Journal of Plant Growth Regulation最新文献

{"title":"Trichoderma harzianum Protects the Arabidopsis Salt Overly Sensitive 1 Mutant Against Salt Stress","authors":"Akanksha Gandhi, Michael Reichelt, Divya Goyal, Jyothilakshmi Vadassery, Ralf Oelmüller","doi":"10.1007/s00344-024-11474-w","DOIUrl":"https://doi.org/10.1007/s00344-024-11474-w","url":null,"abstract":"<p>Salt stress is one of the major environmental factors that limits crop productivity. To mount an effective response to cope with salt stress, plants rely on the salt overly sensitive (SOS) pathway. The SOS1, SOS2 and SOS3 proteins are crucial for the maintenance of ion homeostasis and the <i>sos1</i> mutant is hypersensitive to salt stress. <i>Trichoderma harzianum,</i> a beneficial fungus, increases the tolerance of plants to abiotic stresses. We examined the effect of the <i>Trichoderma</i> strain on the performance of the <i>salt overly sensitive</i> (<i>sos1</i>) mutant of Arabidopsis under salt stress. Compared to the isogenic <i>glabra1</i> (<i>gl1</i>) control seedlings, the fresh weight, chlorophyll fluorescence, photosynthetic pigment content and transcript level of genes involved in ROS scavenging were increased in <i>Trichoderma-</i>inoculated <i>sos1</i> plants under 150 mM salt stress<i>. Trichoderma</i> also enhanced the accumulation of the osmolytes proline, alanine, as well as the sucrose and glucose in the salt-stressed <i>sos1</i>, but not <i>gl1</i> mutants, and the accumulation of Na⁺ was restricted in the <i>sos1</i> mutant. The beneficial effects of <i>T. harzianum</i> could be attributed to higher colonization rates of the <i>sos1</i> mutant compared to the <i>gl1</i> controls. In conclusion, these findings underscore that the <i>Trichoderma</i> strain activates stronger salt protective responses in the salt-sensitive <i>sos1</i> mutant than in control <i>gl1</i> plants. Therefore, the <i>Trichoderma</i> strain is a valuable tool to investigate how a beneficial endophyte can stimulate salt tolerance responses in the host to promote its performance under stress.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"11 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220201","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":"Halotolerant Bacillus Aryabhattai Strain PM34 Mitigates Salinity Stress and Enhances the Physiology and Growth of Maize","authors":"Muhammad Atif Azeem, Salman Khan, Fawad Ali, Sajjad Ahmad, Gul Rahim, Muhammad Iftikhar, Majid Iqbal, Rawa Saad Aljaloud, Khaloud Mohammed Alarjani, Hassan Javed Chaudhary","doi":"10.1007/s00344-024-11456-y","DOIUrl":"https://doi.org/10.1007/s00344-024-11456-y","url":null,"abstract":"<p>Maize is a versatile cereal underpinning global food security and industrial applications. Salinity impedes plant growth and productivity of crops by disrupting the ionic and osmotic balance and hormonal regulation. The present study aimed to examine the potential of plant growth-promoting rhizobacteria strains PM34 (<i>B. aryabhattai</i>) in mitigating salinity stress in maize. The selected rhizobacterium exhibited notable tolerance to NaCl, thriving in concentrations ranging from 0.5 to 1.5 M in LB medium. The efficient <i>B. aryabhattai</i> PM34 strain demonstrated siderophore production capabilities (55.64–50.46%), phosphate solubilization (24.42–21.23 µg.mL⁻¹), secretion of indole-3-acetic acid (81.29–58.31 µM.mL⁻¹) and 1-aminocyclopropane-1-carboxylate deaminase (2.12–1.08 µM/mg protein/h) and exopolysaccharides production (680–810 µg.mL⁻¹) at concentrations from 0 to 750 mM salt stress. PM34 inoculation significantly enhanced maize growth, including improvements in shoot length (19.88–50%), root length (16.32–44.84%), fresh weight (23.53–37.93%), dry weight (10–25.71%) and leaf area (20.25–40.91%) at salinity stress 0 to 300 mM in PM34 inoculated plants as compared to non-inoculated plants. PM34 inoculated plants showed increase in chlorophyll a (2.72–32.88%), b (10.09–86.36%), total chlorophyll (9.87–47.98%), and carotenoids (26.39–66.13%) content as compared to non-inoculated plants. Moreover, improvement in the activities of antioxidant enzymes superoxide dismutase (35.03–55.14%), peroxidase (60.94–22.86%), catalase (20.31–30.24%), ascorbate peroxidase (9.03–15.34%) and the accumulation of osmotic regulators proline (11.47–16.21%) and glycine betaine (10.12–20.25%), when compared to non-inoculated controls under salt stress conditions. Furthermore, maize augmented with halotolerant bacteria displayed reduction in electrolyte leakage (14.81–28.65%), malondialdehyde (20.92–37%), and sodium uptake (9.43–36.98%) when subjected to salt stress. These results contribute to the theoretical foundation and can be concluded that the inoculation of this PGPR can alleviate the adverse effects of salinity stress on maize.