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https://www.readbyqxmd.com/read/28549191/maintenance-of-phosphate-homeostasis-and-root-development-are-coordinately-regulated-by-myb1-an-r2r3-type-myb-transcription-factor-in-rice
#1
Mian Gu, Jun Zhang, Huanhuan Li, Daqian Meng, Ran Li, Xiaoli Dai, Shichao Wang, Wei Liu, Hongye Qu, Guohua Xu
The adaptive responses of plants to phosphate (Pi) starvation stress are fine-tuned by an elaborate regulatory network. In this study, we identified and characterized a novel Pi starvation-responsive gene, MYB1, encoding an R2R3-type transcription factor in rice. MYB1 was transcriptionally induced in leaf sheaths and old leaf blades. It was localized to the nucleus and expressed mainly in vascular tissues. Mutation of MYB1 led to an increase in Pi uptake and accumulation, accompanied by altered expression of a subset of Pi transporters and several genes involved in Pi starvation signaling...
May 26, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28548657/the-endobacterium-of-an-arbuscular-mycorrhizal-fungus-modulates-the-expression-of-its-toxin-antitoxin-systems-during-the-life-cycle-of-its-host
#2
Alessandra Salvioli di Fossalunga, Justine Lipuma, Francesco Venice, Laurence Dupont, Paola Bonfante
Arbuscular mycorrhizal fungi (AMF) are widespread root symbionts that perform important ecological services, such as improving plant nutrient and water acquisition. Some AMF from the Gigasporaceae family host a population of endobacteria, Candidatus Glomeribacter gigasporarum (Cagg). The analysis of the Cagg genome identified six putative toxin-antitoxin modules (TAs), consisting of pairs of stable toxins and unstable antitoxins that affect diverse physiological functions. Sequence analysis suggested that these TA modules were acquired by horizontal transfer...
May 26, 2017: ISME Journal
https://www.readbyqxmd.com/read/28547813/salix-arctica-changes-root-distribution-and-nutrient-uptake-in-response-to-subsurface-nutrients-in-high-arctic-deserts
#3
Amanda L Guy, Sarah P Hardy, Steven D Mamet, Mitsuaki Ota, Eric G Lamb, Steven D Siciliano
Moisture is critical for plant success in polar deserts but not by the obvious pathway of reduced water stress. We hypothesized that an indirect, nutrient-linked, pathway resulting from unique water/frozen soil interactions in polar deserts creates nutrient-rich patches critical for plant growth. These nutrient-rich patches (diapirs) form deep in high arctic polar deserts soils from water accumulating at the permafrost freezing front and ultimately rising into the upper soil horizons through cryoturbated convective landforms (frost boils)...
May 26, 2017: Ecology
https://www.readbyqxmd.com/read/28547568/biofertilizers-and-sustainable-agriculture-exploring-arbuscular-mycorrhizal-fungi
#4
REVIEW
Nicholas O Igiehon, Olubukola O Babalola
Worldwide agricultural food production has to double in 2050 so as to feed the global increasing population while reducing dependency on conventional chemical fertilizers plus pesticides. To accomplish this objective, there is the need to explore the several mutualistic interactions between plant roots and rhizosphere microbiome. Biofertilization is the process of boosting the abundance of microorganisms such as arbuscular mycorrhizal fungi (AMF) in the natural plant rhizosphere which depicts a beneficial alternative to chemical fertilization practices...
May 25, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28547567/effects-of-electron-acceptors-on-sulphate-reduction-activity-in-activated-sludge-processes
#5
Francisco Rubio-Rincón, Carlos Lopez-Vazquez, Laurens Welles, Tessa van den Brand, Ben Abbas, Mark van Loosdrecht, Damir Brdjanovic
The concentration of sulphate present in wastewater can vary from 10 to 500 mg SO4(2-)/L. During anaerobic conditions, sulphate is reduced to sulphide by sulphate-reducing bacteria (SRB). Sulphide generation is undesired in wastewater treatment plants (WWTPs). Previous research indicated that SRB are inhibited by the presence of electron acceptors (such as O2, NO3 and NO2). However, the contact times and concentrations used in those studies are by far higher than occur in WWTPs. Since sulphide can influence the biological nitrogen and phosphorus removal processes, this research aimed to understand how the different electron acceptors commonly present in biological nutrient removal (BNR) systems can affect the proliferation of SRB...
