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https://www.readbyqxmd.com/read/29053962/identification-of-up-regulated-genes-from-the-metal-hyperaccumulator-aquatic-fern-salvinia-minima-baker-in-response-to-lead-exposure
#1
Daniel A Leal-Alvarado, A Martínez-Hernández, C L Calderón-Vázquez, D Uh-Ramos, G Fuentes, J H Ramírez-Prado, L Sáenz-Carbonell, J M Santamaría
Lead (Pb) is one of the most serious environmental pollutants. The aquatic fern Salvinia minima Baker is capable to hyper-accumulate Pb in their tissues. However, the molecular mechanisms involved in its Pb accumulation and tolerance capacity are not fully understood. In order to investigate the molecular mechanisms that are activated by S. minima in response to Pb, we constructed a suppression subtractive hybridization library (SSH) in response to an exposure to 40μM of Pb(NO3)2 for 12h. 365 lead-related differentially expressed sequences tags (ESTs) were isolated and sequenced...
October 16, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29053716/qtl-controlling-grain-filling-under-terminal-drought-stress-in-a-set-of-wild-barley-introgression-lines
#2
Nora Honsdorf, Timothy J March, Klaus Pillen
Drought is a major abiotic stress impeding the yield of cereal crops globally. Particularly in Mediterranean environments, water becomes a limiting factor during the reproductive developmental stage, causing yield losses. The wild progenitor of cultivated barley Hordeum vulgare ssp spontaneum (Hsp) is a potentially useful source of drought tolerance alleles. Wild barley introgression lines like the S42IL library may facilitate the introduction of favorable exotic alleles into breeding material. The complete set of 83 S42ILs was genotyped with the barley 9k iSelect platform in order to complete genetic information obtained in previous studies...
2017: PloS One
https://www.readbyqxmd.com/read/29053587/heat-responsive-photosynthetic-and-signaling-pathways-in-plants-insight-from-proteomics
#3
REVIEW
Xiaoli Wang, Chenxi Xu, Xiaofeng Cai, Quanhua Wang, Shaojun Dai
Heat stress is a major abiotic stress posing a serious threat to plants. Heat-responsive mechanisms in plants are complicated and fine-tuned. Heat signaling transduction and photosynthesis are highly sensitive. Therefore, a thorough understanding of the molecular mechanism in heat stressed-signaling transduction and photosynthesis is necessary to protect crop yield. Current high-throughput proteomics investigations provide more useful information for underlying heat-responsive signaling pathways and photosynthesis modulation in plants...
October 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29052008/genome-wide-analysis-and-expression-profiling-of-pp2c-clade-d-under-saline-and-alkali-stresses-in-wild-soybean-and-arabidopsis
#4
Chao Chen, Yang Yu, Xiaodong Ding, Beidong Liu, Huizi Duanmu, Dan Zhu, Xiaoli Sun, Lei Cao, Zaib-Un-Nisa, Qiang Li, Yanming Zhu
Protein phosphatase 2Cs (PP2Cs) belong to the largest protein phosphatase family in plants. Some members have been described as being negative modulators of plant growth and development, as well as responses to hormones and environmental stimuli. However, little is known about the members of PP2C clade D, which may be involved in the regulation of signaling pathways, especially in response to saline and alkali stresses. Here, we identified 13 PP2C orthologs from the wild soybean (Glycine soja) genome. We examined the sequence characteristics, chromosome locations and duplications, gene structures, and promoter cis-elements of the PP2C clade D genes in Arabidopsis and wild soybean...
October 19, 2017: Protoplasma
https://www.readbyqxmd.com/read/29051772/hyperspectral-image-analysis-techniques-for-the-detection-and-classification-of-the-early-onset-of-plant-disease-and-stress
#5
REVIEW
Amy Lowe, Nicola Harrison, Andrew P French
This review explores how imaging techniques are being developed with a focus on deployment for crop monitoring methods. Imaging applications are discussed in relation to both field and glasshouse-based plants, and techniques are sectioned into 'healthy and diseased plant classification' with an emphasis on classification accuracy, early detection of stress, and disease severity. A central focus of the review is the use of hyperspectral imaging and how this is being utilised to find additional information about plant health, and the ability to predict onset of disease...
