Journal of plant physiology最新文献

{"title":"Hydrological transport and endosperm weakening mechanisms during dormancy release in Tilia henryana seeds","authors":"Chen Yin Peng ,&nbsp;Yu Wu ,&nbsp;Qi Long Hua ,&nbsp;Yong Bao Shen","doi":"10.1016/j.jplph.2024.154405","DOIUrl":"10.1016/j.jplph.2024.154405","url":null,"abstract":"<div><div>Seed germination is a pivotal stage in the plant life cycle, with endosperm weakening and radicle elongation serving as crucial prerequisites for successful endospermic seed germination. <em>Tilia henryana</em> seeds exhibit deep dormancy, necessitating a period of 2–3 years to germinate in a natural environment, and the germination rate is extremely low. This study employed morphological and physiological approaches to dynamically analyzing the hydrological mechanism and the endosperm weakening process during the dormancy release of <em>T. henryana</em> seeds. It was found that there was no physiological post-ripening effect of embryos, but there were mechanical and physiological obstacles in endosperm. During the dormancy release process of <em>T. henryana</em> seeds, initial endosperm weakening occurred at the radicle-endosperm interface. In this process, the GA/ABA level is imbalanced along with a continuous decrease in IAA and SA levels. Substantial depletion of storage materials within cells resulted in degradation of endosperm cell contents, forming numerous cavities through which significant amounts of free water entered. As moisture content increased, endosperm hardness gradually decreased to approximately 5 N/0.09 cm². Furthermore, the area and content of lignin and cellulose were reduced by 58.91% and 84.49%, respectively, while the hemicellulose and pectin contents were decreased by 72.11% and 83.50%, in that order. Following treatment, the activity of pectin lyase, propectinase, galacturonase, and cellulase was observed to be 5.81, 8.72, 5.96, and 9.43 times higher, respectively, in comparison to their respective activities before treatment. The physiological changes facilitated the rapid rupture of the endosperm cell wall, leading to a transition in cell morphology from palisade-like to irregular and interlocking, thereby further expediting the weakening and cleavage of the endosperm. Additionally, <em>T. henryana</em> seeds exhibited high carbohydrate composition content throughout their dormancy release process, this extensive utilization of storage substances provided energy for radicle elongation and expansion.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154405"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142846704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stratification of apple seeds in the context of ROS metabolism","authors":"Katarzyna Ciacka,&nbsp;Marcin Tyminski,&nbsp;Agnieszka Gniazdowska,&nbsp;Urszula Krasuska","doi":"10.1016/j.jplph.2024.154407","DOIUrl":"10.1016/j.jplph.2024.154407","url":null,"abstract":"<div><div>Apple (<em>Malus domestica</em> Borkh.) seeds exhibit deep embryonic dormancy. Uniform germination of isolated apple embryos is observed after 40-day-long cold stratification of the seeds. Stratification treatment modifies the level of reactive oxygen species (ROS), which are regarded as key regulators of seed dormancy. In this study, axes of embryos isolated from seeds stratified for 7, 14, 21, and 40 days differing in dormancy depth were used. After one week of stratification, the increased polyamine oxidase activity enables ROS generation, which is followed by an upregulation of the NADPH oxidase gene expression. Catalase activity increased after 14 days of stratification, suggesting the requirement to maintain ROS concentrations at an optimal level already in the early phase of dormancy removal. When cold stratification was prolonged, accompanied by a significant increase in ROS level, ROS scavenging by catalase was supported by elevated phenolic compounds content. Then, peroxidase activity was also the highest. As ROS-induced phenylalanine (Phe) oxidation leads to the formation of <em>meta-</em>tyrosine (<em>m</em>-Tyr) - a potentially toxic component, the levels of these amino acids were examined. The fluctuation in <em>m</em>-Tyr content indicates the existence of mechanisms in the tissue for the disposal of this compound. Finally, its presence may be mitigated by an increase in Phe levels. Maintaining oxidised RNA at elevated levels from the 14th day of stratification may be crucial for seed dormancy removal, ensuring translation regulation as metabolism resumes. We concluded that dormancy removal of apple seeds by stratification requires a time-dependent sequence of biochemical events reflecting ROS metabolism alterations.