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IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-16 DOI: 10.1111/jipb.13524
{"title":"Issue information page","authors":"","doi":"10.1111/jipb.13524","DOIUrl":"https://doi.org/10.1111/jipb.13524","url":null,"abstract":"","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 8","pages":"1533-1536"},"PeriodicalIF":9.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13524","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phylotranscriptomic and ecological analyses reveal the evolution and morphological adaptation of Abies 系统转录组学和生态学分析揭示了松柏的进化和形态适应。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-16 DOI: 10.1111/jipb.13760
Zhou-Rui Wei, Dan Jiao, Christian Anton Wehenkel, Xiao-Xin Wei, Xiao-Quan Wang
{"title":"Phylotranscriptomic and ecological analyses reveal the evolution and morphological adaptation of Abies","authors":"Zhou-Rui Wei,&nbsp;Dan Jiao,&nbsp;Christian Anton Wehenkel,&nbsp;Xiao-Xin Wei,&nbsp;Xiao-Quan Wang","doi":"10.1111/jipb.13760","DOIUrl":"10.1111/jipb.13760","url":null,"abstract":"<div>\u0000 \u0000 <p>Coniferous forests are under severe threat of the rapid anthropogenic climate warming. <i>Abies</i> (firs), the fourth-largest conifer genus, is a keystone component of the boreal and temperate dark-coniferous forests and harbors a remarkably large number of relict taxa. However, the uncertainty of the phylogenetic and biogeographic history of <i>Abies</i> significantly impedes our prediction of future dynamics and efficient conservation of firs. In this study, using 1,533 nuclear genes generated from transcriptome sequencing and a complete sampling of all widely recognized species, we have successfully reconstructed a robust phylogeny of global firs, in which four clades are strongly supported and all intersectional relationships are resolved, although phylogenetic discordance caused mainly by incomplete lineage sorting and hybridization was detected. Molecular dating and ancestral area reconstruction suggest a Northern Hemisphere high-latitude origin of <i>Abies</i> during the Late Cretaceous, but all extant firs diversified during the Miocene to the Pleistocene, and multiple continental and intercontinental dispersals took place in response to the late Neogene climate cooling and orogenic movements. Notably, four critically endangered firs endemic to subtropical mountains of China, including <i>A. beshanzuensis</i>, <i>A. ziyuanensis</i>, <i>A. fanjingshanensis</i> and <i>A. yuanbaoshanensis</i> from east to west, have different origins and evolutionary histories. Moreover, three hotspots of species richness, including western North America, central Japan, and the Hengduan Mountains, were identified in <i>Abies</i>. Elevation and precipitation, particularly precipitation of the coldest quarter, are the most significant environmental factors driving the global distribution pattern of fir species diversity. Some morphological traits are evolutionarily constrained, and those linked to elevational variation (e.g., purple cone) and cold resistance (e.g., pubescent branch and resinous bud) may have contributed to the diversification of global firs. Our study sheds new light on the spatiotemporal evolution of global firs, which will be of great help to forest management and species conservation in a warming world.</p></div>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 12","pages":"2664-2682"},"PeriodicalIF":9.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13760","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141994847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cover Image: 封面图片:
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-16 DOI: 10.1111/jipb.13525
