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Reactive oxygen species:Multidimensional regulators of plant adaptation to abiotic stress and development

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Journal of Integrative Plant Biology 2024年第3期66卷 330-367页

作者： Pengtao Wang Wen-Cheng Liu Chao Han Situ Wang Ming-Yi Bai Chun-Peng Song State Key Laboratory of crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China The Key Laboratory of Plant Development and Environmental Adaptation Biology Ministry of EducationSchool of Life SciencesShandong UniversityQingdao 266237China Faculty of science McGill UniversityMontreal H3B1X8Canada

Reactive oxygen species(ROS)are produced as undesirable by-products of metabolism in various cellular compartments,especially in response to unfavorable environmental conditions,throughout the life cycle of *** ROS production disrupts normal cellular function and leads to oxidative *** cope with excessive ROS,plants are equipped with a sophisticated antioxidative defense system consisting of enzymatic and non-enzymatic components that scavenge ROS or inhibit their harmful effects on ***,when maintained at relatively low levels,ROS act as signaling molecules that regulate plant growth,development,and adaptation to adverse ***,we provide an overview of current approaches for detecting *** also discuss recent advances in understanding ROS signaling,ROS metabolism,and the roles of ROS in plant growth and responses to various abiotic stresses.

关键词： abiotic stress growth and development plant reactive oxygen species

Genome-wide association mapping and genomic prediction of stalk rot in two mid-altitude tropical maize populations

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The crop Journal 2024年第2期12卷 558-568页

作者： Junqiao Song Angela Pacheco Amos Alakonya Andrea S.Cruz-Morales Carlos Muoz-Zavala Jingtao Qu Chunping Wang Xuecai Zhang Felix San Vicente Thanda Dhliwayo College of Agronomy Henan University of Science and TechnologyLuoyang 471000HenanChina International Maize and Wheat Improvement Center(CIMMYT) El BatanMexico Anyang Academy of Agricultural sciences Anyang 455000HenanChina CIMMYT-China Specialty Maize Research Center Crop Breedingand Cultivation Research InstituteShanghai Academy of Agricultural SciencesShanghai 201403China

Maize stalk rot reduces grain yield and *** about the genetics of resistance to maize stalk rot could help breeders design effective breeding strategies for the *** prediction may be a more effective breeding strategy for stalk-rot resistance than marker-assisted *** performed a genome-wide association study(GWAS)and genomic prediction of resistance in testcross hybrids of 677 inbred lines from the Tuxpe?o and non-Tuxpe?o heterotic pools grown in three environments and genotyped with 200,681 single-nucleotide polymorphisms(SNPs).Eighteen SNPs associated with stalk rot shared genomic regions with gene families previously associated with plant biotic and abiotic *** favorable SNP haplotypes traced to tropical than to temperate progenitors of the inbred *** genotype-by-environment(G×E)interaction increased genomic prediction accuracy.

关键词： Maize stalk rot Genome-wide association mapping Haplotype analysis Genomic prediction G×E interaction

The new kid on the block in insect pest management:sprayable RNAi goes commercial

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science China(Life sciences) 2024年第8期67卷 1766-1768页

作者： Junjie Yan Ralf Nauen Stuart Reitz Andrei Alyokhin Jiang Zhang David Mota-Sanchez Yonggyun Kim Subba Reddy Palli Silvia I.Rondon Brian A.Nault Juan Luis Jurat-Fuentes Michael S.Crossley William E.Snyder Angharad M.R.Gatehouse Myron P.Zalucki Bruce E.Tabashnik Yulin Gao State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China bayer AG Crop Science DivisionR&DPest ControlMonheim 40789Germany Department of crop and Soil science Oregon State UniversityOntario 97914USA School of Biology and Ecology University of MaineOrono 04469USA Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518000China Department of Entomology Michigan State UniversityEast Lansing 48864USA Department of Plant Medicals Andong National UniversityAndong 36729Republic of Korea Department of Entomology University of KentuckyLexington 40503USA Oregon State University Oregon Integrated Pest Management CenterCorvallis 97838USA Department of Entomology Cornell UniversityCornell AgriTechGeneva 14456USA Department of Entomology and Plant Pathology University of TennesseeKnoxville 37996USA Department of Entomology and Wildlife Ecology University of DelawareNewark 19716USA Department of Entomology University of GeorgiaAthensGeorgia 30602USA School of Natural and Environmental sciences Newcastle UniversityNewcastle upon TyneNE17RUUK School of the Environment University of QueenslandBrisbane 4072Australia Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management College of Plant Health and MedicineQingdao Agricultural UniversityQingdao 266109China Department of Entomology University of ArizonaTucson 85721USA National Center of Excellence for Tuber and Root crop Research Chinese Academy of Agricultural SciencesBeijing 100081China

