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Endomembrane-biased dimerization of ABCG16 and ABCG25 transporters determines their substrate selectivity in ABA-regulated plant growth and stress responses

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Molecular Plant 2024年第3期17卷 478-495页

作者： Yeling Zhou Yuzhu Wang Dong Zhang Jiansheng Liang institute of Plant and Food Science Department of BiologySchool of Life SciencesSouthern University of Science and Technology(SUSTech)Shenzhen 518055China Key laboratory of Molecular Design for Plant Cell Factory of Guangdong higher education.Institutes Southern University of Science and Technology(SUSTech)Shenzhen 518055China jiangsu Key laboratory of Crop genetics and Physiology/Co-lnnovation Center for Modern Production Technology of Grain Crops Key Laboratory of Plant Functional Genomics of the Ministry of EducationYangzhou UniversityYangzhou 225009China

ATP-binding cassette(ABC)transporters are integral membrane proteins that have evolved diverse func-tions fulfilled via the transport of various *** Arabidopsis,the G subfamily of ABC proteins is particularly abundant and participates in multiple signaling pathways during plant development and stress *** this study,we revealed that two Arabidopsis ABCG transporters,ABCG16 and ABCG25,engage in ABA-mediated stress responses and early plant growth through endomembrane-specific dimerization-coupled transport of ABA and ABA-glucosyl ester(ABA-GE),*** first revealed that ABCG16 contributes to osmotic stress tolerance via ABA *** specifically,ABCG16 induces cellular ABA efflux in both yeast and plant *** FRET analysis,we showed that ABCG16 forms oblig-atory homodimers for ABA export activity and that the plasma membrane-resident ABCG16 homodimers specifically respond to ABA,undergoing notable conformational ***,we demonstrated that ABCG16 heterodimerizes with ABCG25 at the endoplasmic reticulum(ER)membrane and facilitates the ER entry of ABA-GE in both Arabidopsis and tobacco *** specific responsiveness of the ABCG16-ABCG25 heterodimer to ABA-GE and the superior growth of their double mutant support an inhib-itory role of these twoABCGs in early seedling establishment via regulation of ABA-GE translocation across the ER *** endomembrane-specific analysis of the FRET signals derived from the homo-or heterodimerized ABcG complexes allowed us to link endomembrane-biased dimerization to the transloca-tion of distinct substrates by ABcG transporters,providing a prototypic framework for understanding the omnipotence of ABcG transporters in plant development and stress responses.

关键词： abscisic acid ABCG transporter dimerization endomembrane substrate selectivity

Two ABCI family transporters,OsABCI15 and OsABCI16,are involved in grain-filling in rice

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Journal of genetics and Genomics 2024年第5期51卷 492-506页

作者： Bin Ma Xiubiao Cao Xiaoyuan Li Zhong Bian Qi-Qi Zhang Zijun Fang Jiyun Liu Qun Li Qiaoquan Liu Lin Zhang Zuhua He Jiangsu Key laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding laboratory/Key laboratory of Plant Functional Genomics of the ministry of education.Jiangsu Key laboratory of Crop genetics and Physiology Agricultural College of Yangzhou UniversityYangzhouJiangsu 225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhouJiangsu 225009China National Key laboratory of Plant Molecular genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology&EcologyChinese Academy of SciencesShanghai 200032China Institute of Biotechnology Hangzhou Academy of Agricultural SciencesHangzhouZhejiang 310024China Joint International Research laboratory of Agriculture and Agri-Product Safety of the ministry of education Yangzhou UniversityYangzhouJiangsu 225009China

Seed development is critical for plant reproduction and crop yield,with panicle seed-setting rate,grain-filling,and grain weight being key seed characteristics for yield ***,few genes are known to regulate grain ***,we identify two adenosine triphosphate(ATP)-binding cassette(ABC)I-type transporter genes,OsABCI15 and OsABCI16,involved in rice *** genes are highly expressed in developing seeds,and their proteins are localized to the plasma membrane and ***,knockout of OsABCI15 and OsABCI16 results in a significant reduction in seed-setting rate,caused predominantly by the severe empty pericarp phenotype,which differs from the previously reported low seed-setting phenotype resulting from failed *** analysis indicates that OsABCI15 and OsABCI16 participate in ion homeostasis and likely export ions between filial tissues and maternal tissues during grain ***,overexpression of OsABCI15 and OsABCI16 enhances the seed-setting rate and grain yield in transgenic plants and decreases ion accumulation in brown ***,the OsABCI15/16 orthologues in maize exhibit a similar role in kernel development,as demonstrated by their disruption in transgenic ***,ourﬁndings reveal the important roles of two ABC transporters in cereal grain filling,highlighting their value in crop yield improvement.

