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茄子紫外光受体蛋白基因SmUVR8的克隆及功能分析 被引量:5
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作者 张君豪 何永军 +2 位作者 周露 刘杨 陈火英 《园艺学报》 CAS CSCD 北大核心 2019年第2期295-306,共12页
以光敏感型茄子(Solanum melongena L.)‘蓝山禾线茄’子叶为材料,克隆了紫外光受体蛋白基因UVR8同源基因SmUVR8的cDNA全长序列,并对序列进行生物信息分析,通过转化拟南芥突变体以及实时荧光定量PCR研究其功能。序列分析表明,SmUVR8的CD... 以光敏感型茄子(Solanum melongena L.)‘蓝山禾线茄’子叶为材料,克隆了紫外光受体蛋白基因UVR8同源基因SmUVR8的cDNA全长序列,并对序列进行生物信息分析,通过转化拟南芥突变体以及实时荧光定量PCR研究其功能。序列分析表明,SmUVR8的CDS全长1 530 bp,编码509个氨基酸,属于较不稳定亲水性蛋白。蛋白序列比对发现,SmUVR8与其他茄科植物的UVR8高度同源。通过拟南芥uvr8突变体转化试验发现,转基因植株(SmUVR8/uvr8)恢复了野生型的表型,说明SmUVR8与拟南芥的UVR8功能具有相似性。通过实时定量PCR发现,UV-B照射影响SmUVR8以及下游SmHY5和SmCHS的表达。酵母双杂交结果表明,SmUVR8与SmCOP1的互作依赖于UV-B。推测UV-B在茄子中是通过紫外光受体SmUVR8与SmCOP1的互作,促进SmHY5和SmCHS的表达。 展开更多
关键词 茄子 UV-B SmUVR8 SmCOP1 SmHY5 smchS
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Phase plane bifurcation analysis of water wave dynamics in the simplified modified Camassa-Holm model with friction and wind effects
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作者 Md.Ekramul Islam Md.Abde Mannaf +3 位作者 Mst.Tania Khatun Md.Azizur Rahman M.Ali Akbar Udoy S.Basak 《Journal of Ocean Engineering and Science》 2026年第1期1-12,共12页
The simplified modified Camassa-Holm equation plays a pivotal role in modeling nonlinear wave dynamics across diverse fields,including optical fibers,biological transport,plasma physics,and shallow water flows.Its uni... The simplified modified Camassa-Holm equation plays a pivotal role in modeling nonlinear wave dynamics across diverse fields,including optical fibers,biological transport,plasma physics,and shallow water flows.Its unique mathematical structure captures essential features of wave-breaking phenomena,peakon interactions,and dispersive effects that are crucial for understanding real-world wave behavior.Motivated by the need to predict extreme wave events and design efficient wave energy systems,this study investigates how external forces such as friction and wind influence wave dynamics.We explore rich dynamical transitions through a detailed bifurcation analysis.Our systematic investigation reveals critical thresholds in parameter space where small changes in forcing conditions lead to dramatic transformations in wave behavior.We identify key equilibrium states,nodes,foci,centres,and saddle points,that govern the system’s response,leading to the discovery of novel wave solutions,including kink-like waves,periodic structures,and breather-like solitons.These soliton shapes have potential applications in coastal protection,energy harvesting from waves,and signal modulation in nonlinear optical systems,highlighting their practical significance.These solutions are rigorously validated through numerical simulations and stability analysis,confirming their physical relevance across different parameter regimes.The solutions are derived in exact analytical forms using hyperbolic and trigonometric functions,revealing how parameter variations trigger qualitative shifts in wave patterns.Specifically,we demonstrate how the wind parameter𝛼controls wave amplification while the friction parameter𝛽governs energy dissipation,providing a complete picture of their competing effects on wave evolution.Our findings deepen the theoretical understanding of nonlinear waves while offering practical insights for coastal engineering,climate modeling,signal transmission,and wave energy systems.By explicitly linking solution families to potential engineering applications,this study provides a framework for designing devices that exploit specific soliton structures to achieve targeted wave control and energy efficiency.The methodology developed here can be readily extended to other nonlinear dispersive systems,opening new avenues for investigating wave-structure interactions in various physical contexts. 展开更多
关键词 Bifurcation analysis Phase portrait Hamiltonian equation The smch model Solitary wave
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Abundant closed-form wave solutions to the simplified modified Camassa-Holm equation 被引量:2
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作者 S M Rayhanul Islam S M Yiasir Arafat Hanfeng Wang 《Journal of Ocean Engineering and Science》 SCIE 2023年第3期238-245,共8页
The simplified modified Camassa-Holm (SMCH) equation is an important nonlinear model equation for identifying various wave phenomena in ocean engineering and science. The new auxiliary equation (NAE) method has been a... The simplified modified Camassa-Holm (SMCH) equation is an important nonlinear model equation for identifying various wave phenomena in ocean engineering and science. The new auxiliary equation (NAE) method has been applied to the SMCH equation. Base on the method, we have obtained some novel an- alytical solutions such as hyperbolic, trigonometric, exponential, and rational function solutions of the SMCH equation. For appropriate values of parameters, three dimensional (3D) and two dimensional (2D) graphs are designed by Mathematica. The stability of the model is also discussed in this manuscript. The dynamic and physical behaviors of the solutions derived from the SMCH equation have been ex- tensively discussed by these plots. All our solutions are indispensable for understanding the nonlinear phenomena of dispersive waves that are important in ocean engineering and science. In addition, our results are essential to clarify the various oceanographic applications containing ocean gravity waves, offshore rig in water, energy associated with a moving ocean wave and numerous other related phenom- ena. Finally, the obtained solutions are helpful for studying wave interactions in many new structures and high-dimensional models. 展开更多
关键词 smch equation NAE method Nonlinear physics Kink shape Solitary wave
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