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Mechanical model for double side self-propelled rolling machine based on rigid and flexible contact dynamics

International Journal of Agricultural and Biological Engineering 2022年第6期15卷 38-43页

作者： Yiming li Yu liu Xiang Yue Zhongqiu li Xing'an liu tianlai li College of Engineering Shenyang Agricultural UniversityShenyang 110866China College of Horticulture Shenyang Agricultural UniversityShenyang 110866China Key Laboratory of Protected Horticulture Shenyang Agricultural UniversityMinistry of EducationShenyang 110866China National&Local Joint Engineering Research Center of Northern Horticultural Facilities Design&Application Technology(liaoning) Shenyang 110866China

The objective of the present research was to establish a mechanical model to study the performance of double side self-propelled rolling *** are two key models in the modeling *** first model is the soft cover dynamics model,which is an important innovation in this *** the insulation quilt was established based on the Macro-modeling *** second model is the double side self-propelled rolling machine virtual prototype *** specifying multiple contact constraints and loadings between the soft cover dynamics model and the rigid component,the virtual prototype model was built successfully and the double side self-propelled rolling process was completely ***,the interaction mechanisms of the rigid and flexible coupling mechanics were *** virtual rolling processes of different insulation quilt lengths were analyzed under different thickness *** simulated results showed a good agreement with the experimental measurements,which suggested that the established model is an effective approach to evaluating and optimizing the rolling *** successful establishment of the mechanical model can facilitate the study of the performance of the product and further optimization,and also is of great significance to shorten the development cycle and reduce costs.

关键词： contact dynamics solar greenhouse self-propelled rolling machine mechanical model

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Plasma membrane-localized SlSWEET7a and SlSWEET14 regulate sugar transport and storage in tomato fruits

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Horticulture Research 2021年第1期8卷 2375-2390页

作者： Xinsheng Zhang Chaoyang Feng Manning Wang tianlai li Xin liu Jing Jiang College of Horticulture Shenyang Agricultural University110866 ShenyangLiaoningChina Key Laboratory of Protected Horticulture of Education Ministry 110866 ShenyangLiaoningChina These authors contributed equally:Xinsheng ZhangChaoyang Feng

Sugars,especially glucose and fructose,contribute to the taste and quality of tomato *** compounds are translocated from the leaves to the fruits and then unloaded into the fruits by various sugar transporters at the plasma ***,are sugar transporters that regulate sugar efflux independently of energy or *** date,the role of SWEETs in tomato has received very little *** this study,we performed functional analysis of SlSWEET7a and SlSWEET14 to gain insight into the regulation of sugar transport and storage in tomato ***7a and SlSWEET14 were mainly expressed in peduncles,vascular bundles,and *** SlSWEET7a and SlSWEET14 are plasma membrane-localized proteins that transport fructose,glucose,and *** from the resulting increase in mature fruit sugar content,silencing SlSWEET7a or SlSWEET14 resulted in taller plants and larger fruits(in SlSWEET7a-silenced lines).We also found that invertase activity and gene expression of some SlSWEET members increased,which was consistent with the increased availability of sucrose and hexose in the ***,our results demonstrate that suppressing SlSWEET7a and SlSWEET14 could be a potential strategy for enhancing the sugar content of tomato fruits.

关键词： SWEET1 sugar Sugar

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Temperature variations inside Chinese solar greenhouses with external climatic conditions and enclosure materials

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International Journal of Agricultural and Biological Engineering 2008年第2期1卷 21-26页

作者： Tong Guohong David M Christopher li tianlai Wang Tieliang College of Water Conservancy Shenyang Agricultural UniversityShenyang 110161China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Thermal EngineeringTsinghua UniversityBeijing 100084China College of Horticulture Shenyang Agricultural UniversityShenyang 110161China

Chinese solar greenhouses enable the extension of the crop growing season in the cold climate in Northern China with little or no additional *** temporal variations of the air temperatures inside solar greenhouses located at three cities in North,Northeast and Northwest China were predicted by CFD simulations of the greenhouse systems using typical meteorological *** predicted temperatures based on the meteorological data in Shenyang are quite similar to the measured *** results also show that the external air temperatures and solar radiation fluxes play more important roles for the inside temperatures as indicated by the highest inner temperature in the morning on Feb.18 and from 10:00 to 14:00 on Feb.19 in Beijing and by the predicted temperatures inside the greenhouse being higher in Lanzhou than those in Shenyang and Beijing during most of the *** average daily temperature inside the greenhouse in Lanzhou was nearly 3.5℃higher than that in *** air temperatures for various wall designs show that for single walls,the daily average interior temperatures in the aerated concrete wall greenhouse were higher than those in the brick wall and reinforced concrete wall ***,the air temperature fluctuations were lower in the reinforced concrete wall greenhouse due to greater thermal storage *** results also show that the temperatures in the layered wall greenhouses are quite similar,which coincides with the experimental results。

