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https://www.readbyqxmd.com/read/30059870/depicting-the-physiological-and-ultrastructural-responses-of-soybean-plants-to-al-stress-conditions
#1
André Rodrigues Dos Reis, Lucas Aparecido Manzani Lisboa, Heitor Pontes Gestal Reis, Jéssica Pigatto de Queiroz Barcelos, Elcio Ferreira Santos, José Mateus Kondo Santini, Barbara Rocha Venâncio Meyer-Sand, Fernando Ferrari Putti, Fernando Shintate Galindo, Flavio Hiroshi Kaneko, Julierme Zimmer Barbosa, Amanda Pereira Paixão, Enes Furlani Junior, Paulo Alexandre Monteiro de Figueiredo, José Lavres
Aluminium (Al) is a toxic element for plants living in soils with acidic pH values, and it causes reductions in the roots and shoots development. High Al concentrations can cause physiological and structural changes, leading to symptoms of toxicity in plant tissue. The aim of this study was to describe the Al toxicity in soybean plants through physiological, nutritional, and ultrastructure analyses. Plants were grown in nutrient solution containing increasing Al concentrations (0; 0.05; 0.1; 1.0, 2.0 and 4...
July 25, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29767334/are-phloem-derived-amino-acids-the-origin-of-the-elevated-malate-concentration-in-the-xylem-sap-following-mineral-n-starvation-in-soybean
#2
Simone C Vitor, Luciano do Amarante, Ladaslav Sodek
A substantial increase in malate in the xylem sap of soybean subjected to mineral N starvation originates mainly from aspartate, a prominent amino acid of the phloem. A substantial increase in xylem malate was found when non-nodulated soybean plants were transferred to a N-free medium. Nodulated plants growing in the absence of mineral N and, therefore, dependent on symbiotic N2 fixation also contained elevated concentrations of malate in the xylem sap. When either nitrate or ammonium was supplied, malate concentrations in the xylem sap were low, both for nodulated and non-nodulated plants...
May 16, 2018: Planta
https://www.readbyqxmd.com/read/29575001/aphid-myzus-persicae-feeding-on-the-parasitic-plant-dodder-cuscuta-australis-activates-defense-responses-in-both-the-parasite-and-soybean-host
#3
Huifu Zhuang, Juan Li, Juan Song, Christian Hettenhausen, Meredith C Schuman, Guiling Sun, Cuiping Zhang, Jing Li, Dunlun Song, Jianqiang Wu
Dodders (Cuscuta spp.) are shoot holoparasites, whose haustoria penetrate host tissues to enable fusion between the parasite and host vascular systems, allowing Cuscuta to extract water, nutrients and other molecules from hosts. Aphids are piercing-sucking herbivores that use specialized stylets to feed on phloem sap. Aphids are known to feed on Cuscuta, but how Cuscuta and its host plant respond to aphids attacking the parasite was unknown. Phytohormone quantification, transcriptomic analysis and bioassays were performed to determine the responses of Cuscuta australis and its soybean (Glycine max) hosts to the feeding of green peach aphid (GPA; Myzus persicae) on C...
June 2018: New Phytologist
https://www.readbyqxmd.com/read/29370345/sucrose-supply-from-leaves-is-required-for-aerenchymatous-phellem-formation-in-hypocotyl-of-soybean-under-waterlogged-conditions
#4
Hirokazu Takahashi, Qi Xiaohua, Satoshi Shimamura, Asako Yanagawa, Susumu Hiraga, Mikio Nakazono
Background and Aims: Soil waterlogging often causes oxygen deficiency in the root systems of plants and severely inhibits plant growth. Formation of aerenchyma - interconnected spaces that facilitate the movement of gases between and within the aerial and submerged parts of plants - is an adaptive trait for coping with waterlogged conditions. Soybean (Glycine max) forms porous secondary tissues known as aerenchymatous phellem (AP), which are derived from the outermost cell layer of phellogen...
March 14, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29145496/insights-into-soybean-transcriptome-reconfiguration-under-hypoxic-stress-functional-regulatory-structural-and-compositional-characterization
#5
Thiago J Nakayama, Fabiana A Rodrigues, Norman Neumaier, Juliana Marcolino-Gomes, Hugo B C Molinari, Thaís R Santiago, Eduardo F Formighieri, Marcos F Basso, José R B Farias, Beatriz M Emygdio, Ana C B de Oliveira, Ângela D Campos, Aluízio Borém, Frank G Harmon, Liliane M Mertz-Henning, Alexandre L Nepomuceno
Soybean (Glycine max) is one of the major crops worldwide and flooding stress affects the production and expansion of cultivated areas. Oxygen is essential for mitochondrial aerobic respiration to supply the energy demand of plant cells. Because oxygen diffusion in water is 10,000 times lower than in air, partial (hypoxic) or total (anoxic) oxygen deficiency is important component of flooding. Even when oxygen is externally available, oxygen deficiency frequently occurs in bulky, dense or metabolically active tissues such as phloem, meristems, seeds, and fruits...
