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Sugarcane transcription factor ScWRKY4 negatively regulates resistance to pathogen infection through the JA signaling pathway

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The Crop Journal 2024年第1期12卷 164-176页

作者： Dongjiao Wang Wei Wang Shoujian Zang Liqian Qin Yanlan Liang Peixia Lin Yachun Su youxiong que Key Laboratory of Sugarcane Biology and Genetic Breeding Ministry of Agriculture and Rural AffairsKey Laboratory of GeneticsBreeding and Multiple Utilization of CropsMinistry of EducationCollege of AgricultureFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina National Key Laboratory for Tropical Crop Breeding Institute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural SciencesSanya 572024HainanChina

WRKY transcription factors,transcriptional regulators unique to plants,play an important role in defense response to pathogen ***,the resistance mechanisms of WRKY genes in sugarcane remain *** the present study,gene ontology(GO)enrichment analysis revealed that WRKY gene family in sugarcane was extensively involved in the response to biotic stress and in defense *** identified gene ScWRKY4,a classⅡc member of the WRKY gene family,in sugarcane cultivar *** gene was induced by salicylic acid(SA)and methyl jasmonate(MeJA)***,expression of ScWRKY4 was down-regulated in smut-resistant sugarcane cultivars but up-regulated in smutsusceptible sugarcane cultivars infected with Sporisorium ***,stable overexpression of the ScWRKY4 gene in Nicotiana benthamiana enhanced susceptibility to Fusarium solani *** and caused down-regulated expression of immune marker-related *** analysis indicated suppressed expression of most JAZ genes in the signal transduction ***4 interacted with ScJAZ13 to repress its *** thus hypothesized that the ScWRKY4 gene was involved in the regulatory network of plant disease resistance,most likely through the JA signaling *** present study depicting the molecular involvement of ScWRKY4 in sugarcane disease resistance lays a foundation for future investigation.

关键词： Disease resistance Expression profile Transcriptome analysis WRKY transcription factors

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Isolating QTL controlling sugarcane leaf blight resistance using a two-way pseudo-testcross strategy

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The Crop Journal 2022年第4期10卷 1131-1140页

作者： Zhoutao Wang Guilong Lu Qibin Wu Aitian Li youxiong que Liping Xu Key Laboratory of Sugarcane Biology and Genetic Breeding Ministry of Agriculture and Rural AffairsNational Engineering Research Center for SugarcaneFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Dehong Sugarcane Science Institute Dehong 678400YunnanChina

Sugarcane leaf blight(SLB),caused by Stagonospora tainanensis,is one of the most harmful fungal diseases,threatening the sugarcane industry and causing high losses of cane yield and sugar in susceptible *** a two-way pseudo-testcross mapping strategy in combination with array genotyping,two high-density genetic maps were constructed for sugarcane cultivars YT93-159 and ROC22 with mean densities of respectively 3.0 and 3.5 cM per marker,and covering respectively 4485 and 2720 cM of genetic *** maps showed highly conserved colinearity with the genome of the ancestral species Saccharum officinarum,supporting the reliability of the linkage configurations of the *** trait loci(QTL)analysis of SLB resistance revealed six QTL(qSLB-1–qSLB-6).The major QTL qSLB-1 explaining 16.4%of phenotypic variance was assigned as the main QTL,and the total percentages of phenotypic variance explained in YT93-159 and ROC22 were 37.9%and 17.6%,*** transcription factor and seven pathogen receptor genes lying in the qSLB-1 interval were highly expressed and are proposed as candidate causal genes for SLB resistance.

关键词： Sugarcane Genetic map Leaf blight QTL mapping Causal gene

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Sugarcane transcription factor ScWRKY4 negatively regulates resistance to pathogen infection through the JA signaling pathway

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The Crop Journal 2024年第1期

作者： Dongjiao Wang Wei Wang Shoujian Zang Liqian Qin Yanlan Liang Peixia Lin Yachun Su youxiong que

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Overexpression of a sugarcane ScCaM gene negatively regulates salinity and drought stress responses in transgenic Arabidopsis thaliana

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BIOCELL 2023年第1期47卷 215-225页

