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Increasing root-lower characteristics improves drought tolerance in cotton cultivars at the seedling stage

Journal of Integrative Agriculture 2024年第7期23卷 2242-2254页

作者： Congcong Guo Hongchun Sun Xiaoyuan Bao Lingxiao Zhu Yongjiang Zhang Ke Zhang Anchang Li Zhiying Bai Liantao Liu Cundong Li State key laboratory of North China crop Improvement and regulation/key laboratory of crop Growth regulation of Hebei Province/College of Agronomy Hebei Agricultural UniversityBaoding 071001China

Drought is an important abiotic stress factor in cotton *** root system architecture(RSA)of cotton shows high plasticity which can alleviate drought-related stress under drought stress(DS)conditions;however,this alleviation is cultivar ***,this study estimated the genetic variability of RSA in cotton under *** the paper-based growth system,we assessed the RSA variability in 80 cotton cultivars at the seedling stage,with 0 and10%polyethylene glycol 6000(PEG6000)as the control(CK)and DS treatment,*** analysis of 23 aboveground and root traits in the 80 cotton cultivars revealed different responses to *** the 10th day after DS treatment,the degree of variation in the RSA traits under DS(5–55%)was greater than that of CK(5–49%).The 80 cultivars were divided into drought-tolerant cultivars(group 1),intermediate drought-tolerant cultivars(group 2),and drought-sensitive cultivars(group 3)based on their comprehensive evaluation values of drought *** DS,the root lengthlower,root area-lower,root volume-lower,and root length density-lower were significantly reduced by 63,71,76,and 4%in the drought-sensitive cultivars compared to ***,the drought-tolerant cultivars maintained their root lengthlower,root area-lower,root volume-lower,and root length density–lower *** to CK,the root diameter(0–2 mm)-lower increased by 21%in group 1 but decreased by 3 and 64%in groups 2 and 3,respectively,under ***,the drought-tolerant cultivars displayed a plastic response under DS that was characterized by an increase in the root-lower *** resistance was positively correlated with the root area-lower and root length ***,the RSA of the different cotton cultivars varied greatly under ***,important root traits,such as the root-lower traits,provide great insights for exploring whether drought-tolerant cotton cultivars can effectively withstand adverse environment

关键词： cotton root system architecture drought stress cultivars variability root-lower

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Overexpression of the peroxidase gene ZmPRX1 increases maize seedling drought tolerance by promoting root development and lignification

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The crop Journal 2024年第3期12卷 753-765页

作者： Xiuzhen Zhai Xiaocui Yan Tinashe Zenda Nan Wang Anyi Dong Qian Yang Yuan Zhong Yue Xing Huijun Duan State key laboratory of North China crop Improvement and regulation key laboratory of crop Germplasm Resources in North China Ministry of EducationCollege of AgronomyHebei Agricultural UniversityBaoding 071001HebeiChina

Drought is a main abiotic stress factor hindering plant growth,development,and crop ***,it is crucial to understand the mechanisms by which plants cope with drought ***,the function of the maize peroxidase gene ZmPRX1 in drought stress tolerance was investigated by measurement of its expression in response to drought treatment both in a ZmPRX1 overexpression line and a mutant *** higher root lignin accumulation and seedling survival rate of the overexpression line than that of the wild type or mutant support a role for ZmPRX1 in maize drought tolerance by regulating root development and ***,yeast one-hybrid,Dule luciferase and ChIP-qPCR assays showed that ZmPRX1 is negatively regulated by a nuclear-localized ZmWRKY86 transcription *** gene could potentially be used for breeding of drought-tolerant cultivars.

关键词： Drought tolerance Maize ZmPRX1 Root development Lignin biosynthesis

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Wheat kinase TaSnRK2.4 forms a functional module with phosphatase TaPP2C01 and transcription factor TaABF2 to regulate drought response

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The crop Journal 2024年第2期12卷 384-400页

作者： Yanyang Zhang Xiaoyang Hou Tianjiao Li Ziyi Wang Jiaqi Zhang Chunlin Zhang Xianchang Liu Xinxin Shi Wanrong Duan Kai Xiao State key laboratory of North China crop Improvement and regulation Baoding 071001HebeiChina College of Agronomy Hebei Agricultural UniversityBaoding 071001HebeiChina

