Using data of optic sensors and pigment content in leaves for efficient diagnostics of nitrogen nutrition

Received: February 23rd, 2022 ; Accepted: May 16th, 2022 ; Published: August 12th, 2022 ; Correspondence: [email protected] monitoring and diagnostics of a condition of crops permit to make prompt and proper activities on dressing nitrogen fertilizers. This will allow the plants to use the nitrogen applied efficiently, and therefore reduce their use in field. Since nitrogen that has not been utilized by plants is able to escape into the atmosphere or be washed out of the soil with water. The most accurate diagnostic method is to determine the chemical composition of plants, but it takes quite a long time and requires laboratory conditions, which is not always possible in the field. One of the promising methods is photometric diagnostics of crops using optical instruments. Experiment is carried out in contrasting weather conditions, on soddy-podzolic soil with spring barley and spring rapeseed being investigated. Results of research show the efficiency of using optic sensors (N-testers) for efficient diagnostics of nitrogen nutrition of plants. The readings of the device (N-tester) were compared with the concentration of a and b chlorophyll, determined by a chemical method. Results of diagnostics with portable photometric device ‘Yara’ are correlating with concentrations of chlorophylls a (r=0.96) and b (r = 0.91) in spring rapeseed. Moreover, correlation of rapeseed yield and concentrations of chlorophylls a and b has quantity and inverse relation similar to device indication (r = -0.81 and r = -0.70 respectively). Results of diagnostics with N-tester ‘Spectroluxe’ are strongly correlating with chlorophyll concentration. Device indication correlates stronger with chlorophyll b concentration in spring barley and chlorophyll a concentration in spring rapeseed (rapeseed was investigated in dryer conditions). Thus, such a modern optical device as N-tester, whose action is based on measuring the concentration of leafy chlorophyll, can replace chemical methods and increase the efficiency of nitrogen fertilization, which means increasing the productivity of plants and reducing the negative impact of unreasonable use of nitrogen fertilizers

On One Analytic Method of Constructing Program Controls

Abstract The article proposes an analytical method for constructing control function that ensures transferring linear inhomogeneous stationary system from an initial state to a given final state. Conditions under which the specified transfer is guaranteed are presented. Mathematics Subject Classification: 34H15, 93C15, 93B0

Draft genome sequences for Pantoea ananatis ATCC 35400 and Pantoea stewartii subspecies indologenes ICMP 10132

DATA AVAILABILITY : This Whole Genome Shotgun project for P. ananatis ATCC 35400 has been deposited in DDBJ/ENA/GenBank under accession no. JARNMU000000000. The version described in this paper is the first version, JARNMU010000000. Raw reads used to generate this assembly can be found at SRX19856715, SRX19856716, and SRX19856717. This Whole Genome Shotgun project for P. stewartii ICMP 10132 has been deposited in DDBJ/ENA/ GenBank under accession no. JARNMT000000000. The version described in this paper is the first version, JARNMT010000000. Raw reads used to generate this assembly can be found at SRX19854976 and SRX19854977.Here, we describe draft genome sequences for two bacterial isolates from the genus Pantoea. Pantoea ananatis ATCC 35400 was originally isolated from honeydew melon and was obtained from the American Type Culture Collection. Pantoea stewartii subspecies indologenes ICMP 10132 was originally isolated from sugarcane and classified as Pantoea ananatis, but average nucleotide identity and discriminatory PCR support species reclassification.The National Science Foundation (NSF).https://journals.asm.org/journal/mrahj2024BiochemistryGeneticsMicrobiology and Plant PathologySDG-15:Life on lan

Специфика организации транспортно-логистического кластера с приоритетом развития интеллектуальных транспортных технологий

