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Molecular Identification of Maize Streak Virus in Côte d’Ivoire

American Journal of plant Sciences 2025年第1期16卷 41-50页

作者： Guinagui N’Doua Bertrand Koala Moustapha Yéo Gnénakan Tuo Seydou Ouattara Bakary Ouattara Bognan Winnie Miyasi Sérémé Drissa Koné Daouda Fatogoma Sorho Laboratory of Biotechnology Agriculture and Valorization of Biological Resources Pedagogical and Research Unit of Plant Physiology and Pathology UFR Biosciences Flix Houphout-Boigny University Abidjan Cte dIvoire Wascal/African Center of Excellence on Climate Change Biodiversity and Sustainable Agriculture Abidjan Cte dIvoire (Wascal/CEA-CCBAD) Abidjan Cte dIvoire National Center for Scientific and Technological research Institute of the Environment and Agricultural Research Crop Protection and Defense Laboratory Ouagadougou Burkina Faso National Biosafety Agency National Biosafety Laboratory Ouagadougou Burkina Faso National Center for Agricultural research Ferkessedougou Research Station Ferkessedougou Cte dIvoire

Maize (Zea mays L.) is the world’s leading cereal crop, with production estimated at over 1 billion tonnes in 2022. In Côte d’Ivoire, maize is one of the most widely consumed foods, with national production exceeding 1 million tonnes in 2022. Despite its importance, this crop is subject to numerous biotic constraints, including Maize streak virus (MSV). The objective of this study was to characterize MSV isolates from Côte d’Ivoire using molecular biology techniques. To achieve this, maize leaf samples displaying characteristic symptoms of MSV were collected from different agro-ecological zones (AEZs) of Côte d’Ivoire. Total DNA was extracted from the collected samples using the CTAB method and quantified with a Nanodrop spectrophotometer. The C2 region of the MSV genome’s open reading frame (ORF) was amplified through polymerase chain reaction (PCR) using MSV-specific primers. The resulting PCR products were sequenced using the Sanger method. Bioinformatics analysis was performed using MSV sequences from other African countries (retrieved from NCBI) alongside sequences obtained in this study. The analysis was conducted using MEGA X version 10.05 software. The results showed that the main symptoms observed in the field included the presence of longitudinal light green streaks on leaves, stunted plant growth, and incomplete seed development in infected plants. Phylogenetic analysis of the sequences from Côte d’Ivoire revealed three monophyletic groups, with sequences of some isolates collected from the same plot belonging to different groups. The MSV sequences from Côte d’Ivoire are very close to those from Rwanda. This study underscores the need for further investigation into the genetic diversity of MSV strains to enhance the diagnosis and management of this viral disease, which is particularly prevalent in maize crops in Côte d’Ivoire.

关键词： Characterization Molecular Biology MSV Maize Côte d’Ivoire

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Epigenetics in the modern era of crop improvements

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Science China Life Sciences 2025年

作者： Yan Xue Xiaofeng Cao Xiangsong Chen Xian Deng Xingwang Deng Yong Ding Aiwu Dong Chengguo Duan Xiaofeng Fang Lei Gong Zhizhong Gong Xiaofeng Gu Chongsheng He Hang He Shengbo He Xinjian He Yan He Yuehui He Guifang Jia Danhua Jiang Jianjun Jiang Jinsheng Lai Zhaobo Lang Chenlong Li Qing Li Xingwang Li Bao Liu Bing Liu Xiao Luo Yijun Qi Weiqiang Qian Guodong Ren Qingxin Song Xianwei Song Zhixi Tian Jiawei Wang Yuan Wang Liang Wu Zhe Wu Rui Xia Jun Xiao Lin Xu Zhengyi Xu Wenhao Yan Hongchun Yang Jixian Zhai Yijing Zhang Yusheng Zhao Xuehua Zhong Daoxiu Zhou Ming Zhou Yue Zhou Bo Zhu Jiankang Zhu Qikun Liu College of Life Sciences Institute of Life Science and Green Development Hebei University Biotechnology research Institute Chinese Academy of Agricultural Sciences College of Biology Hunan Key Laboratory of Plant Functional Genomics and Developmental Regulation Hunan Engineering and Technology Research Center of Hybrid Rapeseed Hunan University Institute of Advanced Agricultural Sciences School of Advanced Agricultural Sciences Peking University State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural University National Institute of Biological Sciences Key Laboratory of Seed Innovation Institute of Genetics and Developmental Biology Chinese Academy of Sciences School of Advanced Agricultural Sciences Peking-Tsinghua Center for Life Sciences Peking University Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education College of Chemistry and Molecular Engineering Peking University Key Laboratory of Seed Innovation State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences State Key Laboratory of Wheat Improvement Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences in Weifang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life Sciences Henan University State Key Laboratory of Maize Bio-breeding National Maize Improvement Center Department of Plant Genetics and Breeding China Agricultural University Frontiers Science Center for Molecular Design Breeding China Agricultural University Center for Crop Functional Genomics and Molecular Breeding China Agricultural University Sanya Institute of China Agricultural University Hainan Yazhou Bay Seed Laboratory Institute of Advan

