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The MYC2-PUB22-JAZ4 module plays a crucial role in jasmonate signaling in tomato

Molecular Plant 2024年第4期17卷 598-613页

作者： Shaofang Wu Chaoyi Hu Changan Zhu Yanfen Fan Jie Zhou Xiaojia Xia Kai Shi Yanhong Zhou Christine H.Foyer Jingquan Yu Department of Horticulture Zijingang CampusZhejiang UniversityHangzhou 310058China Hainan Institute Zhejiang UniversityYazhou Bay Science and Technology CitySanya 572025China College of Horticulture Northwest Agriculture&Forestry UniversityXianyang 712100China School of Biosciences College of Life and Environmental SciencesUniversity of BirminghamEdgbaston B152TTUK Key Laboratory of Horticultural Plants Growth and Development Agricultural Ministry of ChinaZhejiang UniversityHangzhou 310058China

Jasmonates(JAs),a class of lipid-derived stress hormones,play a crucial role across an array of plant physiological processes and stress responses.Although JA signaling is thought to rely predominantly on the degradation of specific JAZ proteins by SCF^(COI1),it remains unclear whether other pathways are involved in the regulation of JAZ protein stability.Here,we report that PUB22,a plant U-box type E3 ubiquitin ligase,plays a critical role in the regulation of plant resistance against Helicoverpa armigera and other JA responses in tomato.Whereas COI1 physically interacts with JAZ1/2/5/7,PUB22 physically interacts with JAZ1/3/4/6.PUB22 ubiquitinates JAZ4 to promote its degradation via the 26S proteasome pathway.Importantly,we observed that pub22 mutants showreduced resistance to H.armigera,whereas jaz4 single mutants and jaz1 jaz3 jaz4 jaz6 quadruple mutants have enhanced resistance.The hypersensitivity of pub22 mutants to herbivores could be partially rescued by JAZ4 mutation.Moreover,we found that expression of PUB22 can be transcriptionally activated by MYC2,thus forming a positive feedback circuit in JA signaling.We noticed that the PUB22-JAZ4 module also regulates other JA responses,including defense against B.cinerea,inhibition of root elongation,and anthocyanin accumulation.Taken together,these results indicate that PUB22 plays a crucial role in plant growth and defense responses,together with COI1-regulated JA signaling,by targeting specific JAZs.

关键词： PUB22 JAZ COI1 MYC2 JA signaling solanum lycopersicum

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Interactions of zinc and cadmium toxicity in their effects on growth and in antioxidative systems in tomato plants (solanum lycopersicum)

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Journal of Environmental Sciences 2011年第5期23卷 837-844页

作者： Jaouhra Cherif Chamseddine Mediouni Wided Ben Ammar Fatma Jemal Unit of Research "Nitrogenized Nutrition and Metabolism and Stress Proteins" UR 99/09-20 Department of BiologyFaculty of Science University of Tunis Tunis 2092 Tunisia Unit of Research "Nitrogenized Nutrition and Metabolism and Stress Proteins" UR 99/09-20 Department of BiologyFaculty of ScienceUniversity of Tunis Tunis 2092 Tunisia

The interaction between zinc and cadmium was investigated in tomato plants （solanum lycopersicum）. Ten-day-old seedlings were treated with 10 μmol/L CdC12 associated to different concentrations of ZnC12 （10, 50, 100, and 150 μmol/L）. Zn supply clearly reduced Cd accumulation in leaves and simultaneously increased Zn concentration. Cd induced oxidative stress in leaves as indicated by an increase in thiobarbituric acid-reactive substances （TBARS） level and chlorophyll breakdown. Furthermore, compared with control, Cd- treated plants had significantly higher activities of superoxide dismutase （SOD, EC 1.***.1.1）, whereas, catalase （CAT, EC 1.***.1.6）, ascorbate peroxidase （APX, EC 1.***.1.11）, and glutathione reductase （GR, EC 1.***.4.2） activities were significantly suppressed by Cd addition. Zn supplementation, at low level, restored and enhanced the functional activity of these enzymes （SOD, CAT, APX and GR） as compared to Cd-alone-treated plants. The beneficial effect of adequate Zn level on Cd toxicity was confirmed by a significant decrease in TBARS level and restoration of chlorophyll content. However, when Zn was added at high level in combination with Cd there was an accumulation of oxidative stress, which was higher than that for Cd or excess Zn alone treatments. These results suggested that higher Zn concentrations and Cd are synergistic in their effect on plant growth parameters and oxidative stress.

