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Transcriptome analysis of purple pigment formation in Colocasia esculenta

BIOCELL 2021年第3期45卷 785-796页

作者： fanglian he WEIQING DONG SHAOLONG WEI ZUYANG QIU JINGLI HUANG HUIPING JIANG SHIYU HUANG LILI LIU Biotechnology Research Institute Guangxi Zhuang Nationality Autonomous Region Academy of Agricultural SciencesNanning530007China Guangxi Zhuang Nationality Autonomous Region Academy of Agricultural Sciences Nanning530007China Lipu Municipal Bureau of Agriculture and Rural Affairs Lipu546600China College of Agriculture Guangxi UniversityNanning530004China

Taro(Colocasia esculenta(L.)Schott)is an important crop in Africa,Southeast Asia,and subtropics and is used as a food and *** purple color pigmentation is an appealing character in *** sampled taro corms of the cultivar‘Lipu Taro’at four developmental stages,including LPYS1(without purple pigment,50 days of development(DOD)),LPYS2(very few purple pigments,75 DOD),LPYS3(moderate purple pigments,115 DOD)and LPYS4(high purple pigments,205 DOD).The purpose of our study was to identify the key genes underpinning the purple pigmentation in taro based on *** RNA-Seq,6453 differentially expressed transcripts(DETs)were identified between purple and non-purple pigmented *** identified 41 and 12 flavonoid and anthocyanin related DETs transcripts,*** DETs were upregulated at LPYS2,LPYS3,and LPYS4 as compared to LPYS1,indicating their positive contribution to the color formation in ***,we identified several DETs encoding for transcription factors,including MYB and bHLH,known to be major regulators of structural genes involved in the flavonoid-anthocyanin ***,we reported several plant hormones(ethylene,auxin,gibberellin,jasmonic acid,and cytokinin)related DETs,which are predicted to play important roles in the corm *** regulation of transcripts representing the flavonoid-anthocyanin biosynthesis pathway,plant hormone transduction pathway,and transcription factors may have key roles in purple pigmentation in *** findings will facilitate future research on improving the quality and appeal of taro.

关键词： Anthocyanin Colocasia esculenta Color formation Plant hormones Gene expression Transcription factors

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Cell biological mechanism for triggering of ABA accumulation under water stress in Vicia faba leaves

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Science China(Life Sciences) 2001年第4期44卷 421-428页

作者：张大鹏何芳莲贾文锁 1. Laboratory of Molecular Developmental Biology of Fruit Trees Laboratory of Plant Physiology and Biochemistry China Agricultural University 100094 Beijing China

Water stress-induced ABA accumulation is a cellular signaling process from water stress perception to activation of genes encoding key enzymes of ABA biosynthesis, of which the water stress-signal perception by cells or triggering mechanism of the ABA accumulation is the center in the whole process of ABA related-stress signaling in plants. The cell biological mechanism for triggering of ABA accumulation under water stress was studied in leaves of Vicia faba. Mannitol at 890 mmol· kg-1 osmotic concentration induced an increase of more than 5 times in ABA concentra-tion in detached leaf tissues, but the same concentration of mannitol only induced an increase of less than 40 % in ABA concentration in protoplasts. Like in detached leaf tissues, ABA concentra-tion in isolated cells increased more than 10 times under the treatment of mannitol at 890 mmol·kg-1 concentration, suggesting that the interaction between plasmalemma and cell wall was essential to triggering of the water stress-induced ABA accumulation. Neither Ca2+-che- lating agent EGTA nor Ca2+ channel activator A23187 nor the two cytoskeleton inhibitors, colchicine and cyto-chalasin B, had any effect on water stress-induced ABA accumulation. Interestingly water stress-induced ABA accumulation was effectively inhibited by a non-plasmalemma-perme- able sulfhy-dryl-modifier PCMBS (p-chloromercuriphenyl-sulfonic acid), suggesting that plasmalemma pro-tein(s) may be involved in the triggering of water stress-induced ABA accumulation, and the protein may contain sulfhydryl group at its function domain.

关键词： water stress, ABA (abscisic acid), PCMBS (p-chloromercuriphenyl-sulfonic acid), cytoskeleton, Ca2+, Vicia faba.

