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abiotic stress

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https://www.readbyqxmd.com/read/29679263/molecular-identification-of-gapdhs-in-cassava-highlights-the-antagonism-of-megapcs-and-meatg8s-in-plant-disease-resistance-against-cassava-bacterial-blight
#1
Hongqiu Zeng, Yanwei Xie, Guoyin Liu, Daozhe Lin, Chaozu He, Haitao Shi
MeGAPCs were identified as negative regulators of plant disease resistance, and the interaction of MeGAPCs and MeATG8s was highlighted in plant defense response. As an important enzyme of glycolysis metabolic pathway, glyceraldehyde-3-P dehydrogenase (GAPDH) plays important roles in plant development, abiotic stress and immune responses. Cassava (Manihot esculenta) is most important tropical crop and one of the major food crops, however, no information is available about GAPDH gene family in cassava. In this study, 14 MeGAPDHs including 6 cytosol GAPDHs (MeGAPCs) were identified from cassava, and the transcripts of 14 MeGAPDHs in response to Xanthomonas axonopodis pv manihotis (Xam) indicated their possible involvement in immune responses...
April 20, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29678739/atpase-activity-of-groel-is-dependent-on-groes-and-it-is-response-for-environmental-stress-in-riemerella-anatipestifer
#2
Jibin Liu, Mingshu Wang, Haibo Yi, Mafeng Liu, Dekang Zhu, Ying Wu, Renyong Jia, Kunfeng Sun, Qiao Yang, Shun Chen, Xinxin Zhao, Xiaoyue Chen, Anchun Cheng
Riemerella anatipestifer (Ra) is a serious gram-negative pathogen of birds and can cause considerable economic losses. The survival mechanisms of R. anatipestifer in the host and environment remain largely unknown. Previous results have demonstrated that GroEL is a molecular chaperone and an important component of the response to various stresses in most bacteria. This study focused on whether GroEL is implicated in this process in R. anatipestifer. The 1629 bp groEL is highly conserved among other gram-negative bacteria (levels of sequence similarity > 60%)...
April 17, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29676930/high-value-bioproducts-from-microalgae-strategies-and-progress
#3
Ming-Hua Liang, Jianhua Zhu, Jian-Guo Jiang
Microalgae have been considered as alternative sustainable resources for high-value bioproducts such as lipids (especially triacylglycerides [TAGs]), polyunsaturated fatty acids (PUFAs), and carotenoids, due to their relatively high photosynthetic efficiency, no arable land requirement, and ease of scale-up. It is of great significance to exploit microalgae for the production of high-value bioproducts. How to improve the content or productivity of specific bioproducts has become one of the most urgent challenges...
April 20, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29675814/the-zinc-finger-transcription-factor-zat6-is-essential-for-hydrogen-peroxide-induction-of-anthocyanin-synthesis-in-arabidopsis
#4
Haitao Shi, Guoyin Liu, Yunxie Wei, Zhulong Chan
The accumulation of flavonoids is activated by various abiotic stresses, and the induction of reactive oxygen species (ROS) especially hydrogen peroxide (H2 O2 ) is a general response to abiotic stress in plants. However, the direct link between flavonoids and H2 O2 and underlying mechanism remain elusive. In this study, we found that the concentrations of anthocyanin and flavonoids were significantly induced by H2 O2 treatment. Furthermore, we found that the transcript level of ZINC FINGER of ARABIDOPSIS THALIANA 6 (ZAT6) was significantly activated after exogenous H2 O2 treatment, and modulation of AtZAT6 expression positively affected the concentrations of both anthocyanin and total flavonoids...
April 19, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29674805/ectomycorrhizal-and-endophytic-fungi-associated-with-alnus-glutinosa-growing-in-a-saline-area-of-central-poland
#5
Dominika Thiem, Agnieszka Piernik, Katarzyna Hrynkiewicz
Alnus glutinosa (black alder) is a mycorrhizal pioneer tree species with tolerance to high concentrations of salt in the soil and can therefore be considered to be an important tree for the regeneration of forests areas devastated by excessive salt. However, there is still a lack of information about the ectomycorrhizal fungi (EMF) associated with mature individuals of A. glutinosa growing in natural saline conditions. The main objective of this study was to test the effect of soil salinity and other physicochemical parameters on root tips colonized by EMF, as well as on the species richness and diversity of an EMF community associated with A...