May 25, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28547371/improvement-of-aquaponic-performance-through-micro-and-macro-nutrient-addition
#6
Dongyun Ru, Jikai Liu, Zhen Hu, Yina Zou, Liping Jiang, Xiaodian Cheng, Zhenting Lv
Aquaponics is one of the "zero waste" industry in the twenty-first century, and is considered to be one of the major trends for the future development of agriculture. However, the low nitrogen utilization efficiency (NUE) restricted its widely application. To date, many attempts have been conducted to improve its NUE. In the present study, effect of micro- and macro-nutrient addition on performance of tilapia-pak choi aquaponics was investigated. Results showed that the addition of micro- and macro-nutrients improved the growth of plant directly and facilitated fish physiology indirectly, which subsequently increased NUE of aquaponics from 40...
May 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28546829/vinasse-fertirrigation-alters-soil-resistome-dynamics-an-analysis-based-on-metagenomic-profiles
#7
Lucas P P Braga, Rafael F Alves, Marina T F Dellias, Acacio A Navarrete, Thiago O Basso, Siu M Tsai
Every year around 300 Gl of vinasse, a by-product of ethanol distillation in sugarcane mills, are flushed into more than 9 Mha of sugarcane cropland in Brazil. This practice links fermentation waste management to fertilization for plant biomass production, and it is known as fertirrigation. Here we evaluate public datasets of soil metagenomes mining for changes in antibiotic resistance genes (ARGs) of soils from sugarcane mesocosms repeatedly amended with vinasse. The metagenomes were annotated using the ResFam database...
2017: BioData Mining
https://www.readbyqxmd.com/read/28546156/ancestral-alliances-plant-mutualistic-symbioses-with-fungi-and-bacteria
#8
REVIEW
Francis M Martin, Stéphane Uroz, David G Barker
Within the plant microbiota, mutualistic fungal and bacterial symbionts are striking examples of microorganisms playing crucial roles in nutrient acquisition. They have coevolved with their hosts since initial plant adaptation to land. Despite the evolutionary distances that separate mycorrhizal and nitrogen-fixing symbioses, these associations share a number of highly conserved features, including specific plant symbiotic signaling pathways, root colonization strategies that circumvent plant immune responses, functional host-microbe interface formation, and the central role of phytohormones in symbiosis-associated root developmental pathways...
May 26, 2017: Science
https://www.readbyqxmd.com/read/28545396/transcriptomic-resources-for-the-medicinal-legume-mucuna-pruriens-de-novo-transcriptome-assembly-annotation-identification-and-validation-of-est-ssr-markers
#9
N Sathyanarayana, Ranjith Kumar Pittala, Pankaj Kumar Tripathi, Ratan Chopra, Heikham Russiachand Singh, Vikas Belamkar, Pardeep Kumar Bhardwaj, Jeff J Doyle, Ashley N Egan
BACKGROUND: The medicinal legume Mucuna pruriens (L.) DC. has attracted attention worldwide as a source of the anti-Parkinson's drug L-Dopa. It is also a popular green manure cover crop that offers many agronomic benefits including high protein content, nitrogen fixation and soil nutrients. The plant currently lacks genomic resources and there is limited knowledge on gene expression, metabolic pathways, and genetics of secondary metabolite production. Here, we present transcriptomic resources for M...
May 25, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28545373/modulation-of-aquaporins-by-dietary-patterns-and-plant-bioactive-compounds
#10
Piero Portincasa, Ilaria Cataldo, Anna Maggio, Patrizia Gena, Ornella de Bari, Grazia Tamma, Piero Portincasa, Calamita Giuseppe
Healthful dietary patterns and bioactive compounds supplementation can be adopted as simple and easy intervention to prevent, attenuate or cure clinical disorders, especially when it comes degenerative and chronic diseases. In the recent years, a growing body of evidence indicates Aquaporins (AQPs), a family of membrane channel proteins widely expressed in the human body, among the targets underlying the beneficial action played by some food nutrients and phytochemical compounds. Here, we provide an overview of what is known regarding the AQP modulation exerted by healthful dietary patterns and plant polyphenols...