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High Efficiency of Propagation for Sagittaria sagittifolia Using a Temporary Immersion Bioreactor System

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Journal of Agricultural Science and Technology(A) 2016年第3期6卷 161-170页

作者： Meiping Gao Zhicheng Lin Cong Luo Zhang Chi Zhihuan Mo fanglian he Wen Jiang Lijuan Chen Xinhua he Shaolong Wei Biotechnology Research Institute Guangxi Academy of Agricultural Sciences No. 174 Daxue Road Nanning Guangxi 530007 China College of Agriculture Guangxi University No. 100 Daxue Road Nanning Guangxi 530007 China Agricultural Bureau in Ping Le Areas Guangxi 542400 China

Although several studies have reported on the propagation of the Sagittaria sagittifolia to date, none of these methods have efficiently achieved the mass production of these plants. The present study aimed to investigate the propagation and growth of S. sagittifolia using a temporary immersion bioreactor system （TIBS） compared with conventional semi-solid and liquid culture. The effect of different immersion frequencies and immersion times together with supplementation of various plant growth regulators to the Murashige and Skoog （MS） medium was evaluated on shoot proliferation and plant growth. The results showed that the higher immersion frequency （every 6 h） and shorter immersion time （3 min and 10 rain） in medium containing 4 mg/L BA and 0.1 mg/L NAA produced the highest multiplication rate （23）, which are significantly higher than conventional semi-solid （3.6） and liquid （4.5） method, and the best plant growth parameter. While, the lower immersion frequency and longer immersion time （30 rain every 12 h and 60 min every 24 h） induced vitrification and pollution rate in shoot tips 16.6% and 19%, 42% and 37%, respectively. There is distinct decrease in pollution rate （8.3%） in TIBS （10 min every 6 h） compared with the conventional semi-solid and liquid cultures. Medium containing 4 mg/L BA and 0.5 mg/L NAA using 10 min immersion every 6 h showed satisfaction at the rooting stage, with high shoot proliferation rate （21.6）, 100% rooting and 94% plant survival. Therefore, applying TIBS in S. sagittifolia is an efficient method for scaling up the production of plantlets with high quality seedlings.

关键词： Sagittaria sagittifolia temporary immersion bioreactor system proliferation and growth root formation.

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Gut microbiota-astrocyte axis: new insights into age-related cognitive decline

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Neural Regeneration Research 2025年第4期20卷 990-1008页

作者： Lan Zhang Jingge Wei Xilei Liu Dai Li Xiaoqi Pang fanglian Chen Hailong Cao Ping Lei Haihe Laboratory of Cell Ecosystem Department of GeriatricsTianjin Medical University General HospitalTianjinChina Tianjin Geriatrics Institute Tianjin Medical University General HospitalTianjinChina Department of Gastroenterology and hepatology Tianjin Medical University General HospitalNational Key Clinical SpecialtyTianjin Institute of Digestive DiseasesTianjin Key Laboratory of Digestive DiseasesTianjinChina Department of Urology Tianjin Medical University General HospitalTianjinChina Tianjin Neurological Institution Tianjin Medical University General HospitalTianjinChina

With the rapidly aging human population,age-related cognitive decline and dementia are becoming increasingly prevalent *** is considered the main risk factor for cognitive decline and acts through alterations in the composition of the gut microbiota,microbial metabolites,and the functions of *** microbiota–gut–brain axis has been the focus of multiple studies and is closely associated with cognitive *** article provides a comprehensive review of the specific changes that occur in the composition of the gut microbiota and microbial metabolites in older individuals and discusses how the aging of astrocytes and reactive astrocytosis are closely related to age-related cognitive decline and neurodegenerative *** article also summarizes the gut microbiota components that affect astrocyte function,mainly through the vagus nerve,immune responses,circadian rhythms,and microbial ***,this article summarizes the mechanism by which the gut microbiota–astrocyte axis plays a role in Alzheimer’s and Parkinson’s *** findings have revealed the critical role of the microbiota–astrocyte axis in age-related cognitive decline,aiding in a deeper understanding of potential gut microbiome-based adjuvant therapy strategies for this condition.

关键词： age aging Alzheimer’s disease astrocytes cognitive decline dementia gut microbiota gut–brain axis microbial metabolites neuroinflammation Parkinson’s disease

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Morphogenesis of Chinese Water Chestnut Pistil and Pollen Tube during Germination

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Asian Agricultural Research 2016年第5期8卷 74-76,79页

作者： Kunpeng OU fanglian he Yan WANG Wen JIANG Meiping GAO Zhiqiang BI Lijuan CheN Weiqing DONG Jie GUI Biotechnology Research Institute Guangxi Academy of Agricultural Sciences

With the forms of pistil stigma of " Guiti 2" Chinese water chestnut cultivar during the pollination as the object of observation,we reveal the pollination process of Chinese water chestnut from the microscopic point of view,to provide reference for Chinese water chestnut crossbreeding. The results show that the Chinese water chestnut pistil has 2- 4 stigmas which present white filament and vascular bundle forms,and the vessels on epidermis are thick with long translucent branched hairs; after pollination,pollen grains are tightly bound on branched hairs,and after identification,the pollen tube can penetrate branched hairs,continue to grow,and transfer the genetic material in pollen to vascular bundle.