2017: PloS One
https://www.readbyqxmd.com/read/27995590/behavioral-comparisons-of-ingestion-and-excretion-by-selected-species-of-pentatomids-evidence-of-feeding-on-different-food-sources-supports-pest-status
#6
T Lucini, A R Panizzi
Laboratory studies were conducted on food ingestion and excretion by selected species of pentatomids on different food sources to support their pest status. We compared the frequency and time of feeding on vegetative (stem) and reproductive (seed) structures of soybean, Glycine max (L.) Merrill and of maize, Zea mays L. by Piezodorus guildinii (Westwood), Dichelops melacanthus (Dallas), and Edessa meditabunda (F.); in addition, the amount of excreta (feces) produced were compared for D. melacanthus feeding on seed of soybean and stem of maize seedling...
August 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/27200039/orthology-analysis-and-in-vivo-complementation-studies-to-elucidate-the-role-of-dir1-during-systemic-acquired-resistance-in-arabidopsis-thaliana-and-cucumis-sativus
#7
Marisa Isaacs, Philip Carella, Jennifer Faubert, Jocelyn K C Rose, Robin K Cameron
AtDIR1 (Defective in Induced Resistance1) is an acidic lipid transfer protein essential for systemic acquired resistance (SAR) in Arabidopsis thaliana. Upon SAR induction, DIR1 moves from locally infected to distant uninfected leaves to activate defense priming; however, a molecular function for DIR1 has not been elucidated. Bioinformatic analysis and in silico homology modeling identified putative AtDIR1 orthologs in crop species, revealing conserved protein motifs within and outside of DIR1's central hydrophobic cavity...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27200027/water-stress-modulates-soybean-aphid-performance-feeding-behavior-and-virus-transmission-in-soybean
#8
Punya Nachappa, Christopher T Culkin, Peter M Saya, Jinlong Han, Vamsi J Nalam
Little is known about how water stress including drought and flooding modifies the ability of plants to resist simultaneous attack by insect feeding and transmission of insect-vectored pathogen. We analyzed insect population growth, feeding behaviors, virus transmission, and plant amino acid profiles and defense gene expression to characterize mechanisms underlying the interaction between water stress, soybean aphid and aphid-transmitted, Soybean mosaic virus, on soybean plants. Population growth of non-viruliferous aphids was reduced under drought stress and saturation, likely because the aphids spent less time feeding from the sieve element on these plants compared to well-watered plants...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/26686284/arsenic-toxicity-in-soybean-seedlings-and-their-attenuation-mechanisms
#9
Ana L Armendariz, Melina A Talano, Claudia Travaglia, Herminda Reinoso, Ana L Wevar Oller, Elizabeth Agostini
Even though vast areas contaminated with arsenic (As) are under soybean (Glycine max) cultivation, little is known about the growth and intrinsic antioxidant metabolism of soybean in response to As exposure. Thus, an evaluation was carried out of plant growth, root anatomy, antioxidant system and photosynthetic pigment content under arsenate (As(V)) and arsenite (As(III)) treatment. Soybean seedling growth was significantly affected at 25 μM or higher concentrations of As(V) or As(III), and the toxic effect on root growth was associated with cell death of root tips...
January 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/26578627/feeding-behavior-of-soybean-aphid-hemiptera-aphididae-biotype-2-on-resistant-and-susceptible-soybean
#10
Jane C Todd, M A Rouf Mian, Elaine A Backus, John J Finer, Margaret G Redinbaugh
Host plant resistance to the soybean aphid, Aphis glycines Matsumura, is an effective means of controlling populations of this introduced pest species in the United States. Rag (Resistance to Aphis glycines) genes identified in soybean germplasm have been incorporated into commercial cultivars, but differential responses by soybean aphid biotypes to the Rag genes have made understanding mechanisms underlying resistance associated with Rag genes increasingly important. We compared the behavior of biotype 2 aphids on the resistant soybean line PI243540, which is a source of Rag2, and the susceptible cultivar Wyandot...
February 2016: Journal of Economic Entomology
https://www.readbyqxmd.com/read/26516375/whole-genome-sequence-of-the-soybean-aphid-endosymbiont-buchnera-aphidicola-and-genetic-differentiation-among-biotype-specific-strains
#11
Bryan J Cassone, Jacob A Wenger, Andrew P Michel
Endosymbiosis with microorganisms is common in insects, with more than 10% of species requiring the metabolic capabilities of intracellular bacteria for their nutrient acquisition. Aphids harbor an obligate mutualism with the vertically transferred endosymbiont, Buchnera aphidicola, which produces key nutrients lacking in the aphid's phloem-based diet that are necessary for normal development and reproduction. It is thought that, in some groups of insects, bacterial symbionts may play key roles in biotype evolution against host-plant resistance...