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154407"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Humboldt review: The role of Ancestral MicroRNAs in grass inflorescence development","authors":"Reyhaneh Ebrahimi Khaksefidi ,&nbsp;Weiwei Chen ,&nbsp;Chaoqun Shen ,&nbsp;Peter Langridge ,&nbsp;Matthew R. Tucker ,&nbsp;Dabing Zhang","doi":"10.1016/j.jplph.2024.154417","DOIUrl":"10.1016/j.jplph.2024.154417","url":null,"abstract":"<div><div>Plant inflorescences are complex, highly diverse structures whose morphology is determined in meristems that form during reproductive development. Inflorescence structure influences flower formation, and consequently grain number, and yield in crops. Correct inflorescence and flower development require tight control of gene expression via complex interplay between regulatory networks. MicroRNAs (miRNAs) have emerged as fundamental modulators of gene expression at the transcriptional and/or post-transcriptional level in plant inflorescence development. First discovered more than three decades ago, miRNAs have proved to be revolutionary in advancing our mechanistic understanding of gene expression. This review highlights current knowledge of downstream target genes and pathways of some highly conserved miRNAs that regulate the maintenance, identity, and activity of inflorescence and floral meristems in economically and agriculturally important grass species, including rice (<em>Oryza sativa</em>), maize (<em>Zea mays</em>), barley (<em>Hordeum vulgare</em>), and wheat (<em>Triticum aestivum</em>). Furthermore, we summarize emerging regulatory networks of miRNAs and their targets to suggest new avenues and strategies for application of miRNAs as a tool to enhance crop yield and performance.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154417"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142926773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salicylic acid cooperates with different small molecules to control biotic and abiotic stress responses","authors":"Kexing Xin ,&nbsp;Yining Wu ,&nbsp;Aziz Ul Ikram ,&nbsp;Yanping Jing,&nbsp;Shan Liu,&nbsp;Yawen Zhang,&nbsp;Jian Chen","doi":"10.1016/j.jplph.2024.154406","DOIUrl":"10.1016/j.jplph.2024.154406","url":null,"abstract":"<div><div>Salicylic acid (SA) is a phytohormone that plays a critical role in plant growth, development, and response to unfavorable conditions. Over the past three decades, researches on SA have deeply elucidated the mechanism of its function in plants tolerance to infection by biotrophic and hemibiotrophic pathogens. Recent studies have found that SA also plays an important role in regulating plants response to abiotic stress. It is emerging as a strong tool for alleviating adverse effects of biotic and abiotic stresses in crop plants. During SA-mediated stress responses, many small molecules participate in the SA modification or signaling, which play important regulatory roles. The cooperations of small molecules in SA pathway remain least discussed, especially in terms of SA-induced abiotic stress tolerance. This review provides an overview of the recent studies about SA and its relationship with different small molecules and highlights the critical functions of small molecules in SA-mediated plant stress responses.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154406"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adenylate-driven equilibration of both ribo- and deoxyribonucleotides is under magnesium control: Quantification of the Mg2+-signal","authors":"Leszek A. Kleczkowski ,&nbsp;Abir U. Igamberdiev","doi":"10.1016/j.jplph.2024.154380","DOIUrl":"10.1016/j.jplph.2024.154380","url":null,"abstract":"<div><div>Nucleoside mono-, di- and triphosphates (NMP, NDP, and NTP) and their deoxy-counterparts (dNMP, dNDP, dNTP) are involved in energy metabolism and are the building blocks of RNA and DNA, respectively. The production of NTP and dNTP is carried out by several NMP kinases (NMPK) and NDP kinases (NDPK). All NMPKs are fully reversible and use defined Mg-free and Mg-complexed nucleotides in both directions of their reactions, with Mg²⁺ controlling the ratios of Mg-free and Mg-complexed reactants. Their activities are driven by adenylates produced by adenylate kinase which controls the direction of NMPK and NDPK reactions, depending on the energy status of a cell. This enzymatic machinery is localized in the cytosol, mitochondria, and plastids, i.e. compartments with high energy budgets and where (except for cytosol) RNA and DNA synthesis occur. Apparent equilibrium constants of NMPKs, based on total nucleotide contents, are [Mg²⁺]-dependent. This allows for an indirect estimation of internal [Mg²⁺], which constitutes a signal of the energetic status of a given tissue/cell/compartment. Adenylates contribute the most to this Mg²⁺-signal, followed by uridylates, guanylates, and cytidylates, with deoxynucleotides’ contribution deemed negligible. A method to quantify the Mg²⁺-signal, using nucleotide datasets, is discussed.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154380"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142876508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Individual and interactive effects of temperature and blue light on canola growth, lignin biosynthesis and methane emissions","authors":"Brooke T. Dauphinee,&nbsp;Mirwais M. Qaderi","doi":"10.1016/j.jplph.2024.154402","DOIUrl":"10.1016/j.jplph.2024.154402","url":null,"abstract":"<div><div>It is now well documented that plants produce methane (CH₄) under aerobic conditions. However, the mechanisms of methane production in plants, its potential precursors, and the factors that are involved in the process are not fully understood. Few studies have considered the effects of blue light on methane emissions from plants; however, the combined effects of temperature and blue light have not been studied. We studied the effects of two temperature regimes (22/18 °C and 28/24 °C; 16 h light/8 h dark), and three blue light levels (0, 4, and 8 mW cm⁻²; 400–500 nm) on the growth, lignin, and methane emissions of canola (<em>Brassica napus</em>). Plants were grown under experimental conditions for three weeks, and then methane, monolignols and other plant traits, including growth, biomass, growth index, photosynthesis, chlorophyll fluorescence, and photosynthetic pigments, were measured. Blue light significantly increased methane emissions, stem height, and growth rate, but decreased stem diameter, leaf number and area, biomass, specific leaf mass, leaf area ratio, shoot/root mass ratio, photosynthetic pigments, sinapyl alcohol, and coniferyl aldehyde. Higher temperature significantly decreased stem diameter, non-photochemical quenching, sinapyl alcohol, and coniferyl aldehyde. Methane emission was negatively correlated with plant dry mass, leaf area per plant, and maximum quantum yield of photosystem II. However, no significant relationships were found between methane and monolignols. In conclusion, plants emitted more methane under stress conditions; however, further studies are required to understand the potential precursors of methane and the mechanism of its synthesis in plants.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154402"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partial replacement by ammonium nutrition enhances Brassica napus growth by promoting root development, photosynthesis, and nitrogen metabolism","authors":"Wen Zhang ,&nbsp;Venuste Munyaneza ,&nbsp;Dandan Wang ,&nbsp;Chenfeng Huang ,&nbsp;Siyuan Wu ,&nbsp;Mingcun Han ,&nbsp;Xu Wang ,&nbsp;Surya Kant ,&nbsp;Guangda Ding","doi":"10.1016/j.jplph.2024.154411","DOIUrl":"10.1016/j.jplph.2024.154411","url":null,"abstract":"<div><div>Nitrogen (N) is crucial for plant growth, available primarily as nitrate (NO₃⁻) and ammonium (NH₄⁺). However, its presence in soil is often limited, necessitating strategies to augment N availability. This study delves into the enigmatic interplay between NO₃⁻ and NH₄⁺ in fostering the growth of <em>Brassica napus</em>, an important oil crop worldwide. Here, we examined the growth responses of 49 <em>B. napus</em> varieties to five NH₄⁺:NO₃⁻ ratios (12:0, 9:3, 3:9, 1:11, 0:12). In general, the biomass of 49 rapeseed varieties increased with the decrease of NH₄⁺ to NO₃⁻ ratios in the growth