Insect pest damage to crops is a threat to global food security(Tilman et al.,2011).Climate change,the evolution of insecticide resistance,and the phasing out of insecticides due to environmental and safety concerns exacerbate this *** urgently need safe and effective crop protection tools to sustainably generate yields that meet ever-increasing global demand.

关键词： crops damage pest

Interactive effects of soils,local environmental conditions and herbivores on secondary chemicals in tallow tree

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Journal of Plant Ecology 2024年第4期17卷 167-180页

作者： Li Xiao Wei Huang Juli Carrillo Jianqing Ding Evan Siemann College of Life and Environmental science Central South University of Forestry and TechnologyChangsha 410004China National Engineering Laboratory of Applied Technology for Forestry&Ecology in Southern China Central South University of Forestry and TechnologyChangsha 410004China CAS Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China Faculty of Land and Food Systems Centre for Sustainable Food SystemsBiodiversity Research CentreUniversity of British ColumbiaVancouver V6T 1Z4Canada State Key Laboratory of crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Biosciences Department Rice UniversityHoustonTX 77005USA

Plants produce secondary chemicals that may vary along with latitude due to changing abiotic and biotic stress gradients and local environmental *** apart the individual and combined effects of these different abiotic,such as soil nutrients,and biotic factors,such as soil biota and herbivores,on secondary chemicals is critical for understanding plant responses to changing *** conducted an experiment at different latitudes in China,using tallow tree(Triadica sebifera)seedlings sourced from a population at 31°*** seedlings were cultivated in gardens located at low,middle and high latitudes,with either local soil or soil from the original seed collection site(origin soil).The seedlings were exposed to natural levels of aboveground herbivores or had them *** secondary chemicals(both foliar and root),aboveground herbivores and soil characteristics were *** showed that most leaf and root secondary metabolites depended on the interaction of the experimental site and soil *** and root phenolic and tannin concentrations were higher at the middle latitude site,especially in the origin *** and foliar flavonoid concentrations increased when aboveground herbivores were *** communities depended strongly on soil *** different responses of tannins versus flavonoids suggest that these two chemical classes differ in their responses to the varying abiotic and biotic factors in these sites along *** together,our results emphasize the importance of considering the interactive effects of local environmental conditions,soil properties and herbivory in regulating plant chemical defenses.

关键词： phenolics tannins flavonoids abiotic factors soil characteristics Triadica sebifera

Screening of tall fescue genotypes for relative water content and osmotic potential under drought stress

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Grassland Research 2022年第2期1卷 84-93页

作者： Francis M.Kirigwi Malay C.Saha The Noble Research Institute ArdmoreOklahomaUSA bayer crop science WinnipegManitobaCanada

Background:Tall fescue(Festuca arundinacea Schreb.)is an important coolseason perennial *** persistence and forage yield can be severely affected by drought stresses during the hot,dry summers of the southern ***:One thousand tall fescue genotypes were evaluated in the greenhouse for high relative water content(RWC)and low cell sap osmotic potential(OP).Fifty contrasting genotypes for the two traits were identified and used in further greenhouse and field *** genotypes were also screened with 30%*** and shoot characteristics were studied in 10 ***:The genotypes differed for RWC(33.7%–97.3%,mean:79.7%)and had an almost fivefold difference in OP(−0.5 to−2.4 MPa,mean:−1.2 MPa).Significant variation(p<0.001)for the main effects of environment and genotypes was found for RWC and *** from the greenhouse trial,no correlation was found between RWC and OP,indicating that differences in RWC might have been due to factors other than osmotic *** with either long roots or high root weights,and high root/shoot ratios demonstrated high RWC and low ***:Genotypes with consistently high RWC and low OP were identified and used for the development of mapping populations and transcriptome studies.

关键词： drought tolerance osmotic potential relative water content root/shoot ratio tall fescue

Degradation and resynthesis of chlorophyll during increased oxidative stress and prolonged darkness differ between annual and perennial flax(Linum L.)

