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The chromatin remodeler BRAHMA recruits HISTONE DEACETYLASE6 to regulate root growth inhibition in response to phosphate starvation in Arabidopsis

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Journal of Integrative Plant Biology 2022年第12期64卷 2314-2326页

作者： Tao Li Ruyue Zhang Viswanathan Satheesh Peng Wang Guojie Ma Jianfei Guo Guo-Yong An Mingguang Lei Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 201602China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China

Plasticity in root system architecture(RSA)allows plants to adapt to changing nutritional status in the *** availability is a major determinant of crop yield,and RSA remodeling is critical to increasing the efficiency of phosphorus *** substantial progress has been made in understanding the signaling mechanism driving phosphate starvation responses in plants,whether and how epigenetic regulatory mechanisms contribute is poorly ***,we report that the Switch defective/sucrose non-fermentable(SWI/SNF)ATPase BRAHMA(BRM)is involved in the local response to phosphate(Pi)*** loss of BRM function induces iron(Fe)accumulation through increased LOW phosphate ROOT1(LPR1)and LPR2 expression,reducing primary root length under Pi *** also demonstrate that BRM recruits the histone deacetylase(HDA)complex HDA6-HDC1 to facilitate histone H3 deacetylation at LPR loci,thereby negatively regulating local Pi deficiency *** is degraded under Pi deficiency conditions through the 26 S proteasome pathway,leading to increased histone H3 acetylation at the LPR ***,our data suggest that the chromatin remodeler BRM,in concert with HDA6,negatively regulates Fe-dependent local Pi starvation responses by transcriptionally repressing the RSA-related genes LPR1 and LPR2 in Arabidopsis thaliana.

关键词： BRM histone deacetylation phosphate starvation root development

Signaling Components Involved in Plant Responses to phosphate starvation

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Journal of Integrative Plant Biology 2008年第7期50卷 849-859页

作者： Hui Yuan Dong Liu Department of Biological Sciences and Biotechnology Tsinghua University Beijing 100084 China

Phosphorus is one of the macronutrients essential for plant growth and development. Many soils around the world are deficient in phosphate （Pi） which is the form of phosphorus that plants can absorb and utilize. To cope with the stress of Pi starvation, plants have evolved many elaborate strategies to enhance the acquisition and utilization of Pi from the environment. These strategies include morphological, biochemical and physiological responses which ultimately enable plants to better survive under low Pi conditions. Though these adaptive responses have been well described because of their ecological and agricultural importance, our studies on the molecular mechanisms underlying these responses are still in their infancy. In the last decade, significant progresses have been made towards the identification of the molecular components which are involved in the control of plant responses to Pi starvation. In this article, we first provide an overview of some major responses of plants to Pi starvation, then summarize what we have known so far about the signaling components involved in these responses, as well as the roles of sugar and phytohormones.

关键词： microRNA phosphate starvation phytohormones plant responses signal transduction pathways signaling components transcription factors.

GmPHR1, a Novel Homolog of the AtPHR1 Transcription Factor, Plays a Role in Plant Tolerance to phosphate starvation

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Journal of Integrative Agriculture 2014年第12期13卷 2584-2593页

作者： LI Xi-huan WANG Yun-jie WU Bing KONG You-bin LI Wen-long CHANG Wen-suo ZHANG Cai-ying North China Key Laboratory for Germplasm Resources Ministry of Education/Agricultural University of Hebei

GmPHR1 from soybean （Glycine max） was isolated and characterized. This novel homolog of the AtPHR1 transcription factor confers tolerance to inorganic phosphate （Pi）-starvation. The gene is 2 751 bp long, with an 819-bp open reading frame and ifve introns. Analysis of transcription activity in yeast revealed that the full-length GmPHR1 and its C-terminal activate the reporter genes for His, Ade and Ura, suggesting that the C-terminal peptide functions as a transcriptional activator. Quantitative real-time PCR indicated that patterns of GmPHR1 expression differed. For example, under low-Pi stress, this gene was quickly induced in the tolerant JD11 after 0.5 h, with expression then decreasing slowly before peaking at 12-24 h. By contrast, induction in the sensitive Niumaohuang （NMH） was slow, peaking at 6 h before decreasing quickly at 9 h. GmPHR1 showed sub-cellular localization in the nuclei of onion epidermal cells and Arabidopsis roots. Growth parameters in wild-type （WT） Arabidopsis plants as well as in overexpression （OE） transgenic lines were examined. Under low-Pi conditions, values for shoot, root and whole-plant dry weights, root to shoot ratios, and lengths of primary roots were signiifcantly greater in OE lines than in the WT. These data demonstrate that GmPHR1 has an important role in conferring tolerance to phosphate starvation.

