We extend Ryan's seminal work on the 18-amino acid polypeptide systemin in tomato's (Solanum lycopersicum) systemic wound response to the closely related solanaceous species Solanum nigrum. We compared wild-type plants to plants transformed with an inverted repeat prosystemin construct (IRSys) to silence the expression of the endogenous S. nigrum prosystemin gene. In wild-type plants elicited w...

Background: Over the past few decades, there has been more interest in geminiviruses, especially begomoviruses, as many of the diseases they cause have now reached epidemic proportions. Weed plants serve as an alternative host for begomoviruses and may allow the transmission of begomovirus to other horticulture crops and medicinal plants thus enhances the host range of these viruses in differen...

The effect of methanolic plant extracts from Solanum nigrum, Acokanthera spectabilis and Heliotropium aegyptiacum were investigated on the larval mortality and development of Culex pipiens L. Also, the effects of the LC50 of the three plant extracts on the larval haemogram were studied. Plant extracts exhibited variable bioactivities. The greatest activity was observed for S. nigrum which showe...

To study the purification conditions of polysaccharide from Solanum nigrum L. by S-8 macroporous adsorption resin. The effect multi-factors on were studied static - dynamic and desorption methods with indexes rates. optimized process condition was as follows: concentration sample 5 mg/mL, pH level 7.0, temperature 30 °C, velocity 0.5 mL/min, maximun loading amount 10 BV, mol/L NaCl solution 5BV...

Various in vitro grown tissues (non-regenerative callus, regenerative callus and microshoot derived leaves) of Solanum nigrum L. were cultured under salinity stress (0-150 mM NaCl) for enhanced production of solasodine, a steroidal alkaloid and an alternative to diosgenin, which is used as a precursor for the commercial production of steroidal drugs. The role of plant growth regulators and vari...