作者： JINXIAN LIU JINGFANG FENG CHANG ZHANG YONGJUAN REN WEIHUA SU GUANGHENG WU XIANYU FU NING HUANG youxiong que HUI LING JUN LUO College of Tea and Food Science Fujian Provincial Key Laboratory of Eco-Industrial Green TechnologyWuyi UniversityNanping354300China Key Laboratory of Sugarcane Biology and Genetic Breeding Ministry of AgricultureKey Laboratory of GeneticsBreeding and Multiple Utilization of CropsMinistry of EducationCollege of AgricultureFujian Agriculture and Forestry UniversityFuzhou350002China College of Agriculture Yulin Normal UniversityYulin537000China

Calmodulin(CaM)proteins play a key role in signal transduction under various *** the present study,the effects of a sugarcane ScCaM gene(NCBI accession number:GQ246454)on drought and salt stress tolerance in transgenic Arabidopsis thaliana and Escherichia coli cells were *** results demonstrated a significant negative role of ScCaM in the drought and salt stress tolerance of transgenic lines of ***,as indicated by the *** addition,the expression of AtP5CS and AtRD29A,two genes tightly related to stress resistance,was significantly lower in the overexpression lines than in the wild *** growth of *** BL21 cells expressing ScCaM showed weaker tolerance under mannitol and NaCl *** together,this study revealed that the ScCaM gene plays a negative regulatory role in both mannitol and NaCl stresses,and it possibly exerts protective mechanisms common in both prokaryotes and eukaryotes under stress conditions.

关键词： Calmodulin(CaM) Signal transduction Drought Salt stress Sugarcane

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A Sugarcane Smut Fungus Effector Hijacks Plant VSR-mediated Vacuolar Trafficking to Evade Host Immune Detection

A Sugarcane Smut Fungus Effector Hijacks Plant VSR-mediated ...

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中国植物病理学会2023年学术年会

作者： LING Hui FU Xueqin HUANG Ning ZHONG Zaofa CUI Haitao que youxiong

The smut fungus Sporisorium scitamineum causes a prevalent disease in sugarcane ***,the mechanisms by which the smut fungus effectors facilitate infection and/or evade detection by host immune system remain largely ***,we show that sugarcane vacuolar sorting receptor gene(ScVSR1) has a strong negative(correlation with several putative *** effector genes in the gene co-expression *** overexpression of Sc VSR1 in Arabidopsis leads to reduced resistance to a fungal pathogen,causing powdery mildew,indicating the negative role of ScVSR1 in ***,among the co-expressed *** effectors,SsPE15 physically interacts with *** found that SsPE15 is a secreted protein and is sorted into the prevacuolar compartment(PVC) by interacting with ScVSRl in plant ***,the deletion of SsPE15 in *** enhances fungal pathogenicity,suggesting that SsPE15 might be detected by the host immune system and subsequently activates defense ***,the fusion of the SsPE15 CT domain containing the VSR sorting signal to bacterial effector AvrRpt2 could greatly affect AvrRpt2-triggered programmed cell death in Arabidopsis,in a manner partially dependent on VSR1 and *** thus propose that the fungal effector SsPE15 hijacks the intimal transport system for evading immune detection.

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近年我国甘蔗品种的育种成就与发展趋势

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中国糖料 2024年第1期46卷 87-92页

作者：张跃彬赵培方胡朝晖阙友雄热带作物生物育种全国重点实验室昆明650205 云南省农业科学院甘蔗研究所/云南省甘蔗遗传改良重点实验室云南开远661699 广东省科学院南繁种业研究所/全国甘蔗糖业信息中心广州510316

甘蔗是我国主要的糖料作物,不断进行品种改良更新是甘蔗产业持续发展的重要保障。近20年来,我国甘蔗育种机构根据主产蔗区旱坡地蔗区占70%以上,当家品种‘新台糖22号’、‘新台糖20号’等低产低糖的状况,不断收集和引进优异甘蔗种质资源... 详细信息