2017: Plant Methods
https://www.readbyqxmd.com/read/29051594/reference-genes-validation-in-phenacoccus-solenopsis-under-various-biotic-and-abiotic-stress-conditions
#6
Surjeet Kumar Arya, Gourav Jain, Santosh Kumar Upadhyay, Sarita, Harpal Singh, Sameer Dixit, Praveen Chandra Verma
Real-time PCR (RT-qPCR) expression analysis is a powerful analytical technique, but for normalization of data requires the use of stable reference genes. However, suitable reference genes are still not known in the case of Phenacoccus solenopsis under variable experimental treatments. The present study focused on the identification of stable housekeeping genes as a reference for analysis under different abiotic and biotic factors in P. solenopsis. We analyzed the relative expression of six commonly used candidate reference genes in different developmental stages, host-feeding assay, temperature treatments and field distribution conditions...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29049338/growing-plants-on-oily-nutrient-poor-soil-using-a-native-symbiotic-fungus
#7
Timothy S Repas, D Michael Gillis, Zakia Boubakir, Xiaohui Bao, Gary J Samuels, Susan G W Kaminskyj
The roots of land plants associate with microbes, including fungal symbionts that can confer abiotic stress tolerance. Bitumen extraction following oil-sand surface mining in the Athabasca region of Alberta, Canada removes plant nutrients but leaves a petrochemical residue, making the coarse tailings (CT) hostile to both plants and microbes. We isolated an endophyte strain of the Ascomycete Trichoderma harzianum we call TSTh20-1 (hereafter, TSTh) from a dandelion that was naturally growing on CT. TSTh colonization allowed tomato, wheat, and remediation seed mixtures to germinate and their seedlings to flourish on CT without the use of fertilizer...
2017: PloS One
https://www.readbyqxmd.com/read/29048565/rice-ovate-family-protein-6-regulates-plant-development-and-confers-resistance-to-drought-and-cold-stresses
#8
Yamei Ma, Chao Yang, Yong He, Zhihong Tian, Jianxiong Li, Ramanjulu Sunkar
OVATE family proteins (OFPs) regulate multiple aspects of plant growth and development; however, their roles in responses to abiotic stresses have not yet been studied. Here, we report that rice OsOFP6 regulates growth and development, and alters responses to drought and cold stresses. OsOFP6 is expressed in various tissues and developmental stages. Knock-down of OsOFP6 by RNA interference (RNAi) resulted in semi-dwarf stature, altered grain shape, and shorter lateral roots. OsOFP6 was shown to interfere with auxin in regulating lateral root growth and initiation, as RNAi plants had increased density of lateral roots under IAA (indole-3-acetic acid) treatment...
October 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29047263/cross-talk-between-phosphate-starvation-and-other-environmental-stress-signaling-pathways-in-plants
#9
Dongwon Baek, Hyun Jin Chun, Dae-Jin Yun, Min Chul Kim
The maintenance of inorganic phosphate (Pi) homeostasis is essential for plant growth and yield. Plants have evolved strategies to cope with Pi starvation at the transcriptional, post-transcriptional, and post-translational levels, which maximizes its availability. Many transcription factors, miRNAs, and transporters participate in the Pi starvation signaling pathway where their activities are modulated by sugar and phytohormone signaling. Environmental stresses significantly affect the uptake and utilization of nutrients by plants, but their effects on the Pi starvation response remain unclear...
