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The critical role of autophagy in plant responses to abiotic stresses

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Frontiers of Agricultural Science and Engineering 2017年第1期4卷 28-36页

作者： yu WANG Jie ZHOU Jingquan Yu College of Agriculture and Biotechnology Zhejiang University Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Key Laboratory of Horticultural Plants Growth Development and Quality Improvement Ministry of Agriculture

Autophagy is an evolutionary conserved recycling process in eukaryotes whereby intracellular components are engulfed by autophagosomes, which are subsequently transferred to the vacuoles for further degradation and reuse. In organisms like yeast and metazoans, autophagy is actively engaged during environmental perturbation either by degrading denatured proteins and organelles or by interfacing with stress related signaling molecules. Studies over the last decade have also revealed numerous important mechanisms where autophagy is widely involved in plant abiotic stress responses. Autophagy serves as a pivotal route for nutrient remobilization by the degradation of superfluous or damaged cellular cytoplasmic material and organelles. It is also reported to regulate the accumulation of reactive oxygen species, to maintain the cellular redox balance of plants under stressful conditions. Furthermore, autophagy is essential in regulating cellular toxicity by removing aggregated and/or denatured proteins and thereby improving plant stress tolerance. In this review, recent advances in our understanding of autophagy, along with pathways and regulatory networks through which it influences many aspects of plant growth and development in response to nutrient starvation, oxidative stress, osmotic stress and extreme temperatures are discussed.

关键词： abiotic stresses autophagy extreme temperature nutrient starvation osmotic stress oxidative stress

CHARACTERISTICS OF HERBIVORY/WOUND-ELICITED ELECTRICAL SIGNAL TRANSDUCTION IN TOMATO

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Frontiers of Agricultural Science and Engineering 2021年第2期8卷 292-301页

作者： Chaoyi HU Siqi DUAN Jie ZHOU Jingquan Yu Department of Horticulture Zijingang CampusZhejiang UniversityHangzhou 310058China Key Laboratory of Horticultural Plant Growth and Development Ministry of Agriculture and Rural Affairs of ChinaHangzhou 310058China.

Electrical signals commonly occur in plants in response to various environmental changes and have a dominant function in plant acclimation.The transduction of wound-elicited electrical signals in the model plant spedes Arabidopsis has been characterized but the characteristics of electrical signal transduction in response to herbivory or wounding in crop species remain unknown.Here,the features of electrical signals elicited by insect herbivory and wounding in tomato were investigated.Unlike those in Arabidopsis,wounding tomato leaves did not cause leaf-to-leaf electrical signal transduction.In contrast,electrical signals elicited in response to petiole wounding were stronger and more strongly transduced.Leaflet wounding also activated electrical signal transduction and jasmonic acid(JA)signaling within the whole compound leaf.It was also demonstrated that tomato glutamate receptor-like 3.3(GLR3.3)and GLR3.5 mediated leaflet-to-leaflet electrical signal transduction.Herbivory-induced JA accumulation and Helicoverpa armigera resistance were reduced in glr3.3/3.5 plants.This work reveals the nature of electrical signal transduction in tomato and emphasizes the key roles of GLR3.3 and GLR3.5 in electrical signal transduction and JA signaling activation.

关键词： electrical signal glutamate receptor-like herbivory jasmonic acid tomato

Mitochondrial retrograde regulation tuning fork in nuclear genes expressions of higher plants

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Journal of Genetics and Genomics 2008年第2期35卷 65-71页

作者： Jinghua Yang Mingfang Zhang Jingquan Yu Laboratory of Genetic Resources ＆ Functional Improvement for Horticultural Plants Department of Horticulture Zhejiang University Hangzhou 310029 China Laboratory of Horticultural Plant Growth Development ＆ Biotechnology Ministry ofAgriculture Zhejiang University Hangzhou 310029 China

In plant cells, there are three organelles： the nucleus, chloroplast, and mitochondria that store genetic information. The nucleus possesses the majority of genetic information and controls most aspects of organelles gene expression, growth, and development. In return, organelles also send signals back to regulate nuclear gene expression, a process defmed as retrograde regulation. The best studies of organelles to nucleus retrograde regulation exist in plant chloroplast-to-nuclear regulation and yeast mitochondria-to-nuclear regulation. In this review, we summarize the recent understanding of mitochondrial retrograde regulation in higher plant, which involves multiple potential signaling pathway in relation to cytoplasmic male-sterility, biotic stress, and abiotic stress. With respect to mitochondrial retrograde regulation signal pathways involved in cytoplasmic male-sterility, we consider that nuclear transcriptional factor genes are the targeted genes regulated by mitochondria to determine the abnormal reproductive development, and the MAPK signaling pathway may be involved in this regulation in Brassica juncea. When plants suffer biotic and abiotic stress, plant ceils will initiate cell death or other events directed toward recovering from stress. During this process, we propose that mitochondria may determine how plant cell responds to a given stress through retrograde regulation. Meanwhile, several transducer molecules have also been discussed here. In particular, the Paepe research group reported that leaf mitochondrial modulated whole cell redox homeostasis, set antioxidant capacity, and determined stress resistance through altered signaling and diurnal regulation, which is an indication of plant mitochondria with more active function than ever.

