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lipid Metabolism: Critical Roles in Male Fertility and Other Aspects of Reproductive Development in Plants

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Molecular Plant 2020年第7期13卷 955-983页

作者： Xiangyuan Wan Suowei Wu ziwen li Xueli An Youhui Tian Zhongzhi International Institute of Agricultural Biosciences Biology and Agriculture Research CenterUniversity of Science and Technology BeijingBeijing 100024China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing Solidwill Sci-Tech Co.Ltd.Beijing 100192China

Fatty acids and their derivatives are essential building blocks for anther cuticle and pollen wall *** of lipid metabolism during anther and pollen development often leads to genic male sterility(GMS).To date,many lipid metabolism-related GMS genes that are involved in the formation of anther cuticle,pollen wall,and subcellular organelle membranes in anther wall layers have been identified and *** this review,we summarize recent progress on characterizing lipid metabolism-related genes and their roles in male fertility and other aspects of reproductive development in *** the basis of cloned GMS genes controlling biosynthesis and transport of anther cutin,wax,sporopollenin,and tryphine\r\Arabidopsis,rice,and maize as well as other plant species,updated lipid metabolic networks underlying anther cuticle development and pollen wall formation were *** bioinformatics analysis of anther RNA-sequencing datasets from three maize inbred lines(Oh43,W23,and B73),a total of 125 novel lipid metabolism-related genes putatively involved in male fertility in maize were ***,we discuss the pathways regulating lipid metabolism-related GMS genes at the transcriptional and post-transcriptional ***,we highlight recent findings on lipid metabolism-related genes and their roles in other aspects of plant reproductive development.A comprehensive understanding of lipid metabolism,genes involved,and their roles in plant reproductive development will facilitate the application of lipid metabolism-related genes in gene editing,haploid and callus induction,molecular breeding and hybrid seed production in crops.

关键词： lipid metabolism genic male sterility(GMS) anther cuticle pollen wall plant reproductive development

A comparative assessment of gravitational field modeling methods for binary asteroid landing

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Astrodynamics 2024年第3期8卷 417-435页

作者： Tongge Wen Xiangyuan Zeng ziwen li Yang Yu School of Automation Beijing Institute of TechnologyBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

The tradeoff between accuracy and efficiency in gravitational field modeling for binary asteroid landing is one of the challenges in dynamical *** representative gravitational modeling methods are employed and compared in this *** are the sphere-sphere model,ellipsoid-sphere model,inertia integral-polyhedron method,and finite element *** study considers the differences between these four models,particularly their effects on the landing dynamics of a lander.A framework to simulate the coupled orbit-attitude motion of a lander in a binary system is first *** simulations are then performed on the natural landings on the second primary of the(66391)Moshup-Squannit *** results show significant differences in the final landing dispersions,settling time,and sliding distance when applying the simplified *** the basis of the modeling accuracy and computational efficiency,the finite element method should be chosen for future missions.

关键词： landing dynamics contact dynamics gravitational field modeling binary asteroid

Relaxation study of cement based grouting material using nuclear magnetic resonance

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International Journal of Mining Science and Technology 2012年第6期22卷 812-815页

作者： li Xianzhong lin Baiquan Zhai Cheng Ni Guanhua li ziwen State Key Laboratory of Coal Resources and Mine Safety China University of Mining & Technology School of Safety Engineering China University of Mining & Technology

Aiming at actual condition of poor effect of hole sealing for the reason of poor cement paste fluidity in the process of coal mine gas drainage,by adding a water reducing agent,cement paste for hole sealing was *** changes of initial distribution,weighted average values and total relaxation signal intensity of transverse relaxation time(T 2) of water in pure cement paste and water reducing agent added cement paste were studied with low field proton nuclear magnetic resonance(NMR).The results show that there are four peaks in T2 distribution curves of cement paste:the first peak is related to the bound water in flocculation,the second and the third peaks are related to the water in flocculation,water reducing agent makes it extending towards the long relaxation time,increasing its liquidity,and the fourth peak is related to the free *** using weighted average values of T2 and total relaxation signal intensity,hydration process of cement pastes could be roughly divided into four stages:the initial period,reaction period,accelerated period and steady *** analyzing the periods,it makes sure that the grouting process should be completed in the reaction period in the site,and the drainage process should be started in the steady *** results have great guiding significance to the hole sealing and methane drainage.

