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Enhanced saturation magnetization in La^(3+) doped NiCo ferrites prepared by sol-gel auto-combustion method

Journal of Rare Earths 2024年第8期42卷 1546-1554,I0005页

作者： maddilet. jelli Vidyasagar Thopudurthy Krishna Reddy C.V. Department of Physics Rayalaseema UniversityKurnoolA.P518007.Iindia Department of Physics Government PolytechnicRayachotiA.P516269India

Lanthanum doped nickel-cobalt nano ferrites with chemical formula Ni_(0.5)Co_(0.5)LaxFe_(2-x)O_(4)(x=0.05,0,10,0.15 and 0,20) were prepared using a simple sol-gel auto combustion *** basic structural properties were determined by X-ray diffraction method and the formation of single phased spinel ferrite was *** crystalline size decreased from 25 to 11 nm and lattice parameter a increases with increase of La *** surface morphology of these ferrites was observed by field-emission scanning electron microscopy(FESEM) and agglomerated irregular grains are observed with increase of the rare earth element La ***-dispersive X-ray spectroscopy(EDX) result confirms the presence of the required *** Fourier transform infrared spectroscopy(FTIR) spectrum indicates the formation of the spinel ferrite structure with M-O *** direct band measurements from ultraviolet-visible spectroscopy(UV-Vis) spectroscopy indicate that the direct band gap decreases from 1.39 to 1.19 eV for x=0.05 to x=0.15,then increases to 1.28 eV for x=*** room temperature magnetic properties of these ferrites were studied by a vibrating sample magnetometer(VSM).The enhanced saturation magnetization of 49.73 emu/g is observed for x=0.10 and then saturation magnetizations are gradually decreased for x=0.15 and x=*** the remanent magnetization and coercivity also follow the same trend.

关键词： Ferrites Sol-gel auto combustion La doping Magnetic properties Rare earths

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CopE and TLR6 RNAi-mediated tomato resistance to western flower thrips

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Journal of Integrative Agriculture 2023年第2期22卷 471-480页

作者： jelli VENKATESH Sung Jin KIM Muhammad Irfan SIDDIQUE Ju Hyeon KIM Si Hyeock LEE Byoung-Cheorl KANG Department of Agriculture Forestry and BioresourcesResearch Institute of Agriculture and Life SciencesPlant Genomics Breeding InstituteCollege of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Republic of Korea Department of Agricultural Biotechnology Seoul National UniversitySeoul 08826Republic of Korea Vegetable Research Division National Institute of Horticulture and Herbal ScienceRural Development AdministrationJeonju 55365Republic of Korea Research Institute of Agriculture and Life Sciences Seoul National UniversitySeoul 08826Republic of Korea

The western flower thrips(WFT;Frankliniella occidentalis)is a mesophyll cell feeder that damages many *** of WFT is complex due to factors such as high fecundity,short reproduction time,ability to feed on a broad range of host plants,and broad pesticide *** challenges have driven research into developing alternative pest control approaches for *** study analyzed the feasibility of a biological control-based strategy to manage WFT using RNA interference(RNAi)-mediated silencing of WFT endogenous *** the delivery of RNAi,we developed transgenic tomato lines expressing double-stranded RNA(dsRNA)of coatomer protein subunit epsilon(CopE)and Toll-like receptor 6(TLR6)from *** genes are involved in critical biological processes of WFT,and their dsRNA can be lethal to these insects when ingested *** WFT that fed on the transgenic dsRNAexpressing tomato flower stalk showed increased mortality compared with insects that fed on wild-type *** addition,WFT that fed on TLR6 and CopE transgenic tomato RNAi lines showed reduced levels of endogenous CopE and TLR6 transcripts,suggesting that their mortality was likely due to RNAi-mediated silencing of these ***,our findings demonstrate that transgenic tomato plants expressing dsRNA of TLR6 and CopE can be lethal to ***,suggesting that these genes may be deployed to control insecticide-resistant WFT.