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Oil crop science 2024年第2期9卷 121-130页

作者： Kenyon J. Nisbett Abida Alokozai Su Hyun Elizabeth Ko G. Adam Mott Jason C.L. Browna Department of Biological sciences University of Toronto ScarboroughTorontoONCanada Department of Cell&Systems Biology University of TorontoTorontoONCanada Centre for the Analysis of Genome Evolution&Function University of TorontoTorontoONCanada

Among plants,there is considerable variation in lifespan:annuals live less than one year,whereas perennials live for several years,with the longest-living perennial having survived 43,600 *** proposed by the Disposable Soma Theory,this lifespan variation among plants likely reflects differential investment of limited energy and nutrient resources,with perennials investing more energy and nutrients into biomolecular maintenance compared to annuals in order to ensure persistence over multiple *** differential investment may be particularly important during periods of exogenous stress,which are known to accelerate biomolecular *** present study evaluated this hypothesis using annual and perennial flax(Linum L.)subjected to two exogenous stressors—increased oxidative stress(i.e.,foliar H2O2spraying)and complete prolonged *** chlorophyll has been shown to exhibit degradation in response to changes in environmental conditions,we utilized changes in chlorophyll levels during and after periods of exogenous stress to evaluate our *** predicted that i)perennials would exhibit a slower rate of chlorophyll degradation during exposure to exogenous stressors compared to annuals,and ii)perennials would exhibit a faster rate of chlorophyll resynthesis following such exposure compared to *** levels before,during,and after exposure to both exogenous stressors were measured in two separate trails,once using image colour analysis and once using *** chlorophyll degradation rates in response to oxidative stress did not differ between annuals and perennials,contrary to our predictions,chlorophyll resynthesis rates following such exposure were significantly higher in perennials,as *** plants were subjected to complete prolonged darkness,chlorophyll degradation rates were significantly lower in perennials than annuals,as predicted;however,when plants were subsequently reintroduced to natural photoperiod,ch

关键词： Ageing Life history Maximum lifespan Oxidative stress Somatic maintenance

氮添加对内蒙古草原植物地上和地下碳氮磷化学计量学特征的影响

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Journal of Plant Ecology 2024年第1期17卷 57-67页

作者： Ziqi Wang Jie Wang Honghui Wu Tian Yang Yixin An Yunlong Zhang Jianlin Bian Ying Li Haiyan Ren Ariuntsetseg Lkhagva Xu Wang Qiang Yu School of Grassland science Beijing Forestry UniversityBeijing 100083China National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Ministry of Agriculture Key Laboratory of crop Nutrition and Fertilization Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Department of Biology University of Western OntarioLondonONCanada College of Grassland science and Technology China Agricultural UniversityBeijing 100083China College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China College of Agro-grassland science Nanjing Agricultural UniversityNanjing 210095China Department of Biology School of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia

氮沉降对生态系统功能和过程具有显著影响。已有研究表明氮添加会影响植物叶片C:N:P化学计量特征。然而,氮添加对植物根系C:N:P化学计量特征影响的研究罕有报道。本论文的主要目的是对比氮添加对草原植物群落地上和地下C:N:P化学计量特... 详细信息

氮沉降对生态系统功能和过程具有显著影响。已有研究表明氮添加会影响植物叶片C:N:P化学计量特征。然而,氮添加对植物根系C:N:P化学计量特征影响的研究罕有报道。本论文的主要目的是对比氮添加对草原植物群落地上和地下C:N:P化学计量特征的影响。我们在内蒙古锡林郭勒草原开展了一个7年的氮添加实验,该实验包括6个处理,分别是对照:control;N1:0.4 mol·m-2 N;N2:0.8 mol·m^(-2) N;N3:1.6 mol·m^(-2) N;N4:2.8 mol·m^(-2) N;N5:4 mol·m^(-2) N,每个处理6次重复。我们测量并分析了植物地上、地下生物量和C:N:P化学计量特征。研究结果表明,氮添加会导致植物群落地上部分碳浓度降低,氮浓度和磷浓度升高,C:N和C:P比值降低,N:P升高,而且地上碳、氮、磷库均因施氮而增加。然而,氮添加对0-10,10-30,30-50和50-100 cm 4个土层的地下部分碳、氮、磷浓度、比例、库和化学计量特征没有显著影响。综上所述,氮添加会显著改变植物群落地上部分C:N:P化学计量特征,进而影响草地生态系统的功能和过程,但对地下C:N:P化学计量特征几乎没有影响。