2018: Symbiosis
https://www.readbyqxmd.com/read/29674159/abiotic-factors-affect-the-recruitment-and-biomass-of-perennial-grass-and-evergreen-shrub-seedlings-in-denuded-areas-of-patagonian-monte-rangelands
#6
Tomás Bosco, Mónica Beatriz Bertiller, Analía Lorena Carrera
Assessing the ability of key species to cope with environmental stresses in disturbed areas is an important issue for recovery of degraded arid ecosystem. Our objective was to evaluate the effect of soil moisture, exposure to UV radiation, and presence/absence of litter with different chemistry on soil N, recruitment and biomass of seedlings of perennial grass (Poa ligularis and Nassella tenuis) and evergreen shrub species (Atriplex lampa and Larrea divaricata) in denuded areas. We carried out a microcosm experiment with soil blocks (28 cm depth) sowed with seeds of the target species, subjected to different levels of litter type (perennial grass-evergreen shrub mixture, evergreen shrub mixture, and no litter), UV radiation (near ambient and reduced UV), and soil water (high: 15-25% and low 5-15%)...
April 16, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29673186/identification-expression-analysis-of-the-hsf-family-and-characterization-of-class-a4-in-sedum-alfredii-hance-under-cadmium-stress
#7
Shuang-Shuang Chen, Jing Jiang, Xiao-Jiao Han, Yun-Xing Zhang, Ren-Ying Zhuo
Sedum alfredii Hance, a cadmium (Cd)/zinc (Zn)/lead (Pb) co-hyperaccumulating species, is a promising phytoremediation candidate because it accumulates substantial amounts of heavy metal ions without showing any obvious signs of poisoning. The heat shock transcription factor (Hsf) family plays crucial roles in plant growth, development, and stress responses. Although the roles of some Hsfs in abiotic stress have been well studied in model plants, the Hsf family has not been systematically investigated in heavy metal hyperaccumulators...
April 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29671916/assembly-and-annotation-of-a-draft-genome-sequence-for-glycine-latifolia-a-perennial-wild-relative-of-soybean
#8
Qiong Liu, Sungyul Chang, Glen L Hartman, Leslie L Domier
Glycine latifolia (Benth.) Newell & Hymowitz (2n=40), one of the 27 wild perennial relatives of soybean, possesses genetic diversity and agronomically favorable traits that are lacking in soybean. Here, we report the 939-Mb draft genome assembly of G. latifolia (PI 559298) using exclusively linked-reads sequenced from a single Chromium library. We organized scaffolds into 20 chromosome-scale pseudomolecules utilizing two genetic maps and the Glycine max (L.) Merr. genome sequence. High copy numbers of putative 91-bp centromere-specific tandem repeats were observed in consecutive blocks within predicted pericentromeric regions on several pseudomolecules...
April 19, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29671793/search-for-partner-proteins-of-a-thaliana-immunophilins-involved-in-the-control-of-plant-immunity
#9
Inna A Abdeeva, Gennady V Pogorelko, Liliya G Maloshenok, Maria V Mokrykova, Oksana V Fursova, Sergey A Bruskin
The involvement of plant immunophilins in multiple essential processes such as development, various ways of adapting to biotic and abiotic stresses, and photosynthesis has already been established. Previously, research has demonstrated the involvement of three immunophilin genes ( AtCYP19-1/ROC3 , AtFKBP65/ROF2 , and AtCYP57 ) in the control of plant response to invasion by various pathogens. Current research attempts to identify host target proteins for each of the selected immunophilins. As a result, candidate interactors have been determined and confirmed using a yeast 2-hybrid (Y2H) system for protein⁻protein interaction assays...
April 19, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29671148/identification-of-a-cold-tolerant-locus-in-rice-oryza-sativa-l-using-bulked-segregant-analysis-with-a-next-generation-sequencing-strategy
#10
Jian Sun, Luomiao Yang, Jingguo Wang, Hualong Liu, Hongliang Zheng, Dongwei Xie, Minghui Zhang, Mingfang Feng, Yan Jia, Hongwei Zhao, Detang Zou
BACKGROUND: Cold stress can cause serious abiotic damage that limits the growth, development and yield of rice. Cold tolerance during the booting stage of rice is a key factor that can guarantee a high and stable yield under cold stress. The cold tolerance of rice is controlled by quantitative trait loci (QTLs). Based on the complex genetic basis of cold tolerance in rice, additional efforts are needed to detect reliable QTLs and identify candidate genes. In this study, recombinant inbred lines (RILs) derived from a cross between a cold sensitive variety, Dongnong422, and strongly cold-tolerant variety, Kongyu131, were used to screen for cold-tolerant loci at the booting stage of rice...