关键词： solanum lycopersicum cadmium zinc oxidative stress antagonism synergism.

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Identifi cation of micro RNAs in two species of tomato, solanum lycopersicum and solanum habrochaites,by deep sequencing

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Journal of Integrative Agriculture 2015年第1期14卷 42-49页

作者： FAN Shan-shan LI Qian-nan GUO Guang-jun GAO Jian-chang WANG Xiao-xuan GUO Yan-mei John C.Snyder DU Yong-chen Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences Institute of Plant Protection Chinese Academy of Agricultural Sciences Graduate School of Chinese Academy of Agricultural Sciences Department of Agronomy University of Kentucky

MicroRNAs （miRNAs） are -21 nucleotide （nt）, endogenous RNAs that regulate gene expression in plants. Increasing evidence suggests that miRNAs play an important role in species-specific development in plants. However, the detailed miRNA profile divergence has not been performed among tomato species. In this study, the small RNA （sRNA） profiles of solanum lycopersicum cultivar 9706 and solanum habrochaites species PI 134417 were obtained by deep sequencing. Sixty-three known miRNA families were identified from these two species, of which 39 were common. Further miRNA profile comparison showed that 24 known non-conserved miRNA families were species-specific between these two tomato species. In addition, six conserved miRNA families displayed an apparent divergent expression pattern between the two tomato species. Our results suggested that species-specific, non-conserved miRNAs and divergent expression of conserved miRNAs might contribute to developmental changes and phenotypic variation between the two tomato species. Twenty new miRNAs were also identified in S. lycopersicum. This research significantly increases the number of known miRNA families in tomato and provides the first set of small RNAs in S. habrochaites. It also suggests that miRNAs have an important role in species-specific plant developmental regulation.

关键词： microRNAs solanum lycopersicum solanum habrochaites deep sequencing

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Haploid Induction via In vitro Gynogenesis in Tomato(solanum lycopersicum L.)

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Journal of Integrative Agriculture 2014年第10期13卷 2122-2131页

作者： ZHAO He WANG Xiao-xuan DU Yong-chen ZHU De-wei GUO Yan-mei GAO Jian-chang LI Fei John C Snyder Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences Department of Horticulture University of Kentucky

In order to determine the potential for haploid induction via in vitro gynogenesis in tomato, the ovules and protoplasts of embryo sacs from the hybrids Zhongza 101 and Zhongza 105 were cultured. An efficient method of ovule isolation was established in this study. Using this method, 100-150 ovules could be isolated from one ovary. Isolated ovules were cultured on three induction media to induce gynogenesis in vitro. During culture, ovules were enlarged markedly, with opaque white color. When observed microscopically, there were cell divisions and cell clumps in embryo sacs. Subsequently, the cell clumps in embryo sacs ceased growth, likely because the integument grew faster than embryo sacs did and hindered the fiarther development of embryo sacs. Therefore, subsequent callus morphogenesis might be originated from the integument. Thousands ofcalli from the two tomato varieties were obtained. Five diploid plants were regenerated after 15 months of subculturing. To eliminate the hindering effect of integument on embryo sac cells, the protoplasts of embryo sacs were prepared and cultured. After 48 hours of culture, the protoplasts of embryo sacs doubled in size and gradually formed clusters of cells. These results suggested that gynogenesis might be a potential way for haploid induction in tomato.

