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Transcriptomics and physiological analyses reveal that sulfur alleviates mercury toxicity in rice(oryza sativa L.)

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Journal of Environmental Sciences 2024年第1期135卷 10-25页

作者： Yingmei Huang Jicai Yi Xiaomin Li Fangbai Li National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and ManagementInstitute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China College of Life Sciences South China Agricultural UniversityGuangzhou 510642China SCNU Environmental Research Institute Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China

Mercury(Hg)is one of the most dangerous contaminants and has sparked global concern since it poses a health risk to humans when consumed through ***(S)is a crucial component for plant growth,and S may reduce Hg accumulation in rice ***,the detailed effects of S and the mechanisms underlying S-mediated responses in Hg-stressed rice plants remain ***,to investigate the effects of S addition on rice growth,Hg accumulation,physiological indexes,and gene expression profiles,rice seedlings were hydroponically treated with Hg(20μmol/L Hg Cl_(2))and Hg plus elemental sulfur(100 mg/L).S application significantly reduced Hg accumulation in Hg-stressed rice roots and alleviated the inhibitory effects of Hg on rice growth.S addition significantly reduced Hg-induced reactive oxygen species generation,membrane lipid peroxidation levels,and activities of antioxidant enzymes while increasing glutathione content in *** analysis of roots identified 3,411,2,730,and 581 differentially expressed genes in the control(CK)***,CK ***+S,and Hg ***+S datasets,*** pathway of S-mediated biological metabolism fell into six groups:biosynthesis and metabolism,expression regulation,transport,stimulus response,oxidation reduction,and cell wall *** majority of biological process-related genes were upregulated under Hg stress compared with CK treatment,but downregulated in the Hg+S *** results provide transcriptomic and physiological evidence that S may be critical for plant Hg stress resistance and will help to develop strategies for reduction or phytoremediation of Hg contamination.

关键词： Sulfur Mercury Transcriptomics Detoxification

Cellular Cd^(2+)fluxes in roots confirm increased Cd availability to rice(oryza sativa L.)induced by soil acidifications

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Journal of Environmental Sciences 2024年第5期139卷 516-526页

作者： Xiaoyi Sun Meng Wang Luyao Qin Lei Yu Jing Wang Han Zheng Wenneng Zhou Shibao Chen State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China

Soil acidifications become one of the main causes restricting the sustainable development of agriculture and causing issues of agricultural product *** order to explore the effect of different acidification on soil cadmium(Cd)availability,soil pot culture and hydroponic(soil potting solution extraction)were applied,and non-invasive micro-test technique(NMT)was *** three different soil acidification processes were simulated,including direct acidification by adding sulfuric acid(AP1),acid rain acidification(AP2)by adding artificial simulated acid rain and excessive fertilization acidification by adding(NH_(4))_(2)SO_(4)(AP3).The results showed that for direct acidification(AP1),DTPA-Cd concentration in field soils in Liaoning(S1)and Zhejiang(S2)increased by 0.167-0.217 mg/kg and 0.181-0.346 mg/kg,respectively,compared with control *** soil pH decreased by 0.45 units in S1,the Cd content of rice stems,leaves and roots increased by 0.48 to 6.04 mg/kg and 2.58 to 12.84mg/kg,respectively,When the pH value of soil S1 and S2 decreased by 0.20 units,the average velocity of Cd^(2+)at 200μm increased by 10.03-33.11 pmol/cm~2/sec and 21.33-52.86pmol/cm^(2)/sec,respectively,and followed the order of AP3>AP2>*** summary,different acidification measures would improve the effectiveness of Cd,under the same pH reduction condition,fertilization acidification increased Cd availability most significantly.