关键词： mitochondrial retrograde regulation cytoplasmic male sterility biotic stress abiotic stress

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

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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

Transcriptomic and genetic approaches reveal an essential role of the NAC transcription factor SlNAP1 in the growth and defense response of tomato

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Horticulture Research 2020年第1期7卷 29-39页

作者： Jiao Wang Chenfei Zheng Xiangqi Shao Zhangjian Hu Jianxin Li Ping Wang Anran Wang Jingquan Yu Kai Shi Department of Horticulture Zhejiang University866 Yuhangtang Road310058 HangzhouPeople’s Republic of China

With global climate change,plants are frequently being exposed to various stresses,such as pathogen attack,drought,and extreme temperatures.Transcription factors(TFs)play crucial roles in numerous plant biological processes;however,the functions of many tomato(Solanum lycopersicum L.)TFs that regulate plant responses to multiple stresses are largely unknown.Here,using an RNA-seq approach,we identified SlNAP1,a NAC TF-encoding gene,which was strongly induced by various stresses.By generating SlNAP1 transgenic lines and evaluating their responses to biotic and abiotic stresses in tomato,we found that SlNAP1-overexpressing plants showed significantly enhanced defense against two widespread bacterial diseases,leaf speck disease,caused by Pseudomonas syringae pv.tomato(Pst)DC3000,and root-borne bacterial wilt disease,caused by Ralstonia solanacearum.In addition,SlNAP1 overexpression dramatically improved drought tolerance in tomato.Although the SlNAP1-overexpressing plants were shorter than the wild-type plants during the early vegetative stage,eventually,their fruit yield increased by 10.7%.Analysis of different hormone contents revealed a reduced level of physiologically active gibberellins(GAs)and an increased level of salicylic acid(SA)and abscisic acid(ABA)in the SlNAP1-overexpressing plants.Moreover,EMSAs and ChIP-qPCR assays showed that SlNAP1 directly activated the transcription of multiple genes involved in GA deactivation and both SA and ABA biosynthesis.Our findings reveal that SlNAP1 is a positive regulator of the tomato defense response against multiple stresses and thus may be a potential breeding target for improving crop yield and stress resistance.

关键词： breeding drought eventually

HIGHLIGHTS OF THE SPECIAL ISSUE ON"HORTICULTURE RESEARCH FOR GREEN AND SUSTAINABLE DEVELOPMENT"

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Frontiers of Agricultural Science and Engineering 2021年第2期8卷 193-195页

作者： Xiuxin DENG yujin HAO Jingquan Yu Qixiang ZHANG Zhonghua LIU Key Laboratory of Horticultural Plant Biology(Ministry of Education) Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Crop Biology Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and EfficiencyCollege of Horticultural Science and EngineeringShandong Agricultural UniversityTai'an 271018China Department of Horticulture Zijingang CampusZhejiang UniversityHangzhou 310058China Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Forestry UniversityBeijing 100083China Key Laboratory of Tea Science of Ministry of Education Hunan Agricultural UniversityChangsha 410000China.

Horticulture is the science and technology of intensively cultivating plants for food,comfort and beautification purposes.Horticulture comprises a wide range of plants and crops including fruit and nut trees,vegetables,edible fungi,and ornamental plants,as well as tea plants also categorized as horticultural crops in some countries including China.Horticultural products are of great value and serve as important dietary sources of antioxidants,vitamins and mineral nutrients for human nutrition and health.Development of a green and sustainable horticulture,producing more and safer fruit and vegetables,is a prerequisite for meeting the ever-increasing demand of the growing human population.

关键词： culture crops SPEC

Impact of gravitation on gaseous pollutant source identification

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Chinese Journal of Aeronautics 2013年第2期26卷 261-268页

作者： Pang Liping Zhang yu Qu Hongquan Hu Tao Zhao jingquan School of Aviation Science and Engineering Beihang University College of Information Engineering North China University of Technology

It is necessary to identify a gaseous pollutant source rapidly so that prompt actions can be taken, but this is one of the difficulties in the inverse problem areas. In this paper, an approach to identifying a sudden continuous emission pollutant source based on single sensor information is developed to locate a source in an enclosed space with a steady velocity field. Because the gravity has a very important influence on the gaseous pollutant transport and the source identification, its influence is analyzed theoretically and a conclusion is drawn that the velocity of fluid is a key factor to effectively help weaken the gravitational influence. Further studies for a given 2-D case by using the computational fluid dynamics （CFD） method show that when the velocity of inlet is less than one certain value, the influence of gravity on the pollutant transport is very significant, which will change the velocity field obviously. In order to quantitatively judge the practical applicability of identification approach, a synergy degree of the velocity fields before and after a source appearing is proposed as a condition for considering the influence of gravity. An experimental device simulating pollutant transmission was set up and some experiments were conducted to verify the practical application of the above studies in the actual gravitational environment. The results show that the proposed approach can successfully locate the sudden constant source when the experimental situations meet the identified conditions.