environment. However, different varieties may respond diversely to the mixed N sources, or sole NO₃⁻ or NH₄⁺ condition. For some cultivars, the mixed N supply significantly enhanced the plant growth compared with the sole NO₃⁻ conditions. Thus, we further investigate the morphological, physiological and molecular response of rapeseed to the mixed N source condition using sole NO₃⁻ as a control. The results show that partial replacement by ammonium nutrition in the environment can promote rapeseed root development, net photosynthetic rate and NO₃⁻ reduction compared to NO₃⁻-only conditions. Using transcriptome analysis, we found a total of 399 and 465 genes which were differentially expressed in root and shoot under A1N11 compared to A0N12 treatments, respectively. Genes involved in photosynthesis, N uptake and assimilation were upregulated by mixed N supplies. These findings highlight that the mixed N supply primarily stimulates <em>B. napus</em> growth by enhancing root development, photosynthesis and N metabolism in the shoot. Such insights are crucial for optimizing N form selection in <em>B. napus</em> to enhance plant performance and N use efficiency.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154411"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid changes in stress-related gene expression after short exposure of Arabidopsis leaves to cold plasma","authors":"Alexis Porcher ,&nbsp;Emmanuel Duffour ,&nbsp;Frédéric Perisse ,&nbsp;Sébastien Menecier ,&nbsp;Vincent Guérin ,&nbsp;Maxime Moreau ,&nbsp;Chloé Davranche ,&nbsp;Françoise Paladian ,&nbsp;Pierre Bonnet ,&nbsp;Alain Vian","doi":"10.1016/j.jplph.2024.154397","DOIUrl":"10.1016/j.jplph.2024.154397","url":null,"abstract":"<div><div>Cold Atmospheric Plasma (CAP) technology has emerged as a promising tool in various biological applications due to its ability to generate a composite signal comprising reactive oxygen and nitrogen species, ultraviolet radiation, and electromagnetic fields, all while maintaining a stable temperature. Although CAP treatments have demonstrated significant effects on seed germination and plant growth, the direct molecular responses of plants to CAP exposure remain poorly understood. In this study, young <em>Arabidopsis thaliana</em> leaves were exposed to a brief 5- or 30-s localized CAP treatment, resulting in rapid and localized tissue damage without causing lethal effects on the entire plant. Molecular analyses conducted on the entire plant rosette revealed a notable increase in hydrogen peroxide levels, along with the upregulation of stress-related genes, akin to a wound response. Of particular interest, the activation of RelA/SpoT Homolog (RSH) genes encoding proteins that regulate the synthesis of the stress marker (p)ppGpp, also known as alarmone, and playing a major role in the energic regulation of photosynthesis, occurred shortly after CAP exposure. The expression of <em>RSH</em> genes was up-regulated after 5s CAP exposure, while the wound stress marker <em>ZAT12</em> remained unaffected, highlighting a specific signalling pathway to activate <em>RSH</em> genes. This finding suggests the potential involvement of the alarmone signalling pathway in the plant's response to CAP exposure, thereby opening avenues for further exploration of metabolic pathways and signalling cascades induced by CAP treatment.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154397"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of two amino acid transporter-like genes on potato growth","authors":"Chao Zhang ,&nbsp;Mingying Shi ,&nbsp;Yuquan Lin ,&nbsp;Qin Chen ,&nbsp;Xingren Shi","doi":"10.1016/j.jplph.2024.154408","DOIUrl":"10.1016/j.jplph.2024.154408","url":null,"abstract":"<div><div>Amino acid transporters are membrane proteins that mediate amino acid transport across the plasma membrane. They play a significant role in plant growth and development. The amino acid permease (AAP) subfamily belongs to the activating transcription factor family, which is one of the main amino acid transporter families. Potato AAP genes were identified through simple bioinformatics, and the functions of <em>StAAP1</em> and <em>StAAP8</em> were verified by plant subcellular localization and potato transgenic technology. In this study, eight AAP-like genes in potato were separated into two subgroups based on the differences