关键词： Soil acidification Cadmium Non-invasive micro-test technique Bioavailability

Irrigation regimes modulate non-structural carbohydrate remobilization and improve grain filling in rice(oryza sativa L.)by regulating starch metabolism

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Journal of Integrative Agriculture 2024年第5期23卷 1507-1522页

作者： Yuguang Zang Gaozhao Wu Qiangqiang Li Yiwen Xu Mingming Xue Xingyu Chen Haiyan Wei Weiyang Zhang Hao Zhang Lijun Liu Zhiqin Wang Junfei Gu Jianchang Yang Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Agricultural College YangzhouUniversityYangzhou225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China

Recently developed ‘super’ rice cultivars with greater yield potentials often suffer from the problem of poor grain filling, especially in inferior spikelets. Here, we studied the activities of enzymes related to starch metabolism in rice stems and grains, and the microstructures related to carbohydrate accumulation and transportation to investigate the effects of different water regimes on grain filling. Two ‘super’ rice cultivars were grown under two irrigation regimes of well-watered(WW) and alternate wetting and moderate soil drying(AWMD). Compared with the WW treatment,the activities of ADP glucose pyrophosphorylase(AGPase), starch synthase(StSase) and starch branching enzyme(SBE), and the accumulation of non-structural carbohydrates(NSCs) in the stems before heading were significantly improved, and more starch granules were stored in the stems in the AWMD treatment. After heading, the activities of α-amylase, β-amylase, sucrose phosphate synthase(SPS) and sucrose synthase in the synthetic direction(SSs)were increased in the stems to promote the remobilization of NSCs for grain filling under AWMD. During grain filling, the enzymatic activities of sucrose synthase in the cleavage direction(SSc), AGPase, StSase and SBE in the inferior spikelets were increased, which promoted grain filling, especially for the inferior spikelets under ***, there were no significant differences in vascular microstructures. The grain yield and grain weight could be improved by 13.1 and 7.5%, respectively, by optimizing of the irrigation regime. We concluded that the low activities of key enzymes in carbon metabolism is the key limitation for the poor grain filling, as opposed to the vascular microstructures, and AWMD can increase the amount of NSC accumulation in the stems before heading, improve the utilization rate of NSCs after heading, and increase the grain filling, especially in the inferior spikelets, by altering the activities of key enzymes in carbon metabolism.

关键词： rice(oryza sativa L.) non-structural carbohydrates(NsCs) enzymatic activity grain illing starch granules vascular bundle

Gene expression profiles in early leaf of rice(oryza sativa)and foxtail millet(Setaria italica)

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The Crop Journal 2024年第3期12卷 776-787页

作者： Jing Sun Chen Deng Xiuru Dai Haoshu Li Liying Zhang Jingke Wang Hang Zhao Yirong Yang NghiVan Phung Zhiguo Zhang Pinghua Li Xuehui Sun Tiegang Lu Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China College of Agronomy Shandong Agricultural UniversityTai’an 271018ShandongChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101ShandongChina

Plant anatomy is patterned early during leaf development which suggests studying the spatial–temporal transcriptomes of primordia will help identify critical regulative and functional *** successfully isolated the leaf primordia tissues from the C3grass rice and the C4grass foxtail millet by laser capture microdissection(LCM)and studied the gene expression throughout leaf developmental *** data analysis uncovered the conserved expression patterns of certain gene clusters both in rice and foxtail millet during leaf *** revealed genes and transcription factors involved in vein formation,stomatal development,and suberin *** identified 79 candidate genes associated with functional regulation of C4anatomy *** phenotype of the candidate genes revealed that knock-out of a putative polar auxin transport related gene NAL1 resulted significantly reduced veinal space in rice *** present work provides a foundation for future analyses of genes with novel functions in grasses and their role in leaf development,in particular the role in leaves with a contrasting C3vs.C4biosynthetic pathway.

关键词： Rice Foxtail millet Leaf development RNA-seq LCM

Genetic Variability and Phenotypic Correlations Study among Grain Quality Traits and Mineral Elements Concentrations in Colored and Non-Colored Rice (oryza sativa L.)