The article examines the prospects for organizing a cluster as an effective tool for ensuring connectivity of territories of the Russian Federation through the systematic and integrated implementation of intelligent transport technologies, which corresponds to strategic directions of development of transport in the Russian Federation and determines the relevance of the topic. The objective of the study is to determine the features of organisation of the transport and logistics cluster prioritising development of intelligent transport technologies by analysing the prospects for their development, studying variability of characteristics and structure of the cluster under various conditions of its formation based on the methods of formal logic, grouping, analysis of statistical data, normative-legal information, information synthesis. The study resulted in identification of prerequisites for the most rapid development and effective implementation of intelligent transport systems within the cluster. The expediency of using this approach has been substantiated, despite its labour intensity and cost. The study suggests definitions of an innovative transport and logistics cluster, as wells as characteristics of the transport and logistics cluster prioritising intelligent transport technologies. The study revealed the specifics of organisation of this cluster, which is primarily determined by the presence of dual characteristics. The peculiarities of cluster formation are reflected in the proposed structure of the cluster under study. The role of the state in organizing an innovative transport and logistics cluster is also definedВ статье исследованы перспективы организации кластера как эффективного инструмента обеспечения связанности территорий РФ за счёт системного и комплексного внедрения интеллектуальных транспортных технологий, что соответствует стратегическим направлениям развития транспорта РФ и определяет актуальность темы. Целью исследования является определение специфики организации транспортно-логистического кластера с приоритетом развития интеллектуальных транспортных технологий посредством анализа перспективы развития данных технологий в рамках кластера, изучения вариативности характеристик и структуры кластера при различных условиях его формирования на основе методов формальной логики, группировки, анализа статистических данных, нормативно-правовой информации, синтеза информации. В результате исследования авторами выделены предпосылки наиболее быстрого развития и эффективной реализации интеллектуальных транспортных систем в рамках кластера. Обоснована целесообразность применения данного подхода, несмотря на его трудоёмкость и затратность. В исследовании конкретизировано определение инновационного транспортно-логистического кластера. Приведена характеристика транспортно-логистического кластера с приоритетом развития интеллектуальных транспортных технологий, зависящая от условия его формирования. В результате исследования выявлена специфика организации данного кластера, которая, прежде всего, определяется наличием двойственных характеристик. Особенности формирования кластера отражены в предложенной структуре исследуемого кластера. Также определена роль государства в организации инновационного транспортно-логистического кластера

The stealth episome: suppression of gene expression on the excised genomic island PPHGI-1 from Pseudomonas syringae pv. phaseolicola

Pseudomonas syringae pv. phaseolicola is the causative agent of halo blight in the common bean, Phaseolus vulgaris. P. syringae pv. phaseolicola race 4 strain 1302A contains the avirulence gene avrPphB (syn. hopAR1), which resides on PPHGI-1, a 106 kb genomic island. Loss of PPHGI-1 from P. syringae pv. phaseolicola 1302A following exposure to the hypersensitive resistance response (HR) leads to the evolution of strains with altered virulence. Here we have used fluorescent protein reporter systems to gain insight into the mobility of PPHGI-1. Confocal imaging of dual-labelled P. syringae pv. phaseolicola 1302A strain, F532 (dsRFP in chromosome and eGFP in PPHGI-1), revealed loss of PPHGI-1::eGFP encoded fluorescence during plant infection and when grown in vitro on extracted leaf apoplastic fluids. Fluorescence-activated cell sorting (FACS) of fluorescent and non-fluorescent PPHGI-1::eGFP F532 populations showed that cells lost fluorescence not only when the GI was deleted, but also when it had excised and was present as a circular episome. In addition to reduced expression of eGFP, quantitative PCR on sub-populations separated by FACS showed that transcription of other genes on PPHGI-1 (avrPphB and xerC) was also greatly reduced in F532 cells harbouring the excised PPHGI-1::eGFP episome. Our results show how virulence determinants located on mobile pathogenicity islands may be hidden from detection by host surveillance systems through the suppression of gene expression in the episomal state

Pantailocins : phage-derived bacteriocins from Pantoea ananatis and Pantoea stewartii subsp. indologenes

SUPPLEMENTARY MATERIAL : FILE S1. Alignment file for sheath protein sequences to recreate phylogenies in manuscript. FILE S2. Alignment file for J plate protein sequences to recreate phylogenies in manuscript. FIGURE S1. A Model For Invertase Activity in the P. stewartii ICMP 10132 Tailocin Locus.ERRATUM : Volume 89, no. 12, e00471-23, 2023, https://doi.org/10.1128/aem.00929-23. The affiliations and the affiliation numbers for each author should appear as shown in this erratum.Phage-derived bacteriocins are highly specific and effective antimicrobial molecules, which have successfully been used as prophylactic treatments to prevent phytopathogen infections. Given the specificity of tailocins, a necessary step for broadening the tailocin catalog and for extending applicability across systems and diseases is the screening of new clades of phytopathogens for the production of molecules with tailocin-like killing activity. Here, we describe the production by and sensitivity of strains to tailocins produced by Pantoea ananatis and Pantoea stewartii subsp. indologenes. Phylogenetic evidence suggests that these tailocins are derived from Myoviridae family phage like many previously described R-type tailocins but also suggests that cooption from phage occurred independently of previously described tailocins. Since these tailocin encoding loci are present in the same genomic locations across multiple strains of both species and display a level of divergence that is consistent with other shared regions between the genomes and with vertical inheritance of the locus, we refer to them broadly as “Pantailocins.” IMPORTANCE : Phage-derived bacteriocins (tailocins) are ribosomally synthesized structures produced by bacteria in order to provide advantages against competing strains under natural conditions. Tailocins are highly specific in their target range and have proven to be effective for the prevention and/or treatment of bacterial diseases under clinical and agricultural settings. We describe the discovery and characterization of a new tailocin locus encoded within genomes of Pantoea ananatis and Pantoea stewartii subsp. indologenes, which may enable the development of tailocins as preventative treatments against phytopathogenic infection by these species.National Science Foundation (NSF).https://journals.asm.org/journal/aemhj2024BiochemistryGeneticsMicrobiology and Plant PathologySDG-15:Life on lan