关键词：氮沉降 C:N:P 化学计量草地生态系统群落地下

Relative fitness of susceptible and Cry1A.105/Cry2Ab2-single-/dual-protein-resistant Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) on non-Bt diet and a diet containing a low concentration of two proteins

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Insect science 2023年第2期30卷 398-410页

作者： Shucong Lin Graham Head Paula Price Ying Niu Fangneng Huang Department of Entomology Louisiana State University Agricultural CenterBaton RougeLouisianaUSA bayer crop science ChesterfieldMissouriUSA

Helicoverpa zea(Boddie)is a destructive agricultural pest species that is targeted by both Bacillus thuringiensis(Bt)maize and cotton in the United ***1A.105 and Cry2Ab2 are two Bt proteins expressed in a widely planted maize event MON *** this study,two tests(Test-Ⅰ and Test-Ⅱ)were conducted to evaluate the relative fitness of Bt-susceptible and-resistant *** on non-Bt diet(Test-Ⅰ and Test-Ⅱ)and a diet containing a mix of Cry1A.105 and Cry2Ab2 at a low concentration(Test-Ⅱ only).Insect populations evaluated in Test-Ⅰ were two Bt-susceptible strains and three Bt-resistant strains(a single-protein Cry1A.105-,a single-protein Cry2Ab2-,and a dual-protein Cry1A.105/Cry2Ab2-resistant strains).Test-Ⅱ analyzed the same two susceptible strains,three backcrossed-and-reselected Cry1A.105/Cry2Ab2-single-/dual-protein-resistant strains,and three F1 heterozygous *** of life table parameters showed that neither the single-nor dual-protein Cry1A.105/Cry2Ab2 resistance in *** was associated with fitness costs under the test *** single Cry protein resistances at a concentration of a mix of Cry1A.105 and Cry2Ab2 that resulted in a zero net reproductive rate for the two susceptible strains were functionally incomplete recessive or codominant,and the dual-protein resistance was completely *** lack of fitness costs could be a factor contributing to the rapid revolution of resistance to the Cry proteins in this *** generated from this study should aid our understanding of Cry protein resistance evolution and help in refining IRM programs for ***.

关键词： resistance management Cry1A.105 Cry2Ab2 fitness costs Helicoverpa zea low dose effect

Status of Cry1Ac and Cry2Ab2 resistance in field populations of Helicoverpa zea in Texas, USA

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Insect science 2022年第2期29卷 487-495页

作者： JoséC.Santiago González David L.Kerns Graham P.Head Fei Yang Department of Entomology Texas A&M UniversityCollege StationTexasUSA bayer crop science St.LouisMissouriUSA

Helicoverpa zea is a major target pest of Bt corn and Bt ***-evolved resistance of *** to Cry1 and Cry2 proteins has been widely reported in the United *** the frequency of resistance alleles in a target insect is critical for Bt resistance *** multiple cases of practical resistance to Cry proteins having been documented in ***,there are no data on the current status of alleles conferring resistance to Cry1Ac and Cry2Ab2 in field populations of this *** 2018‒2019,a total of 106 F2 families for Cry1Ac and 120 F2 families for Cry2Ab2 were established using mass mating and light trap *** screened 13,568 and 15,360 neonates using a discriminatory dose of Cry1Ac and Cry2Ab2,*** results showed that 93.4%and 35.0%of the F2 families could survive on the discriminatory dose of Cry1Ac and Cry2Ab2,*** estimated resistance allele frequency for Cry1Ac in *** ranged from 0.4150 to 0.4975 and for Cry2Ab2 ranged from 0.1097 and *** data indicate that the frequency of alleles conferring resistance to Cry1 and Cry2 proteins in *** in Texas are *** addition,our data suggest the resistance to Cry1Ac and Cry2Ab2 in the screened families of *** varies from recessive to *** information in this study provides precise estimates of Cry resistance allele frequencies in *** and increases our understanding of the risks to the sustainability of Bt crops.

关键词： allele frequency Bacillus thuringiensis CrylAc Cry2Ab2 Helicoverpa zea resistance