2015: Journal of Genomics
https://www.readbyqxmd.com/read/26162601/soybean-glycine-max-sweet-gene-family-insights-through-comparative-genomics-transcriptome-profiling-and-whole-genome-re-sequence-analysis
#12
Gunvant Patil, Babu Valliyodan, Rupesh Deshmukh, Silvas Prince, Bjorn Nicander, Mingzhe Zhao, Humira Sonah, Li Song, Li Lin, Juhi Chaudhary, Yang Liu, Trupti Joshi, Dong Xu, Henry T Nguyen
BACKGROUND: SWEET (MtN3_saliva) domain proteins, a recently identified group of efflux transporters, play an indispensable role in sugar efflux, phloem loading, plant-pathogen interaction and reproductive tissue development. The SWEET gene family is predominantly studied in Arabidopsis and members of the family are being investigated in rice. To date, no transcriptome or genomics analysis of soybean SWEET genes has been reported. RESULTS: In the present investigation, we explored the evolutionary aspect of the SWEET gene family in diverse plant species including primitive single cell algae to angiosperms with a major emphasis on Glycine max...
July 11, 2015: BMC Genomics
https://www.readbyqxmd.com/read/26010305/charge-size-and-cellular-selectivity-for-multiwall-carbon-nanotubes-by-maize-and-soybean
#13
Guangshu Zhai, Sarah M Gutowski, Katherine S Walters, Bing Yan, Jerald L Schnoor
Maize (Zea mays) and soybean (Glycine max) were used as model food-chain plants to explore vegetative uptake of differently charged multiwall carbon nanotubes (MWCNTs). Three types of MWCNTs, including neutral pristine MWCNT (p-MWCNT), positively charged MWCNT-NH2, and negatively charged MWCNT-COOH, were directly taken-up and translocated from hydroponic solution to roots, stems, and leaves of maize and soybean plants at the MWCNT concentrations ranging from 10.0 to 50.0 mg/L during 18-day exposures. MWCNTs accumulated in the xylem and phloem cells and within specific intracellular sites like the cytoplasm, cell wall, cell membrane, chloroplast, and mitochondria, which was observed by transmission electron microscopy...
June 16, 2015: Environmental Science & Technology
https://www.readbyqxmd.com/read/25778411/visualization-of-water-transport-into-soybean-nodules-by-tof-sims-cryo-system
#14
Morio Iijima, Toshimasa Watanabe, Tomoharu Yoshida, Michio Kawasaki, Toshiyuki Kato, Koji Yamane
This paper examined the route of water supply into soybean nodules through the new visualization technique of time of flight secondary ion mass spectrometry (Tof-SIMS) cryo system, and obtained circumstantial evidence for the water inflow route. The maximum resolution of the Tof-SIMS imaging used by this study was 1.8 μm (defined as the three pixel step length), which allowed us to detect water movement at the cellular level. Deuterium-labeled water was supplied to soybean plants for 4h and the presence of deuterium in soybean nodules was analyzed by the Tof-SIMS cryo system...
April 15, 2015: Journal of Plant Physiology
https://www.readbyqxmd.com/read/25292417/salinity-tolerance-in-soybean-is-modulated-by-natural-variation-in-gmsalt3
#15
Rongxia Guan, Yue Qu, Yong Guo, Lili Yu, Ying Liu, Jinghan Jiang, Jiangang Chen, Yulong Ren, Guangyu Liu, Lei Tian, Longguo Jin, Zhangxiong Liu, Huilong Hong, Ruzhen Chang, Matthew Gilliham, Lijuan Qiu
The identification of genes that improve the salt tolerance of crops is essential for the effective utilization of saline soils for agriculture. Here, we use fine mapping in a soybean (Glycine max (L.) Merr.) population derived from the commercial cultivars Tiefeng 8 and 85-140 to identify GmSALT3 (salt tolerance-associated gene on chromosome 3), a dominant gene associated with limiting the accumulation of sodium ions (Na+) in shoots and a substantial enhancement in salt tolerance in soybean. GmSALT3 encodes a protein from the cation/H+ exchanger family that we localized to the endoplasmic reticulum and which is preferentially expressed in the salt-tolerant parent Tiefeng 8 within root cells associated with phloem and xylem...