SNF1-related protein kinase 2(SnRK2)family members are essential components of the plant abscisic acid(ABA)signaling pathway initiated by osmotic stress and triggering a drought stress *** study characterized the molecular properties of TaSnRK2.4 and its function in mediating adaptation to drought in Triticum *** of TaSnRK2.4 were upregulated upon drought and ABA signaling and associated with drought-and ABA-responsive cis-elements ABRE and DRE,and MYB and MYC binding sites in the promoter as indicated by reporter GUS protein staining and activity driven by truncations of the *** two-hybrid,BiFC,and Co-IP assays indicated that TaSnRK2.4 protein interacts with TaPP2C01 and an ABF transcription factor(TF)*** results suggested that TaSnRK2.4 forms a functional TaPP2C01-TaSnRK2.4-TaABF2 module with its upstream and downstream *** analysis revealed that TaSnRK2.4 and TaABF2 positively regulate drought tolerance whereas TaPP2C01 acts negatively by modulating stomatal movement,osmotic adjustment,reactive oxygen species(ROS)homeostasis,and root *** analysis,yeast one-hybrid,and transcriptional activation assays indicated that several osmotic stress-responsive genes,including TaSLAC1-4,TaP5CS3,TaSOD5,TaCAT1,and TaPIN4,are regulated by *** analysis verified their functions in positively regulating stomatal movement(TaSLAC1-4),proline accumulation(TaP5CS3),SOD activity(TaSOD5),CAT activity(TaCAT1),and root morphology(TaPIN4).There were high correlations between plant biomass and yield with module transcripts in a wheat variety panel cultivated under drought conditions in the *** findings provide insights into understanding plant drought response underlying the SnRK2 signaling pathway in common wheat.

关键词： Triticum aestivum SnRK2.4 kinase Gene expression Protein interaction Transgene analysis Transcriptional activation

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TaMYB72 directly activates the expression of TaFT to promote heading and enhance grain yield traits in wheat(Triticum aestivum L.)

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Journal of Integrative Plant Biology 2024年第7期66卷 1266-1269页

作者： Lifen Wu Zhencheng Xie Danping Li Yaoyu Chen Chuan Xia Xiuying Kong Xu Liu Lichao Zhang State key laboratory of crop Gene Resources and Breeding Institute of Crop Sciencesthe Chinese Academy of Agricultural SciencesBeijing 100081China State key laboratory of North China crop Improvement and regulation Hebei Sub‐Center for National Maize Improvement CenterCollege of AgronomyHebei Agricultural UniversityBaoding 071001China

Wheat(Triticum aestivum L.)is a staple food for approximately half the global *** the population continues to grow,the demand for high-yielding varieties is increasing(Zorb et al.,2018).Higher yields can be achieved by increasing the number and weight of grains produced and by optimizing heading dates to maximize production in local environments(Sakuma and Schnurbusch,2020).

关键词： heading Wheat yielding

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Synergistic effects of carbon cycle metabolism and photosynthesis in Chinese cabbage under salt stress

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Horticultural Plant Journal 2024年第2期10卷 461-472页

作者： Hao Liang Qiling Shi Xing Li Peipei Gao Daling Feng Xiaomeng Zhang Yin Lu Jingsen Yan Shuxing Shen Jianjun Zhao Wei Ma State key laboratory of North China crop Improvement and regulation Key Laboratory of Vegetable Germplasm Innovation and Utilization of HebeiCollaborative Innovation Center of Vegetable Industry in HebeiCollege of HorticultureHebei Agricultural UniversityBaodingHebei 071000China

Chinese cabbage(Brassica rapa ssp. pekinensis) has a long cultivation history and is one of the vegetable crops with the largest cultivation area in China. However, salt stress severely damages photosynthesis and hormone metabolism, nutritional balances, and results in ion toxicity in plants. To better understand the mechanisms of salt-induced growth inhibition in Chinese cabbage, RNA-seq and physiological index determination were conducted to explore the impacts of salt stress on carbon cycle metabolism and photosynthesis in Chinese cabbage. Here, we found that the number of thylakoids and grana lamellae and the content of starch granules and chlorophyll in the leaves of Chinese cabbage under salt stress showed a time-dependent response, first increasing and then decreasing. Chinese cabbage increased the transcript levels of genes related to the photosynthetic apparatus and carbon metabolism under salt stress, probably in an attempt to alleviate damage to the photosynthetic system and enhance CO_(2) fixation and energy metabolism. The transcription of genes related to starch and sucrose synthesis and degradation were also enhanced;this might have been an attempt to maintain intracellular osmotic pressure by increasing soluble sugar concentrations. Soluble sugars could also be used as potential reactive oxygen species(ROS) scavengers, in concert with peroxidase(POD)enzymes, to eliminate ROS that accumulate during metabolic processes. Our study characterizes the synergistic response network of carbon metabolism and photosynthesis under salt stress.

