Transport of phenylalanine into vacuoles isolated from barley mesophyll protoplasts

Planta ◽  
1988 ◽  
Vol 176 (3) ◽  
pp. 378-382 ◽  
Author(s):  
U. Homeyer ◽  
G. Schultz
Keyword(s):  
Mesophyll Protoplasts

Incorporation of [14C]Phenylalanine and [14C] Cinnamic Acid into Leaf Pieces and Mesophyll Protoplasts from Oat Primary Leaves for Studies on Flavonoid Metabolism at the Tissue and Cell Level

1981 ◽  
Vol 36 (3-4) ◽  
pp. 222-233 ◽  
Author(s):  
Margareta Proksch
Keyword(s):  
Cinnamic Acid ◽  
Pulse Labelling ◽  
Acid Solutions ◽  
Cell Level ◽  
Abaxial Epidermis ◽  
Mesophyll Cells ◽  
Tissue Specific ◽  
Mesophyll Protoplasts ◽  
Main Site ◽  
End Products

When the abaxial epidermis was peeled from 5 to 6 day old oat primary leaves, and 3 cm segments were floated on radioactive phenylalanine or cinnamic acid solutions, more than 90 per cent of the radioactivity was incorporated within 3 to 7 h depending on the developmental stage of the leaf. C-glycosylflavones were labelled within 15 min and radioactivity in these compounds increased for several hours. Pulse labelling and pulse chase experiments with either phenylalanine or cinnamic acid, unequivocally demonstrate that oat flavones are stable end products of metabolism. However, this procedure does not distinguish between sequential biosynthesis of various flavones and their interconversion. Cinnamic acid was more efficiently (ca. 20 x) converted into oat leaf flavones than was phenylalanine, when the precursor was fed to leaf pieces, and flavones recovered from mesophyll protoplasts. Different labelling patterns were obtained with whole leaf segments and protoplasts which apparently reflect differences in tissue specific flavone biosynthesis of mesophyll and epidermis. Isolated mesophyll protoplasts incubated with [14C]cinnamic acid synthesize 14C-labelled flavones characteristic of the mesophyll, as well as several unidentified phenylpropanoid derivatives not found in the intact tissue. Data suggest that photosynthetically active mesophyll cells are a main site of tissue specific flavone biosynthesis

Isolation, Culture and Plant Regeneration From Protoplasts of Nicotiana debneyi

1980 ◽  
Vol 7 (6) ◽  
pp. 635 ◽  
Author(s):  
WR Scowcroft ◽  
PJ Larkin
Keyword(s):  
Acetic Acid ◽  
Plant Regeneration ◽  
Indole Acetic Acid ◽  
High Efficiency ◽  
Protoplast Culture ◽  
Callus Cultures ◽  
Dna Uptake ◽  
Mesophyll Protoplasts ◽  
Nicotiana Debneyi ◽  
Protoplast Division

Mesophyll protoplasts of two genetically distinct genotypes of N. debneyi were cultured with sustained division following a plating efficiency in excess of 50%. Fully fertile mature plants were regenerated from callus cultures derived from protoplasts. Shoots were induced in medium containing 1 mg/l 6-benzylaminopurine and 0.5 mg/I indole acetic acid. The repeatably high efficiency of protoplast culture was used to evaluate the quantitative effects of two drugs, kanamycin and trimethoprim, which effectively inhibited colony formation at concentrations of 100 and 50 �g/ml, respectively. An enhancer of DNA uptake, poly-L-ornithine, had virtually no effect on sustained protoplast division at a concentration of 7.5 �g/ml or less.

scholarly journals Quantitative confocal imaging method for analyzing cellulose dynamics during cell wall regeneration in Arabidopsis mesophyll protoplasts

Plant Direct ◽  
2017 ◽  
Vol 1 (6) ◽  
pp. e00021 ◽  
Author(s):  
Hiroaki Kuki ◽  
Takumi Higaki ◽  
Ryusuke Yokoyama ◽  
Takeshi Kuroha ◽  
Naoki Shinohara ◽  
...  
Keyword(s):  
Cell Wall ◽  
Confocal Imaging ◽  
Imaging Method ◽  
Cell Wall Regeneration ◽  
Mesophyll Protoplasts ◽  
Wall Regeneration

scholarly journals Energization of the Sugar Transport Mechanism in the Plasmalemma of Isolated Mesophyll Protoplasts

1980 ◽  
Vol 65 (3) ◽  
pp. 550-553 ◽  
Author(s):  
Micha Guy ◽  
Leonora Reinhold ◽  
Michaela Rahat
Keyword(s):  
Transport Mechanism ◽  
Sugar Transport ◽  
Mesophyll Protoplasts
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