In vitro culture of Cucumis sativus L. XVIII. Plants from protoplasts through direct somatic embryogenesis

1995 ◽  
Vol 41 (3) ◽  
pp. 259-266 ◽  
Author(s):  
W. Burza ◽  
S. Malepszy
2014 ◽  
Vol 69 (4) ◽  
pp. 245-250 ◽  
Author(s):  
Joanna Makowczyńska ◽  
Emilia Andrzejewska-Golec

Early stages of direct somatic embryogenesis in <em>Plantago asiatica</em> were observed by light microscopy. In calli of <em>Plantago asiatica</em> two phenomena occurred simultaneously: somatic organogenesis and somatic embryogenesis.


2014 ◽  
Vol 63 (3-4) ◽  
pp. 265-268 ◽  
Author(s):  
W. Burza ◽  
B. Woźniak ◽  
J. A. Tarkowska ◽  
S. Malepszy

The development of protoplast derived from somatic embryos and some of their characteristics were compared with embryos from suspension and in vivo in the same B line. Embryos formed in a protoplast culture differed from others that their younger stages contained vacuolated cells, and older ones had altered morphological and histological structure. Somatic embryogenesis is more regular from suspension then from protoplasts. No distinct differences were observed in the rate of embryo development in vivo and in vitro, and in vitro embryos show a larger variation in size at the same stage. Embryos in vitro with fluorescence are generally larger than zygotic ones at each stage. The use of fluorescence is suggested for the selection of heterokariocytes after protoplast fusion.


1989 ◽  
Vol 78 (6) ◽  
pp. 836-840 ◽  
Author(s):  
A. Nadolska-Orczyk ◽  
S. Malepszy

2014 ◽  
Vol 56 (1) ◽  
pp. 55-60 ◽  
Author(s):  
Anna Nadolska-Orczyk ◽  
Stefan Malepszy

The developmental sequence of callus initiation and somatic embryogenesis in leaf explants of <em>Cucumis sativus</em> cv. Borszczagowski was analysed and compared on media containing two different auxin phenoxy-derivatives (2,4-D and 2,4,5-T) and cytokinin (BAP or 2iP). During the first 20 days of culture on media with 2,4,5-T proliferation of parenchymatic tissue occurred mainly and only small meristematic centers were observed. There was an intensive detachment of parenchymatic cells and dissociation of their cell walls near vessels and in the lower part of the explant adjacent to the medium. These cells were strongly plasmolysed. On the 2,4-D containing medium mostly meristematic tissue developed, proliferating around vascular bundles and forming meristematic centers or promeristem-like structures. After 35-50 days of culture, secondary callus was formed by separation of meristematic cells from the meristem surface in explants cultured on the 2,4-D containing medium. On medium supplemented with 2, 4, 5-T the detachment of parenchymatic and meristematic cells occurred, along with formation of a gel-like substance. The gel-like callus contained multi-cellular aggregates, proembryoids and embryoids. This type of callus tissue was initiated more intensively on medium with 2, 4, 5-T, but the frequency of somatic embryogenesis was much lower. The periferial cells of aggregates, proembryoids and embryoids showed the tendency to separate from the surface of the tissue. Many embryoids formed adventitious embryos.


2006 ◽  
Vol 1 (3) ◽  
pp. 110-117 ◽  
Author(s):  
Vasudevan Ayyappan . ◽  
Selvaraj Natesan . ◽  
Ganapathi Andy . ◽  
Chang won Choi . ◽  
Manickavasagam Marka . ◽  
...  

2006 ◽  
pp. 155-160 ◽  
Author(s):  
N. Selvarai ◽  
A. Ganapath ◽  
A. Vasudevan ◽  
G. Vengadesan ◽  
S. Kasthuri Rengan

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