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Woody plant cell walls:Fundamentals and utilization

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Molecular Plant 2024年第1期17卷 112-140页

作者： Wei li Ying-Chung Jimmy lin Ying-Lan Chen Chenguang Zhou Shuang li Nette De Ridder Dyoni M.Oliveira Lanjun Zhange Baocai Zhang Jack P.Wang Changzheng Xu Xiaokang Fu Keming Luo Ai-Min Wu Taku Demura Meng-Zhu Lu Yihua Zhou laigeng li Toshiaki Umezawa Wout Boerjan Vincent L.Chiang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040China Department of life Science National Taiwan UniversityTaipeiTaiwanChina Department of Biotechnology and Bioindustry Sciences College of Bioscience and BiotechnologyNational Cheng Kung UniversityTainanTaiwanChina Department of Plant Biotechnology and Bioinformatics Ghent UniversityTechnologiepark 719052 GhentBelgium VIB Center for Plant Systems Biology Technologiepark 719052 GhentBelgium State Key Laboratory of Plant Genomics Insttute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Forest Biotechnology Group Department of Forestry and Environmental ResourcesNorth Carolina State UniversityRaleighNC 27695USA Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation Integrative Science Center of Germplasm CreationSchool of Life SciencesSouthwest UniversityChongqing 400715China Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm College of Forestry and Landscape ArchitecturesSouth China Agricultural UniversityGuangzhou510642China Center for Digital Green-innovation Nara Institute of Science and TechnologykomaNara 630-0192Japan State Key Laboratory of Subtropical Siviculture College of Forestry and BiotechnologyZhejang A&F UniversityHangzhou 311300China CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences300 Fenglin RoadShanghai 200032China Laboratoryof MetabolicScienceofForest Plants and Microorganisms Rsearch Institute for Sustainable HumanosphereKyoto UniversityUjiKyoto 611-0011 Japan

Cell walls in plants,particularly forest trees,are the major carbon sink of the terrestrial *** and biosynthetic features of plant cell walls were revealed early on,focusing mostly on herbaceous model *** developments in genomics,transcriptomics,epigenomics,transgenesis,and associated analytical techniques are enabling novel insights into formation of woody cell ***,we review multilevel regulation of cell wall biosynthesis in forest tree *** highlight current approaches to engineering cell walls as potential feedstock for materials and energy and survey reported field tests of such engineered transgenic *** outline opportunities and challenges in future research to better understand cell type biogenesis for more efficient wood cell wall modification and utilization for biomaterials or for enhanced carbon capture and storage.

关键词： regulation of cell wall formation biosynthesis of cell wall components lignin cellulose hemicellulose cell wall utilization

Rapid Characterization of Woody Biomass Digestibility and Chemical Composition Using Near-infrared Spectroscopy

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Journal of Integrative Plant Biology 2011年第2期53卷 166-175页

作者： Shen Hou laigeng li Key Laboratory of Synthetic Biology Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences the ChineseAcademy of Sciences Shanghai 200032 China

Rapid determination of the properties of lignocellulosic material is highly desirable for biomass produc- tion and utilization. In the present study, measurements of woody biomass digestibility and chemical composition using near-infrared reflectance （NIR） spectroscopy were calibrated. Poplar and eucalyptus materials were recorded in NIR spectrum as well as determined for their chemical compositions of Klason lignin, a-cellulose, holocellulose, lignin syringyl/guaiacyl （S/G） ratio and enzymatic digestibility. Fitting of the NIR information with chemical properties and digestibility by partial least-squares （PLS） regression generated a group of trained NIR models that were able to be used for rapid biomass measurement. Applying the models for woody biomass measurements led to a reliable evaluation of the chemical composition and digestibility, suggesting the feasibility of using NIR spectroscopy in the rapid characterization of biomass properties.

关键词： BIOMASS energy liGNOCELLULOSE NEAR infrared spectroscopy BIODEGRADATION LEAST squares REGRESSION analysis MATHEMATICAL models

PtrCel9A6, an Endo-l,4-β-Glucanase, Is Required for Cell Wall Formation during Xylem Differentiation in Populus

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Molecular Plant 2013年第6期6卷 1904-1917页

作者： liangliang Yu Jiayan Sun laigeng li National Key Laboratory of Plant Molecular Genetics/CAS Key Laboratory of Synthetic Biology Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Road Shanghai 200032 China

ABSTRACT Endo-l,4-β-glucanases （EGases） are involved in many aspects of plant growth. Our previous study found that an EGase, PtrCel9A6, is specifically expressed in differentiating xylem cells during Populus secondary growth. In this study, the xylem-specific PtrCel9A6 was characterized for its role in xylem differentiation. The EGase is localized on the plasma membrane with catalytic domain toward the outside cell wall, hydrolyzing amorphous cellulose. Suppression of PtrCel9A6 expression caused secondary cell wall defects in xylem cells and significant cellulose reduction in Populus. Heterologous expression of PtrCelgA6 in Arabidopsis enhanced plant growth as well as increased fiber cell length. In addition, introduction of PtrCel9A6 into Arabidopsis resulted in male sterility due to defects in anther dehiscence. Together, these results demonstrate that PtrCel9A6 plays a critical role in remodeling the 1,4-β-glucan chains in the wall matrix and is required for cell wall thickening during Populus xylem differentiation.