关键词： Chinese cabbage Salt stress Carbon metabolism Photosynthesis Chloroplast

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Molecular mechanism of flowering time regulation in Brassica rapa:similarities and differences with Arabidopsis

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Horticultural Plant Journal 2024年第3期10卷 615-628页

作者： Na Li Rui Yang Shuxing Shen Jianjun Zhao State key laboratory of North China crop Improvement and regulation Key Laboratory of Vegetable Germplasm Innovation and Utilization of HebeiCollaborative Innovation Center of Vegetable Industry in HebeiCollege of HorticultureHebei Agricultural UniversityBaodingHebei 071000China

Properly regulated flowering time is pivotal for successful plant *** floral transition from vegetative growth to reproductive growth is regulated by a complex gene regulatory network that integrates environmental signals and internal conditions to ensure that flowering takes place under favorable *** rapa is a diploid Cruciferae species that includes several varieties that are cultivated as vegetable or oil *** time is one of the most important agricultural traits of *** crops because of its influence on yield and *** transition to flowering in *** is regulated by several environmental and developmental cues,which are perceived by several signaling pathways,including the vernalization pathway,the autonomous pathway,the circadian clock,the thermosensory pathway,and gibberellin(GA)*** signals are integrated to control the expression of floral integrators BrFTs and BrSOC1s to regulate *** this review,we summarized current research advances on the molecular mechanisms that govern flowering time regulation in *** and compare this to what is known in Arabidopsis.

关键词： Flowering time Brassica rapa Vernalization Photoperiod

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Temporal control of the Aux/IAA genes BnIAA32 and BnIAA34 mediates Brassica napus dual shade responses

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Journal of Integrative Plant Biology 2024年第5期66卷 928-942页

作者： Yafei Li Yiyi Guo Yue Cao Pengguo Xia Dongqing Xu Ning Sun Lixi Jiang Jie Dong Institute of crop Science College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China key laboratory of Plant Secondary Metabolism and regulation of Zhejiang Province College of Life Sciences and MedicineZhejiang Sci-TechUniversityHangzhou310018China State key laboratory of crop Genetics and Germplasm Enhancement College of AgricultureNanjing Agricultural UniversityNanjing 210095China key laboratory of Growth regulation and Transformation Research of Zhejiang Province School of Life SciencesWestlake UniversityHangzhou 310024China

Precise responses to changes in light quality are crucial for plant growth and *** example,hypocotyls of shade-avoiding plants typically elongate under shade *** this typical shade-avoidance response(TSR)has been studied in Arabidopsis(Arabidopsis thaliana),the molecular mechanisms underlying shade tolerance are poorly *** we report that ***(Brassica napus)seedlings exhibit dual shade *** addition to the TSR,*** seedlings also display an atypical shade response(ASR),with shorter hypocotyls upon perception of early-shade ***-wide selective sweep analysis indicated that ASR is associated with light and auxin ***,genetic studies demonstrated that phytochrome A(BnphyA)promotes ASR,whereas BnphyB inhibits *** ASR,YUCCA8 expression is activated by early-shade cues,leading to increased auxin *** inhibits hypocotyl elongation,as young *** seedlings are highly sensitive to ***,two non-canonical AUXIN/INDOLE-3-ACETIC ACID(Aux/IAA)repressor genes,BnIAA32 and BnIAA34,are expressed during this early ***32 and BnIAA34 inhibit hypocotyl elongation under shade conditions,and mutations in BnIAA32 and BnIAA34 suppress ***,our study demonstrates that the temporal expression of BnIAA32 and BnIAA34 determines the behavior of *** seedlings following shade-induced auxin biosynthesis.

关键词： Brassica napus high-density planting IAA32/34 light signal transduction shade response temporal gene expression

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A k-mer-based pangenome approach for cataloging seed-storage-protein genes in wheat to facilitate genotype-to-phenotype prediction and improvement of end-use quality

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Molecular Plant 2024年第7期17卷 1038-1053页

作者： Zhaoheng Zhang Dan Liu Binyong Li Wenxi Wang Jize Zhang Mingming Xin Zhaorong Hu Jie Liu Jinkun Du Huiru Peng Chenyang Hao Xueyong Zhang Zhongfu Ni Qixin Sun Weilong Guo Yingyin Yao Frontiers Science Center for Molecular Design Breeding Key Laboratory of Crop Heterosis and Utilization(MOE)and Bejing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing100193China key laboratory of crop Gene Resources and Breeding Institute of Crop ScienceChinese Academy of Agricultural SciencesBejingChina