甘蔗是我国主要的糖料作物,不断进行品种改良更新是甘蔗产业持续发展的重要保障。近20年来,我国甘蔗育种机构根据主产蔗区旱坡地蔗区占70%以上,当家品种‘新台糖22号’、‘新台糖20号’等低产低糖的状况,不断收集和引进优异甘蔗种质资源,使我国种质资源总量达5962份,发掘和创制了‘CP81-1254’、‘桂糖92-66’、‘云蔗94-343’等一批优异育种亲本;同时,攻克杂交利用技术,研究形成集“家系评价、早期抗性鉴定、糖分高效检测、理想株型选择”为一体的育种技术体系,成功育成了‘桂糖42号’、‘桂柳05136’、‘云蔗081609’、‘桂糖44号’、‘云蔗0551’等一批高糖高产新品种,实现了我国第五代品种更新。面对我国蔗糖产业发展的新要求,当前我国甘蔗育种还存在适宜机械化作业的品种改良滞后和甘蔗生物育种进展缓慢等问题,今后将加强以机械化应用为目标的抗倒伏、宿根性强、分蘖力强的品种选育,加快转基因甘蔗新品种的培育,持续强化健康种苗的繁育推广应用。

关键词：甘蔗品种改良发展趋势

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Mapping of QTLs and screening candidate genes associated with the ability of sugarcane tillering and ratooning

Mapping of QTLs and screening candidate genes associated wit...

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第二十届中国作物学会学术年会

作者： Ting Wang Fu Xu Zhoutao Wang Qibin Wu Wei Cheng youxiong que Liping Xu National Engineering Research Center for Sugarcane Key Laboratory of Sugarcane Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Agriculture Fujian Agriculture and Forestry University

Sugarcane(Saccharum spp. hybrids) accounts for more than 85% of the Chinese and about 80% of the world's sugar production. Tillering and ratooning are important agronomic traits for sugarcane genetic improvement, due to sugarcane being a typically ratoon cultivated crop, and ratoon cultivation is thus adopted as a common cropping system in each producing region. Compared to the plant cane, the ratoon cane can save costs at the planting stage and in the process of cultivation management. Additionally, due to the strong root system, the ratoon cane grows faster than the plant cane, resulting in more efficient use of light energy and earlier maturation. Therefore, the sugar content in the ratoon cane is mostly higher than that in the plant cane, especially at the early stage of sugarcane maturity. The processes of sugarcane tillering and ratooning, which directly affect the yield of plant cane and ratoon, are of vital importance to the population establishment and the effective stalk number per unit area. In the present study, the phenotypic data of 285 F1 progenies from a cross of sugarcane varieties YT93-159 × ROC22 were collected in eight environments, which consisted of plant cane and ratoon cultivated in three different ecological sites. The broad sense heritability(H2) of the tillering and the ratoon sprouting was 0.64 and 0.63, respectively, indicating that they were middle to middle-high heritable traits, and there is a significantly positive correlation between the two traits. Furthermore, a total of 26 quantitative trait loci(QTLs) related to the tillering ability and 11 QTLs associated with the ratooning ability were mapped on two high-quality genetic maps derived from a 100K SNP chip, and their phenotypic variance explained(PVE) ranged from 4.27–25.70% and 6.20–13.54%, respectively. Among them, four consistent QTLs of qPCTR-R9, qPCTR-Y28, qPCTRY60/qRSR-Y60 and PCTRY8-1/qRSR-Y8 were mapped in two environments, of which, qPCTR-Y8-1/qRSR-Y8 had the PVEs of 11.

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Microstructure and thermal properties of dissimilar M300–CuCr1Zr alloys by multi-material laser-based powder bed fusion

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 118-128页

作者： Xiaoshuang Li Dmitry Sukhomlinov Zaiqing que Aerosint SA B-4040 HerstalBelgium Aalto University Department of Chemical and Metallurgical EngineeringEspoo 02150Finland VTT Technical Research Centre of Finland Espoo 02044Finland

Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-conductive CuCr1Zr with hard M300 tool *** interface configurations of M300 on CuCr1Zr and CuCr1Zr on M300 were investigated. Ultra-fine grains form at the interface due to the low mutual solubility of Cu and steel. The material mixing zone size is dependent on the configurations and tunable in the range of0.1–0.3 mm by introducing a separate set of parameters for the interface layers. Microcracks and pores mainly occur in the transition *** of these defects, the thermal diffusivity of bimetallic parts with 50vol% of CuCr1Zr significantly increases by 70%–150%compared to pure M300. The thermal diffusivity of CuCr1Zr and the hardness of M300 steel can be enhanced simultaneously by applying the aging heat treatment.