April 18, 2018: Rice
https://www.readbyqxmd.com/read/29670640/the-maize-aba-receptors-zmpyl8-9-and-12-facilitate-plant-drought-resistance
#11
Zhenghua He, Junwei Zhong, Xiaopeng Sun, Bingcai Wang, William Terzaghi, Mingqiu Dai
Drought is one of the major abiotic stresses affecting world agriculture. Breeding drought-resistant crops is one of the most important challenges for plant biologists. PYR1/PYL/RCARs , which encode the abscisic acid (ABA) receptors, play pivotal roles in ABA signaling, but how these genes function in crop drought response remains largely unknown. Here we identified 13 PYL family members in maize ( ZmPYL1-13 ). Changes in expression of these genes under different stresses indicated that ZmPYLs played important roles in responding to multiple abiotic stresses...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29670637/a-dreb-like-transcription-factor-from-maize-zea-mays-zmdreb4-1-plays-a-negative-role-in-plant-growth-and-development
#12
Shixue Li, Qian Zhao, Dengyun Zhu, Jingjuan Yu
The DREB (dehydration-responsive element binding)-type transcription factors are classified into six subgroups, named A-1 to A-6. The members of DREB A-1 and A-2 subgroups have been reported to be involved in response to various abiotic stresses. However, there were only a few genes belonging to A-3 to A-6 subgroups to be reported. In this study, we cloned a DREB A-4 subgroup gene from maize ( Zea mays ), ZmDREB4.1 , and analyzed its characteristics and functions. ZmDREB4.1 was expressed in roots, stems, and leaves at very low levels...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29670457/genomic-prediction-applied-to-high-biomass-sorghum-for-bioenergy-production
#13
Amanda Avelar de Oliveira, Maria Marta Pastina, Vander Filipe de Souza, Rafael Augusto da Costa Parrella, Roberto Willians Noda, Maria Lúcia Ferreira Simeone, Robert Eugene Schaffert, Jurandir Vieira de Magalhães, Cynthia Maria Borges Damasceno, Gabriel Rodrigues Alves Margarido
The increasing cost of energy and finite oil and gas reserves have created a need to develop alternative fuels from renewable sources. Due to its abiotic stress tolerance and annual cultivation, high-biomass sorghum ( Sorghum bicolor L. Moench) shows potential as a bioenergy crop. Genomic selection is a useful tool for accelerating genetic gains and could restructure plant breeding programs by enabling early selection and reducing breeding cycle duration. This work aimed at predicting breeding values via genomic selection models for 200 sorghum genotypes comprising landrace accessions and breeding lines from biomass and saccharine groups...
2018: Molecular Breeding: New Strategies in Plant Improvement
https://www.readbyqxmd.com/read/29669021/band-alignment-driven-oxidative-injury-to-the-skin-by-anatase-rutile-mixed-phase-titanium-dioxide-nanoparticles-under-sunlight-exposure
#14
Xiujuan Sun, Yun Chang, Yan Cheng, Yanlin Feng, Haiyuan Zhang
Anatase/rutile mixed-phase titanium dioxide (TiO2) nanoparticles (NPs) have been found in cosmetics and cotton textiles. Once exposed to sunlight, mixed-phase TiO2 NPs are even more toxic to cells than pure phase NPs, however, the underlying mechanism remains unclear. Considering the unique anatase/rutile heterojunction structure existing in mixed-phase NPs, the potent toxicity of mixed-phase TiO2 NPs probably originates from the high reactive oxygen species (ROS) production because the anatase/rutile heterojunction is constituted by the staggered energy bands that facilitate the electron-hole separation at the interface due to the band alignment...