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"38 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220202","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":"Enhancing Plant Disease Resistance: Insights from Biocontrol Agent Strategies","authors":"Asha Rani Sheoran, Nita Lakra, Baljeet Singh Saharan, Annu Luhach, Ravinder Kumar, Chandra Shekhar Seth, Joginder Singh Duhan","doi":"10.1007/s00344-024-11480-y","DOIUrl":"https://doi.org/10.1007/s00344-024-11480-y","url":null,"abstract":"<p>Plant pathogens pose a significant threat to agricultural production due to their ability to cause diseases with substantial economic and environmental consequences. Effective management of plant pathogens is crucial for ensuring global food security and sustainability in agriculture. Biocontrol agents (BCAs) offer eco-friendly alternatives to conventional pesticides, harnessing the beneficial effects of symbiotic relationships between plants and microbes. BCAs operate through two primary mechanisms: biofertilization, where microorganisms enhance mineral availability, or by outcompeting the pathogens. The manipulation of plant microbiomes presents a promising avenue for achieving sustainable agriculture by improving nutrient uptake and disease resistance. This review comprehensively evaluates various strategies BCAs employ for plant pathogen management. These strategies encompass competition for resources and the production of antimicrobial compounds that inhibit pathogen growth. Additionally, BCAs modulate plant hormone levels, enhancing plant defence against pathogens and inducing systemic resistance mechanisms, priming plants for future pathogen attacks. Emerging techniques, such as the utilization of viruses and RNA interference, are explored for their potential to enhance BCA efficacy within integrated pest management frameworks. By leveraging viral pathogens and RNA molecules, BCAs can precisely target specific pathogens, reducing collateral damage to beneficial organisms. Implementing BCA-based pest management strategies diminishes the reliance on synthetic insecticides, mitigating ecological repercussions associated with chemical use. Integrated pest management practices fostered by BCAs promote long-term agricultural resilience, ensuring the robustness and efficiency of farming yields while minimizing environmental degradation.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"96 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220203","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":"Exogenous Auxin Enhances Stem Straightness in Paeonia lactiflora Cultivar by Modulating Cellulose Development and Vascular Tissue","authors":"Anqi Ren, Yang Yang, Yiran Huang, Yingling Wan, Yan Liu","doi":"10.1007/s00344-024-11471-z","DOIUrl":"https://doi.org/10.1007/s00344-024-11471-z","url":null,"abstract":"<p>The straightness of <i>Paeonia lactiflora</i> stems is pivotal for their use in cut flowers, often influenced by cellulose and other cell wall materials. Variances in auxin (IAA) content between straight and bending cultivars have been noted, yet the underlying mechanism remains elusive. Here, we treated the bending cultivar ‘Qi Hualushuang’ with 150 mg·L⁻¹ IAA across five developmental stages, examining morphological, anatomical, and cellulose metabolism-related changes. The results showed that exogenous IAA significantly improved stem straightness, plant height, and stem diameter. This improvement coincided with the early development of vascular tissue at the early and mid-stage of stem growth. IAA application down-regulated the expression of cellulose synthase genes, altering sucrose synthase and cellulase activities, ultimately resulting in higher cellulose content during the bud-breeding stage. Notably, an early accumulation of cellulose in vascular tissue was observed, characterized by earlier and more orderly arranged cellulose microfibrils, oriented at a smaller angle to the growth direction. This observation suggests that early cellulose development is advantageous for achieving stem straightness. Our study also found that the promotional effect of IAA on stem growth was mainly in the early stages, and other phytohormones may be jointly involved in the regulation. In summary, our study suggests that IAA enhances stem straightness by modulating the development of cell wall cellulose and vascular tissue. These findings provide a theoretical basis for the cultivation and trait improvement of <i>P. lactiflora</i> cut flower cultivars.