The distribution of onion virulence gene clusters among Pantoea spp.

Pantoea ananatis is a gram-negative bacterium and the primary causal agent of center rot of onions in Georgia. Previous genomic studies identified two virulence gene clusters, HiVir and alt, associated with center rot. The HiVir gene cluster is required to induce necrosis on onion tissues via synthesis of pantaphos, (2-hydroxy[phosphonomethyl) maleate), a phosphonate phytotoxin. The alt gene cluster aids in tolerance to thiosulfinates generated during onion tissue damage. Whole genome sequencing of other Pantoea species suggests that these gene clusters are present outside of P. ananatis. To assess the distribution of these gene clusters, two PCR primer sets were designed to detect the presence of HiVir and alt. Two hundred fifty-two strains of Pantoea spp. were phenotyped using the red onion scale necrosis (RSN) assay and were genotyped using PCR for the presence of these virulence genes. A diverse panel of strains from three distinct culture collections comprised of 24 Pantoea species, 41 isolation sources, and 23 countries, collected from 1946–2019, was tested. There is a significant association between the alt PCR assay and Pantoea strains recovered from symptomatic onion (P < 0.001). There is also a significant association of a positive HiVir PCR and RSN assay among P. ananatis strains but not among Pantoea spp., congeners. This may indicate a divergent HiVir cluster or different pathogenicity and virulence mechanisms. Last, we describe natural alt positive [RSN C /HiVir C /alt C ] P. ananatis strains, which cause extensive bulb necrosis in a neck-to-bulb infection assay compared to alt negative [RSN C /HiVir C /alt] P. ananatis strains. A combination of assays that include PCR of virulence genes [HiVir and alt] and an RSN assay can potentially aid in identification of onion-bulb-rotting pathogenic P. ananatis strains.The Vidalia Onion Committee, United States Department of Agriculture (USDA), ANII, Uruguay), CSIC Grupos de Investigación I + D 2000 (CSIC, Udelar, Uruguay), Specialty Crops Research Initiative Award from the USDA, and National Institute of Food and Agriculture.http://www.frontiersin.org/Plant_Scienceam2022BiochemistryForestry and Agricultural Biotechnology Institute (FABI)GeneticsMicrobiology and Plant Patholog

Genomic delineation and description of species and within-species lineages in the genus Pantoea

As the name of the genus Pantoea (“of all sorts and sources”) suggests, this genus includes bacteria with a wide range of provenances, including plants, animals, soils, components of the water cycle, and humans. Some members of the genus are pathogenic to plants, and some are suspected to be opportunistic human pathogens; while others are used as microbial pesticides or show promise in biotechnological applications. During its taxonomic history, the genus and its species have seen many revisions. However, evolutionary and comparative genomics studies have started to provide a solid foundation for a more stable taxonomy. To move further toward this goal, we have built a 2,509-gene core genome tree of 437 public genome sequences representing the currently known diversity of the genus Pantoea. Clades were evaluated for being evolutionarily and ecologically significant by determining bootstrap support, gene content dierences, and recent recombination events. These results were then integrated with genome metadata, published literature, descriptions of named species with standing in nomenclature, and circumscriptions of yet-unnamed species clusters, 15 of which we assigned names under the nascent SeqCode. Finally, genome-based circumscriptions and descriptions of each species and each significant genetic lineage within species were uploaded to the LINbase Web server so that newly sequenced genomes of isolates belonging to any of these groups could be precisely and accurately identified