May 23, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28545065/influence-of-the-ferric-uptake-regulator-fur-protein-on-pathogenicity-in-pectobacterium-carotovorum-subsp-brasiliense
#11
Collins Kipngetich Tanui, Divine Yutefar Shyntum, Stefan Louis Priem, Jacques Theron, Lucy Novungayo Moleleki
Iron is an important nutrient for the survival and growth of many organisms. In order to survive, iron uptake from the environment must be strictly regulated and maintained to avoid iron toxicity. The ferric uptake regulator protein (Fur) regulates genes involved in iron homeostasis in many bacteria, including phytopathogens. However, to date, the role played by Fur in the biology of Pectobacterium carotovorum subsp. brasiliense (Pcb1692), an important pathogen of potatoes, has not yet been studied. To this end, we used the lambda recombineering method to generate a fur mutant strain of Pcb1692 and assessed the virulence and fitness of the mutant strain...
2017: PloS One
https://www.readbyqxmd.com/read/28543034/changes-in-mineral-elements-and-starch-quality-of-grains-during-the-improvement-of-japonica-rice-cultivars
#12
Hao Zhang, Chao Yu, Danping Hou, Hailang Liu, Huiting Zhang, Rongrong Tao, Han Cai, Junfei Gu, Lijun Liu, Zujian Zhang, Zhiqin Wang, Jianchang Yang
BACKGROUND: The rice cultivars improvement plays an important role in yield increase. However, little is known about the changes in starch quality and mineral elements during the rice cultivars improvement. This study was conducted to investigate the japonica rice cultivars changes in starch quality and mineral elements. RESULTS: 12 typical rice cultivars, applied in the production in Jiangsu province during the last 60 years, were grown in the paddy fields. These cultivars were classified into six types according to their application times, plant types and genotypes...
May 25, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28542547/determination-of-diagnostic-standards-on-saturated-soil-extracts-for-cut-roses-grown-in-greenhouses
#13
John Jairo Franco-Hermida, María Fernanda Quintero, Raúl Iskander Cabrera, José Miguel Guzman
This work comprises the theoretical determination and validation of diagnostic standards for the analysis of saturated soil extracts for cut rose flower crops (Rosa spp.) growing in the Bogota Plateau, Colombia. The data included 684 plant tissue analyses and 684 corresponding analyses of saturated soil extracts, all collected between January 2009 and June 2013. The tissue and soil samples were selected from 13 rose farms, and from cultivars grafted on the 'Natal Briar' rootstock. These concurrent samples of soil and plant tissues represented 251 production units (locations) of approximately 10,000 m2 distributed across the study area...
2017: PloS One
https://www.readbyqxmd.com/read/28542446/wheat-root-length-and-not-branching-is-altered-in-the-presence-of-neighbours-including-blackgrass
#14
Jessica A Finch, Gaëtan Guillaume, Stephanie A French, Renato D D R Colaço, Julia M Davies, Stéphanie M Swarbreck
The effect of neighbouring plants on crop root system architecture may directly interfere with water and nutrient acquisition, yet this important and interesting aspect of competition remains poorly understood. Here, the effect of the weed blackgrass (Alopecurus myosuroides Huds.) on wheat (Triticum aestivum L.) roots was tested, since a low density of this species (25 plants m-2) can lead to a 10% decrease in wheat yield and herbicide resistance is problematic. We used a simplified growth system based on gelled medium, to grow wheat alongside a neighbour, either another wheat plant, a blackgrass or Brachypodium dystachion individual (a model grass)...
2017: PloS One
https://www.readbyqxmd.com/read/28542282/expression-patterns-of-members-of-the-ethylene-signaling-related-gene-families-in-response-to-dehydration-stresses-in-cassava
#15
Meng Yun Ren, Ren Jun Feng, Hou Rui Shi, Li Fang Lu, Tian Yan Yun, Ming Peng, Xiao Guan, Heng Zhang, Jing Yi Wang, Xi Yan Zhang, Cheng Liang Li, Yan Jun Chen, Peng He, Yin Dong Zhang, Jiang Hui Xie
Drought is the one of the most important environment stresses that restricts crop yield worldwide. Cassava (Manihot esculenta Crantz) is an important food and energy crop that has many desirable traits such as drought, heat and low nutrients tolerance. However, the mechanisms underlying drought tolerance in cassava are unclear. Ethylene signaling pathway, from the upstream receptors to the downstream transcription factors, plays important roles in environmental stress responses during plant growth and development...