Epigenetic mechanisms are integral to plant growth, development, and adaptation to environmental stimuli. Over the past two decades,our comprehension of these complex regulatory processes has expanded remarkably, producing a substantial body of knowledge on both locus-specific mechanisms and genome-wide regulatory patterns. Studies initially grounded in the model plant Arabidopsis have been broadened to encompass a diverse array of crop species, revealing the multifaceted roles of epigenetics in physiological and agronomic traits. With recent technological advancements, epigenetic regulations at the single-cell level and at the large-scale population level are emerging as new focuses. This review offers an in-depth synthesis of the diverse epigenetic regulations, detailing the catalytic machinery and regulatory functions. It delves into the intricate interplay among various epigenetic elements and their collective influence on the modulation of crop traits. Furthermore, it examines recent breakthroughs in technologies for epigenetic modifications and their integration into strategies for crop improvement. The review underscores the transformative potential of epigenetic strategies in bolstering crop performance, advocating for the development of efficient tools to fully exploit the agricultural benefits of epigenetic insights.

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Enhancing plant Resilience to Abiotic Stress:The Power of Biostimulants

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Phyton-International Journal of Experimental Botany 2025年第1期94卷 1-31页

作者： Su-Ee Lau Lucas Wei Tze Lim Mohd Fadhli Hamdan Colin Chan Noor Baity Saidi Janna Ong-Abdullah Boon Chin Tan Centre for research in Biotechnology for agriculture Universiti MalayaKuala Lumpur50603Malaysia Faculty of Science Universiti MalayaKuala Lumpur50603Malaysia School of Biological Sciences Universiti Sains MalaysiaGeorge Town11800Malaysia School of Biology Faculty of Applied SciencesUiTM Shah AlamShah Alam40450Malaysia Department of Biotechnology Faculty of Applied SciencesUCSI UniversityCheras56000Malaysia Department of cell and Molecular Biology Faculty of Biotechnology and Biomolecular SciencesUniversiti Putra MalaysiaSerdang43400Malaysia

Abiotic stresses such as drought,heat,salinity,and heavy metal contamination severely affect global agricultural *** 2005 and 2015,droughts caused losses of approximately USD 29 billion in developing countries,and from 2008 to 2018,droughts accounted for over 34%of crop and livestock yield losses,totaling about USD 37 *** support the growing human population,agricultural output must increase substantially,necessitating a 60%–100%rise in crop productivity to meet the escalating *** address environmental challenges,organic,inorganic,and microbial biostimulants are increasingly employed to enhance plant resilience through various morphological,physiological,and biochemical *** biostimulants enhance plant resilience under abiotic stress through mechanisms such as abscisic acid signaling modulation,which regulates stomatal closure to reduce water loss during drought and heat ***,they aid in scavenging reactive oxygen species and stabilizing ion channels,mitigating oxidative damage,and maintaining ionic balance under stress conditions such as *** review summarizes recent advancements in applying these biostimulants,focusing on their roles in triggering morphological,physiological,biochemical,and molecular changes that collectively enhance plant resilience under stress *** also includes a bibliometric analysis of all articles published on biostimulants from 2019 to 2024 and explores future research *** was placed on optimizing biostimulant formulations and understanding their synergistic effects to maximize their efficacy under various stress *** integrating biostimulants into agricultural practices,we can adopt a sustainable strategy to safeguard crop productivity in the face of climate change and environmental stressors.