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1733-1748页

作者： Adel A.Rezk Mohamed M.El-Malky Heba I.Mohamed Hossam S.El-Beltagi Agricultural Biotechnology Department College of Agricultural and Food ScienceKing Faisal UniversityAl-Ahsa31982Saudi Arabia Plant Pathology Research Institute Agriculture Research CenterGiza12619Egypt Rice Research and Training Center Field Crop Research InstituteAgriculture Research Center33717Egypt Biological and Geological Sciences Department Faculty of EducationAin Shams UniversityCairo11511Egypt Biochemistry Department Faculty of AgricultureCairo UniversityGiza12613Egypt

Twenty-four rice genotypes were examined to assess genetic variability,heritability,and correlations for seven-grain quality traits,eight nutritional elements,and *** revealed signiﬁcant differences for the quality traits *** every trait under study,the phenotypic coefﬁcient of variation was higher than the correspon-dence genotypic coefﬁcient of *** in a broad sense varied from 29.75%for grain length to 98.31%for the elongation *** percentage recovery had a highly signiﬁcant positive correlation with milling and head rice ***,milling percentage had a highly positive correlation with head rice *** amylose percentage,all the genotypes belonged to low amylose except the Hassawi-1 variety,which had intermediate amylose *** nutrition contents of magnesium(Mg),sodium(Na),potas-sium(K),calcium(Ca),copper(Cu),manganese(Mn),zinc(Zn),iron(Fe),or protein percentage gave different variations for 24 rice genotypes under all the nutritional *** the 24 genotypes,ten rice genotypes–HighNutrient-1,HighNutrient-2,HighNutrient-9,HighNutrient-8,HighNutrient-3,Hassawi-2,HighNutrient-7,HighNutrient-6,Hassawi-1,and HighNutrient-4–had the highest heist value for all nutritional and protein con-tents,and could be used as a donor to improving new *** was a positive and signiﬁcant correlation between magnesium Mg,K,Zn and ***,K had a positive correlation with zinc Zn,Fe,and protein *** analysis was divided into two groups:theﬁrst group included all genotypes rich in nutri-ents,while the remaining genotypes with low nutritional content were included in the second group.

关键词： Amylose cluster analysis genotypes grain quality mineral nutrition rice

Analysis of Intraspecies Diversity of Rice Reveals Variation Patterns of oryza sativa Basic Leucine Zippers

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Phyton-International Journal of Experimental Botany 2024年第5期93卷 859-873页

作者： Jing Wang Wenqing Xiao Qingnan Wang Xu Wang Bin Jiang Yangchun Han Yang Sun Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases Key Laboratory for Conservation and Use of Important Biological Resources of Anhui ProvinceCollege of Life SciencesAnhui Normal UniversityWuhu241000China Institute of Plant Protection Jiangsu Academy of Agricultural SciencesNanjing210000China

The basic leucine zipper(bZIP)is an important class of transcription factors in plants,playing a critical role in plant growth and development and responses to biotic and abiotic *** to gene presence/absence variations,it is limited to identify bZIP genes based on the reference ***,we performed the bZIP gene family analysis in the rice *** employing a rice pan-genome,ninety-four OsbZIPs(72 core genes and 22 variable genes)were identified and divided into 11 groups in a phylogenetic *** upon Ka/Ks values in 33 accessions,OsbZIPs were subjected to different selection pressures during *** analysis of the effects of structural variations(SVs)on gene expression,gene structure,and conserved domains showed that SVs could significantly alter the expression levels of certain OsbZIPs,leading to gene truncation and the emergence of numerous atypical ***-four differentially expressed OsbZIPs were identified by analyzing RNA-seq data of the Xanthomonas oryzae ***(Xoo)infection susceptible(IR24)and resistant(IRBB67)lines under high temperature,and by counting the number of differentially expressed OsbZIPs in different *** Osb-ZIPs were found to respond to Xoo infection at an early stage and may not be involved in the mechanism of Xa4 and Xa7 resistance to *** multiple variation patterns of OsbZIP genes provide new insights into the OsbZIP genes in *** results provide new resources and offer new directions for functional studies of OsbZIPs.

关键词： Rice OsbZIP pan-genome structure variation atypical gene bacterial blight

Nutritional and Sensory Properties of Penne-Type Pasta Based on Cereals (oryza sativa (L.), Digitaria exilis, Pennicetum glaucum), Tubers (Ipomoea batata, Manihot esculenta Crantz), and a Legume (Vigna unguiculata (L.))