关键词： ABC transporters Rice Grain filling Ion homeostasis Grain yield

CmMYB3-like negatively regulates anthocyanin biosynthesis and flower color formation during the post-flowering stage in Chrysanthemum morifolium

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Horticultural Plant Journal 2024年第1期10卷 194-204页

作者： Lijie Zhou Shenhui Liu Yiguang Wang Yuxi Wang Aiping Song Jiafu Jiang Sumei Chen Zhiyong Guan Fadi Chen State Key laboratory of Crop genetics and Germplasm Enhancement The Key Laboratory of LandscapingMinistry of Agriculture and Rural AffairsCollege of HorticultureNanjing Agricultural UniversityNanjingJiangsu 210095China

Color fading caused by a decrease in anthocyanin accumulation during the post-flowering stage significantly affects postharvest quality of ***,the underlying mechanism by which anthocyanin accumulation decreases during the post-flowering stage still unclear,which greatly restricts design of molecular breeding in ***,a chrysanthemum SG7 R2R3 MYB transcription factor(TF),CmMYB3-like,was identified to have a function in regulating anthocyanin biosynthesis during the post-flowering *** real time PCR(qRT-PCR)assays showed that the expression of CmMYB3-like was gradually downregulated when anthocyanin content increased during the flowering stage and was significantly upregulated during the post-flowering *** transformation of chrysanthemum and dual-luciferase assays in *** leaves showed that CmMYB3-like suppressed anthocyanin accumulation by inhibiting the transcription of CmCHS and CmANS directly and that of CmF3H ***,overexpression or suppression of CmMYB3-like did not affect the biosynthesis of flavones or *** transformation of chrysanthemum revealed that the overexpression of CmMYB3-like inhibited anthocyanin accumulation,but its suppression prevented the decrease in anthocyanin accumulation during the post-flowering *** results revealed a crucial role of CmMYB3-like in regulating the color of petals during the post-flowering stage and provided a target gene for molecular design breeding to improve the postharvest quality of chrysanthemum.

关键词： Post-flowering stage Color fading Anthocyanins CmMYB3-like Chrysanthemum Molecular breeding

Dynamics and genetic regulation of macronutrient concentrations during grain development in maize

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Journal of Integrative Agriculture 2024年第3期23卷 781-794页

作者： Pengcheng Li Shuangyi Yin Yunyun Wang Tianze Zhu Xinjie Zhu Minggang Ji Wenye Rui Houmiao Wang Chenwu Xu Zefeng Yang Jiangsu Key laboratory of Crop genetics and Physiology/Key laboratory of Plant Functional Genomics Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Agricultural CollegeYangzhou UniversityYangzhou 225009China Jiangsu Co-lnnovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China

Nitrogen(N), phosphorus(P), and potassium(K) are essential macronutrients that are crucial not only for maize growth and development, but also for crop yield and quality. The genetic basis of macronutrient dynamics and accumulation during grain filling in maize remains largely unknown. In this study, we evaluated grain N, P, and K concentrations in 206 recombinant inbred lines generated from a cross of DH1M and T877 at six time points after pollination. We then calculated conditional phenotypic values at different time intervals to explore the dynamic characteristics of the N, P, and K concentrations. Abundant phenotypic variations were observed in the concentrations and net changes of these nutrients. Unconditional quantitative trait locus(QTL) mapping revealed 41 non-redundant QTLs, including 17, 16, and 14 for the N, P, and K concentrations, respectively. Conditional QTL mapping uncovered 39 non-redundant QTLs related to net changes in the N, P, and K concentrations. By combining QTL, gene expression, co-expression analysis, and comparative genomic data, we identified 44, 36, and 44 candidate genes for the N, P, and K concentrations, respectively, including GRMZM2G371058 encoding a Doftype zinc finger DNA-binding family protein, which was associated with the N concentration, and GRMZM2G113967encoding a CBL-interacting protein kinase, which was related to the K concentration. The results deepen our understanding of the genetic factors controlling N, P, and K accumulation during maize grain development and provide valuable genes for the genetic improvement of nutrient concentrations in maize.

关键词： maize nutrient concentration unconditional QTL mapping conditional QTL mapping dynamic trait

Integrating machine learning and genome editing for crop improvement

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aBIOTECH 2024年第2期5卷 262-277页

作者： Long Chen Guanqing Liu Tao Zhang Jiangsu Key laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding laboratory/Key laboratory of Plant Functional Genomics of the ministry of education Agricultural College of Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Jiangsu Key laboratory of Crop genetics and Physiology Yangzhou UniversityYangzhou 225009China

Genome editing is a promising technique that has been broadly utilized for basic gene function studies and trait ***,the exponential growth of computational power and big data now promote the application of machine learning for biological *** this regard,machine learning shows great potential in the refinement of genome editing systems and crop ***,we review the advances of machine learning to genome editing optimization,with emphasis placed on editing efficiency and specificity ***,we demonstrate how machine learning bridges genome editing and crop breeding,by accurate key site detection and guide RNA ***,we discuss the current challenges and prospects of these two techniques in crop *** integrating advanced genome editing techniques with machine learning,progress in crop breeding will be further accelerated in the future.