关键词： Abiotic stress crop improvement microbial plant growth promoting rhizobacteria protein hydrolysate seaweed

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Glucose alleviates cadmium toxicity by increasing cadmium fi xation in root cell wall and sequestration into vacuole in Arabidopsis

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Journal of Integrative plant Biology 2015年第10期57卷 830-837页

作者： Yuan-Zhi Shi Xiao-Fang Zhu Jiang-Xue Wan Gui-Xin Li Shao-Jian Zheng Tea research Institute of the Chinese Academy of Agricultural Sciences and the Key Laboratory for plant Biology and Resource Application of Tea the Ministry of Agriculture State Key Laboratory of plant physiology and Biochemistry College of Life SciencesZhejiang University State Key Laboratory of Soil and sustainable agriculture China Institute of Soil Science the Chinese Academy of Science College of Agronomy and Biotechnology Zhejiang University

Glucose (Glu) is involved in not only plant physiological and developmental events but also plant responses to abiotic stresses. Here, we found that the exogenous Glu improved root and shoot growth, reduced shoot cadmium (Cd) concentration, and rescued Cd-induced chlorosis in Arabidopsis thaliana (Columbia ecotype, Col-0) under Cd stressed conditions. Glucose increased Cd retained in the roots, thus reducing its translocation from root to shoot significantly. The most Cd retained in the roots was found in the hemicellulose 1. Glucose combined with Cd (Glu t Cd) treatment did not affect the content of pectin and its binding capacity of Cd while it increased the content of hemicelluloses 1 and the amount of Cd retained in it significantly. Furthermore, Leadmium Green staining indicated that more Cd was compartmented into vacuoles in Glu t Cd treatment compared with Cd treatment alone, which was in accordance with the significant upregulation of the expression of tonoplast-localized metal transporter genes, suggesting that com-partmentation of Cd into vacuoles also contributes to the Glu-alleviated Cd toxicity. Taken together, we demonstrated that Glu-alleviated Cd toxicity is mediated through increas-ing Cd fixation in the root cell wall and sequestration into the vacuoles.

关键词： Arabidopsis cadmium tolerance glucose plant cell wall plant vacuole

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Elicitation-Based Modulation of Shelf Life in Fruits: Physiological and Molecular Insights

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2283-2300页

作者： Ankita Kundu Abir Das Sayan Pal Arijit Ghosh Malay Kumar Adak Masayuki Fujita Mirza Hasanuzzaman plant physiology and Molecular Biology research unit Department of BotanyUniversity of KalyaniKalyani741235India Laboratory of plant Stress Responses Faculty of AgricultureKagawa UniversityKagawa761-0795Japan Department of Agronomy Faculty of AgricultureSher-E-Bangla Agricultural UniversityDhaka1207Bangladesh

The process of ripening involves physiological and biochemical events that become a concern during postharvest *** have documented different approaches for the preservation and maintenance of fruit quality during the postharvest period that are biocompatible and fully safe for *** residues that sustain sensory characteristics,such as color,ﬂavor,aroma,and texture,are *** fruit ripening,both physical and chemical elicitors are described that regulate ethylene biosynthesis or its signaling for gene *** key regulatory enzymes,such as ACC synthase and ACC oxidase,for ethylene biosynthesis,are important for both climacteric and non-climacteric ***-oxidizing genes that retain sensory characteristics are concerns in this *** elicitors,including chitosan,polyamine,phenolics,lipopolysaccharide,silver derivatives,and nanocomposites,are *** pressure,light wavelengths,relative humidity,cooling,and other environmental factors are important for improved postharvest *** elicitors maintain redox status by inhibiting the generation of reactive oxygen species(ROS)or their *** regulators,including abscisic acid,auxin,brassinosteroids,jasmonic acid,and salicylic acid,are important for the regulation of *** injuries,ionic imbalances,temperature variations,and tissue dehydration can occur irrespective of ripening *** use of synthetic physiochemically active compounds is discussed in terms of physiological,metabolic,cellular,and molecular ***-induced autocatalytic processes,antioxidant cascades,epigenetic regulation,and homeodomain gene expression are ***–acid metabolism,dissolution of the cell wall,and direct or indirect production of secondary metabolites related to postharvest storage are mentioned regarding chilling *** and agrochemicals that trigger plant defense to increase secondary metabolite production are discussed fo

关键词： Epigenetics ethylene elicitors ripening polyphenolics postharvest storage

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Phenotyping Tomato Root Developmental Plasticity in Response to Salinity in Soil Rhizotrons

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plant Phenomics 2021年第1期3卷 14-27页

