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Effect of natural and synthetic growth stimulators on <i>in vitro</i>rooting and acclimatization of common ash (<i>Fraxinus excelsior</i>L.) microplants
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作者 Vadim Lebedev Konstantin Schestibratov 《Natural Science》 2013年第10期1095-1101,共7页
Application of growth stimulators can be especially effective on plantlets in vitro of tree species which are usually worse rooted and adapted in comparison with annual plants. In our work we evaluate effects of natur... Application of growth stimulators can be especially effective on plantlets in vitro of tree species which are usually worse rooted and adapted in comparison with annual plants. In our work we evaluate effects of natural (dihydroquercetin, Zircon) and synthetic growth stimulators (Melafen, Fumar, Epin-Extra) on rooting and acclimatization of common ash (Fraxinus excelsior L.) microplants. The 0.05% -?0.2% Zircon and 10-5%?Melafen enhanced in vitro rooting by 29% -?37% and 31%, respectively. Melafen also stimulated root formation faster compared to control plants. The dihydroquercetin concentration of 0.01% increased rooting by 24% and root number per shoot by 1.8 times. In vitro plants rooted on media supplemented with Melafen, Fumar and Zircon demonstrated enhanced ability to adapt to non-sterile conditions and accelerated growth. Two months after planting to the greenhouse, plants rooted on 0.01% dihydroquercetin were 45% taller than the control. Weekly spraying of plantlets with 0.02% Epin-Extra containing 24-epibrassinolid stimulated growth of uniform plants with large leaves. The obtained results support the use of growth stimulators for application in clonal micropropagation of common ash both for large-scale production of planting stock and for conservation of rare and valuable genotypes. 展开更多
关键词 COMMON ASH In Vitro Plant Growth Stimulators ROOTING ACCLIMATIZATION
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Genetically encoded BRET-activated photodynamic therapy for the treatment of deep-seated tumors 被引量:4
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作者 Elena I.Shramova Stepan P.Chumakov +5 位作者 Victoria O.Shipunova Anastasiya V.Ryabova Georgij B.Telegin Andrei V.Kabashin Sergey M.Deyev Galina M.Proshkina 《Light(Science & Applications)》 SCIE EI CAS CSCD 2022年第3期22-34,共13页
Photodynamic therapy(PDT)is one of the most appealing photonic modalities for cancer treatment based on anticancer activity of light-induced photosensitizer-mediated reactive oxygen species(ROS),but a limited depth of... Photodynamic therapy(PDT)is one of the most appealing photonic modalities for cancer treatment based on anticancer activity of light-induced photosensitizer-mediated reactive oxygen species(ROS),but a limited depth of light penetration into tissues does not make possible the treatment of deep-seated neoplasms and thus complicates its widespread clinical adoption.Here,we introduce the concept of genetically encoded bioluminescence resonance energy transfer(BRET)-activated PDT,which combines an internal light source and a photosensitizer(PS)in a single-genetic construct,which can be delivered to tumors seated at virtually unlimited depth and then triggered by the injection of a substrate to initiate their treatment.To illustrate the concept,we engineered genetic NanoLuc-miniSOG BRET pair,combining NanoLuc luciferase flashlight and phototoxic flavoprotein miniSOG,which generates ROS under luciferase-substrate injection.We prove the concept feasibility in mice bearing NanoLuc-miniSOG expressing tumor,followed by its elimination under the luciferase-substrate administration.Then,we demonstrate a targeted delivery of NanoLuc-miniSOG gene,via tumor-specific lentiviral particles,into a tumor,followed by its successful elimination,with tumor-growth inhibition(TGI)coefficient exceeding 67%,which confirms a great therapeutic potential of the proposed concept.In conclusion,this study provides proof-of-concept for deep-tissue“photodynamic”therapy without external light source that can be considered as an alternative for traditional PDT. 展开更多
关键词 NEOPLASMS INJECTION TREATMENT
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