关键词： solanum lycopersicum ovule protoplast of embryo sac macrospore in vitro gynogenesis haploid

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Physiological response and phenolic metabolism in tomato (solanum lycopersicum) mediated by silicon under Ralstonia solanacearum infection

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Journal of Integrative Agriculture 2018年第10期17卷 2160-2171页

作者： FAN Xue-ying LIN Wei-peng LIU Rui JIANG Ni-hao CAI Kun-zheng College of Natural Resources and Environment/Key Laboratory of Tropical Agro-environment Ministry of Agriculture South China Agricultural University Laboratory of Ecotoxicity and Environmental Safety Guangdong Detection Center of Microbiology Guangdong Institute of Microbiology Tea Research Institute Guangdong Academy of Agricultural Sciences

Bacterial wilt, caused by Ralstonia solanacearum（Rs） is a serious soil-borne disease and silicon can enhance tomato resistance against this disease. However, few studies have focused on the mechanisms of Si-mediated pathogen resistance from the rhizosphere perspective. In this study, two tomato genotypes, HYT（susceptible） and H7996（resistant）, were used to investigate the effects of silicon application on disease inhibition, root growth, and organic acid content in both roots and root exudates under R. solanacearum infection. The results showed that Si application significantly suppressed bacterial wilt in HYT, but had no effect in H7996. Silicon concentrations in roots, stems and leaves of tomato were significantly increased by Si treatment under R. solanacearum inoculation. In HYT, Si application increased root dry weight by 22.8-51.6% and leaf photosynthesis by 30.6-208.0%, and reduced the concentrations of citric acid in root exudates by 71.4% and in roots by 83.5%. However, organic acids did not influence R. solanacearum growth. Results also demonstrated that salicylic acid（SA） content in roots was significantly increased by silicon addition for H7996 and exogenous SA application could reduce bacterial wilt disease index. Collectively, these results suggest that Si-modulated phenolic compound metabolism in roots or root exudates, especially citric acid and SA, may be a potential mechanism in the amelioration of bacterial wilt disease by Si.

关键词： silicon root root exudates solanum lycopersicum Ralstonia solanacearum organic acids

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Malus domestica and solanum lycopersicum Mixtures for the Synthesis of Graphene Silver and Zinc Oxide Nanocomposites

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Journal of Surface Engineered Materials and Advanced Technology 2022年第4期12卷 61-81页

作者： Rachel Fanelwa Ajayi Siphokazi Tshoko Candice Franke Nokwanda Ngema Veli Thipe Takalani Mulaudzi SensorLab Department of Chemistry University of the Western Cape Bellville South Africa Laboratório de Ecotoxicologia Centro de Química e Meio Ambiente Instituto de Pesquisas Energéticas e Nucleares (IPEN) Comiss&#227 o Nacional de Energia Nuclear (IPEN/CNEN-SP) S&#227 o Paulo Brazil Department of Biotechnology University of the Western Cape Bellville South Africa

This study reports on the novel and simple green method involving the use of apple (Malus domestica) and tomato (solanum lycopersicum) extracts in the synthesis of electroactive layers of silver nanoparticles|graphene oxide (AgNPs|GO) and zinc oxide nanoparticles|graphene oxide (ZnONPs|GO). The surface morphology of the green synthesized nanocomposites was studied using High-Resolution Transmission Electron Microscopy (HRTEM), High-Resolution Scanning Electron Microscopy (HRSEM) while the elemental analysis was studied using Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy and X-Ray diffraction (XRD) and their optical properties were further characterised using Ultraviolet Spectroscopy (UV-vis). The electrochemical studies of these nanocomposites were achieved using cyclic voltammetry (CV) where an increase in electron conductivity of the AgNPs|GO and ZnONPs|GO nanocomposite was observed. Comparatively, the silver nanoparticulate-based platforms were observed to have superior electrochemical properties as opposed to the zinc oxide-based platform. The observed electrochemical activities of the synthesized nanocomposites are a good indication of their suitability as electroactive platforms towards the development of electrochemical sensors. Electrochemical sensors are popular in the Electrochemistry field because they may be developed using different methods in order to suit their intended analytes. As such, the synthesis of a variety of electrochemical platforms provides researchers with a vast range of options to select from for the detection of analytes.