作者： Jacinto Gandullo Safarina Ahmad Essam Darwish Rumyana Karlova Christa Testerink Section of plant physiology and plant cell Biology Swammerdam Institute for Life ScienceUniversity of AmsterdamScience Park 9041098 XH AmsterdamNetherlands Departamento de Biología Vegetal y Ecología Área de Fisiología VegetalFacultad de BiologíaUniversidad de SevillaSevilleSpain plant physiology Section Agricultural Botany DepartmentFaculty of AgricultureCairo University12613 GizaEgypt Laboratory of plant physiology Plant Sciences GroupWageningen University and Research6708PB WageningenNetherlands

plants have developed multiple strategies to respond to salt *** order to identify new traits related to salt tolerance,with potential breeding application,the research focus has recently been shifted to include root system architecture(RSA)and root *** a simple but effective root phenotyping system containing soil(rhizotrons),RSA of several tomato cultivars and their response to salinity was *** observed a high level of root plasticity of tomato seedlings under salt *** general root architecture was substantially modified in response to salt,especially with respect to position of the lateral roots in the *** the soil surface,where salt accumulates,lateral root emergence was most strongly *** the set of tomato cultivars,H1015 was the most tolerant to salinity in both developmental stages studied.A significant correlation between several root traits and aboveground growth parameters was observed,highlighting a possible role for regulation of both ion content and root architecture in salt stress resilience.

关键词： soil cultivar breeding

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The landscape of molecular mechanisms for salt tolerance in wheat

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The Crop Journal 2018年第1期6卷 42-47页

作者： Meng Wang Guangmin Xia The Key Laboratory of plant cell Engineering and Germplasm Innovation Ministry of Education School of Life Sciences Shandong University State Key Laboratory of Soil and sustainable agriculture Institute of Soil Science Chinese Academy of Sciences

Wheat is one of the most important food crops, and its yield is seriously restricted by high salinity and other abiotic stresses. Many attempts have been made to elucidate the major physiological processes associated with salt tolerance and to identify the genes controlling the processes. In this review, the major role of high-affinity potassium transporter(HKT)genes in enhancing the salt tolerance of wheat is summarized. The link between maintenance of reactive oxygen species(ROS) homeostasis and salt tolerance through a comprehensive study of a wheat introgression line is examined, and the contribution of a set of genes involved in this process is depicted. New research strategies to uncover the mechanisms underlying salt tolerance in wheat based on recent advances in omics will be discussed.

关键词： Ionic and ROS homeostasis Molecular breeding Salt tolerance Triticum aestivum

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Changes in Metabolites and Allelopathic Effects of Non-Pigmented and Black-Pigmented Lowland Indica Rice Varieties in Phosphorus Deficiency

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Rice science 2024年第4期31卷 434-448,I0025,I0026页

作者： Liyana SARA Sompop SAEHENG Panupong PUTTARAK Lompong KLINNAWEE Division of Biological Science Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand Division of Health and Applied Sciences Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand plant cell and physiology for sustainable agriculture research unit Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand Department of Pharmacognosy and Pharmaceutical Botany Faculty of Pharmaceutical SciencesPrince of Songkla UniversitySongkhla 90110Thailand Phytomedicine and Pharmaceutical Biotechnology Excellence Center Prince of Songkla UniversitySongkhla 90110Thailand

Phosphorus(P) levels alter the allelopathic activity of rice seedlings against lettuce seeds. In this study, we investigated the effect of P deficiency on the allelopathic potential of non-pigmented and pigmented rice varieties. Rice seedlings of the white variety Khao Dawk Mali(KDML105, non-pigmented) and the black varieties Jao Hom Nin(JHN, pigmented) and Riceberry(RB, pigmented) were cultivated under high P(HP) and low P(LP) conditions. Morphological and metabolic responses to P deficiency were investigated. P deficiency inhibited shoot growth but promoted root growth of rice seedlings in all three varieties. Moreover, P deficiency led to decreased cytosolic phosphate(Pi) and total P concentrations in both shoot and root tissues. The subsequent reduction in internal P concentration enhanced the accumulation of phenolic compounds in both shoot and root tissues of the seedlings. Subsequently, allelopathy-based inter-and intra-specific interactions were assessed using water extracts from seedlings of the three varieties grown under HP and LP conditions. These extracts were tested on seeds of lettuce, the weed Dactyloctenium aegyptium, and the same rice variety. The shoot and root extracts from P-deficient seedlings reduced the germination of all recipient plants. Specifically, the shoot extract from P-deficient KDML105 seedlings reduced the germination index(GI) of lettuce seeds to 1%, while those from P-deficient RB and JHN seedlings produced GIs of 32% and 42%, respectively. However, when rice seeds were exposed to their own LP shoot and root extracts, their GIs increased up to 4-fold, compared with the HP extracts. Additionally, the shoot extracts from P-deficient plants also stimulated the germination of D. aegyptium by about 2–3-fold, whereas the root extracts did not have this effect. Therefore, P starvation led to the accumulation and exudation of phenolics in the shoots and roots of rice seedlings, altering their allelopathic activities. To adapt to P defici

