Isolation and characterisation of satellite DNA from Brassica juncea (L.) Czern.
Nuclear DNA isolated from hypocotyls (H), proliferating callus (PC) and differentiating callus (DC) of Brassica juncea contains a satellite DNA which can be resolved in actinomycin-D/CsCl gradients. The satellite DNA undergoes changes, when an in vitro culture is raised from hypocotyl tissue and forms a higher percentage of the genome in PC and DC than in mature differentiated tissue (hypocotyl). All the three satellite DNAs are GC-rich compared to main band DNAs. Satellite DNA of H has higher Tm and GC content than that of the PC and DC satellites. A 200 bp basic repeat unit from hypocotyl nuclear DNA has been cloned and characterised.
Reddy
A S
AS
Upadhyaya
K C
KC
Guha-Mukherjee
S
S
D001937:Brassica / Q000166:cytology / Q000235:genetics*; D002454:Cell Differentiation / Q000235:genetics; D002455:Cell Division / Q000235:genetics; D046508:Culture Techniques; D004276:DNA, Satellite / Q000302:isolation & purification
D004276:DNA, Satellite