关键词： multi-material additive manufacturing laser-based powder bed fusion thermal diffusivity dissimilar metals copper alloy

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A Transcription Factor ScWRKY4 in Sugarcane Negatively Regulates the Resistance to Pathogen Infection

A Transcription Factor ScWRKY4 in Sugarcane Negatively Regul...

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中国植物病理学会2023年学术年会

作者： WANG Dongjiao WANG Wei ZANG Shoujian QIN Liqian LIN Peixia LIANG Yanlan SU Yachun que youxiong

WRKY transcription factor, the transcriptional regulators unique to plants, plays an important role in plant defense response to pathogen ***, research on the disease resistance mechanism of WRKY gene in sugarcane is still ***, GO enrichment analysis revealed that WRKY gene family in sugarcane was extensively involved in the response to biotic stress and in the process of defence ***, we identified a ScWRKYA gene, a member of class lie of the WRKY gene family, from the sugarcane cultivar *** upstream promoter contained multiple cis-acting elements,which were associated with stress, growth and development and hormone *** gene could be induced by the stresses of salicylic acid( SA) and methyl jasmonate( MeJA).The expression of the ScWRKY4 gene was down-regulated in smut-resistant sugarcane cultivars and up-regulated in smut-susceptible sugarcane cultivars under Sporisorium scitamineum *** overexpression of the ScWRKYA gene in Nicotiana benthamiana enhanced susceptibility to Fusarium solani *** and caused the down-regulated expression of immune marker-related *** analysis indicated that, at 0 and 2 d after inoculation with *** ***, tobacco plants stably overexpressing the ScWRKYA gene were significantly enriched for differentially expressed genes in plant hormone signal transduction pathway,plant-pathogen interaction pathway and MAPK signaling *** is interesting that, the expression of most JAZ genes was suppressed in plant signal transduction *** addition, ScWRKY4 could interact with ScJAZ13 and repress the expression of *** above results confirmed that the ScWRKYA gene was involved in the regulatory network of plant disease resistance through the JA signaling pathway, and laid the foundation for the subsequent investigation on the molecular mechanism of the ScWRKYA gene involved in sugarcane disease resistance.

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Sugarcane ShNPR2 Gene and Its Promoter Positively Respond to Pathogen Infection and Exogenous Hormone Stresses

Sugarcane ShNPR2 Gene and Its Promoter Positively Respond to...

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中国植物病理学会2023年学术年会

作者： ZANG Shoujian HUANG Tingchen WU Guran WANG Dongjiao QIN Liqian LIANG Yanlan LIN Peixia SU Yachun que youxiong

Nonexpressor of pathogenesis-related genes 1(NPR 1),as a key regulatory factor in the plant salicylic acid(SA) signal transduction pathway,plays a core regulatory role in plant systemic disease *** the present study,a total of 18 SsNPR and 35 SoNPR genes were identified from sugarcane wild species Saccharum spontaneum and tropical species ***,*** analysis demonstrated that NPR proteins could be clustered into three *** analysis revealed a close homology between NPR genes in *** and *** data analysis indicated that SsNPR genes were tissue-specifically expressed and differentially expressed in different genotypes of sugarcane interacting with smut fungus.A differentially expressed gene,ShNPR2,was then cloned from the sugarcane cultivar ***2 was found to be a nuclear protein without transcriptional self-activation activity,constitutively expressed in different tissues of ROC22,and response to the stresses of methyl jasmonate(MeJA),abscisic acid(ABA),and *** is worth noting that transient overexpression of the ShNPR2 gene in Nicotiana benthamiana showed a higher sensitivity to the infection of Ralstonia solauacearum and Fusarium solani ***,and this regulatory effect was closely related to the expression changer of genes related to hypersensitive reaction(HR),SA,and ethylene(ET) synthesis *** addition,the promoter of the ShNPR2 gene,pro-ShNPR2,was isolated from ROC22 and found to have transcriptional ***,the activity of pro-ShNPR2 was upregulated by exogenous treatments with MeJA,ABA,and *** present study provided a theoretical and practical basis for comprehensively understanding the sequence characteristics,expression status,and disease resistance function of sugarcane NPR genes.

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