October 17, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/29046742/complete-genome-sequence-of-paenibacillus-yonginensis-dcy84-t-a-novel-plant-symbiont-that-promotes-growth-via-induced-systemic-resistance
#10
Yeon-Ju Kim, Johan Sukweenadhi, Ji Woong Seok, Chang Ho Kang, Eul-Su Choi, Sathiyamoorthy Subramaniyam, Deok Chun Yang
This article reports the full genome sequence of Paenibacillus yonginensis DCY84(T) (KCTC33428, JCM19885), which is a Gram-positive rod-shaped bacterium isolated from humus soil of Yongin Forest in Gyeonggi Province, South Korea. The genome sequence of strain DCY84(T) provides greater understanding of the Paenibacillus species for practical use. This bacterium displays plant growth promotion via induced systemic resistance of abiotic stresses.
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/29046684/novel-insights-into-mirna-regulation-of-storage-protein-biosynthesis-during-wheat-caryopsis-development-under-drought-stress
#11
Xin-Yu Chen, Yang Yang, Li-Ping Ran, Zhao-di Dong, Er-Jin Zhang, Xu-Run Yu, Fei Xiong
Drought stress is a significant abiotic stress factor that affects wheat yield and quality. MicroRNA (miRNA) plays an important role in regulating caryopsis development in response to drought stress. However, little is known about the expression characteristics of miRNAs and how they regulate protein accumulation in wheat caryopsis under drought stress. To address this, two small RNA libraries of wheat caryopsis under control and drought stress conditions were constructed and sequenced. A total of 125 miRNAs were identified in the two samples, of which 110 were known and 15 were novel...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29046678/kunitz-proteinase-inhibitors-limit-water-stress-responses-in-white-clover-trifolium-repens-l-plants
#12
Afsana Islam, Susanna Leung, Aluh Nikmatullah, Paul P Dijkwel, Michael T McManus
The response of plants to water deficiency or drought is a complex process, the perception of which is triggered at the molecular level before any visible morphological responses are detected. It was found that different groups of plant proteinase inhibitors (PIs) are induced and play an active role during abiotic stress conditions such as drought. Our previous work with the white clover (Trifolium repens L.) Kunitz Proteinase Inhibitor (Tr-KPI) gene family showed that Tr-KPIs are differentially regulated to ontogenetic and biotic stress associated cues and that, at least some members of this gene family may be required to maintain cellular homeostasis...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29044610/molecular-improvement-of-alfalfa-for-enhanced-productivity-and-adaptability-in-a-changing-environment
#13
REVIEW
Stacy D Singer, Abdelali Hannoufa, Surya Acharya
Due to an expanding world population and increased buying power, the demand for ruminant products such as meat and milk is expected to grow substantially in coming years and high levels of forage crop production will therefore be a necessity. Unfortunately, urbanization of agricultural land, intensive agricultural practices, and climate change are all predicted to limit crop production in the future, which means that the development of forage cultivars with improved productivity and adaptability will be essential...
October 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29044557/rice-phytoglobin-regulate-responses-under-low-mineral-nutrients-and-abiotic-stresses-in-arabidopsis-thaliana
#14
Alka Shankar, Joel Lars Fernandes, Kanwaljeet Kaur, Manisha Sharma, Suman Kundu, Girdhar K Pandey
Just like animals, plants also contain haemoglobins (known as phytoglobins in plants). Plant phytoglobins (Pgbs) have been categorized into six different classes viz. Phytogb0 (Pgb0), Phytogb1 (Pgb1), Phytogb2 (Pgb2), SymPhytogb (sPgb), Leghemoglobin (Lb) and Phytogb3 (Pgb3). Among the 6 Phytogbs, sPgb and Lb have been functionally characterized and the understanding of roles of other Pgbs is still evolving. In our present study, we have explored the function of two rice Pgbs (OsPgb1.1 and OsPgb1.2). OsPgb1...
