plants when compared to the mid-range concentrations. The lowest concentrations showed less foliar damage but did not provide sufficient fruit removal to mimic hand removal. When individual inflorescences of the ethephon treatments were studied, the seed heads had fewer ripe berries and more unpollinated florets than the untreated controls. When root masses were compared, high and low concentrations showed lower masses than those of the standard production practice of hand removal. However, mid range concentrations showed similar root mass increase to manual removal. When all parameters were considered, the concentration range giving the best results was 1000-1500 mg·L–1. Multiple applications of ethephon, at weekly intervals, had an additive effect on flower removal and plant damage. Treatments having an additive concentration of over 2000 mg·L–1 had detrimental effects on all parameters. Those within the 1000–1500 mg·L–1 range showed the highest similarity to the hand removal benefits.

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