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"1 5 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220205","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":"From Neurotransmitter to Plant Protector: The Intricate World of GABA Signaling and its Diverse Functions in Stress Mitigation","authors":"Abdullah, Kaiser Iqbal Wani, M. Naeem, Tariq Aftab","doi":"10.1007/s00344-024-11470-0","DOIUrl":"https://doi.org/10.1007/s00344-024-11470-0","url":null,"abstract":"<p>Gamma-aminobutyric acid (GABA) is a non-protein amino acid and has been thoroughly studied in animals, where it works as a neurotransmitter. In plants, GABA was found to be a signaling molecule after the discovery of its binding sites. GABA metabolism takes place through the GABA shunt. It occurs in mitochondria and bypasses two steps of the tricarboxylic acid (TCA) cycle. It is also produced via proline and polyamine metabolic pathways. Both abiotic and biotic stress conditions affect plant’s growth and development. These stresses impact respiration and energy production in mitochondria, resulting in the elevated production of reactive oxygen species (ROS), which ultimately leads to cell death. The synthesis of GABA aids in the restoration of respiratory processes and energy production. Its accumulation is observed during plant stress conditions. In stress conditions, GABA concentration increases which raises the tolerance level of plants. It mitigates ROS formation, improves photosynthetic machinery, regulates the opening of stomata, and activates antioxidant enzymes. The transport of GABA is crucial for its functioning throughout plants, making it important to understand its cell and organelle transport. This review describes the biosynthesis, distribution, transport, and signaling roles of GABA, and also highlights the management aspects of the GABA shunt pathway for ROS production and in the defense mechanism of plants.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"5 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220204","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":"Genome-Wide Identification, Evolution, and Characterization of GATA Gene Family and GATA Gene Expression Analysis Post-MeJA Treatment in Platycodon grandiflorum","authors":"Weichao Ren, Lingyang Kong, Shan Jiang, Lengleng Ma, Honggang Wang, Xiangquan Li, Yunwei Liu, Wei Ma, Xueying Yan","doi":"10.1007/s00344-024-11468-8","DOIUrl":"https://doi.org/10.1007/s00344-024-11468-8","url":null,"abstract":"<p>The GATA-binding factor (GATA) plays a major role in regulating plant development and response to distinct environmental stresses. At present, GATAs are characterized in various model plant species, including <i>Arabidopsis thaliana</i> and <i>Oryza sativa.</i> However, the <i>GATA</i> gene family in <i>Platycodon grandiflorum</i> is not yet fully understood<i>.</i> The study aimed to develop a comprehensive understanding of the GATA TFs and explore the regulatory mechanism of methyl jasmonate (MeJA) on the GATA members in <i>P. grandiflorum</i>. A total of 22 <i>PgGATAs</i> were identified based on publicly available genome data of <i>P. grandiflorum</i>, and each member was analyzed in detail. The 22 identified genes were distributed across nine chromosomes. Their phylogenetic tree and domain structures showed that the GATAs could be clustered into four subfamilies (A–D). The structural protein domains and conserved motifs of the PgGATA family members were relatively conserved across different subfamilies. Light and hormone response elements were found in abundance in the promoter sequences. In addition, quantitative real-time polymerase chain reaction (qRT-PCR) indicated that <i>PgGATA4</i>, <i>6</i>, <i>7</i>, <i>8</i>, and <i>11</i> were sensitive to MeJA treatment in <i>P. grandiflorum</i> roots. Nevertheless, co-expression network analysis revealed that the activities of the genes in the family remained significantly correlated, suggesting possible synergy in their functions. Two (<i>PgGATA5</i> and <i>PgGATA9</i>) and three (<i>PgGATA8</i>, <i>PgGATA11</i>, and <i>PgGATA22</i>) hub <i>PgGATAs</i> were identified that might have central functions in <i>P. grandiflorum</i> tissues and MeJA-treated roots, respectively. This study provided detailed information about the <i>PgGATA</i> gene family and facilitated a functional characterization of the candidate genes.