关键词： Machine learning Genome editing Crop improvement Molecular design breeding

Suppressing a mitochondrial calcium uniporter activates the calcium signaling pathway and promotes cell elongation in cotton

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The Crop Journal 2024年第2期12卷 411-421页

作者： Yujia Duan Xiaoguang Shang Ruiping Tian Weixi Li Xiaohui Song Dayong Zhang Wangzhen Guo State Key laboratory of Crop genetics&Germplasm Enhancement and Utilization Nanjing Agricultural UniversityNanjing 210095JiangsuChina Engineering Research Center of ministry of education.for Cotton Germplasm Enhancement and Application Nanjing Agricultural UniversityNanjing 210095JiangsuChina

Mitochondrial calcium uniporter(MCU)is a conserved calcium ion(Ca^(2+))transporter in the mitochondrial inner membrane of eukaryotic *** MCU proteins regulate Ca^(2+)flow and modulate plant cell development remain largely ***,we identified the gene GhMCU4 encoding a MCU protein that negatively regulates plant development and fiber elongation in cotton(Gossypium hirsutum).GhMCU4expressed constitutively in various tissues with the higher transcripts in elongating fiber *** of GhMCU4 in cotton significantly elevated the plant height and root *** calcium signaling pathway was significantly activated and calcium sensor genes,including Ca^(2+)dependent modulator of interactor of constitutively active ROP(GhCMI1),calmodulin like protein(GhCML46),calciumdependent protein kinases(GhCPKs),calcineurin B-like protein(GhCBLs),and CBL-interacting protein kinases(GhCIPKs),were dramatically upregulated in GhMCU4-silenced *** processes were preferentially enriched,and genes related to regulation of transcription were upregulated in GhMCU4-silenced *** contents of Ca^(2+)and H_(2)O_(2)were significantly increased in roots and leaves of GhMCU4-silenced *** length and Ca^(2+)and H_(2)O_(2)contents in fibers were significantly increased in GhMCU4-silenced *** study indicated that GhMCU4 plays a negative role in regulating cell elongation in cotton,thus expanding understanding in the role of MCU proteins in plant growth and development.

关键词： Calcium signaling Hydrogen peroxide Metabolic processed Gossypium hirsutum

The anthocyanin formation of purple leaf is associated with the activation of LfiHY5 and LfiMYB75 in crape myrtle

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Horticultural Plant Journal 2024年第5期10卷 1230-1246页

作者： Lu Feng Ping Shen Xiufeng Chi Yang Zhou Jieru Liu Tangren Cheng Jia Wang Qixiang Zhang Ming Cai Huitang Pan State Key laboratory of Efficient Production of Forest Resources Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular BreedingNational Engineering Research Center for FloricultureBeijing Laboratory of Urban and Rural Ecological EnvironmentKey Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education and College of Landscape ArchitectureBeijing Forestry UniversityBeijing 100083China

Purple-leafed plants not only have a higher resistance to biotic and abiotic stresses,but also have higher ornamental *** are vital for leaf color formation,growth and development of purple ***,the molecular mechanism underlying purple leaf formation in Lagerstroemia indica remains *** and transcriptomic analysis of purple-leafed cultivar‘Ebony Embers’and greenleafed cultivar‘Arapahoe’showed that the high expression of anthocyanin structure genes induced hyperaccumulation of cyanidin and pelargonidin derivatives,making the leaves ***5,LfiMYB75 and LfibHLH1 were identified using correlation analysis and weighted gene co-expression network ***‘Arapahoe’‘Ebony Embers’population,LfiHY5 and LfiMYB75 showed significant positive correlation with leaf anthocyanin *** expression of LfiMYB75 and LfiHY5 in tobacco and purple-leafed crape myrtle indicated that the two genes activated anthocyanin *** two-hybrid analysis showed that LfiMYB75 and LfibHLH1 could form a complex that enhanced anthocyanin *** monohybrid and dual-luciferase assays confirmed that LfiHY5 activated the expression of LfiMYB75,to activate the transcription of anthocyanin structural genes LfiCHS and ***,there were three alleles of LfiHY5 in crape myrtle,and the different sequences had different activation effects on *** conclusion,the results showed that LfiHY5 led to upregulate the transcription of LfiMYB75,and LfiMYB75 formed a complex with LfibHLH1,which increased the transcription level of LfiCHS and LfiANS to affect anthocyanin synthesis in crape myrtle.

