While SlPti5 has been shown to play a crucial role in the regulation of antagonistic genes in Solanum lycopersicum and Arabidopsis against pathogen infection,there have been no comprehensive studies on the effects of ...While SlPti5 has been shown to play a crucial role in the regulation of antagonistic genes in Solanum lycopersicum and Arabidopsis against pathogen infection,there have been no comprehensive studies on the effects of SlPti5 on the regulatory response mechanism of reactive oxygen species(ROS) system and hormone pathways during growth and disease resistance of tomato plants.Here,we investigated the function of SlPti5 in the defense response of tomato against Botrytis cinerea utilizing a virus-induced gene silencing(VIGS)-based system.Expression profile analysis showed that SlPti5 was significantly induced upon B.cinerea infection,with high expression levels in the leaves and fruit of tomato.VIGS-based silencing of SlPti5 inhibited early vegetative growth,increased the plant’s susceptibility to infection,promoted the development of ROS,affected the expression of genes involved in the ROS scavenging system,and attenuated the expression of genes associated with pathogenesis and the ethylene/jasmonic acid signaling pathways.In sum,our data demonstrated that SlPti5 stimulates the immune response of tomato plant to Botrytis cinerea infection by involving the ethylene(ET)-and jasmonic acid(JA)-mediated pathways and modulating the expression of some key pathogenesis-related(PR) genes.展开更多
The triazine-based carbon nitride known as polytriazine imide(PTI)is a metal-free semiconductor photocatalyst but usually shows moderate activity due to its limited charge transfer mobility.Here,carbon self-doped PTI(...The triazine-based carbon nitride known as polytriazine imide(PTI)is a metal-free semiconductor photocatalyst but usually shows moderate activity due to its limited charge transfer mobility.Here,carbon self-doped PTI(C-PTI)was prepared via a facile and green method by using glucose as the carbon source.In the condensation process,glucose can promote nanotube formation,giving the product larger surface areas.Moreover,carbon self-doping induces an intrinsic change in the electronic structure,thus optimizing the band structure and the electronic transport property.Therefore,the as-synthesized C-PTI exhibits remarkably enhanced photocatalytic activities for both hydrogen evolution and tetracycline degradation reactions.展开更多
Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the two R genes...Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the two R genes. In the present report, two hypersensitive response (HR) initiation systems were employed to study the time_course expression induced by Avr / Cf interaction of the genes encoding Pti4, Pti5 and Pti6 which interact directly with Pto: (1) Seeds of tomato (Lycopersicon esculentum Mill.) containing complementary gene pairs Avr 4/ Cf _4 and Avr 9/ Cf _9 were obtained through crossing. Their seedlings developed HR under room temperature. (2) Avr / Cf seedlings grew normally at 33 ℃. When the temperature was shifted down to 25 ℃, HR occurred within hours in the seedlings. Results of both experiments showed that expression of Pti4, Pti5 and Pti6 was induced upon development of hypersensitive necrosis in Avr / Cf seedlings. However, the expression levels and patterns of these Pti s differed. This finding indicated that these Pti s function complementarily, and might be involved in regulation of both Pto and Cf _conferred resistance.展开更多
基金supported by the National Key Technology R&D Program of China (2016YFD0401201)the National Natural Science Foundation of China (31801602 and 31571897)+1 种基金the Project of Tianjin Education Commission Scientific Research Plan, China (2018KJ094)the National Science and Technology Major Project of China (2018ZX10101003-002-004)。
摘要While SlPti5 has been shown to play a crucial role in the regulation of antagonistic genes in Solanum lycopersicum and Arabidopsis against pathogen infection,there have been no comprehensive studies on the effects of SlPti5 on the regulatory response mechanism of reactive oxygen species(ROS) system and hormone pathways during growth and disease resistance of tomato plants.Here,we investigated the function of SlPti5 in the defense response of tomato against Botrytis cinerea utilizing a virus-induced gene silencing(VIGS)-based system.Expression profile analysis showed that SlPti5 was significantly induced upon B.cinerea infection,with high expression levels in the leaves and fruit of tomato.VIGS-based silencing of SlPti5 inhibited early vegetative growth,increased the plant’s susceptibility to infection,promoted the development of ROS,affected the expression of genes involved in the ROS scavenging system,and attenuated the expression of genes associated with pathogenesis and the ethylene/jasmonic acid signaling pathways.In sum,our data demonstrated that SlPti5 stimulates the immune response of tomato plant to Botrytis cinerea infection by involving the ethylene(ET)-and jasmonic acid(JA)-mediated pathways and modulating the expression of some key pathogenesis-related(PR) genes.
基金Project supported by the National Natural Science Foundation of China(No.51702134)the Natural Science Foundation of Jiangsu Province(No.BK20170310)+1 种基金the PhD Research Startup Foundation of Jiangsu University of Technology(No.KYY18038)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.XSJCX2001),China。
摘要The triazine-based carbon nitride known as polytriazine imide(PTI)is a metal-free semiconductor photocatalyst but usually shows moderate activity due to its limited charge transfer mobility.Here,carbon self-doped PTI(C-PTI)was prepared via a facile and green method by using glucose as the carbon source.In the condensation process,glucose can promote nanotube formation,giving the product larger surface areas.Moreover,carbon self-doping induces an intrinsic change in the electronic structure,thus optimizing the band structure and the electronic transport property.Therefore,the as-synthesized C-PTI exhibits remarkably enhanced photocatalytic activities for both hydrogen evolution and tetracycline degradation reactions.
摘要Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the two R genes. In the present report, two hypersensitive response (HR) initiation systems were employed to study the time_course expression induced by Avr / Cf interaction of the genes encoding Pti4, Pti5 and Pti6 which interact directly with Pto: (1) Seeds of tomato (Lycopersicon esculentum Mill.) containing complementary gene pairs Avr 4/ Cf _4 and Avr 9/ Cf _9 were obtained through crossing. Their seedlings developed HR under room temperature. (2) Avr / Cf seedlings grew normally at 33 ℃. When the temperature was shifted down to 25 ℃, HR occurred within hours in the seedlings. Results of both experiments showed that expression of Pti4, Pti5 and Pti6 was induced upon development of hypersensitive necrosis in Avr / Cf seedlings. However, the expression levels and patterns of these Pti s differed. This finding indicated that these Pti s function complementarily, and might be involved in regulation of both Pto and Cf _conferred resistance.