关键词： Experiment Gaseous pollutant source identification Gravitational field Location probability Synergy degree of velocity fields Ventilated enclosed space

Scutellarin prevents acute alcohol-induced liver injury via inhibiting oxidative stress by regulating the Nrf2/HO-1 pathway and inhibiting inflammation by regulating the AKT,p38 MAPK/NF-κB pathways

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第7期24卷 617-631页

作者： Xiao ZHANG Zhicheng DONG Hui FAN Qiankun YANG Guili yu Enzhuang PAN Nana HE Xueqing LI Panpan ZHAO Mian FU jingquan DONG Jiangsu Key Laboratory of Marine Bioresources and Environment/Co-Innovation Center of Jiangsu Marine Bio-Industry Technology/Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening College of PharmacyJiangsu Ocean UniversityLianyungang 222005China Department of Oncology the Second People's Hospital of LianyungangLianyungang 222000China Institute of Neuroscience the First People's Hospital of LianyungangLianyungang 222000China

Alcoholic liver disease(ALD)is the most frequent liver disease worldwide,resulting in severe harm to personal health and posing a serious burden to public health.Based on the reported antioxidant and anti-inflammatory capacities of scutellarin(SCU),this study investigated its protective role in male BALB/c mice with acute alcoholic liver injury after oral administration(10,25,and 50 mg/kg).The results indicated that SCU could lessen serum alanine aminotransferase(ALT)and aspartate aminotransferase(AST)levels and improve the histopathological changes in acute alcoholic liver;it reduced alcohol-induced malondialdehyde(MDA)content and increased glutathione peroxidase(GSH-Px),catalase(CAT),and superoxide dismutase(SOD)activity.Furthermore,SCU decreased tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),and IL-1βmessenger RNA(mRNA)expression levels,weakened inducible nitric oxide synthase(iNOS)activity,and inhibited nucleotide-binding oligomerization domain(NOD)-like receptor protein 3(NLRP3)inflammasome activation.Mechanistically,SCU suppressed cytochrome P450 family 2 subfamily E member 1(CYP2E1)upregulation triggered by alcohol,increased the expression of oxidative stress-related nuclear factor erythroid 2-related factor 2(Nrf2)and heme oxygenase-1(HO-1)pathways,and suppressed the inflammation-related degradation of inhibitor of nuclear factor-κB(NF-κB)-α(IκBα)as well as activation of NF-κB by mediating the protein kinase B(AKT)and p38 mitogen-activated protein kinase(MAPK)pathways.These findings demonstrate that SCU protects against acute alcoholic liver injury via inhibiting oxidative stress by regulating the Nrf2/HO-1 pathway and suppressing inflammation by regulating the AKT,p38 MAPK/NF-κB pathways.

关键词： Scutellarin Oxidative stress Alcoholic liver disease Inflammation

Degradation of chlorpyrifos in laboratory soil and its impact on soil microbial functional diversity

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Journal of Environmental Sciences 2009年第3期21卷 380-386页

作者： FANG Hua yu yunlong CHU Xiaoqiang WANG Xiuguo YANG Xiaoe yu jingquan Department of Plant Protection College of Agriculture & Biotechnology Zhejiang University Hangzhou 310029 China MOE Key Lab of Environment Remediation & Ecosystem Health College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 China Department of Horticulture College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 China

Degradation of chlorpyrifos at different concentrations in soil and its impact on soil microbial functional diversity were investigated under laboratory condition. The degradation half-live of chlorpyrifos at levels of 4, 8, and 12 mg/kg in soil were calculated to be 14.3, 16.7, and 18.0 d, respectively. The Biolog study showed that the average well color development （AWCD） in soils was significantly （P 〈 0.05） inhibited by chlorpyrifos within the first two weeks and thereafter recovered to a similar level as the control. A similar variation in the diversity indices （Simpson index lID and McIntosh index U） was observed, but no significant difference among the values of the Shannon-Wiener index H＇ was found in chlorpyrifos-treated soils. With an increasing chlorpyrifos concentration, the half-life of chlorpyrifos was significantly （P ≤ 0.05） extended and its inhibitory effect on soil microorganisms was aggravated. It is concluded that chlorpyrifos residues in soil had a temporary or short-term inhibitory effect on soil microbial functional diversity.

关键词： Biolog chlorpyrifos community-level physiological profile microbial functional diversity