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Genome-Wide GRAS Gene Family Analysis Reveals the Classification,Expression Profiles in Melon(Cucumis melo L.) 被引量:1
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作者 Yanfei Bi Bin Wei +4 位作者 Ying Meng zhongzhao li Zhenghui Tang Feng Yin Chuntao Qian 《Phyton-International Journal of Experimental Botany》 SCIE 2021年第4期1161-1175,共15页
Melon(Cucumis melo),belonging to the Cucurbitaceae family,is a globally important economic crop.GRAS(GAI,RGA,SCR)genes,which are a type of transcription factor,play a critical role in plant growth and development,incl... Melon(Cucumis melo),belonging to the Cucurbitaceae family,is a globally important economic crop.GRAS(GAI,RGA,SCR)genes,which are a type of transcription factor,play a critical role in plant growth and development,including processes such as radial root patterning,light signalling,abiotic/biotic stress,axillary shoot meristem formation,and phytohormone(gibberellin)signal transduction.In this study,the GRAS family in melon was analysed comprehensively with respect to chromosomal location,motif prediction,gene structure,and expression pattern.A total of 37 GRAS genes were first identified in melon,after which a phylogenetic tree was built with the GRAS genes of three model species(Arabidopsis,rice,and sacred lotus)and were divided into nine groups based on the findings of previous studies.Motif and gene structure analysis showed typical conserved domains in all melon GRAS and similar structures in the same subfamilies.The expression analysis of GRAS genes done using RNA-seq data,showed that these genes were differentially expressed in different melon leaves under powdery mildew stress.Furthermore,the real-time quantitative PCR for GRAS genes revealed gene expression corresponding to powdery mildew stress.Our results provide useful information for a better understanding of GRAS genes and provide the foundation for additional functional exploration of the melon GRAS gene family in the powdery mildew stress response. 展开更多
关键词 Genome-wide identification GRAS MELON stress response
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Active fuel design A way to manage the right fuel for HCCI engines 被引量:2
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作者 Zhen HUANG zhongzhao li +3 位作者 Jianyong ZHANG Xingcai LU Junhua FANG Dong HAN 《Frontiers in Energy》 SCIE CSCD 2016年第1期14-28,共15页
Homogenous charge compression ignition (HCCI) engines feature high thermal efficiency and ultralow emissions compared to gasoline engines. However, unlike SI engines, HCCI combustion does not have a direct way to tr... Homogenous charge compression ignition (HCCI) engines feature high thermal efficiency and ultralow emissions compared to gasoline engines. However, unlike SI engines, HCCI combustion does not have a direct way to trigger the in-cylinder combustion. Therefore, gasoline HCCI combustion is facing challenges in the control of ignition and, combustion, and operational range extension. In this paper, an active fuel design concept was proposed to explore a potential pathway to optimize the HCCI engine combustion and broaden its operational range. The active fuel design concept was realized by real time control of dual-fuel (gasoline and n-heptane) port injection, with exhaust gas recirculation (EGR) rate and intake temperature adjusted. It was found that the cylinder- to-cylinder variation in HCCI combustion could be effectively reduced by the optimization in fuel injection proportion, and that the rapid transition process from SI to HCCI could be realized. The active fuel design technology could significantly increase the adaptability of HCCI combustion to increased EGR rate and reduced intake temperature. Active fuel design was shown to broaden the operational HCCI load to 9.3 bar indicated mean effective pressure (IMEP). HCCI operation was used by up to 70% of the SI mode load while reducing fuel consumption and nitrogen oxides emissions. Therefore, the active fuel design technology could manage the right fuel for clean engine combustion, and provide a potential pathway for engine fuel diversification and future engine concept. 展开更多
关键词 active fuel design HCCI gasoline N-HEPTANE engine combustion
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Effects of fuel combination and IVO timing on combustion and emissions of a dual-fuel HCCI combustion engine 被引量:1
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作者 Xin liANG Jianyong ZHANG +3 位作者 zhongzhao li Jiabo ZHANG Zhen HUANG Dong HAN 《Frontiers in Energy》 SCIE CSCD 2020年第4期778-789,共12页
This paper experimentally and numerically studied the effects of fuel combination and intake valve opening(IVO)timing on combustion and emissions of an n-heptane and gasoline dual-flicl homogeneous charge compression ... This paper experimentally and numerically studied the effects of fuel combination and intake valve opening(IVO)timing on combustion and emissions of an n-heptane and gasoline dual-flicl homogeneous charge compression ignition(HCCI)engine.By changing the gasoline fraction(GF)from 0」to 0.5 and the IVO timing from-15°CA ATDC to 35°CA ATDC,the in-cylinder pressure traces,heat release behaviors,and HC and CO emissions were investigated.The results showed that both the increased GF and the retarded IVO timing delay the combustion phasing,lengthen the combustion duration,and decrease the peak heat release rate and the maximum average combustion temperature,whereas the IVO timing has a more obvious influence on combustion than GF.HC and CO emissions are decreased with reduced GF,advanced IVO timing and increased operational load. 展开更多
关键词 homogeneous charge compression ignition dual-fuel N-HEPTANE GASOLINE intake valve opening timing
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