关键词： Zinc Oxide Electrochemical Sensors Silver Nanoparticles Graphene Oxide Nanocomposites Malus domestica solanum lycopersicum Electrochemistry

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Response to Inoculation with Arbuscular Mycorrhizal Fungi of Two Tomato (solanum lycopersicum L.) Varieties Subjected to Water Stress under Semi-Controlled Conditions

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Agricultural Sciences 2022年第12期13卷 790-819页

作者： Abdou Khadre Sané Bassirou Diallo Aboubacry Kane Mariama Ngom Maïmouna Cissoko Mame Ourèye Sy Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences et Techniques Université Cheikh Anta Diop de Dakar Dakar Sénégal Laboratoire Mixte International-Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LMI-LAPSE) IRD ISRA UCAD Dakar Sénégal Laboratoire National de Recherches sur les Productions Végétales (LNRPV) Unité de recherche en culture in vitro (URCI) Institut Sénégalais de Recherches Agricoles (ISRA) Dakar Sénégal Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD Centre de Recherche de Bel Air Dakar Senegal

In arid and semi-arid regions, the growth and development of cultivated plants, especially tomato (solanum lycopersicum L.), are severely limited by water deficit. Thus, to cope with this constraint, the plant establishes symbiotic relationships with arbuscular mycorrhizal fungi (AMF) in the soil whose extension of the hyphae allows a better and deeper exploration;this notably improves the hydromineral nutrition of the plant. Therefore, the choice of fungal partner becomes crucial for the establishment of a crop in water-deficient soil. In this context, the contribution of AMF to the water stress tolerance of two varieties of tomato plants was assessed under semi-controlled conditions. Parameters, such as the mycorrhizal frequency, intensity of mycorrhization, relative mycorrhizal dependency, growth, and biochemical parameters (carbon, nitrogen, phosphorus, and proline contents) of plants subjected to three levels of water stress (T100, T70, and T30), were evaluated. The highest frequencies and intensities of mycorrhization and relative mycorrhizal dependencies were obtained with plants of the Xewel variety inoculated with Rhizophagus fasciculatus (F: 95.24%, 88.35%, and 13.64%;M: 40.52%, 37.52%, and 11.22%;D: 23.7%, 54.4%, and 78.82%) and in those of the Lady Nema variety inoculated with Claroideoglomus etunicatum (F: 95.12%, 87.01%, and 15.25%;M: 40.66%, 37.99%, and 11.42%;D: 19.27%, 57.01%, and 70.98%), respectively at water regimes of T100, T70 and T30. These same symbiotic couples recorded, at T30, the best survival rates (+ 40%) and the higher aerial (77% and 74%) and root dry weights (80% and 59%). Plants of the Xewel variety inoculated with R. fasciculatus recorded the highest contents of carbon (T70: 30.59% and T30: 21.55%) and phosphorus (T70: 0.18% and T30: 0.17%). Plants of the Lady Nema variety recorded the highest nitrogen contents with 3.51% and 3.20%, respectively at T70 and T30. Plants of the Lady Nema variety, inoculated with C. etunicatum, also recorded the highest proline contents (572.25, 739

关键词： solanum lycopersicum Water Stress Arbuscular Mycorrhizal Fungi Growth Carbon Nitrogen Phosphorus Proline Tolerance

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Identification and Characterization of microRNA during Bemisia tabaci Infestations in solanum lycopersicum and solanum habrochaites

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Horticultural Plant Journal 2018年第2期4卷 62-72页

作者： WANG Ketao SU Xiaomei CUI Xia DU Yongchen ZHANG Shuaibin GAO Jianchang Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture Sino-Dutch Joint Laboratory of Horticultural GenomicsInstitute of Vegetables and FlowersChinese Academy of Agricultural Sciences College of Horticulture China Agricultural University