关键词： Nuclear magnetic resonance(NMR) Transverse relaxation time Water reducing agent Methane drainage

Maize Genic Male-Sterility Genes and Their Applications in Hybrid Breeding: Progress and Perspectives

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Molecular Plant 2019年第3期12卷 321-342页

作者： Xiangyuan Wan Suowei Wu ziwen li Zhenying Dong Xueli An Biao Ma Youhui Tian Jinping li Biology and Agriculture Research Center University of Science and Technology BeijingBeijing 100024China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing Solidwill Sci-Tech Co.Ltd.Beijing 100192China

As one of the most important crops, maize not only has been a source of the food, feed, and industrial feedstock for biofuel and bioproducts, but also became a model plant system for addressing fundamental questions in genetics. Male sterility is a very useful trait for hybrid vigor utilization and hybrid seed production. The identification and characterization of genic male-sterility (GMS) genes in maize and other plants have deepened our understanding of the molecular mechanisms controlling anther and pollen development, and enabled the development and efficient use of many biotechnology-based male-sterility (BMS) systems for crop hybrid breeding. In this review, we summarize main advances on the identification and characterization of GMS genes in maize, and con struct a putative regulatory network controlling maize anther and pollen development by comparative genomic analysis of GMS genes in maize, Arabidopsis, and rice. Furthermore, we discuss and appraise the features of more than a dozen BMS systems for propagating male-sterile lines and producing hybrid seeds in maize and other plants. Finally, we provide our perspectives on the studies of GMS genes and the development of novel BMS systems in maize and other plants. The continuous exploration of GMS genes and BMS systems will enhance our understanding of molecular regulatory networks controlling male fertility and greatly facilitate hybrid vigor utilization in breeding and field production of maize and other crops.

关键词： genic male sterility anther and pollen development biotechnology-based male-sterility system hybrid seed production maize

Pressure-relief and permeability-increase technology of high liquid–solid coupling blast and its application

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International Journal of Mining Science and Technology 2014年第1期24卷 45-49页

作者： Hao Zhiyong Zhou Chao lin Baiquan Pang Yuan li ziwen State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology

As for the coal seam with high stress,high gas and low permeability,a single technology cannot prevent the complex dynamic *** of this,the study proposes a new method of pressure-relief and permeability-increase technology of the high liquid–solid coupling *** coal seam injection and charging structure change,the paper fully works out the dual functions of the water and *** the theoretical calculation,numerical simulation and physical experiments,we obtained that the initial blasting stress,displacement and overpressure of the liquid–solid coupling blast are much better than that of ordinary *** technology has been used in the relative coal mine,and the application results show that the technique has effectively prevented the coal and gas outburst,which has a wide range of application.

关键词： High stress High gasLow permeability coal seamliquid-solid coupling blast

Genome-wide analyses on transcription factors and their potential microRNA regulators involved in maize male fertility

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The Crop Journal 2021年第6期9卷 1248-1262页

作者： ziwen li Taotao Zhu Shuangshuang liu Yilin Jiang Haoyun liu Yuwen Zhang Ke Xie Jinping li Xueli An Xiangyuan Wan Zhongzhi International Institute of Agricultural Biosciences Biology and Agriculture Research CenterUniversity of Science and Technology BeijingBeijing 100024China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing 100192China

Anther development is a programmed biological process crucial to plant male reproduction. Genomewide analyses on the functions of transcriptional factor(TF) genes and their microRNA(miRNA) regulators contributing to anther development have not been comprehensively performed in maize. Here, using published RNA-Seq and small RNA-Seq(sRNA-Seq) data from maize anthers at ten developmental stages in three genic male-sterility(GMS) mutants(ocl4, mac1, and ms23) and wild type W23, as well as newly sequenced maize anther transcriptomes of ms7-6007 and lob30 GMS mutants and their WT lines, we analyzed and found 1079 stage-differentially expressed(stage-DE) TF genes that can be grouped into six(premeiotic, meiotic, postmeiotic, premeiotic-meiotic, premeiotic-postmeiotic, and meiotic-postmeiotic clusters) expression clusters. Functional enrichment combined with cytological and physiological analyses revealed specific functions of genes in each expression cluster. In addition, 118 stage-DE miRNAs and99 miRNA-TF gene pairs were identified in maize anthers. Further analyses revealed the regulatory roles of zma-miR319 and zma-miR159 as well as ZmMs7 and ZmLOB30 on ZmGAMYB expression. Moreover,ZmGAMYB and its paralog ZmGAMYB-2 were demonstrated as novel maize GMS genes by CRISPR/Cas9 knockout analysis. These results extend our understanding on the functions of miRNA-TF gene regulatory pairs and GMS TF genes contributing to male fertility in plants.