{"title":"Cover Image:","authors":"","doi":"10.1111/jipb.13525","DOIUrl":"https://doi.org/10.1111/jipb.13525","url":null,"abstract":"<p>The Sapindaceae family, also known as the soapberry family, comprises over 140 genera and approximately 1,900 species, including economically important and popular fruit trees like lychee, longan, rambutan, and ackee; timber trees as the maple and buckeye; and other species that are prized for their abundant secondary metabolites, such as saponins from soapberry and seed oil from yellowhorn. The cover features the letters “SAP”, representing the Sapindaceae genome database SapBase, filled in with images of key species within the Sapindaceae. SapBase is an integrative genomic resource and analysis platform for the Sapindaceae family established by Li et al. (pages 1561–1570). SapBase provides a critical foundation for research on the diverse species within the Sapindaceae.</p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 8","pages":"C1"},"PeriodicalIF":9.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13525","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MYB52 negatively regulates ADF9-meditated actin filament bundling in Arabidopsis pavement cell morphogenesis 在拟南芥铺层细胞形态发生过程中,MYB52 负向调节 ADF9 介导的肌动蛋白丝束。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-13 DOI: 10.1111/jipb.13762
Tianqi Qiu, Yuanyuan Su, Nannan Guo, Xinyuan Zhang, Pengfei Jia, Tonglin Mao, Xianling Wang
{"title":"MYB52 negatively regulates ADF9-meditated actin filament bundling in Arabidopsis pavement cell morphogenesis","authors":"Tianqi Qiu,&nbsp;Yuanyuan Su,&nbsp;Nannan Guo,&nbsp;Xinyuan Zhang,&nbsp;Pengfei Jia,&nbsp;Tonglin Mao,&nbsp;Xianling Wang","doi":"10.1111/jipb.13762","DOIUrl":"10.1111/jipb.13762","url":null,"abstract":"<p>It has been proposed that cortical fine actin filaments are needed for the morphogenesis of pavement cells (PCs). However, the precise role and regulation mechanisms of actin filaments in PC morphogenesis are not well understood. Here, we found that <i>Arabidopsis thaliana</i> ACTIN DEPOLYMERIZING FACTOR9 (ADF9) is required for the morphogenesis of PC, which is negatively regulated by the R2R3 MYELOBLASTOSIS (MYB) transcription factor MYB52. In <i>adf9</i> mutants, the lobe number of cotyledon PCs was significantly reduced, while the average lobe length did not differ significantly compared to that of wild type (Col-0), except for the variations in cell area and circularity, whereas the PC shapes in <i>ADF9</i> overexpression seedlings showed different results. ADF9 decorated actin filaments, and colocalized with plasma membrane. The extent of filament bundling and actin filament bundling activity in <i>adf9</i> mutant decreased. In addition, MYB52 directly targeted the promoter of <i>ADF9</i> and negatively regulated its expression. The <i>myb52-2</i> mutant showed increased lobe number and cell area, reduced cell circularity of PCs, and the PC phenotypes were suppressed when ADF9 was knocked out. Taken together, our data demonstrate that actin filaments play an important role in the morphogenesis of PC and reveal a transcriptional mechanism underlying MYB52 regulation of ADF9-mediated actin filament bundling in PC morphogenesis.</p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 11","pages":"2379-2394"},"PeriodicalIF":9.3,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13762","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141970234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Functions and mechanisms of non-histone protein acetylation in plants 植物非组蛋白乙酰化的功能和机制
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-13 DOI: 10.1111/jipb.13756
Xia Jin, Xiaoshuang Li, Jaime A. Teixeira da Silva, Xuncheng Liu
{"title":"Functions and mechanisms of non-histone protein acetylation in plants","authors":"Xia Jin,&nbsp;Xiaoshuang Li,&nbsp;Jaime A. Teixeira da Silva,&nbsp;Xuncheng Liu","doi":"10.1111/jipb.13756","DOIUrl":"10.1111/jipb.13756","url":null,"abstract":"<p>Lysine acetylation, an evolutionarily conserved post-translational protein modification, is reversibly catalyzed by lysine acetyltransferases and lysine deacetylases. Lysine acetylation, which was first discovered on histones, mainly functions to configure the structure of chromatin and regulate gene transcriptional activity. Over the past decade, with advances in high-resolution mass