MicroRNAs(miRNAs) are a class of small non-coding RNAs that can regulate target gene expression during many plant growth and development processes. In recent years, several studies identified the miRNAs involved in fruit development, leaf development, and abiotic responses in tomato. However, little is known about the miRNAs that respond to insect attack. Here, miRNAs were identified by high-throughput sequencing at different stages after infections by the whitefly Bemisia tabaci in solanum lycopersicum and solanum habrochaites, which are susceptible and resistant to whitefly, respectively. A total of 44 known miRNA families were identified, and 33 were shared between the two species. Among these, 13 miRNA families were newly reported in tomato. After strict filtering, some novel miRNAs were also discovered. The global expression patterns of the miRNAs exhibited were different between the two species, reflecting their different responses and resistance levels to whitefly attack. Some of the predicted target genes of differentially expressed miRNAs may be involved in responding to, and defending against, diseases and insects. Thus, plant miRNAs are important in the responses to, and resistance against, insects and provide a useful resource for further investigations into the mechanism of miRNA-mediated plant–insect interactions.

关键词： solanum lycopersicum solanum habrochaites Bemisia tabaci miRNAs whitefly infection high-throughput sequencing

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Effects of solanum lycopersicum Rootstock Grafting on Tomato Resistance and Quality

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Agricultural Biotechnology 2018年第5期7卷 41-43,47页

作者： Guiyun GAN Kouhua YU Yaqin JIANG Yongcheng MO Wenjia LI Yongguan WU Yan LI Dexian KANG Yikui WANG Vegetable Research Institute Guangxi Academy of Agricultural SciencesNanning 530007China Guangxi Academy of Specialty Crops Guilin541004China

[Objectives] This experiment was carried out to explore the effects of solanum lycopersicum rootstock grafting on tomato resistance and quality. [Methods] 6 different S. lycopersicum rootstocks were used to graft ＇Guihong 2＇ tomato. The grafting affinity was better and the resistance to bacterial wilt was higher. [Results] S. lycopersicum rootstock grafting may reduce the tomato, but it can improve the taste and endogenous quality of tomato. Besides, soluble solids, soluble sugars, Vc content, and sugar-acid ratio were all significantly higher than that of the control group. [Conclusions] S. lycopersicum rootstock y11, 53, and 177 grafting can increase Vc, soluble solids, and sugar-acid ratio of tomato fruit, so they are optimal rootstocks for tomato grafting.

关键词： Tomato Grafting solanum lycopersicum Fruit quality

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G2-LIKE CAROTENOID REGULATOR(SlGCR)is a positive regulator of lutein biosynthesis in tomato

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aBIOTECH 2022年第4期3卷 267-280页

作者： Siyan Ren Yong Yuan Hsihua Wang Yang Zhang Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu610064China Sanya Institute of China Agricultural University Sanya572025China Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural UniversityBeijing100193China

Lutein is an oxygen-containing carotenoid synthesized in plant chloroplasts and chromoplasts.It plays an indispensable role in promoting plant growth and maintaining eye health in humans.The rate-limiting step of lutein biosynthesis is catalyzed by the lycopeneε-cyclase enzyme(LCYE).Although great progress has been made in the identification of transcription factors involved in the lutein biosynthetic pathway,many systematic molecular mechanisms remain to be elucidated.Here,using co-expression analysis,we identified a gene,G2-LIKE CAROTENOID REGULATOR(SlGCR),encoding a GARP G2-like transcription factor,as the potential regulator of SlLCYE in tomato.Silencing of SlGCR reduced the expression of carotenoid biosynthetic genes and the accumulation of carotenoids in tomato leaves.By contrast,overexpression of SlGCR in tomato fruit significantly increased the expression of relevant genes and enhanced the accumulation of carotenoids.SlGCR can directly bind to the SlLCYE promoter and activate its expression.In addition,we also discovered that expression of SlGCR was negatively regulated by the master regulator SlRIN,thereby inhibiting lutein synthesis during tomato fruit ripening.Taken together,we identified SlGCR as a novel regulator involved in tomato lutein biosynthesis,elucidated the regulatory mechanism,and provided a potential tool for tomato lutein metabolic engineering.

关键词： solanum lycopersicum GARP G2-like transcription factor Lutein biosynthesis

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