December 2014: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/25282557/the-soybean-mycorrhiza-inducible-phosphate-transporter-gene-gmpt7-also-shows-localized-expression-at-the-tips-of-vein-endings-of-senescent-leaves
#16
Yuki Inoue, Yoshihiro Kobae, Eiji Omoto, Aiko Tanaka, Mari Banba, Shoko Takai, Yosuke Tamura, Aya Hirose, Kunihiko Komatsu, Shungo Otagaki, Shogo Matsumoto, Mitsutaka Taniguchi, Chikara Masuta, Masao Ishimoto, Shingo Hata
GmPT7 was originally identified as an arbuscular mycorrhiza-inducible gene of soybean that encodes a member of subfamily I in the PHOSPHATE TRANSPORTER 1 family. In the present study, we established conditions under which a number of dwarf soybean plants complete their life cycles in a growth chamber. Using this system, we grew transgenic soybean with a GmPT7 promoter-β-glucuronidase fusion gene and evaluated GmPT7 expression in detail. GmPT7 was highly expressed in mature, but not in collapsed, arbuscule-containing cortical cells, suggesting its importance in the absorption of fungus-derived phosphate and/or arbuscule development...
December 2014: Plant & Cell Physiology
https://www.readbyqxmd.com/read/24928491/characterization-of-five-subgroups-of-the-sieve-element-occlusion-gene-family-in-glycine-max-reveals-genes-encoding-non-forisome-p-proteins-forisomes-and-forisome-tails
#17
Sascia Zielonka, Antonia M Ernst, Susan Hawat, Richard M Twyman, Dirk Prüfer, Gundula A Noll
P-proteins are structural phloem proteins discussed to be involved in the rapid sealing of injured sieve elements. P-proteins are found in all dicotyledonous and some monocotyledonous plants, but additional crystalloid P-proteins, known as forisomes, have evolved solely in the Fabaceae. Both types are encoded by members of the sieve element occlusion (SEO) gene family, which comprises seven phylogenetic subgroups. The Fabaceae-specific subgroup 1 contains genes encoding forisome subunits in e.g. Medicago truncatula, Vicia faba, Dipteryx panamensis and Canavalia gladiata whereas basal subgroup 5 encodes P-proteins in Nicotiana tabacum (tobacco) and Arabidopsis thaliana...
September 2014: Plant Molecular Biology
https://www.readbyqxmd.com/read/24816291/estimating-the-number-and-size-of-phloem-sieve-plate-pores-using-longitudinal-views-and-geometric-reconstruction
#18
Philippe Bussières
Because it is difficult to obtain transverse views of the plant phloem sieve plate pores, which are short tubes, to estimate their number and diameters, a method based on longitudinal views is proposed. This method uses recent methods to estimate the number and the sizes of approximately circular objects from their images, given by slices perpendicular to the objects. Moreover, because such longitudinal views are obtained from slices that are rather close to the plate centres whereas the pore size may vary with the pore distance from the plate edge, a sieve plate reconstruction model was developed and incorporated in the method to consider this bias...
May 12, 2014: Scientific Reports
https://www.readbyqxmd.com/read/24765096/evaluation-of-constitutive-iron-reductase-atfro2-expression-on-mineral-accumulation-and-distribution-in-soybean-glycine-max-l
#19
Marta W Vasconcelos, Thomas E Clemente, Michael A Grusak
Iron is an important micronutrient in human and plant nutrition. Adequate iron nutrition during crop production is central for assuring appropriate iron concentrations in the harvestable organs, for human food or animal feed. The whole-plant movement of iron involves several processes, including the reduction of ferric to ferrous iron at several locations throughout the plant, prior to transmembrane trafficking of ferrous iron. In this study, soybean plants that constitutively expressed the AtFRO2 iron reductase gene were analyzed for leaf iron reductase activity, as well as the effect of this transgene's expression on root, leaf, pod wall, and seed mineral concentrations...
2014: Frontiers in Plant Science
https://www.readbyqxmd.com/read/24514152/comparative-metabolite-profiling-of-foxglove-aphids-aulacorthum-solani-kaltenbach-on-leaves-of-resistant-and-susceptible-soybean-strains
#20
Dan Sato, Masahiro Sugimoto, Hiromichi Akashi, Masaru Tomita, Tomoyoshi Soga
Aphid infestations can cause severe decreases in soybean (Glycine max [L.] Merr.) yield. Since planting aphid-resistant soybean strains is a promising approach for pest control, understanding the resistance mechanisms employed by aphids is of considerable importance. We compared aphid resistance in seven soybean strains and found that strain Tohoku149 was the most resistant to the foxglove aphid, Aulacorthum solani Kaltenbach. We subsequently analyzed the metabolite profiles of aphids cultured on the leaves of resistant and susceptible soybean strains using capillary electrophoresis-time-of-flight mass spectrometry...
April 2014: Molecular BioSystems
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