spectrometry, a vast and growing number of non-histone proteins modified by acetylation in various plant species have been identified. Lysine acetylation of non-histone proteins is widely involved in regulating biological processes in plants such as photosynthesis, energy metabolism, hormone signal transduction and stress responses. Moreover, in plants, lysine acetylation plays crucial roles in regulating enzyme activity, protein stability, protein interaction and subcellular localization. This review summarizes recent progress in our understanding of the biological functions and mechanisms of non-histone protein acetylation in plants. Research prospects in this field are also noted.</p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 10","pages":"2087-2101"},"PeriodicalIF":9.3,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13756","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141970233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Natural variations in MdNAC18 exert major genetic effect on apple fruit harvest date by regulating ethylene biosynthesis genes MdNAC18 的自然变异通过调控乙烯生物合成基因对苹果果实的收获期产生了重要的遗传影响。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-08 DOI: 10.1111/jipb.13757
Guo Wen, Bei Wu, Yi Wang, Ting Wu, Zhenhai Han, Xinzhong Zhang
{"title":"Natural variations in MdNAC18 exert major genetic effect on apple fruit harvest date by regulating ethylene biosynthesis genes","authors":"Guo Wen,&nbsp;Bei Wu,&nbsp;Yi Wang,&nbsp;Ting Wu,&nbsp;Zhenhai Han,&nbsp;Xinzhong Zhang","doi":"10.1111/jipb.13757","DOIUrl":"10.1111/jipb.13757","url":null,"abstract":"<div>\u0000 \u0000 <p>Dissecting the genetic control of apple fruit harvest date (AFHD) into multiple Mendelian factors poses a significant challenge in modern genetics. Here, a quantitative trait locus (QTL) for AFHD was fine-mapped to the NAC transcription factor (TF) <i>MdNAC18</i> within the interval defined by the overlap of QTLs Z03.5/Z03.6 and F03.2/F03.3. One direct target of MdNAC18 is the ethylene biosynthesis gene <i>MdACO1</i>. The single nucleotide polymorphisms (SNPs) SNP517 and SNP958 in the <i>MdNAC18</i> coding sequence modulated activation of <i>MdACO1</i> by MdNAC18. SNP1229 in the <i>MdACO1</i> promoter destroyed the MdNAC18 binding site and thus abolished MdNAC18 binding. SNP517 and SNP958 also affected MdNAC18 activation of the TF gene <i>MdARF5</i>; MdARF5 activates the ethylene biosynthesis gene <i>MdACS1</i>. SNP517 and SNP958 in <i>MdNAC18</i>, SNP1229 and SNP769 (linked to InDel62) in <i>MdACO1</i>, and InDel162 in <i>MdACS1</i> constituted a genetic variation network. The genetic effect of this network on AFHD was estimated as 60.3 d, accounting for 52.6% of the phenotype variation of the training population. The joint effects of these polymorphisms increased the accuracy of a genomics-assisted prediction (GAP) model for AFHD (<i>r</i> = 0.7125). Together, our results suggest that genetic variation in <i>MdNAC18</i> affects AFHD by modulating ethylene biosynthesis and provide an optimized GAP model for apple breeding.</p></div>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 11","pages":"2450-2469"},"PeriodicalIF":9.3,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141900296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeted mutagenesis in Arabidopsis and medicinal plants using transposon-associated TnpB 利用转座子相关 TnpB 在拟南芥和药用植物中进行定向诱变。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-07 DOI: 10.1111/jipb.13758
Zongyou Lv, Wenhua Chen, Shiyuan Fang, Boran Dong, Xingxing Wang, Lida Zhang, Jingshi Xue, Wansheng Chen