in the number of pore-lining residues. To identify the locations where the genes were expressed, we built green fluorescent protein expression vectors for two genes, <em>StAAP1</em> and <em>StAAP8</em>, and found that these two genes were expressed on the plasma membrane. Meanwhile, we constructed overexpression vectors for these two genes to construct transgenic plants. By observing the phenotype of the transgenic plants, we concluded that <em>StAAP1</em> and <em>StAAP8</em> promoted leaf growth and increased leaf area and <em>StAAP1</em> elongated the potato tubers. Overall, these two genes did not significantly affect tuber weight or number. However, the assessment of amino acid content in potato tubers showed that <em>StAAP8</em> overexpression increased the content of amino acids, and some of these amino acids were related to protein synthesis. Therefore, <em>StAAP8</em> overexpression may promote the accumulation of plant amino acids. Studies have shown that there are some differences in the functions of different transcription factor members. The studied AAP8 gene plays a role in amino acid transport and protein accumulation in potato tubers, which provides support for subsequent research on potato tuber nutrition.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154408"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LcMYB5, an R2R3-MYB family gene from Lonicera caerulea L., enhances drought and salt tolerance in transgenic tobacco and blue honeysuckle","authors":"Chunlin Fu ,&nbsp;Chunyang Bian ,&nbsp;Jing Chen ,&nbsp;Qian Zhang ,&nbsp;Dong Qin ,&nbsp;Jiangkuo Li ,&nbsp;Peng Zhang ,&nbsp;Junwei Huo ,&nbsp;Huixin Gang","doi":"10.1016/j.jplph.2024.154409","DOIUrl":"10.1016/j.jplph.2024.154409","url":null,"abstract":"<div><div>MYB transcription factors exert crucial functions in enhancing plant stress tolerance, which is impacted by soil drought and salinity. In our study, the R2R3-type MYB transcription factor gene <em>LcMYB5</em> from blue honeysuckle (<em>Lonicera caerulea</em> L.) was successfully cloned and identified, and confirmed its nuclear localization. <em>LcMYB5</em> overexpression was vastly enhanced drought and salt tolerance in both blue honeysuckle and tobacco seedlings. After drought stress, transgenic tobacco exhibited an average survival rate of 70.30%, while most wild-type (WT) plants perished, resulting in a survival rate of only 15.33%. Following salt stress, the average survival rate for transgenic tobacco reached 77.24%, compared to just 22.47% for WT plants. Measurements indicated, that transgenic tobacco had higher proline content than WT, as well as higher superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activity. Transgenic tobacco decreased chlorophyll content less dramatically than WT tobacco, despite both tobaccos having decreased chlorophyll content. Furthermore, the level of malondialdehyde (MDA) and relative conductivity were lower in transgenic tobacco compared to WT. Furthermore, LcMYB5 overexpression significantly increased the expression levels of key genes related to drought stress (<em>NCED1</em>, <em>NCED2</em>, <em>PYL4</em>, <em>PYL8</em>, and <em>CBL1</em>) and salt stress (<em>NHX1</em>, <em>SOD</em>, <em>CAT1</em>, <em>SOS1</em>, and <em>HSP17.8</em>), thus improving transgenic tobacco's stress tolerance. Compared to WT blue honeysuckle, transiently transformed LcMYB5-expressing blue honeysuckle exhibited milder damage under stress conditions, a significant increase in chlorophyll and proline content was observed, the activities of SOD, POD and CAT were also significantly increased, the increase in MDA content and relative conductivity is relatively small. Additionally, In addition, transient expression of <em>LcMYB5</em> can also positively regulate the expression of these five key genes of drought stress and five key genes of salt stress, so as to improve the resistance of transgenic blue honeysuckle to drought and salt stress. In summary, our study reveals the important regulatory role of <em>LcMYB5</em> in plant resistance to drought and salt stress, providing theoretical support and potential application value for further improving crop stress resistance.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"304 ","pages":"Article 154409"},"PeriodicalIF":4.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}