关键词： endo-l,4-β-glucanase cell wall cellulose synthesis cell wall thickening Populus.

PtrHB7, a class III HD-Zip Gene, Plays a Critical Role in Regulation of Vascular Cambium Differentiation in Populus

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Molecular Plant 2013年第4期6卷 1331-1343页

作者： Yingying Zhu Dongliang Song Jiayan Sun Xingfen Wang laigeng li National Key Laboratory of Plant Molecular Genetics and Key Laboratory of Synthetic Biology Institute of Plant Physiology and Ecology ShanghaiInstitutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Rd Shanghai 200032 China

A key question in the secondary growth of trees is how differentiation of the vascular cambium cells is directed to concurrently form two different tissues： xylem or phloem, class III homeodomain-leucine zipper （HD-Zip III） genes are known to play critical roles in the initiation, patterning, and differentiation of the vascular system in the process of primary and secondary growth. However, the mechanism of how these genes control secondary vascular dif- ferentiation is unknown. Here, we show that a Populus class III HD-Zip gene, PtrHB7, was preferentially expressed in cambial zone. PtrHB7-suppressed plants displayed significant changes in vascular tissues with a reduction in xylem but increase in phloem. Transcriptional analysis revealed that genes regulating xylem differentiation were down-regulated, whereas genes regulating phloem differentiation were up-regulated. Correspondingly, PtrHB7 overexpression enhanced differentiation of cambial cells toward xylem cells but inhibited phloem differentiation. PtrHB7 regulation on cambial cell differentiation was associated with its transcript abundance. Together, the results demonstrated that PtrHB7 plays a critical role in controlling a balanced differentiation between secondary xylem and phloem tissues in the process of Populus secondary growth in a dosage-dependent manner.

关键词： HD-Zip III cambium xylem fiber cell secondary growth Populus.

Phosphorylation of LTF1, an MYB Transcription Factor in Populus, Acts as a Sensory Switch Regulating lignin Biosynthesis in Wood Cells

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Molecular Plant 2019年第10期12卷 1325-1337页

作者： Jinshan Gui Laifu Luo Yu Zhong Jiayan Sun Toshiaki Umezawa laigeng li National Key Laboratory of Plant Molecular Genetics and CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of the Chinese Academy of Sciences Beijing 100049China School of life Science Lanzhou UniversityLanzhou 730000China Research Institute for Sustainable Humanosphere Kyoto UniversityUjiKyoto 611-0011Japan

lignin is specifically deposited in plant secondary cell walls,and initiation of lignin biosynthesis is regulated by a variety of developmental and environmental ***,the mechanisms governing the regulation of lignin biosynthesis remain to be *** this study,we identified a lignin biosynthesis-associated transcription factor(LTF)from Populus,LTF1,which binds the promoter of a key lignin biosynthetic gene encoding 4-coumarate-CoA ligase(4CL).We showed that LTF1 in its unphosphorylated state functions as a regulator restraining lignin *** LTF1 becomes phosphorylated by PdMPK6 in response to external stimuli such as wounding,it undergoes degradation through a proteasome pathway,resulting in activation of *** of a phosphorylation-null mutant version of LTF1 led to stable protein accumulation and persistent attenuation of lignification in wood *** together,our study reveals a mechanism whereby LTF1 phosphorylation acts as a sensory switch to regulate lignin biosynthesis in response to environmental *** discovery of novel modulators and mechanisms modifying lignin biosynthesis has important implications for improving the utilization of cell-wall biomass.

关键词： lignin Populus secondary xylem cell wall

Biosynthesis and functions of metabolites

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Science China(life Sciences) 2017年第11期60卷 1280-1282页

作者： juncong sun bing leng guoan sheng xin fang laigeng li jirong huang xiaoquan qi xiaoya chen institute of botany chinese academy of sciences Beijing 100093China chinese society for plant biology Shanghai 200031China institute of plant phystology and ecology shanghai institutes for biological scienceschinese academy of sciencesShanghai 200032China college of life and environmental sciences shanghai normal universityShanghai 200234China

Metabolism is the basic activity of life. Two in- ternational conferences, including the 4th Interna- tional Conference on Plant Metabolism （ICPM2017, http：//***/2017/***）, and the 13th International Meeting on Biosynthesis, Function and Synthetic Biology of Isoprenoids （TERPNET2017,http：//***/2017/***） were concurrently convened side by side in Dalian from July 16 to 20, 2017.