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Food and Nutrition Sciences 2024年第5期15卷 351-360页

作者： Maurice Jean François Sylvestre Lopy Ndèye Fatou Ndiaye Malick Mbengue Mamadou Salif Sow Abdou Diouf Department of Cereals and Legumes Institute of Food Technology (ITA) Dakar Senegal Polytechnic School Cheikh Anta Diop University Dakar Senegal

This study aimed to evaluate the nutritional and sensory characteristics of penne-type pasta produced from locally sourced cereals, tubers, and legumes. To achieve this, we formulated four different types of pasta with varying levels of incorporation ranging from 10 to 50% cereals such as millet, fonio, and rice, tubers such as manioc and sweet potato, and legumes such as cowpea. The results showed that the incorporation of local products considerably improved the nutrient content of penne without being rejected by consumers. Sensory analysis showed that the best results were obtained with mixtures of sweet potato, cowpea, and wheat, as well as with rice, manioc, cowpea, and sample wheat. These results are of great importance to manufacturers in a world where developing nutritious and attractive food products is a crucial challenge.

关键词： Pasta Tubers Cereals Legumes

Structural insight into chitin perception by chitin elicitor receptor kinase 1 of oryza sativa

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Journal of Integrative Plant Biology 2023年第1期65卷 235-248页

作者： Li Xu Jizong Wang Yu Xiao Zhifu Han Jijie Chai Tsinghua-Peking Center for Life Sciences Beijing Advanced Innovation Center for Structural BiologyCentre for Plant Biology School of Life Sciences Tsinghua UniversityBeijing 100084 China Max Planck Institute for Plant Breeding Research Cologne 50829 Germany Institute of Biochemistry University of Cologne Cologne 50674 Germany Cluster of Excellence in Plant Sciences(CEPLAS) Düsseldorf 40225 Germany

Plants have developed innate immune systems to fight against pathogenic fungi by monitoring pathogenic signals known as pathogen-associated molecular patterns(PAMP)and have established endo symbiosis with arbuscular mycorrhizal(AM)fungi through recognition of mycorrhizal(Myc)*** elicitor receptor kinase 1 of oryza sativa ***(OsC ERK1)plays a bifunctional role in mediating both chitin-triggered immunity and symbiotic relationships with AM ***,it remains unclear whether OsC ERK1 can directly recognize chitin *** this study,we show that OsC ERK1 binds to the chitin hexamer((NAG)6)and tetramer((NAG)4)directly and determine the crystal structure of the OsC ERK1-(NAG)6complex at 2?.The structure shows that one OsC ERK1 is associated with one(NAG)*** recognition,chitin hexamer binds OsC ERK1 by interacting with the shallow groove on the surface of LysM *** structural findings,complemented by mutational analyses,demonstrate that LysM 2 is crucial for recognition of both(NAG)6and(NAG)***,these findings provide structural insights into the ability of OsC ERK1 in chitin perception,which will lead to a better understanding of the role of OsCERK1 in mediating both immunity and symbiosis in rice.

关键词： chitin immune response OsCERK1 recognition mechanism symbiotic reaction

Current insights on rice(oryza sativa L.)bakanae disease and exploration of its management strategies

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第9期24卷 755-778页

作者： Chinnannan KARTHIK Qingyao SHU Hainan Institute Zhejiang UniversityYazhou Bay Science and Technology CitySanya572025China Department of Biology Gus R.Douglass InstituteWest Virginia State UniversityInstituteWV25112USA National Key Laboratory of Rice Biology and Breeding/The Advanced Seed Institute Zhejiang UniversityHangzhou310058China

Bakanae is an emerging rice disease caused by the seed-and soil-borne pathogen Fusarium *** is becoming a more serious threat to sustainable rice production throughout rice-growing *** disease infection is responsible for high yield losses ranging from 3%to 95%,and disease incidence varies based on the region and ***,understanding the nature of the pathogen,its pathogenicity,disease epidemiology,symptoms,host–pathogen interaction,and the role of secondary metabolites in the disease cycle will be helpful in the development of effective and sustainable management ***,very few comprehensive studies have described the details of rice bakanae ***,in this review we summarize and discuss in detail the information available from 1898 to 2023 on various critical facets of bakanae disease,and provide perspectives on future research.

关键词： Rice Bakanae disease Fusarium fujikuroi Host-pathogen interaction Pathogenicity Gibberellic acid signaling Disease management