October 17, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29044167/impact-of-heavy-metal-lead-stress-on-polyamine-levels-in-halomonas-bvr-1-isolated-from-an-industry-effluent
#15
Manasi, Sridev Mohapatra, N Rajesh, Vidya Rajesh
In living systems, environmental stress due to biotic and abiotic factors triggers the production of myriad metabolites as a potential mechanism for combating stress. Among these metabolites are the small polycationic aliphatic amine molecules - polyamines, which are ubiquitous in all living organisms. In this work, we demonstrate a correlation between cellular concentration of three major polyamines (putrescine, spermidine and spermine) with lead exposure on bacteria for a period of 6-24 h. We report that indigenously isolated Halomonas sp...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29043028/enhanced-effects-of-biotic-interactions-on-predicting-multispecies-spatial-distribution-of-submerged-macrophytes-after-eutrophication
#16
Kun Song, Yichong Cui, Xijin Zhang, Yingji Pan, Junli Xu, Kaiqin Xu, Liangjun Da
Water eutrophication creates unfavorable environmental conditions for submerged macrophytes. In these situations, biotic interactions may be particularly important for explaining and predicting the submerged macrophytes occurrence. Here, we evaluate the roles of biotic interactions in predicting spatial occurrence of submerged macrophytes in 1959 and 2009 for Dianshan Lake in eastern China, which became eutrophic since the 1980s. For the four common species occurred in 1959 and 2009, null species distribution models based on abiotic variables and full models based on both abiotic and biotic variables were developed using generalized linear model (GLM) and boosted regression trees (BRT) to determine whether the biotic variables improved the model performance...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29042518/evolutionary-genomics-of-grape-vitis-vinifera-ssp-vinifera-domestication
#17
Yongfeng Zhou, Mélanie Massonnet, Jaleal S Sanjak, Dario Cantu, Brandon S Gaut
We gathered genomic data from grapes (Vitis vinifera ssp. vinifera), a clonally propagated perennial crop, to address three ongoing mysteries about plant domestication. The first is the duration of domestication; archaeological evidence suggests that domestication occurs over millennia, but genetic evidence indicates that it can occur rapidly. We estimated that our wild and cultivated grape samples diverged ∼22,000 years ago and that the cultivated lineage experienced a steady decline in population size (Ne ) thereafter...
October 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29040774/assessing-the-between-background-stability-of-metabolic-effects-arising-from-lignin-related-transgenic-modifications-in-two-populus-hybrids-using-non-targeted-metabolomics
#18
Andrew R Robinson, Rebecca Dauwe, Shawn D Mansfield
The advances in 'high-throughput' biology have significantly expanded our fundamental understanding of complex biological processes inherent to tree growth and development. Relative to the significant achievements attained with whole genome re-sequencing and transcriptomics efforts, the development and power of post-transcriptional tools such as proteomics and metabolomics continue to lag behind in tree biology. However, the inclusion of these powerful functional genomics platforms should substantially enable systems biology assessments of tree development, physiology and response(s) to biotic and abiotic stresses...
October 10, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29040588/glyphosate-resistance-and-epsps-gene-duplication-convergent-evolution-in-multiple-plant-species
#19
Eric L Patterson, Dean J Pettinga, Karl Ravet, Paul Neve, Todd A Gaines
One of the increasingly widespread mechanisms of resistance to the herbicide glyphosate is copy number variation (CNV) of the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene. EPSPS gene duplication has been reported in eight weed species, ranging from 3-5 extra copies to more than 150 extra copies. In the case of Palmer amaranth (Amaranthus palmeri), a section of >300 kb containing EPSPS and many other genes has been replicated and inserted at new loci throughout the genome, resulting in significant increase in total genome size...
October 10, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/29039783/quantitative-phosphoproteomic-analysis-provides-insight-into-the-response-to-short-term-drought-stress-in-ammopiptanthus-mongolicus-roots
#20
Huigai Sun, Bolin Xia, Xue Wang, Fei Gao, Yijun Zhou
Drought is one of the major abiotic stresses that negatively affects plant growth and development. Ammopiptanthus mongolicus is an ecologically important shrub in the mid-Asia desert region and used as a model for abiotic tolerance research in trees. Protein phosphorylation participates in the regulation of various biological processes, however, phosphorylation events associated with drought stress signaling and response in plants is still limited. Here, we conducted a quantitative phosphoproteomic analysis of the response of A...
October 17, 2017: International Journal of Molecular Sciences
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