关键词： Biosynthesis functions of metabolites

A brief view of international conference on plant cell wall biology 2017

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Science Bulletin 2017年第20期62卷 1357-1358页

作者： Xin Fang Juncong Sun Bing Leng Guoan Sheng Jirong Huang Xiaoquan Qi Xiaoya Chen laigeng li Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China Institute of Botuny Chinese Academy of Sdences Beijing 100093 China Chinese Society for Plant Biology Shanghai 200031 China College of life and Environmental Sdences Shanghai Normal University Shanghai 200234 China

The triennial International Conference on Plant Cell Wall Biology has been held 5 times since it was initiated in the United States. PCWB2017 for the first time is organized in China. The conference was attended with more than 220 participants and featured with oral and poster presentations, reflecting the contemporarv status of plant cell wall studies.

关键词： nternational conference on plant cell wall biology 2017 triennial

Shortened Basal Internodes Encodes a Gibberellin 2-Oxidase and Contributes to Lodging Resistance in Rice

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Molecular Plant 2018年第2期11卷 288-299页

作者： Chang liu Jinshan Gui Chenjian Fu Hasi Yu Dongliang Song Junhui Shen Peng Qin Xuanming liu Bin Han Yuanzhu Yang laigeng li National Key Laboratory of Plant Molecular Genetics and CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology Chinese Academy of Sciences Shanghai 200032 China Yuan Longping Agriculture High-Tech Co. Ltd. Hunan 410001 China Hunan University Hunan 410082 China University of the Chinese Academy of Sciences Beijing 100049 China National Center of Plant Gene Research and CAS Center for Excellence in Molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of Sciences Shanghai 200233 China Hunan Ava Seed Research Institute Hunan 410119 China Hunan Engineering Laboratory for Disease and Insect-Resistant Rice Breeding Hunan 410119 China

Breeding semi-dwarf varieties to improve lodging resistance has been proven to be enormously successful in increasing grain yield since the advent of the ＂green revolution.＂ However, the breeding of the majority of semi-dwarf rice varieties in Asia has been dependent mainly on genetic introduction of the mutant alleles of SD1, which encodes a gibberellin （GA） 20-oxidase, OsGA20ox2, for catalyzing GA biosynthesis. Here, we report a new rice lodging-resistance gene, Shortened Basal lnternodes （SBI）, which encodes a gibberellin 2- oxidase and specifically controls the elongation of culm basal internodes through deactivating GA activity. SBI is predominantly expressed in culm basal internodes. Genetic analyses indicate that SBI is a semidominant gene affecting rice height and lodging resistance. SBI allelic variants display different activities and are associated with the height of rice varieties. Breeding with higher activity of the SBI allele generates new rice varieties with improved lodging resistance and increased yield. The discovery of the SB! provides a desirable gene resource for producing semi-dwarf rice phenotypes and offers an effective strategy for breeding rice varieties with enhanced lodging resistance and high yield.

关键词： Shortened Basal Internodes gibberellin activity lodging resistance yield rice

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植物细胞壁研究与生物质改造利用

科学通报 2016年第34期61卷 3623-3629页

作者：黄成李来庚中国科学院上海生命科学研究院植物生理生态研究所植物分子遗传国家重点实验室分子植物卓越中心上海200032

细胞壁是植物细胞区别于动物细胞的重要结构特征之一,在植物细胞生长发育和环境响应中发挥重要作用.同时,地球上陆生植物光合作用产物约70%存于细胞壁中,细胞壁生物质是地球上最丰富的可再生资源.植物如何将光合产物合成为细胞壁成分?... 详细信息

细胞壁是植物细胞区别于动物细胞的重要结构特征之一,在植物细胞生长发育和环境响应中发挥重要作用.同时,地球上陆生植物光合作用产物约70%存于细胞壁中,细胞壁生物质是地球上最丰富的可再生资源.植物如何将光合产物合成为细胞壁成分?人类如何有效利用大量的、可再生的细胞壁生物质资源?这些问题近年来受到了广泛的关注.本文对细胞壁合成、利用生物技术对细胞壁生物质进行改造,以及细胞壁生物质利用等研究进行简要介绍和综述.

关键词：植物细胞壁纤维素木质素半纤维素纤维生物质