关键词： solar greenhouse climatic condition wall simulation temperature

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Auxin response and transport during induction of pedicel abscission in tomato

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Horticulture Research 2021年第1期8卷 2814-2822页

作者： Xiufen Dong Chao Ma Tao Xu Michael S.Reid Cai-Zhong Jiang tianlai li Department of Horticulture Shenyang Agricultural UniversityShenyang 110866China Department of Plant Sciences University of CaliforniaDavisCA 95616USA Department of Ornamental Horticulture College of HorticultureChina Agricultural UniversityBeijing 100193China Crops Pathology&Genetic Research Unit USDA-ARSDavisCA 95616USA

Auxin plays a central role in control of organ abscission,and it is thought that changes in the auxin gradient across the abscission zone are the primary determinant of the onset of *** nature of this gradient,whether in concentration,flow,or perhaps in the response system has not conclusively been *** employed a DR5::GUS auxin response reporter system to examine the temporal and spatial distribution of the auxin response activity in response to developmental and environmental cues during pedicel abscission in *** pedicels of young and fully open flowers,auxin response,as indicated by GUS activity,was predominantly detected in the vascular tissues and was almost entirely confined to the abscission zone(AZ)and to the distal portion of the pedicel,with a striking reduction in the proximal tissues below the AZ-a‘step’,rather than a *** pollination and during early fruit development,auxin response increased substantially throughout the *** in GUS activity following treatments that caused pedicel abscission(flower removal,high temperature,darkness,ethylene,or N-1-naphthylphthalamic acid(NPA)treatment)were relatively minor,with reduced auxin response in the AZ and some reduction above and below *** of genes encoding some auxin efflux carriers(PIN)and influx carriers(AUX⁄LAX)was substantially reduced in the abscission zone of NPA-treated pedicels,and in pedicels stimulated to abscise by flower *** results suggest that changes in auxin flow distribution through the abscission zone are likely more important than the auxin response system in the regulation of abscission.

关键词： distribution transport flowers

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PROTECTIVE ROLES OF D1 PROTEIN TURNOVER AND THE XANTHOPHYLL CYCLE IN TOMATO(SOLANUM LYCOPERSICUM)UNDER SUB-HIGH TEMPERATURE AND HIGH liGHT STRESS

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Frontiers of Agricultural Science and Engineering 2021年第2期8卷 262-279页

作者： Tao LUA Jiazhi LU Mingfang QI Zhouping SUN Yufeng liU tianlai li Horticulture Department Key Laboratory of Protected Horticulture of Ministry of EducationShenyang Agricultural UniversityShenyang 110866China National&Local Joint Engineering Research Center of Northern Horticultural Facilities Design&Application Technology(liaoning) Shenyang 110866China Key Laboratory of Horticultural Crops Genetic Improvement(Ministry of Agriculture and Rural Affairs of China) Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China.

D1 protein turnover and the xanthophyll cycle(XC)are important photo-protective mechanisms in plants that operate under adverse ***,streptomycin sulfate(SM)and dithiothreitol(DTT)were used in tomato plants as inhibitors of D1 protein turnover and XC to elucidate their photoprotec-tive impacts under sub-high temperature and high light conditions(HH,35°C,1000 limol m 2.S1).SM and DTT treatments significantly reduced the net photosynthetic rate,apparent quantum efficiency,maximum photochemical efficiency,and potential activity of photosystem II,leading to photoinhibition and a decline in plant biomass under *** increase in reactive oxygen species levels resulted in thylakoid membrane lipid *** addition,there were increased non-photochemical quenching and decreased chlorophyll pigments in SM and DTT application,causing an inhibition of D1 protein production at both transcriptional and translational ***,inhibition of D1 turnover caused greater photoinhibition than XC ***,the recovery levels of most photosynthesis indicators in DTT-treated plants were higher than in SM-treated *** findings support the view that D1 turnover has a more important role than XC in photoprotection in tomato under HH conditions.