{"title":"Targeted mutagenesis in Arabidopsis and medicinal plants using transposon-associated TnpB","authors":"Zongyou Lv,&nbsp;Wenhua Chen,&nbsp;Shiyuan Fang,&nbsp;Boran Dong,&nbsp;Xingxing Wang,&nbsp;Lida Zhang,&nbsp;Jingshi Xue,&nbsp;Wansheng Chen","doi":"10.1111/jipb.13758","DOIUrl":"10.1111/jipb.13758","url":null,"abstract":"<p>The programmable nuclease TnpB is significantly smaller than Cas9, can edit genes in medicinal plants, including <i>Artemisia annua, Salvia miltiorrhiza, Scutellaria baicalensis, Isatis indigotica</i>, and <i>Codonopsis pilosula</i>, and has potential uses in molecular breeding to enhance crop yield and quality.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 10","pages":"2083-2086"},"PeriodicalIF":9.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13758","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Proteomic dynamics revealed sex-biased responses to combined heat-drought stress in Marchantia 蛋白质组动力学揭示了马钱子对热-旱综合胁迫的性别差异反应。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-07 DOI: 10.1111/jipb.13753
Sara Guerrero, Víctor Roces, Lara García-Campa, Luis Valledor, Mónica Meijón
{"title":"Proteomic dynamics revealed sex-biased responses to combined heat-drought stress in Marchantia","authors":"Sara Guerrero,&nbsp;Víctor Roces,&nbsp;Lara García-Campa,&nbsp;Luis Valledor,&nbsp;Mónica Meijón","doi":"10.1111/jipb.13753","DOIUrl":"10.1111/jipb.13753","url":null,"abstract":"<p>Recent studies have documented plant responses to climate change extensively, particularly to single-stress exposures. However, critical factors for stress survival, such as sexual differentiation, are not often considered. The dioicous <i>Marchantia polymorpha</i> stands as an evolutionary milestone, potentially preserving ancestral traits from the early colonizers. In this study, we employed proteomic analyses complemented with physiological monitoring to investigate combined heat and drought responses in Tak-1 (male) and Tak-2 (female) accessions of this liverwort. Additionally, targeted transcriptomics was conducted using different natural populations from contrasting environments. Our findings revealed sex-biased dynamics among natural accessions, particularly evident under control conditions and during early stress responses. Although Tak-2 exhibited greater diversity than Tak-1 under control conditions, male accession demonstrated distinct and more rapid stress sensing and signaling. These differences in stress response appeared to be strongly related to sex-specific plasticity influenced by geoclimatic origin. Furthermore, we established distinct protein gene ages and genomic distribution trends, underscoring the importance of protein diversification over time. This study provides an evolutionary perspective on sexual divergence and stress emergence employing a systems biology approach, which allowed for the establishment of global and sex-specific interaction networks in the stress response.</p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 10","pages":"2226-2241"},"PeriodicalIF":9.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13753","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fusarium graminearum effector FgEC1 targets wheat TaGF14b protein to suppress TaRBOHD-mediated ROS production and promote infection 禾本科镰刀菌效应子 FgEC1 以小麦 TaGF14b 蛋白为靶标,抑制 TaRBOHD 介导的 ROS 生成并促进感染。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-07 DOI: 10.1111/jipb.13752
Shengping Shang, Yuhan He, Qianyong Hu, Ying Fang, Shifeng Cheng, Cui-Jun Zhang
{"title":"Fusarium graminearum effector FgEC1 targets wheat TaGF14b protein to suppress TaRBOHD-mediated ROS production and promote infection","authors":"Shengping Shang,&nbsp;Yuhan He,&nbsp;Qianyong Hu,&nbsp;Ying Fang,&nbsp;Shifeng Cheng,&nbsp;Cui-Jun Zhang","doi":"10.1111/jipb.13752","DOIUrl":"10.1111/jipb.13752","url":null,"abstract":"<div>\u0000 \u0000 <p><i>Fusarium</i> head blight (FHB), caused by <i>Fusarium graminearum</i>, is a devastating disease of wheat globally. However, the molecular mechanisms underlying the interactions between <i>F. graminearum</i> and wheat remain unclear. Here, we identified a secreted effector protein, FgEC1, that is induced during wheat infection and is required for <i>F. graminearum</i> virulence. FgEC1 suppressed flg22- and chitin-induced callose deposition and reactive oxygen species (ROS) burst in <i>Nicotiana benthamiana</i>. FgEC1 directly interacts with TaGF14b, which is upregulated in wheat heads during <i>F. graminearum</i> infection. Overexpression of <i>TaGF14b</i> increases FHB resistance in wheat without compromising yield. TaGF14b interacts with NADPH oxidase respiratory burst oxidase homolog D (TaRBOHD) and protects it against degradation by the 26S proteasome. FgEC1 inhibited the interaction of TaGF14b with TaRBOHD and promoted TaRBOHD degradation, thereby reducing TaRBOHD-mediated ROS production. Our findings reveal a novel pathogenic mechanism in which a fungal pathogen acts via an effector to reduce TaRBOHD-mediated ROS production.