关键词： Chinese water chestnut Stigma Branched hairs Pollination

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Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han Bo Yan Pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong Qiang Liu fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

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荸荠EdAGPL1基因的克隆及表达分析

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分子植物育种 2021年第17期19卷 5654-5661页

作者：何芳练邱祖杨董伟清刘莉莉广西壮族自治区农业科学院生物技术研究所南宁530007 荔浦市农业农村局荔浦546600

为了克隆荸荠AGPase大亚基基因(EdAGPL1)cDNA序列,分析其序列结构特征及其在荸荠不同组织和球茎发育过程的表达情况。以荸荠‘桂林马蹄’为研究材料,通过RT-PCR技术克隆得到EdAGPL1基因并对其进行生物信息学分析,采用实时荧光定量PCR技... 详细信息

为了克隆荸荠AGPase大亚基基因(EdAGPL1)cDNA序列,分析其序列结构特征及其在荸荠不同组织和球茎发育过程的表达情况。以荸荠‘桂林马蹄’为研究材料,通过RT-PCR技术克隆得到EdAGPL1基因并对其进行生物信息学分析,采用实时荧光定量PCR技术分析其不同组织和球茎发育过程的表达情况。结果表明,克隆获得EdAGPL1基因长度为1744 bp,其开放阅读框为1599 bp,编码532个氨基酸,蛋白质分子质量为58.84 kD,等电点为7.54,具有NTP_transferase和PbH1结构域;二级结构组成比例为螺旋结构(helix)占13.72%,链状结构(Strand)占25.19%,无规则卷曲(Loop)占61.09%;三级结构由17个α-螺旋、34个β-折叠和51个β-转角(卷曲)构成。同源性及系统进化分析表明,EdAGPL1与其他植物AGPL蛋白氨基酸序列的同源性为57.54%~61.64%,在进化上与其他植物亲缘关系较远。荧光定量PCR分析表明,EdAGPL1在不同组织的表达情况为球茎>叶状茎>匍匐茎>根;在球茎各发育阶段,EdAGPL1在初期表达量最高,随后降低保持较稳定水平。EdAGPL1基因表达具有时空、组织特异性,可能是调控淀粉合成代谢途径中的关键基因,对该基因的研究有助于后续阐明荸荠淀粉合成的调控机理,进而为高淀粉品种选育提供理论依据。

关键词：荸荠淀粉合成酶基因克隆表达分析

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芋ADP-葡萄糖焦磷酸化酶(AGPase)基因家族的克隆、生物信息学及表达分析

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热带作物学报 2022年第8期43卷 1554-1564页

作者：何芳练刘莉莉蒋慧萍邱祖杨黄诗宇董伟清广西壮族自治区农业科学院生物技术研究所广西南宁530007 荔浦市农业农村局广西荔浦546600

芋(Colocasia esculenta)为天南星科芋属成员,在世界范围内广泛种植,其球茎主要贮藏物质为淀粉。ADP-葡萄糖焦磷酸化酶(AGPase)是淀粉合成的第一个关键酶和限速酶,在植物淀粉合成中发挥关键作用,但目前关于芋AGPase基因家族的分子结构... 详细信息

芋(Colocasia esculenta)为天南星科芋属成员,在世界范围内广泛种植,其球茎主要贮藏物质为淀粉。ADP-葡萄糖焦磷酸化酶(AGPase)是淀粉合成的第一个关键酶和限速酶,在植物淀粉合成中发挥关键作用,但目前关于芋AGPase基因家族的分子结构特征和表达模式还不清楚。本研究以芋新品种‘荔浦芋1号’为试材,从全长转录组注释信息中筛选到6个AGPase基因家族成员,利用RT-PCR技术克隆了6个基因的编码区,利用生物信息学对其理化性质、进化关系和保守motif进行分析;同时利用转录组学和荧光定量RT-PCR技术对6个基因在不同组织和球茎不同发育阶段的表达模式进行分析。结果表明:克隆获得6个芋AGPase基因编码区的cDNA序列,序列长度为1398~2028bp,编码的蛋白大小为350~543 aa,其中4个基因(CeAGPL1~CeAGPL4)编码AGPase的大亚基,2个基因(CeAGPS1,CeAGPS2)编码AGPase的小亚基。系统进化分析显示,所有的AGPase分成了大亚基和小亚基2个群组,4个大亚基分在了大亚基组,2个小亚基分在了小亚基组。CeAGP家族蛋白分子质量范围为38753.22~59743.05kDa,等电点范围为5.64~8.82,亚细胞定位为叶绿体、淀粉体和细胞质等。蛋白的保守motif分析发现,CeAGP家族蛋白共预测到11个保守motif,6个motif功能注释为NTP_transferase,除CeAGPS2外,另外5个CeAGP蛋白均包含11个motif。在不同组织中,6个CeAGP基因均能在所有组织中表达,其中CeAGPL3和CeAGPS1基因在叶片和叶柄中高表达,CeAGPL1和CeAGPS1基因在球茎中高表达,6个CeAGP基因在根的表达量均较低。在球茎不同发育阶段中,CeAGPL1和CeAGPS1高表达且均表现先升高后降低的趋势,2个基因分别在4月龄和5月龄阶段的表达量最高。该研究结果为后续阐明芋淀粉合成的分子机制提供依据。