Wheat is a staple foodfor more than 35%of the world's population,with wheatflourused to make hundreds of baked *** end-use quality is a major breeding target;however,improving it is especially time-consuming and ***,genes encoding seed-storage proteins(ssPs)form multigene families and are repetitive,with gaps commonplace in several genome *** overcome these barriers and efficiently identify superior wheat SSP alleles,we developed"PanSK"(Pan-SSP k-mer)for genotype-to-phenotype prediction based on an SsP-based pangenome *** uses 29-mer sequences that represent each ssP gene at the pangenomic level to reveal untapped diversity across landraces and modern ***-wide association studies with k-mers identified 23 Ssp genes associated with end-use quality that represent novel targets for *** evaluated the effect of rye secalin genes on end-use quality and found that removal of w-secalins from 1BL/1RS wheat translocation lines is associated with enhanced end-use ***,using machine-learning-based prediction inspired by PanSK,we predicted the quality phenotypes with high accuracy from genotypes *** study provides an effective approach for genome design based on ssP genes,enabling the breeding of wheat varieties with superior processing capabilities and improved end-use quality.

关键词： wheat seed-storage protein end-use quality k-mer pangenome genomic prediction

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Enemies atpeace:Recentprogressin Agrobacterium-mediated cereal transformation

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The crop Journal 2024年第2期12卷 321-329页

作者： Shaoshuai Liu Ke Wang Shuaifeng Geng Moammar Hossain Xingguo Ye Aili Li Long Mao Karl-Heinz Kogel State key laboratory of crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Institute of Phytopathology Centre for BioSystemsLand Use and NutritionJustus Liebig UniversityHeinrich Buff-Ring 26-32D-35392GiessenGermany

Agrobacterium tumefaciens mediated plant transformation is a versatile tool for plant genetic engineering following its discovery nearly half a century *** modifications were made in its application to increase efficiency,especially in the recalcitrant major cereals *** breakthroughs in transformation efficiency continue its role as a mainstream technique in CRISPR/Cas-based genome editing and gene *** modifications led to higher transformation frequency and lower but more stable transgene copies with the capability to revolutionize modern *** this review,we provide a brief overview of the history of Agrobacterium-mediated plant transformation and focus on the most recent progress to improve the system in both the Agrobacterium and the host recipient.A promising future for transformation in biotechnology and agriculture is predicted.

关键词： Agrobacterium tumefaciens Cereal species Genome editing Genetic engineering Plant breeding

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Spatiotemporal characteristics and driving mechanisms of land use/land cover(LULC)changes in the Jinghe River Basin,China

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Journal of Arid Land 2024年第1期16卷 91-109页

作者： WANG Yinping JIANG Rengui YANG Mingxiang XIE Jiancang ZHAO Yong LI Fawen LU Xixi State key laboratory of Eco-hydraulics in Northwest Arid Region of China Xi'an University of TechnologyXi'an 710048China State key laboratory of Simulation and regulation of water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China State key laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Department of Geography National University of SingaporeSingapore 117570Singapore

Understanding the trajectories and driving mechanisms behind land use/land cover(LULC)changes is essential for effective watershed planning and *** study quantified the net change,exchange,total change,and transfer rate of LULC in the Jinghe River Basin(JRB),China using LULC data from 2000 to *** trajectory analysis,knowledge maps,chord diagrams,and standard deviation ellipse method,we examined the spatiotemporal characteristics of LULC *** further established an index system encompassing natural factors(digital elevation model(DEM),slope,aspect,and curvature),socio-economic factors(gross domestic product(GDP)and population),and accessibility factors(distance from railways,distance from highways,distance from water,and distance from residents)to investigate the driving mechanisms of LULC changes using factor detector and interaction detector in the geographical detector(Geodetector).The key findings indicate that from 2000 to 2020,the JRB experienced significant LULC changes,particularly for farmland,forest,and *** the study period,LULC change trajectories were categorized into stable,early-stage,late-stage,repeated,and continuous change *** the stable change type,the late-stage change type predominated the LULC change trajectories,comprising 83.31% of the total change *** period 2010-2020 witnessed more active LULC changes compared to the period *** LULC changes exhibited a discrete spatial expansion trend during 2000-2020,predominantly extending from southeast to northwest of the *** driving factors on LULC changes included slope,GDP,and distance from *** interaction detection results imply either bilinear or nonlinear enhancement for any two driving factors impacting the LULC changes from 2000 to *** comprehensive understanding of the spatiotemporal characteristics and driving mechanisms of LULC changes offers valuable insights for the planning and sustainable management

关键词： land use/land cover(LULC)changes driving mechanisms trajectory analysis geographical detector(Geodetector) Grain for Green Project Jinghe River Basin

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