关键词： D1 turnover photoinhibition photoprotection photosynthesis tomato xanthophyll cycle

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短期昼间亚高温胁迫对番茄光合作用的影响

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农业工程学报 2009年第9期25卷 220-225页

作者：李天来李淼沈阳农业大学园艺学院辽宁省设施园艺重点实验室沈阳110161

为了探讨日光温室春末夏初亚高温环境对番茄光合作用的影响,采用人工气候室模拟环境,在番茄第1花序第1花开花当天,以25℃为对照,研究35℃昼间亚高温处理对番茄光合作用日变化的影响。结果表明:在适宜光照度条件下,3d以下35℃昼间亚高温... 详细信息

为了探讨日光温室春末夏初亚高温环境对番茄光合作用的影响,采用人工气候室模拟环境,在番茄第1花序第1花开花当天,以25℃为对照,研究35℃昼间亚高温处理对番茄光合作用日变化的影响。结果表明:在适宜光照度条件下,3d以下35℃昼间亚高温处理可提高番茄净光合速率,而6d以上昼间亚高温处理可明显降低番茄的净光合速率;同时适宜温度(对照,25℃)处理的番茄净光合速率日变化未出现"光合午休"现象;而35℃昼间亚高温处理的番茄净光合速率日变化出现轻度"光合午休"现象;昼间亚高温处理可提高番茄叶片气孔导度、降低气孔限制值、增加开放气孔的比率、提高胞间CO2浓度和蒸腾速率。这些结果说明,在适宜光照条件下,番茄遭受昼间亚高温胁迫的初期可通过调节自身一些相关反应来适应环境,避免光合速率的降低,而当胁迫时间达到6d以上时则会对光合作用产生不良影响,同时番茄"光合午休"现象不仅与光照度有关,而且与温度有关;昼间亚高温对番茄光合速率的影响与气孔无关,是由非气孔因素限制的。

关键词：光合作用温室农产品昼间亚高温番茄日变化

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Different Proteomics of Ca^(2+) on SA-induced Resistance to Botrytis cinerea in Tomato

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Horticultural Plant Journal 2016年第3期2卷 154-162页

作者： li linlin GUO Peng JIN Hua li tianlai College of Environment and Resource Dalian Nationaltities University College of Horticuture Shenyang Agriculture University

This study aims to comprehensively study the effects of Ca^(2+) on the SA-induced resistance Botrytis cinerea in tomato through proteomics analysis.A proteomic approach was used to uncover the inducible proteins of tomato in the susceptible tomato cultivars ‘L402' against Botrytis cinerea after salicylic acid(SA) and a combination treatment of CaCl_2 and *** results showed that the use of combination treatment of CaCl_2 and SA significantly enhanced tomato resistance against Botrytis *** total,46 differentially expressed protein spots from 2-DE gel maps were detected,of which 41 were identified by mass *** the identified proteins were categorized into eight groups according to their putative functions:defense response(14.00%),antioxidative protein(9.75%),photosynthesis(24.39%),molecular chaperone(4.88%),energy(17.01%),metabolism(21.95%),protein synthesis(4.88%) and signal transduction(0.2%).Of the proteins in the eight function groups,the effect of stress/defense and reactive oxygen species on Ca^(2+) -regulated SA-induced resistance may be the most important one in induced resistance by *** expression level of pathogenesis-related proteins(PRs) and chitinase was upregulated by a combination treatment of CaCl_2 and *** characterization of these proteins greatly helped to reveal the induced proteins involved in the regulation of Ca^(2+) on SA-induced resistance to Botrytis *** the combination treatment of CaCl_2 and SA,the defense response and antioxidative protein were clearly upregulated much more than SA alone or the control treatment by the method of proteomics and *** present findings suggest that susceptible tomato cultivars treated by the combination treatment of CaCl_2 and SA might possess a more sensitive SA signaling system or effective pathway than SA treatment *** addition,results indicated that SA could coordinate other cellular activities linked with photosynthesis and metabolism to facilitate defense

关键词： tomato calcium salicylic acid Botrytis cinerea proteomic induced resistance

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SlBEL11 regulates flavonoid biosynthesis,thus fine-tuning auxin efflux to prevent premature fruit drop in tomato

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Journal of Integrative Plant Biology 2024年第4期66卷 749-770页