关键词： GmPHR1 transcription factor AtPHR1 phosphate starvation low phosphate-stress tolerance soybean

GWAS unravels acid phosphatase ACP2 as a photosynthesis regulator under phosphate starvation conditions through modulating serine metabolism in rice

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Plant Communications 2024年第7期5卷 106-119页

作者： Sushuang Liu Zhan Xu Jemaa Essemine Yanmin Liu Chundong Liu Feixue Zhang Zubair Iqbal Mingnan Qu Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology Agricultural College of Yangzhou UniversityYangzhou 225009China Department of Life Sciences and Health Huzhou CollegeHuzhou 313000China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Institute of Crop Huzhou Academy of Agricultural SciencesHuzhou 313000China These authors contributed equally to this article

Inorganic phosphorus(Pi)deficiency significantly impacts plant growth,development,and photosynthetic *** study evaluated 206 rice accessions from a MiniCore population under both Pi-sufficient(Pi^(+))and Pi-starvation(Pi^(-))conditions in the field to assess photosynthetic phosphorus use efficiency(PPUE),defined as the ratio of A_(sat)^(Pi^(-))to A_(sat)^(Pi^(+)).A genome-wide association study and differential gene expression analyses identified an acid phosphatase gene(ACP2)that responds strongly to phosphate *** and knockout of ACP2 led to a 67%increase and 32%decrease in PPUE,respectively,compared with wild *** of an elite allele A,by substituting the v5 SNP G with A,resulted in an 18%increase in PPUE in gene-edited ACP2 rice *** phosphate-responsive gene PHR2 was found to transcriptionally activate ACP2 in parallel with PHR2 overexpression,resulting in an 11%increase in *** assays indicated that ACP2 primarily catalyzes the hydrolysis of phosphoethanolamine and *** addition,serine levels increased significantly in the ACP2^(vBG)overexpression line,along with a concomitant decrease in the expression of all nine genes involved in the photorespiratory *** of serine enhanced PPUE and reduced photorespiration rates in ACP2 mutants under Pi-starvation *** deduce that ACP2 plays a crucial role in promoting photosynthesis adaptation to Pi starvation by regulating serine metabolism in rice.

关键词： phosphate starvation GWAS photosynthetic adaption photosynthetic phosphate use efficiency genetic variation SNP rice

Primary root and root hair development regulation by OsAUX4 and its participation in the phosphate starvation response

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Journal of Integrative Plant Biology 2021年第8期63卷 1555-1567页

作者： Rigui Ye Yunrong Wu Zhenyu Gao Hao Chen Lixia Jia Dongming Li Xugang Li Qian Qian Yanhua Qi State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou310058 China Key Laboratory of Herbage&Endemic Crop Biology of Ministry of Education Inner Mongolia Key Laboratory of Herbage&Endemic Crop BiotechnologySchool of Life SciencesInner Mongolia UniversityHohhot010000 China State Key Laboratory of Rice Biology China National Rice Research InstituteChinese Academy of Agricultural SciencesHangzhou310006 China State Key Laboratory of Crop Biology College of Life SciencesShandongAgricultural UniversityTai'an271018 China Sino-German Joint Research Center on Agricultural Biology College of Life SciencesShandong Agricultural UniversityTai'an271018 China

Among the five members of AUX1/LAX genes coding for auxin carriers in rice,only OsAUX1 and OsAUX3 have been *** understand the function of the other AUX1/LAX genes,two independent alleles of osaux4 mutants,osaux4-1 and osaux4-2,were constructed using the CRISPR/Cas9 editing *** osaux4-1 or osaux4-2 exhibited shorter primary root(PR)and longer root hair(RH)compared to the wild-type Dongjin(WT/DJ),and lost response to indoleacetic acid(IAA)***4 is intensively expressed in roots and localized on the plasma membrane,suggesting that OsAUX4 might function in the regulation of root *** decreased meristem cell division activity and the downregulated expression of cell cycle genes in root apices of osaux4 mutants supported the hypothesis that OsAUX4 positively regulates PR ***4 is expressed in RH,and osaux4 mutants showing longer RH compared to WT/DJ implies that OsAUX4 negatively regulates RH ***,osaux4 mutants are insensitive to Pi starvation(-Pi)and OsAUX4 effects on the-Pi response is associated with altered expression levels of Pi starvation-regulated genes,and auxin distribution/*** study revealed that OsAUX4 not only regulates PR and RH development but also plays a regulatory role in crosstalk between auxin and-Pi signaling.