关键词： coatomer protein subunit epsilon(CopE) Frankliniella occidentalis insect resistance RNA interference Toll-like receptor 6(TLR6) tomato transgenics

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Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

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Molecular Plant 2015年第9期8卷 1304-1320页

作者： Mayank Anand Gururani jelli Venkatesh Lam-Son Phan Tran School of Biotechnology Yeungnam University Gyeongsan Gyeongbook 772-749 Korea Department of Bioresource and Food Science Konkuk University Seou1143-701 Korea Signaling Pathway Research Unit RIKEN Center for Sustainable Resource Science 1-7-22 Suehiro-cho Tsurumi Yokohama Kanagawa 230-0045 Japan

Plants as sessile organisms are continuously exposed to abiotic stress conditions that impose numerous detrimental effects and cause tremendous loss of yield. Abiotic stresses, including high sunlight, confer serious damage on the photosynthetic machinery of plants. Photosystem II （PSII） is one of the most susceptible components of the photosynthetic machinery that bears the brunt of abiotic stress. In addition to the generation of reactive oxygen species （ROS） by abiotic stress, ROS can also result from the absorption of excessive sunlight by the light-harvesting complex. ROS can damage the photosynthetic apparatus, particularly PSII, resulting in photoinhibition due to an imbalance in the photosynthetic redox signaling pathways and the inhibition of PSII repair. Designing plants with improved abiotic stress tolerance will require a comprehensive understanding of ROS signaling and the regulatory functions of various components, including protein kinases, transcription factors, and phytohormones, in the responses of photosynthetic machinery to abiotic stress. Bioenergetics approaches, such as chlorophyll a transient kinetics analysis, have facilitated our understanding of plant vitality and the assessment of PSII efficiency under adverse environmental conditions. This review discusses the current understanding and indicates potential areas of further studies on the regulation of the photosynthetic machinery under abiotic stress.

关键词： abiotic stress chlorophyll a fluorescence hormones light-harvesting complex photosynthesis

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辣椒类Pto蛋白激酶(PLPK)基因家族全基因组分析和进化研究

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辣椒杂志 2017年第4期15卷 36-50页

作者： jelli Venkatesh Molly Jahn Byoung-Cheorl Kang 胡震竺(译) 刘越(译) 孔秋生(译) 植物科学与植物基因组育种研究所蔬菜育种研究中心首尔大学韩国首尔151-921 威斯康星大学美国麦迪逊市威斯康星州W153706 华中农业大学园艺林学学院

番茄Pto基因编码包含丝氨酸/苏氨酸激酶(STK)结构域的蛋白,它能抗由丁香假单胞菌番茄致病变种(Pseudomonas syringae ***,Pst)造成的细菌性斑点病。本研究使用PVX系统的体内识别系统测定显示Avr Pto在辣椒基因型中被特异性识别。这种Avr... 详细信息

番茄Pto基因编码包含丝氨酸/苏氨酸激酶(STK)结构域的蛋白,它能抗由丁香假单胞菌番茄致病变种(Pseudomonas syringae ***,Pst)造成的细菌性斑点病。本研究使用PVX系统的体内识别系统测定显示Avr Pto在辣椒基因型中被特异性识别。这种Avr Pto识别导致非寄主超敏反应(HR),以及PVX::Avr Pto融合蛋白在接种辣椒叶组织中的定位,这表明在辣椒中存在与番茄类似的Pto识别机制。然而,辣椒全基因组分析显示没有对应番茄的Pto进化枝,表明在辣椒中有一个Pto识别的替代系统。不过,辣椒基因组中已经鉴定出25个具有高度保守STK结构域的类Pto蛋白激酶(PLPKs)。对于Ptos和PLPK的STK结构域中的大部分氨基酸位点,非同义(d N)与同义(d S)核苷酸替换速率的比值(ω)小于1,表明纯化选择在进化中起主要作用。然而,一些氨基酸位点在Pto同源物的进化过程中被发现为偶发性正选择,因此,不同的进化过程可能在植物中形成了Pto基因家族。基于RNA-seq数据,PLPK基因和其他Pto通路基因,例如Prf,Pti1,Pti5和Pti6在所有检测的辣椒基因型中都表达了。因此,辣椒中对Pst的非寄主超敏反应可能是由于PLPK同系物对Avr Pto效应物的识别,以及Pto信号通路下游组分的后续作用。然而,辣椒中Avr Pto的识别可能涉及其他类受体激酶(RLKs)的活性。本研究中鉴定的PLPKs将作为进一步了解PLPKs在非寄主抗性中作用的基础。

关键词：基因组分析进化过程蛋白激酶 Pto 基因家族辣椒丝氨酸/苏氨酸激酶特异性识别

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