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"83 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220229","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":"Response of Soybean Plants to the Foliar Application of Carbon Quantum Dots Under Drought Stress: A Field Study","authors":"Salar Farhangi-Abriz, Kazem Ghassemi-Golezani, Shahram Torabian, Saeedeh Rahimzadeh, Fardaneh Osati, Hoseyn Safarpour","doi":"10.1007/s00344-024-11464-y","DOIUrl":"https://doi.org/10.1007/s00344-024-11464-y","url":null,"abstract":"<p>Drought stress may be mitigated by the high electron transfer capability of carbon quantum dots, effectively improving the growth and physiological efficiency of plants under stress. Accordingly, a two-year field experiment was conducted to examine the effects of carbon quantum dots on physiological efficiency of soybean plants under drought stress. The carbon quantum dots were applied as a foliar treatment at a concentration of 5 mg L⁻¹ on soybean plants under normal and water-stress conditions. The results showed that the application of carbon quantum dots did not have a noticeable impact on the physiological performance of plants under regular irrigation. However, under drought stress, carbon quantum dots significantly improved various parameters, including soybean ground green cover (about 14%), leaf area (21%), chlorophyll content (18%), maximum efficiency of photosystem II (19%), relative photosynthetic electron transport rate (23%), leaf water content, osmolyte production, antioxidative activities, and grain yield (25%). Additionally, carbon quantum dots reduced the generation of reactive oxygen species, lipid peroxidation, and osmotic stress during drought conditions. These findings suggest that carbon quantum dots can protect plant cells from oxidative and osmotic damage, thereby enhancing physiological performance during periods of drought stress. These results reveal the potential of CQDs as a promising tool for enhancing drought tolerance in soybean plants, with implications extending beyond this crop. The mechanistic insights highlighted the broader applicability of CQD treatments in agriculture, offering a novel strategy to mitigate drought stress across diverse crop species. Our study also offers tangible benefits for farmers and researchers, paving the way for sustainable crop management practices in the face of climate change-induced challenges.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"22 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220206","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":"Causes and Breaking of Seed Dormancy in Ammodendron bifolium (Pall.) Yakovl. from the Takeermohuer Desert","authors":"Naifeisai Nuerhamanti, Jiaqin Liu, Zhining Kou, Juan Lu, Yanlei Zhu","doi":"10.1007/s00344-024-11465-x","DOIUrl":"https://doi.org/10.1007/s00344-024-11465-x","url":null,"abstract":"<p><i>Ammodendron bifolium</i> is an endangered plant in the Takeermohuer Desert. Its population has gradually decreased due to human activities and the harsh climate, and this decrease was exacerbated by low germination rates in the natural environment. However, the cause and classification of seed dormancy are not entirely clear. We investigated the contributions of seed coats, embryos, and endogenous hormones to seed dormancy and explored methods for breaking dormancy. Studies have shown that <i>A. bifolium</i> seeds exhibit high vitality and impermeability and seed coats and embryos contain germination inhibitors; thus, dormancy of <i>A. bifolium</i> seeds can be classified as exhibiting combinational dormancy based on Baskin’s category system. The authors hypothesized that endogenous abscisic acid (ABA) might be critical for inducing seed dormancy. In addition, this study indicated that ethylene (ETH), 1-aminocyclopropane carboxylic acid (ACC), trans-zeatin-riboside (tZR), fluridone (FL), and thiourea (CH₄N₂S) could be used to break dormancy after scarification treatment. The findings of this study provide a better understanding of the dormancy mechanism of <i>A. bifolium</i> seeds and lay the foundation for the revegetation of desert <i>A. bifolium.