Cytoplasmic male sterility(CMS)is an important tool for producing F1 hybrids,which can exhibit heterosis.The companion system,restorer-of-fertility(Rf),is poorly understood at the molecular level and would be valuable...Cytoplasmic male sterility(CMS)is an important tool for producing F1 hybrids,which can exhibit heterosis.The companion system,restorer-of-fertility(Rf),is poorly understood at the molecular level and would be valuable in producing restorer lines for hybrid seed production.The identity of the Rf gene in Capsicum(pepper)is currently unclear.In this study,using bulked segregant RNA sequencing(BSR-seq),a strong candidate Rf gene,Capana06g002866,which is annotated as a NEDD8 conjugating enzyme E2,was identified.Capana06g002866 has an ORF of 555 bp in length encoding 184 amino acids;it can be cloned from F1 plants from the hybridization of the CMS line 8A and restorer line R1 but is not found in CMS line 8A.With qRT-PCR validation,Capana06g002866 was found to be upregulated in restorer accessions compared to sterile accessions.The relative expression in flower buds increased with the developmental stage in F1 plants,while the expression was very low in all flower bud stages of the CMS lines.These results provide new insights into the Rf gene in pepper and will be useful for other crops utilizing the CMS system.展开更多
Guided bone regeneration(G BR)membrane has been used to improve functional outcomes for periodontal regener ation.However,few studies have focused on the biomimetic membrane mim-icking the vascularization of the perio...Guided bone regeneration(G BR)membrane has been used to improve functional outcomes for periodontal regener ation.However,few studies have focused on the biomimetic membrane mim-icking the vascularization of the periodontal membrane.This study aimed to fabricate waterborne polyurethane(WPU)fibrous membranes loaJed fibroblast growth factor-2(FGF-2)via emulsion electrospinning,which can promote regeneration of periodontal tissue via the vascularization of the biomimetic GBR membrane.A biodegradable WPU was synthesized by using lysine and dime-thylpropionic acid as chain extenders according to the rule of green chemical synthesis technology.The WPU fibers with FGF-2 was fabricated via emulsion electrospinning.The results confirmed that controlled properties of the fibrous membrane had been achieved with controlled degradation,suitable mech anical properties and sustained release of the factor.The immunohistochemical expression of angiogenic-related factors was positive,meaning that FGF-2 loaded in fibers can sig-nificantly promote cell vasculariz ation.The fiber scaffold loaded FGF-2 has the potential to be used as a functional GBR membrane to promote the formation of extraosseous blood vessels during periodontal repairing.展开更多
基金funded by the Scientific Research Start-up Funds for Openly recruited Doctors of Science and Technology Innovation Funds of Gansu Agricultural University,China(GAU-KYQD-2018-17)the National Natural Sciences Foundation of China(31560555,31760572).
文摘Cytoplasmic male sterility(CMS)is an important tool for producing F1 hybrids,which can exhibit heterosis.The companion system,restorer-of-fertility(Rf),is poorly understood at the molecular level and would be valuable in producing restorer lines for hybrid seed production.The identity of the Rf gene in Capsicum(pepper)is currently unclear.In this study,using bulked segregant RNA sequencing(BSR-seq),a strong candidate Rf gene,Capana06g002866,which is annotated as a NEDD8 conjugating enzyme E2,was identified.Capana06g002866 has an ORF of 555 bp in length encoding 184 amino acids;it can be cloned from F1 plants from the hybridization of the CMS line 8A and restorer line R1 but is not found in CMS line 8A.With qRT-PCR validation,Capana06g002866 was found to be upregulated in restorer accessions compared to sterile accessions.The relative expression in flower buds increased with the developmental stage in F1 plants,while the expression was very low in all flower bud stages of the CMS lines.These results provide new insights into the Rf gene in pepper and will be useful for other crops utilizing the CMS system.
基金This work was supported by the Doctoral Research Initiation Fund of Affiliated Hospital of Southwest Medical University,University Sponsored Research Program of Southwest Medical University(2019ZQN097)the National Natural Science Foundation(81802246).
文摘Guided bone regeneration(G BR)membrane has been used to improve functional outcomes for periodontal regener ation.However,few studies have focused on the biomimetic membrane mim-icking the vascularization of the periodontal membrane.This study aimed to fabricate waterborne polyurethane(WPU)fibrous membranes loaJed fibroblast growth factor-2(FGF-2)via emulsion electrospinning,which can promote regeneration of periodontal tissue via the vascularization of the biomimetic GBR membrane.A biodegradable WPU was synthesized by using lysine and dime-thylpropionic acid as chain extenders according to the rule of green chemical synthesis technology.The WPU fibers with FGF-2 was fabricated via emulsion electrospinning.The results confirmed that controlled properties of the fibrous membrane had been achieved with controlled degradation,suitable mech anical properties and sustained release of the factor.The immunohistochemical expression of angiogenic-related factors was positive,meaning that FGF-2 loaded in fibers can sig-nificantly promote cell vasculariz ation.The fiber scaffold loaded FGF-2 has the potential to be used as a functional GBR membrane to promote the formation of extraosseous blood vessels during periodontal repairing.