关键词： Lagerstroemia indica Leaf color Anthocyanin HY5 MYB bHLH

Combining QTL Mapping and Multi-Omics Identify Candidate Genes for Nutritional Quality Traits during Grain Filling Stage in Maize

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1441-1453页

作者： Pengcheng Li Tianze Zhu Yunyun Wang Shuangyi Yin Xinjie Zhu Minggang Ji Wenye Rui Houmiao Wang Zefeng Yang Chenwu Xu Jiangsu Key laboratory of Crop genetics and Physiology Key Laboratory of Plant Functional Genomics of the Ministry of EducationJiangsu Key Laboratory of Crop Genomics and Molecular BreedingAgricultural College of Yangzhou UniversityYangzhou225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou225009China

The nutritional composition and overall quality of maize kernels are largely determined by the key chemical com-ponents:protein,oil,and ***,the genetic basis underlying these nutritional quality traits during grainﬁlling remains poorly *** this study,the concentrations of protein,oil,and starch were studied in 204 recombinant inbred lines resulting from a cross between DH1M and T877 at four different stages *** the traits exhibited considerable phenotypic *** the grain-ﬁlling stage,the levels of protein and starch content generally increased,whereas oil content decreased,with signiﬁcant changes observed between 30 and 40 days after *** trait locus(QTL)mapping was conducted and a total of 32 QTLs,comprising 14,12,and 6 QTLs for grain protein,oil,and starch content were detected,*** QTLs were consistently detectable across different time *** integrating QTL analysis,glo-bal gene expression proﬁling,and comparative genomics,we identiﬁed 157,86,and 54 differentially expressed genes harboring nonsynonymous substitutions between the parental lines for grain protein,oil,and starch con-tent,*** gene function annotation prioritized 15 candidate genes potentially involved in reg-ulating grain quality traits,including those encoding transcription factors(NAC,MADS-box,bZIP,and MYB),cell wall invertase,cellulose-synthase-like protein,cell division cycle protein,trehalase,auxin-responsive factor,and phloem protein *** study offers signiﬁcant insights into the genetic architecture of maize kernel nutritional quality and identiﬁes promising QTLs and candidate genes,which are crucial for the genetic enhance-ment of these traits in maize breeding programs.

关键词： Maize protein oil starch QTL mapping candidate genes

Grain Yield,Biomass Accumulation,and Leaf Photosynthetic Characteristics of Rice under Combined Salinity-Drought Stress

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Rice science 2024年第1期31卷 118-128,I0023页

作者： WEI Huanhe GENG Xiaoyu ZHANG Xiang ZHU Wang ZHANG Xubin CHEN Yinglong HUO Zhongyang ZHOU Guisheng MENG Tianyao DAI Qigen Jiangsu Key laboratory of Crop Cultivation and Physiology/Jiangsu Key laboratory of Crop genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Key laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas the Ministry of Agriculture and Rural Affairs of China/Research Institute of Rice Industrial Engineering TechnologyYangzhou UniversityYangzhou 225009China Institute of Agricultural Science and Technology Development/Joint International Research laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009China

Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation ***,combined salinity-drought stress poses a major threat to rice *** this study,two salinity levels(NS,non-salinity;HS,high salinity)along with three drought treatments(CC,control condition;DJ,drought stress imposed at jointing;DH,drought stress imposed at heading)were performed to investigate their combined influences on leaf photosynthetic characteristics,biomass accumulation,and rice yield ***,drought,and their combination led to a shortened growth period from heading to maturity,resulting in a reduced overall growth *** yield was reduced under both salinity and drought stress,with a more substantial reduction under the combined salinity-drought *** combined stress imposed at heading caused greater yield losses in rice compared with the stress imposed at ***,the combined salinity-drought stress induced greater decreases in shoot biomass accumulation from heading to maturity,as well as in shoot biomass and nonstructural carbohydrate(NSC)content in the stem at heading and ***,it increased the harvest index and NSC remobilization *** and drought reduced the leaf area index and SPAD value of flag leaves and weakened the leaf photosynthetic characteristics as indicated by lower photosynthetic rates,transpiration rates,and stomatal *** reductions were more pronounced under the combined ***,drought,and especially their combination,decreased the activities of ascorbate peroxidase,catalase,and superoxide dismutase,while increasing the contents of malondialdehyde,hydrogen peroxide,and superoxide *** results indicated a more significant yield loss in rice when subjected to combined salinity-drought *** individual and combined stresses of salinity and dro

关键词： antioxidant defense system combined salinity-drought stress drought stress photosynthetic characteristics rice salinity stress