关键词： OsAUX4 phosphate starvation primary root root hair development rice

Putative functions of EpsK in teichuronic acid synthesis and phosphate starvation in Bacillus licheniformis

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Synthetic and Systems Biotechnology 2022年第2期7卷 815-823页

作者： Yiyuan Xu Lijie Yang Haiyan Wang Xiaoyu Wei Yanyan Shi Dafeng Liang Mingfeng Cao Ning He Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005PR China The Key Lab for Synthetic Biotechnology of Xiamen City Xiamen UniversityXiamen361005PR China Institute of Bioengineering Guangdong Academy of SciencesGuangzhou510316GuangdongPR China

Extracellular polymeric substances(EPSs)are extracellular macromolecules in bacteria,which function in cell growth and show potential for mechanism study and biosynthesis ***,the biosynthesis mechanism of EPS is still not *** herein chose Bacillus licheniformis CGMCC 2876 as a target strain to investigate the EPS ***,a member of eps cluster,the predicted polysaccharide synthesis cluster,was overexpressed and showed that the overexpression of epsK led to a 26.54%decrease in the production of EPS and resulted in slenderer cell *** analysis combined with protein-protein interactions analysis and protein modeling revealed that epsK was likely responsible for the synthesis of teichuronic acid,a substitute cell wall component of teichoic acid when the strain was suffering phosphate *** cell cultivation showed that either phosphate limitation or the overexpression of teichuronic acid synthesis genes,tuaB and tuaE could similarly lead to EPS *** enhanced production of teichuronic acid induced by epsK overexpression triggered the endogenous phosphate starvation,resulting in the decreased EPS synthesis and biomass,and the enhanced bacterial *** study presents an insight into the mechanism of EPS synthesis and offers the potential in controllable synthesis of target products.

关键词： Extracellular polymeric substance(EPS) Polysaccharides Transcriptome phosphate starvation

Influences of external nutrient conditions on the transcript levels of a nitrate transporter gene in Skeletonema costatum

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Acta Oceanologica Sinica 2013年第6期32卷 82-88页

作者： LIU Yun SONG Xiuxian HAN Xiaotian YU Zhiming Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences

To verify the feasibility of high-affinity nitrate transporter gene （Nrt2） as an indicator of nitrogen status, changes in the transcript levels of transcripts associated with phosphate starvation and different nitrate concentrations were studied using real-time quantitative reverse-transcription PCR （QRT-PCR） technology in batch cultures of Skeletonema costatum. The results show that compared with P-replete condition, P starvation could reduce the Nrt2 transcript levels apparently. Nrt2 transcript levels had a significant negative linear correlation with nitrate concentrations below 40 pmol/L. The results of 48 h short-term incubation experiment under different nitrate concentrations confirmed this correlation, and the following regression equation is built： y = -3.305x ＋ 98.95, R2 = 0.988, where x represents nitrate concentrations （〈40 btmol/L） and y represents the Nrt2 transcript levels.

关键词： high-affinity nitrate transporter gene phosphate starvation nitrate concentrations real-time PCR Skeletonema costatum

Arsenite provides a selective signal that coordinates arsenate uptake and detoxification through the regulation of PHR1 stability in Arabidopsis

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Molecular Plant 2021年第9期14卷 1489-1507页

作者： Cristina Navarro Cristian Mateo-Elizalde Thotegowdanapalya C.Mohan Eduardo Sanchez-Bermejo Oscar Urrutia Maria Nieves Fernandez-Muniz Jose M.Garcia-Mina Riansares Munoz Javier Paz-Ares Gabriel Castrillo Antonio Leyva Department of Plant Molecular Genetics Centro Nacional de Biotecnología-Consejo Superior de Investigaciones CientíficasMadrid 28049Spain Department of Environmental Biology Sciences SchoolUniversity of NavarraPamplona 31008Spain Department of Analytical Chemistry School of Chemical SciencesUniversidad Complutense de MadridMadrid 28040Spain Present address:Department of Biotechnology and Bioinformatics Faculty of Life SciencesJSS Academy of Higher Education and ResearchMysuruKarnataka 570015India Present address:S&A Fresh Produce.Brook Farm MardenHereford HR13ETUK Future Food Beacon of Excellence&School of Biosciences University of NottinghamNottingham LE125RDUK

In nature,plants acquire nutrients from soils to sustain growth,and at the same time,they need to avoid the uptake of toxic compounds and/or possess tolerance systems to cope with *** is particularly challenging when the toxic compound and the nutrient are chemically similar,as in the case of phosphate and *** this study,we demonstrated that regulatory elements of the phosphate starvation response(PSR)coordinate the arsenate detoxification machinery in the *** showed that arsenate repression of the phosphate transporter PHT1;1 is associated with the degradation of the PSR master regulator *** arsenic is sequestered into the vacuole,PHR1 stability is restored and PHT1;1 expression is ***,we identified an arsenite responsive SKP1-like protein and a PHR1 interactor F-box(PHIF1)as constituents of the SCF complex responsible for PHR1 *** found that arsenite,the form to which arsenate is reduced for compartmentalization in vacuoles,represses PHT1;1 expression,providing a highly selective signal versus phosphate to control PHT1;1 expression in response to ***,our results provide molecular insights into a sensing mechanism that regulates arsenate/phosphate uptake depending on the plant’s detoxification capacity.

关键词： arsenic signaling F-box protein arsenate uptake arsenic detoxification phosphate starvation phytoremediation

Cloning of four putative purple acid phosphatase genes from Zea mays

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Cloning of four putative purple acid phosphatase genes from ...