</p></div>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 10","pages":"2288-2303"},"PeriodicalIF":9.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The combination of a microbial and a non-microbial biostimulant increases yield in lettuce (Lactuca sativa) under salt stress conditions by up-regulating cytokinin biosynthesis 在盐胁迫条件下,将一种微生物和一种非微生物生物刺激剂结合使用,可通过上调细胞分裂素的生物合成提高莴苣(Lactuca sativa)的产量。
IF 9.3 1区 生物学
Journal of Integrative Plant Biology Pub Date : 2024-08-07 DOI: 10.1111/jipb.13755
Patricia Benito, Marina Celdrán, Javier Bellón, Vicente Arbona, Miguel González-Guzmán, Rosa Porcel, Lynne Yenush, José M. Mulet
{"title":"The combination of a microbial and a non-microbial biostimulant increases yield in lettuce (Lactuca sativa) under salt stress conditions by up-regulating cytokinin biosynthesis","authors":"Patricia Benito,&nbsp;Marina Celdrán,&nbsp;Javier Bellón,&nbsp;Vicente Arbona,&nbsp;Miguel González-Guzmán,&nbsp;Rosa Porcel,&nbsp;Lynne Yenush,&nbsp;José M. Mulet","doi":"10.1111/jipb.13755","DOIUrl":"10.1111/jipb.13755","url":null,"abstract":"<p>Salinization poses a significant challenge in agriculture, exacerbated by anthropogenic global warming. Biostimulants, derived from living microorganisms or natural extracts, have emerged as valuable tools for conventional and organic agriculture. However, our understanding of the molecular mechanisms underlying the effects of biostimulants is very limited, especially in crops under real cultivation conditions. In this study, we adopted an integrative approach to investigate the effectiveness of the combined application of plant growth-promoting bacterium (<i>Bacillus megaterium</i> strain BM08) and a non-microbial biostimulant under control conditions (normal watering) and salt stress. After confirming the yield increase under both conditions, we investigated the molecular mechanisms underlying the observed effect by measuring a number of physiological parameters (i.e., lipid peroxidation, antioxidants, chlorophylls, total phenolics and phytohormone content), as well as RNA sequencing and primary metabolite analyses. Our findings reveal that the combined effect of the microbial and non-microbial biostimulants led to a decrease in the antioxidant response and an up-regulation of genes involved in cytokinin biosynthesis under salt stress conditions. This, in turn, resulted in a higher concentration of the bioactive cytokinin, isopentenyladenosine, in roots and leaves and an increase in γ-aminobutyric acid, a non-proteic amino acid related to abiotic stress responses. In addition, we observed a decrease in malic acid, along with an abscisic acid (ABA)-independent up-regulation of SR-kinases, a family of protein kinases associated with abiotic stress responses. Furthermore, we observed that the single application of the non-microbial biostimulant triggers an ABA-dependent response under salt stress; however, when combined with the microbial biostimulant, it potentiated the mechanisms triggered by the BM08 bacterial strain. This comprehensive investigation shows that the combination of two biostimulants is able to elicit a cytokinin-dependent response that may explain the observed yield increase under salt stress conditions.</p>","PeriodicalId":195,"journal":{"name":"Journal of Integrative Plant Biology","volume":"66 10","pages":"2140-2157"},"PeriodicalIF":9.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jipb.13755","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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