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Alteration of Starch-Sucrose Transition in Germinating Wheat Seed under Sodium Chloride Salinity
Kashem, Mohammad Abul,Sultana, Nilufa,Ikeda, Takeshi,Hori, Hidetaka,Loboda, Tadeusz,Mitsui, Toshiaki 한국식물학회 2000 Journal of Plant Biology Vol.43 No.3
Alterations in starch-sucrose transition during germination were studied in wheat seeds under saline conditions. NaCl significantly reduced the speed of germination and resultant seedling growth, but delayed the degradation of seed storage components. The endogenous level of ABA increased while osmotic potential decreased. NaCl also inhibited the expression of α-amylase. Increasing the concentration of NaCl induced the expression of sucrose phosphate synthase, and sugars, including sucrose, were accumulated in the seedlings. This accumulation of sugar closely correlated with an increase in ABA. However, sugar accumulation was reversible when the salt stress was removed. Overall our results strongly suggest that the germinating wheat seeds alter the starch-to-sucrose conversion to adapt for salt stress. This is probably mediated by the increase in ABA.
Md Abdus Shahid,Abdur Rahim,Mohammad Asaduzzaman Chowdhury,Mohammad Abul Kashem 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.2
Nigella sativa (N. sativa) is extensively used as medicinal plant all over the world. It has the potential properties as the antiviral and antibacterial application. Its seed contain thymoquinone (TQ), thymohydroquinone (THQ), thymol (THY), p-cymene as major and other minor components. TQ and THQ exhibit broad spectrum of antimicrobial properties against the activity of bacteria, viruses, parasites, schistosoma and fungi. This work provides credence to the fabrication of antibacterial nanofibrous membrane by electrospinning machine from N. sativa extract with polyvinyl alcohol (PVA) solution for wound dressing. The morphology of the developed membrane is also characterized using scanning electron microscope. Fourier transform infrared spectroscopy (FTIR) data has been showed that the functional groups of N. sativa are present in the prepared PVA-N. sativa nanofibrous membrane and its antibacterial activity was investigated. The disk diffusion method has been used to evaluate the antibacterial activity of PVA-N. sativa nanofibrous membrane against Staphylococcus aureus (S. aureus) bacteria and the inhibition zone with a value of 10 mm is formed. Considering the inherent properties of N. sativa, a conceptual reaction mechanism has been proposed to deactivate the viral proteins by the action of TQ and THQ.