作者： Xiufen Dong Xianfeng liu lina Cheng Ruizhen li Siqi Ge Sai Wang Yue Cai Yang liu Sida Meng Cai-Zhong Jiang Chun-lin Shi tianlai li Daqi Fu Mingfang Qi Tao Xu College of Horticulture Shenyang Agricultural UniversityShenyang 110866China Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province College of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory for Quality and Safety Control of Subtropical Fruits and Vegetables Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang ProvinceMinistry of Agriculture and Rural AffairsCollege of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory of Protected Horticulture of Ministry of Education Shenyang 110866China Crops Pathology and Genetic Research Unit United States Department of Agriculture Agricultural Research ServiceWashingtonDC 20250USA Department of Plant Sciences University of CaliforniaDavisCA 95616USA ANGENOVO Oslo 0753Norway Laboratory of Fruit Biology College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Auxin regulates flower and fruit abscission,but how developmental signals mediate auxin transport in abscission remains ***,we reveal the role of the transcription factor BEL1-liKE HOMEODOMAIN11(SlBEL11)in regulating auxin transport during abscission in tomato(Solanum lycopersicum).SlBEL11 is highly expressed in the fruit abscission zone,and its expression increases during fruit *** of SlBEL11 expression by RNA interference(RNAi)caused premature fruit drop at the breaker(Br)and 3d post-breaker(Br+3)stages of fruit *** and metabolome analysis of SlBEL11-RNAi lines revealed impaired flavonoid biosynthesis and decreased levels of most flavonoids,especially quercetin,which functions as an auxin transport *** suggested that SlBEL11 prevents premature fruit abscission by modulating auxin efflux from fruits,which is crucial for the formation of an auxin response ***,quercetin treatment suppressed premature fruit drop in SlBEL11-RNAi *** affinity purification sequencing(DAP-seq)analysis indicated that SlBEL11 induced expression of the transcription factor gene SlMYB111 by directly binding to its *** immunoprecipitation-quantitative polymerase chain reaction and electrophoretic mobility shift assay showed that *** MYELOBLASTOSIS VIRAL ONCOGENE HOMOLOG111(SlMYB111)induces the expression of the core flavonoid biosynthesis genes SlCHS1,SlCHI,SlF3H,and SlFLS by directly binding to their *** findings suggest that the SlBEL11-SlMYB111 module modulates flavonoid biosynthesis to fine-tune auxin efflux from fruits and thus maintain an auxin response gradient in the pedicel,thereby preventing premature fruit drop.

关键词： abscission auxin flavonoid SlBEL11 tomato

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短时间亚高温处理及其恢复对番茄光合特性的影响

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农业工程学报 2007年第1期23卷 162-167页

作者：张洁李天来河海大学现代农业工程系南京210098 沈阳农业大学园艺学院辽宁省设施园艺重点实验室沈阳110161

以“辽园多丽”番茄(L y cop *** lentum M ill.)为试材,在植株第1花序第1花开花时,对其进行2 h+15 m in(光合测定平均时间,下同)、4 h+15 m in、6 h+15 m in、8 h+15 m in的35℃昼间亚高温处理,之后转入25℃条件下分别恢复6 h、4 h、2... 详细信息

以“辽园多丽”番茄(L y cop *** lentum M ill.)为试材,在植株第1花序第1花开花时,对其进行2 h+15 m in(光合测定平均时间,下同)、4 h+15 m in、6 h+15 m in、8 h+15 m in的35℃昼间亚高温处理,之后转入25℃条件下分别恢复6 h、4 h、2 h,以25℃处理为对照,研究较短时间亚高温处理及常温恢复对番茄光合作用及叶绿素荧光作用的影响。结果表明:35℃昼间亚高温处理2 h,番茄叶片光合作用即明显降低;而亚高温处理2 h、4 h和6 h的植株在25℃恢复的最初2 h内光合作用持续下降。经35℃亚高温处理2 h,番茄叶片各项叶绿素荧光参数均降低,但亚高温处理6 h内的植株在常温恢复2 h后各项指标即可恢复正常。综合认为,番茄植株经过2 h的35℃昼间亚高温处理,当天的光合作用就难以恢复到对照水平,在持续亚高温条件下,净光合速率的降低主要由非气孔限制因素引起的;而气孔限制因素则是亚高温处理后处于常温恢复初期的植株光合作用下降的一个重要原因。

关键词：番茄亚高温光合作用荧光诱导动力学参数

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论我国日光温室生产发展的制约因素与战略性调整

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农业工程学报 2003年第Z1期19卷 75-78页

作者：李天来沈阳农业大学园艺学院辽宁省设施园艺重点实验室沈阳110161

文章论述了我国日光温室生产的历史性贡献和目前影响日光温室发展的因素,提出了今后日光温室生产的战略性调整方向,为我国日光温室生产的健康发展提供了重要参考.

关键词：日光温室制约因素战略性调整

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