2017: PloS One
https://www.readbyqxmd.com/read/28541931/the-role-of-constructed-wetlands-for-biomass-production-within-the-water-soil-waste-nexus
#16
C T Avellan, R Ardakanian, P Gremillion
The use of constructed wetlands for water pollution control has a long standing tradition in urban, peri-urban, rural, agricultural and mining environments. The capacity of wetland plants to take up nutrients and to filter organic matter has been widely discussed and presented in diverse fora and published in hundreds of articles. In an ever increasingly complex global world, constructed wetlands not only play a role in providing safe sanitation in decentralized settings, shelter for biodiversity, and cleansing of polluted sites, in addition, they produce biomass that can be harvested and used for the production of fodder and fuel...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28538814/maize-dry-matter-production-and-macronutrient-extraction-model-as-a-new-approach-for-fertilizer-rate-estimation
#17
Karla V Martins, Durval Dourado-Neto, Klaus Reichardt, José L Favarin, Felipe F Sartori, Guilherme Felisberto, Simone C Mello
Decision support for nutrient application remains an enigma if based on soil nutrient analysis. If the crop could be used as an auxiliary indicator, the plant nutrient status during different growth stages could complement the soil test, improving the fertilizer recommendation. Nutrient absorption and partitioning in the plant are here studied and described with mathematical models. The objective of this study considers the temporal variation of the nutrient uptake rate, which should define crop needs as compared to the critical content in soil solution...
May 22, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28537029/arsenic-accumulation-and-physiological-attributes-of-spinach-in-the-presence-of-amendments-an-implication-to-reduce-health-risk
#18
Muhammad Shahid, Marina Rafiq, Nabeel Khan Niazi, Camille Dumat, Saliha Shamshad, Sana Khalid, Irshad Bibi
The current study examined the effect of calcium (Ca) and ethylenediaminetetraacetic acid (EDTA) on arsenic (As) uptake and toxicity to spinach (Spinacia oleracea) as well as assessed the potential human health risks. Spinach seedlings were exposed to three levels of As (25, 125, and 250 μM) alone or together with three levels of EDTA (25, 125, and 250 μM) and Ca (1, 5, and 10 mM). The effect of EDTA and Ca was assessed in terms of As contents in roots and shoots, hydrogen peroxide production, chlorophyll contents, and lipid peroxidation...
May 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28536785/significance-of-accumulation-of-the-alarmone-p-ppgpp-in-chloroplasts-for-controlling-photosynthesis-and-metabolite-balance-during-nitrogen-starvation-in-arabidopsis
#19
Rina Honoki, Sumire Ono, Akira Oikawa, Kazuki Saito, Shinji Masuda
The regulatory nucleotides, guanosine 5'-triphosphate 3'-diphosphate (pppGpp) and guanosine 5'-diphosphate 3'-diphosphate (ppGpp), were originally identified in Escherichia coli, and control a large set of gene expression and enzyme activities. The (p)ppGpp-dependent control of cell activities is referred to as the stringent response. A growing number of (p)ppGpp synthase/hydrolase homologs have been identified in plants, which are localized in plastids in Arabidopsis thaliana. We recently reported that the Arabidopsis mutant overproducing ppGpp in plastids showed dwarf chloroplasts, and transcript levels in the mutant plastids were significantly suppressed...
May 23, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28536298/papers-of-note-in-nature545-7654
#20
Annalisa M VanHook
This week's articles highlight plant growth responses to nutrients; axonal pathfinding; an unexpected source of tumor niche cells; photosensation in the fly brain; the selectivity of GPCRs for specific G proteins; balancing mTORC signaling; and a connection between gut microbes and brain vasculature malformations.
May 23, 2017: Science Signaling
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