关键词： phosphorus deficiency non-pigmented and black-pigmented rice phenolics extract allelopathy

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Expression of Acyl-lipid 12-desaturase Gene in Prokaryotic and Eukaryotic cells and Its Effect on Cold Stress Tolerance of Potato

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Journal of Integrative plant Biology 2010年第3期52卷 289-297页

作者： Reza Maali Amiri Natalia O. Yur'eva Khristina R. Shimshilashvili Irina V. Goldenkova-Pavlova Vasiliy P. Pchelkin Elmira I. Kuznitsova Vladimir D. Tsydendambaev Tamara I. Trunova Dmitry A. Los Gholamreza Salehi Jouzani Alexander M. Nosov Department of Agronomy and plant Breeding University College of Agriculture and Natural Resources of the University of Tehran K.A.Timiryazev Institute of plant physiology Russian Academy of Sciences (RAS) Vavilov Institute of General Genetics Agricultural Biotechnology researches Institute of Iran (ABRII) Department of plant physiology Moscow State University

We report the expression profile of acyl-lipid △12-desaturase （desA） gene from Synechocystis sp. PCC6803 and its effect on cell membrane lipid composition and cold tolerance in prokaryotic （Escherichia coil） and eukaryotic （Solanum tuberosum） cells. For this purpose, a hybrid of desA and reporter gene encoding thermostable lichenase （licBM3） was constructed and used to transform these cells. The expression of this hybrid gene was measured using qualitative （Petri dish test, electrophoregram and zymogram） and quantitative methods （spectrometry and gas liquid chromatography assays）. The maximum level of linoleic acid in the bacterial cells containing hybrid gene was 1.9% of total fatty acids. Cold stress tolerance assays using plant damage index and growth parameters showed that cold tolerance was enhanced in primary transgenic lines because of increased unsaturated fatty acid concentration in their lipids. The greatest content of 18：2 and 18：3 fatty acids in primary transgenic plants was observed for lines 2 （73%） and 3 （41%）. Finally, our results showed that desaturase could enhance tolerance to cold stress in potato, and desaturase and lichenase retain their functionality in the structure of the hybrid protein where the enzymatic activity of target gene product was higher than in the case of reporter lichenase gene absence in the construction.

关键词： Expression of Acyl-lipid 12-desaturase Gene in Prokaryotic and Eukaryotic cells and Its Effect on Cold Stress Tolerance of Potato gene

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Regulating role of acetylcholine and its antagonists in inward rectified K^+ channels from guard cell protoplasts of Vicia faba

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Science China(Life Sciences) 2000年第2期43卷 217-224页

作者：冷强花宝光郭玉海娄成后 plant physiology Laboratory Chinese Agricultural University Beijing China plant physiology and Biochemistry Laboratory Beijing Agricultural College Beijing China

The inward rectified potassium current of Vicia faba guard cell protoplasts treated with acetylcholine (ACh) or the antagonists of its receptors were recorded by employing the patch clamp technique. The results show that ACh at lower concentrations increases the inward K+ current, in contrast, ACh at higher concentrations inhibits it. Treated with d-Tubocurarine (d-Tub), an antagonist of the nicotine ACh receptor (nAChR) inhibits the inward K+ current by 30%. Treated with atropine (Atr), an antagonist of the muscarine (Mus) ACh receptor (mAChR) also inhibits it by 36%. However, if guard cell protoplasts are treated with d-Tub and Atr together, the inward K+ current is inhibited by 60%-75%. Tetraethylammonium chloride (TEA), a strong inhibitor of K+ channels has no effect on the inward K+ current regulated by ACh, suggesting that there are inward K+ channels modulated by AChRs on the membrane of the guard cell protoplasts. These data demonstrate an ACh-regulated mechanism for stomatal movement.

关键词： acetylcholine acetylcholine receptor inward K+ current guard cell.

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