April 12, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29667328/insights-into-the-regulation-of-cbf-cold-signaling-in-plants
#15
REVIEW
Jingyan Liu, Yiting Shi, Shuhua Yang
Cold temperatures, a major abiotic stress, threaten the growth and development of plants worldwide. To cope with this adverse environmental cue, plants from temperate climates have evolved an array of sophisticated mechanisms to acclimate to cold periods, increasing their ability to tolerate freezing stress. Over the last decade, significant progress has been made in determining the molecular mechanisms underpinning cold acclimation following the identification of several pivotal components, including candidates for cold sensors, protein kinases, and transcription factors...
April 18, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29666552/mapping-abiotic-stresses-for-rice-in-africa-drought-cold-iron-toxicity-salinity-and-sodicity
#16
P A J van Oort
Maps of abiotic stresses for rice can be useful for (1) prioritizing research and (2) identifying stress hotspots, for directing technologies and varieties to those areas where they are most needed. Large-scale maps of stresses are not available for Africa. This paper considers four abiotic stresses relevant for rice in Africa (drought, cold, iron toxicity and salinity/sodicity). Maps showing hotspots of the stresses, the countries most affected and total potentially affected area are presented. In terms of relative importance, the study identified drought as the most important stress (33% of rice area potentially affected), followed by iron toxicity (12%) and then cold (7%) and salinity/sodicity (2%)...
April 15, 2018: Field Crops Research
https://www.readbyqxmd.com/read/29666265/an-explainable-deep-machine-vision-framework-for-plant-stress-phenotyping
#17
Sambuddha Ghosal, David Blystone, Asheesh K Singh, Baskar Ganapathysubramanian, Arti Singh, Soumik Sarkar
Current approaches for accurate identification, classification, and quantification of biotic and abiotic stresses in crop research and production are predominantly visual and require specialized training. However, such techniques are hindered by subjectivity resulting from inter- and intrarater cognitive variability. This translates to erroneous decisions and a significant waste of resources. Here, we demonstrate a machine learning framework's ability to identify and classify a diverse set of foliar stresses in soybean [ Glycine max (L...
April 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29666162/two-abscisic-acid-responsive-plastid-lipase-genes-involved-in-jasmonic-acid-biosynthesis-in-arabidopsis-thaliana
#18
Kun Wang, Qiang Guo, John E Froehlich, Hope Lynn Hersh, Agnieszka Zienkiewicz, Gregg A Howe, Christoph Benning
Chloroplast membranes with their unique lipid composition are crucial for photosynthesis. Maintenance of the chloroplast membranes requires finely tuned lipid anabolic and catabolic reactions. Despite the presence of a large number of predicted lipid-degrading enzymes in the chloroplasts, their biological functions remain largely unknown. Recently, we described PLASTID LIPASE1 (PLIP1), a plastid phospholipase A1 that contributes to seed oil biosynthesis. The Arabidopsis thaliana genome encodes two putative PLIP1 paralogs, which we designated PLIP2 and PLIP3...
April 17, 2018: Plant Cell
https://www.readbyqxmd.com/read/29665488/antioxidative-enzymes-and-expression-of-rbcl-gene-as-tools-to-monitor-heavy-metal-related-stress-in-plants
#19
Marta Jaskulak, Agnieszka Rorat, Anna Grobelak, Małgorzata Kacprzak
The aim of the study was to evaluate sensitivity and potential applications of selected biomarkers in phytoremediation under complex heavy metal contamination in Sinapis alba L., Robinia pseudoacacia L. and Lupinus luteus L as a potential tools in effective phytoremediation management. The toxicity assessment was conducted using selected measurement endpoints, both classical and advanced, i.e., germination index, roots length, guaiacol peroxidase activity (GPX), chlorophyll and protein content, the amount of total phenolic compounds (TPC) and level of expression of one of the ribulose-bisphosphate carboxylase genes (rbcL)...
April 14, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29663504/climate-resilient-crops-for-improving-global-food-security-and-safety
#20
EDITORIAL
Om Parkash Dhankher, Christine H Foyer
Food security and the protection of the environment are urgent issues for global society, particularly with the uncertainties of climate change. Changing climate is predicted to have a wide range of negative impacts on plant physiology metabolism, soil fertility and carbon sequestration, microbial activity and diversity that will limit plant growth and productivity, and ultimately food production. Ensuring global food security and food safety will require an intensive research effort across the food chain, starting with crop production and the nutritional quality of the food products...
May 2018: Plant, Cell & Environment
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