</i></p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"289 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220207","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":"Disruption in Jasmonic Acid Biosynthesis Influences Metabolism of Other Hormones in Arabidopsis","authors":"Aarti Gupta, Yasuko Watanabe, Chien Van Ha, Mostafa Abdelrahman, Weiqiang Li, Md. Mezanur Rahman, Sanjida Sultana Keya, Deepti Nigam, Yinping Jiao, Touhidur Rahman Anik, Gopal Saha, Mikiko Kojima, Hitoshi Sakakibara, Keiichi Mochida, Lam-Son Phan Tran","doi":"10.1007/s00344-024-11446-0","DOIUrl":"https://doi.org/10.1007/s00344-024-11446-0","url":null,"abstract":"<p>Hormones are the key mediators of plant growth, development, and adaptive responses to diverse environmental growth conditions. However, the knowledge of how the endogenous concentration of a hormone affects those of other hormones in plants during their growth is not completely comprehended. JA (jasmonic acid) is a key hormone having multifaceted roles in shaping plant growth and development and driving plant responses to abiotic and biotic stressors. Here, we studied how the disruption in the JA biosynthetic pathway in <i>Arabidopsis thaliana</i> affects the homeostasis of other hormones by measuring the concentrations of various hormones, including ABA (abscisic acid), AUX [auxin, specifically IAA (indole-3-acetic acid)], CKs (cytokinins), GAs (gibberellins), and SA (salicylic acid) in 10 days old <i>Arabidopsis</i> JA-deficient <i>aos</i> (<i>allene oxide synthase</i>) knock-out mutant seedlings. We noted increased levels of <i>trans</i>-zeatin class of CKs but reduced levels of <i>cis</i>-zeatin and isopentenyladenine class of CKs, as well as reduced levels of IAA, GAs, and SA in the <i>aos</i> mutant seedlings, compared with WT (wild-type) seedlings. We also noted reduced expression levels of the genes associated with AUX biosynthesis but increased expression levels of the genes associated with the catabolism of SA and GAs in <i>aos</i> mutant plants compared with those of corresponding genes in WT plants. These results indicate that the levels of these hormones are positively correlated with that of JA in plants during their growth, at least at the seedling stage.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"3 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220208","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":"Sulfur Dioxide Enhances Tobacco Resistance to Black Shank Disease via the Jasmonic Acid Pathway","authors":"Dongliang Xu, Xukai Dong, Qingqing Yan, Jianbo Chang, Xiaoquan Zhang, Fuxing Li, Fengjie Wei, Zongliang Xia","doi":"10.1007/s00344-024-11445-1","DOIUrl":"https://doi.org/10.1007/s00344-024-11445-1","url":null,"abstract":"<p>Tobacco black shank (TBS) disease, caused by <i>Phytophthora nicotianae</i> (<i>P. nicotianae</i>), poses a severe threat to tobacco productivity, necessitating the identification of effective control methods. Sulfur dioxide (SO₂) has emerged as a signaling molecule involved in modulating plant stress responses, yet its role in inducing resistance to TBS in tobacco remains unclear. This study investigated the potential of enhancing TBS resistance through root irrigation with SO₂ derivatives and elucidates the underlying mechanisms. Our findings revealed that SO₂ derivative root irrigation significantly enhanced tobacco resistance to TBS. This was evidenced by reduced malondialdehyde levels, increased hydrogen peroxide accumulation, and elevated activities of antioxidant enzymes such as superoxide dismutase and peroxidase. Moreover, analyses of phytohormones—jasmonic acid (JA), salicylic acid, abscisic acid, and ethylene—indicated a notable increase in endogenous JA levels in SO₂-pretreated plants. The application of the JA biosynthesis inhibitor diethyldithiocarbamate acid (DIECA) significantly decreased JA levels and attenuated the SO₂-induced TBS resistance. Furthermore, transcription of several JA-responsive defense genes was significantly upregulated in SO₂-pretreated plants during <i>P. nicotianae</i> infection. These results demonstrate that SO₂ application elevates endogenous JA levels, thereby activating the antioxidant defense system and enhancing TBS resistance in tobacco plants. This study advances our understanding of SO₂-induced resistance mechanisms and offers an effective, economical, and environmentally friendly strategy for managing soil-borne fungal diseases in crop production.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"111 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220230","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}