关键词： Transcription factor gene microRNA Anther development Male fertility Genic male sterility

ZmMs33 promotes anther elongation via modulating cell elongation regulators,metabolic homeostasis,and cell wall remodeling in maize

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The Crop Journal 2023年第2期11卷 361-373页

作者： ziwen li Taotao Zhu Shuangshuang liu lina Zhao Xueli An Yan Long Xun Wei Juan Zhang Zhenying Dong Xiangyuan Wan Research Center of Biology and Agriculture Shunde Graduate SchoolUniversity of Science and Technology BeijingBeijing 100024China Zhongzhi International Institute of Agricultural Biosciences Beijing 100192China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing Solidwill Sci-Tech Co.Ltd.Beijing 100192China

Plant cell elongation depends on well-defined gene regulations,adequate nutrients,and timely cell wall *** size is positively correlated with the number and viability of pollen grains,while little is known about molecular mechanisms underlying anther cell ***,we found that properly activated cell elongation regulators at transcriptional levels in loss-of-function ZmMs33 mutant(ms33-6038)anthers failed to promote maize anther ***33 deficiency disrupted metabolic homeostasis mainly by inhibiting both photosynthesis in anther endothecium and lipid accumulation in anther ***,ms33-6038 anthers displayed ectopic,premature and excessive secondary cell wall thickening in anther middle layer,which constrained cell elongation structurally and blocked nutrient flows across different anther wall *** metabolic disorder was only found in ms33-6038 mutant rather than several representative male-sterility lines at transcriptional and post-translational ***,the disordered metabolisms and blocked nutrient flows defeated the activated cell elongation regulators,and finally inhibited anther elongation and growth with a unique‘‘idling effect”in ms33-6038 mutant.

关键词： ZmMS33 Anther cell elongation Metabolic homeostasis Secondary cell wall thickening Male sterility Maize

Jasmonic acid-mediated stress responses share the molecular mechanism underlying male sterility induced by deficiency of ZmMs33 in maize

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The Crop Journal 2023年第4期11卷 1115-1127页

作者： ziwen li Shuangshuang liu Taotao Zhu Jing Wang Meng Sun Xueli An Xun Wei Cuimei liu Jinfang Chu Xiangyuan Wan Research Institute of Biology and Agriculture Shunde Innovation SchoolUniversity of Science and Technology BeijingBeijing 100024China Zhongzhi International Institute of Agricultural Biosciences Beijing 100192China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing Solidwill Sci-Tech Co.Ltd.Beijing 100192China National Centre for Plant Gene Research(Beijing) Chinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100039China

Plant male reproduction is a fine-tuned developmental process that is susceptible to stressful environments and influences crop grain *** signaling functions in control of plant normal growth and development as well as in response to external stresses,but the interaction or crosstalk among phytohormone signaling,stress response,and male reproduction in plants remains poorly ***-species comparison among 514 stress-response transcriptomic libraries revealed that ms33-6038,a genic male sterile mutant deficient in the Zm Ms33/Zm GPAT6 gene,displayed an excessive drought stress-like transcriptional reprogramming in anthers triggered mainly by disturbed jasmonic acid(JA)*** increased level of JA appeared in Zm Ms33-deficient anthers at both meiotic and postmeiotic stages and activated genes involved in JA biosynthesis and signaling as well as genes functioning in JA-mediated drought *** accumulation of JA elevated expression level of a gene encoding a WRKY transcription factor that activated the Zm Ms33 *** findings reveal a feedback loop of Zm Ms33-JA-WRKY-Zm Ms33 in controlling male sterility and JA-mediated stress response in maize,shedding light on the crosstalk of stress response and male sterility mediated by phytohormone homeostasis and signaling.

关键词： ZmMs33/ZmGPAT6 Jasmonic acid Phytohormone homeostasis Male sterility Stress response

Optimal Maximum Norm Estimates and Superconvergence for GDM on Two-point Boundary Value Problems

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Communications in Mathematical Research 1999年第1期 89-96页

作者： li Qian and Jiang ziwen (Department of Mathematics, Shandong Normal University, Jinan, 250014)

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｌｙ，Ｌｉａｎｄｏｔｈｅｒａｕｔｈｏｒｓｄｉｄｅｘｔｅｎｓｉｖｅａｎｄｄｅｅｐｒｅｓｅａｒｃｈｏｎｔｈｅｔｈｅｏｒｙａｎｄａｐ－ｐｌｉｃａｔｉｏｎｏｆｇｅｎｅｒａｌｉｚｅｄｄ... 详细信息

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｌｙ，Ｌｉａｎｄｏｔｈｅｒａｕｔｈｏｒｓｄｉｄｅｘｔｅｎｓｉｖｅａｎｄｄｅｅｐｒｅｓｅａｒｃｈｏｎｔｈｅｔｈｅｏｒｙａｎｄａｐ－ｐｌｉｃａｔｉｏｎｏｆｇｅｎｅｒａｌｉｚｅｄｄｉｆｅｒｅｎｃｅｍｅｔｈｏｄｓ（ｓ...

关键词： Two point Boundary Value Problem GDM Maximum Norm Superconvergence Green’s Function