关键词：芋 AGPase 基因克隆表达分析

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芋淀粉分支酶(SBE)基因的鉴定、生物信息学及表达分析

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热带作物学报 2023年第7期44卷 1373-1382页

作者：董伟清刘莉莉蒋慧萍邱祖杨何芳练广西壮族自治区农业科学院生物技术研究所广西南宁530007 荔浦市农业农村局广西荔浦546600

淀粉分支酶(starch branching enzyme,SBE)在支链淀粉生物合成中发挥关键作用,直接影响淀粉的含量和结构。芋(Colocasia esculenta)是一种主要的块茎类作物,在世界上热带和亚热带地区广泛栽培。目前,SBE在芋中的研究很少,对SBE基因在芋... 详细信息

淀粉分支酶(starch branching enzyme,SBE)在支链淀粉生物合成中发挥关键作用,直接影响淀粉的含量和结构。芋(Colocasia esculenta)是一种主要的块茎类作物,在世界上热带和亚热带地区广泛栽培。目前,SBE在芋中的研究很少,对SBE基因在芋中的数量、分子结构特征和表达模式还不清楚。本研究首次对芋SBE基因进行了全面分析,鉴定了3个SBE基因(CeSBE1、CeSBE2和CeSBE3)。CeSBE1、CeSBE2和CeSBE3蛋白氨基酸数量分别为828、845和598,分子质量分别为92956.71、95625.13、69169.16 Da,等电点分别为5.22、5.41和7.36。系统进化分析显示3个CeSBE蛋白分别在3个不同的亚群。基因结构分析显示,CeSBE1、CeSBE2和CeSBE3外显子数量分别为16、22、10;保守结构域分析表明,CeSBE1和CeSBE2均具有alpha-amylase_C和alpha-amylase结构域及7个motif,而CeSBE3具有alpha-amylase和CBM_48结构域及3个motif。CeSBE基因启动子区域顺式作用元件分析表明,共预测到55个顺式作用元件,其中29个具有功能注释,涉及光响应、激素响应、植物生长发育及环境压力等相关元件。在不同组织中,3个CeSBE基因均能在所有组织中表达,其中CeSBE2在球茎和叶片显著表达(P<0.05);在球茎不同发育阶段中,CeSBE2在所有的发育阶段均有较高的表达量,呈现先升高后降低的表达趋势,在球茎发育120 d的表达量达到峰值。球茎不同发育阶段总淀粉和支链淀粉含量增加与CeSBE2表达量趋势一致,说明CeSBE2可能是芋支链淀粉生物合成的关键基因。本研究结果可为芋的产量、品质和营养性状的遗传改良提供基础。

关键词：芋淀粉分支酶生物信息学分析表达分析

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基于RAD-seq的荸荠SSR标记开发

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分子植物育种 2022年第1期20卷 210-217页

作者：何芳练董伟清邱祖杨蒋慧萍刘莉莉陈琦黄诗宇广西壮族自治区农业科学院生物技术研究所南宁530007 荔浦市农业农村局荔浦546600 南宁新技术创业者中心南宁530007

荸荠(Eleocharis dulcis)是一种重要的特色水生蔬菜,为开发用于荸荠遗传学研究的简单重复序列(SSR)分子标记,本研究基于RAD-seq技术对荸荠进行简化基因组测序,并进行SSR标记开发与引物设计。结果显示,共检测到5039个SSR位点,其中4127个... 详细信息

荸荠(Eleocharis dulcis)是一种重要的特色水生蔬菜,为开发用于荸荠遗传学研究的简单重复序列(SSR)分子标记,本研究基于RAD-seq技术对荸荠进行简化基因组测序,并进行SSR标记开发与引物设计。结果显示,共检测到5039个SSR位点,其中4127个SSR位点可利用并成功设计引物。在可利用的SSR位点中,三碱基重复基序类型所占比例最高,数量为1894个,占位点总数的45.89%;其次是二碱基重复基序类型,数量为1406个,占位点总数的34.07%。随机选取了100对引物进行有效性验证,扩增成功率为93%,从扩增成功的引物中选取83对引物对两个品种进行多态性检测,83对引物共得到232条条带,其中多态性条带为128条,具有多态性的引物为60对,多态性比率为72.28%。通过RAD-seq开发的荸荠SSR标记有效性和多态性较高,为后期荸荠种质资源的高效利用、品种的遗传改良及分子育种提供了基础。

关键词：荸荠(Eleocharis dulcis) RAD-seq SSR 分子标记

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