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https://www.readbyqxmd.com/read/28534253/evaluating-the-involvement-and-interaction-of-abscisic-acid-and-mirna156-in-the-induction-of-anthocyanin-biosynthesis-in-drought-stressed-plants
#1
REVIEW
Jorge González-Villagra, Leonid V Kurepin, Marjorie M Reyes-Díaz
ABA is involved in anthocyanin synthesis through the regulation of microRNA156, augmenting the level of expression of anthocyanin synthesis-related genes and, therefore, increasing anthocyanin level. Drought stress is the main cause of agricultural crop loss in the world. However, plants have developed mechanisms that allow them to tolerate drought stress conditions. At cellular level, drought stress induces changes in metabolite accumulation, including increases in anthocyanin levels due to upregulation of the anthocyanin biosynthetic pathway...
May 22, 2017: Planta
https://www.readbyqxmd.com/read/28532149/proteomic-analysis-of-pigeonpea-cajanus-cajan-seeds-reveals-the-accumulation-of-numerous-stress-related-proteins
#2
Hari B Krishnan, Savithry S Natarajan, Nathan W Oehrle, Wesley M Garrett, Omar Darwish
Pigeonpea is one of the major sources of dietary protein for more than a billion people living in South Asia. This hardy legume is often grown in low-input and risk-prone marginal environments. Considerable research effort has been devoted by a global research consortium to develop genomic resources for the improvement of this legume crop. These efforts have resulted in the elucidation of the complete genome sequence of pigeonpea. Despite these developments, little is known about seed proteome of this important crop...
May 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28531967/climate-response-of-oak-quercus-spp-an-evidence-of-a-bioclimatic-boundary-induced-by-the-carpathians
#3
Constantin Nechita, Ionel Popa, Ólafur Eggertsson
Tree-ring information and climate response data were applied to investigate the potential of the Carpathian Mountains to influence tree-growth patterns. Recent studies reveal the importance of constructing a dense spatial network of oak tree-ring chronologies in this area, which may be the key to linking the North Central European and East Mediterranean tree records. We establish sixteen oak (Quercus robur L.) and sessile oak (Quercus petraea (Matt.) Liebl.) site chronologies along a longitudinal gradient (from 22...
May 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531966/how-do-disturbances-and-climate-effects-on-carbon-and-water-fluxes-differ-between-multi-aged-and-even-aged-coniferous-forests
#4
Xuguang Tang, Hengpeng Li, Mingguo Ma, Li Yao, Matthias Peichl, Altaf Arain, Xibao Xu, Michael Goulden
Disturbances and climatic changes significantly affect forest ecosystem productivity, water use efficiency (WUE) and carbon (C) flux dynamics. A deep understanding of terrestrial feedbacks to such effects and recovery mechanisms in forests across contrasting climatic regimes is essential to predict future regional/global C and water budgets, which are also closely related to the potential forest management decisions. However, the resilience of multi-aged and even-aged forests to disturbances has been debated for >60years because of technical measurement constraints...
May 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28527336/title-potassium-application-regulates-nitrogen-metabolism-and-osmotic-adjustment-in-cotton-gossypium-hirsutum-l-functional-leaf-under-drought-stress
#5
Rizwan Zahoor, Wenqing Zhao, Muhammad Abid, Haoran Dong, Zhiguo Zhou
To evaluate the role of potassium (K) in maintaining nitrogen metabolism and osmotic adjustment development of cotton functional leaves to sustain growth under soil drought and rewatering conditions, the plants of two cotton cultivars Siza 3 (low-K sensitive) and Simian 3 (low-K tolerant), were grown under three different K rates (K0, K1, and K2; 0, 150, and 300kgK2Oha(-1), respectively) and exposed to drought stress with 40±5% soil relative water content (SRWC). The drought stress was applied at flowering stage by withholding water for eight days followed by rewatering to a well-watered level (75±5% SRWC)...
May 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28527182/water-for-agriculture-the-convergence-of-sustainability-and-safety
#6
Sarah M Markland, David Ingram, Kalmia E Kniel, Manan Sharma
Agricultural water is a precious and limited resource. Increasingly more water types and sources are being explored for use in irrigation within the United States and across the globe. As outlined in this chapter, the Produce Safety Rule (PSR) in the Food Safety and Modernization Act (FSMA) provide irrigation water standards for application of water to fruits and vegetables consumed raw. These rules for production and use of water will continue to develop and be required as the world experiences aspects of a changing climate including flooding as well as drought conditions...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28527016/chemical-derivatization-of-metabolite-mass-profiling-of-the-recretohalophyte-aeluropus-lagopoides-revealing-salt-stress-tolerance-mechanism
#7
Murali Krishna Paidi, Parinita Agarwal, Prashant More, Pradeep K Agarwal
Plants are the primary producers of food for human being. Their intracellular environment alternation is influenced by abiotic stress factors such as drought, heat and soil salinity. Aeluropus lagopoides is a strong halophyte that grows with ease under high saline muddy banks of creeks of Gujarat, India. To study the response of salinity on metabolite changes in Aeluropus, three treatments, i.e. control, salinity and recovery, were selected for both shoot and root tissue. The cytosolic metabolite state was analysed by molecular chemical derivatization gas chromatography mass profiling...
May 19, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/28526982/pre-drought-priming-sustains-grain-development-under-post-anthesis-drought-stress-by-regulating-the-growth-hormones-in-winter-wheat-triticum-aestivum-l
#8
Muhammad Abid, Yuhang Shao, Sixi Liu, Feng Wang, Jingwen Gao, Dong Jiang, Zhongwei Tian, Tingbo Dai
Drought stress during grain filling is the most yield-damaging to wheat. Pre-drought priming facilitated the wheat plants to sustain grain development against the post-anthesis drought stress by modulating the levels of growth hormones. Post-anthesis drought stress substantially reduces grain yield in wheat (Triticum aestivum L.) due to impaired grain development associated with imbalanced levels of growth hormones. To investigate whether pre-drought priming could sustain grain development in wheat by regulating favorable levels of growth hormones under post-anthesis drought conditions, the plants of a drought-sensitive (Yangmai-16) and drought-tolerant (Luhan-7) wheat cultivar were exposed to a moderate drought stress during tillering (Feekes 2 stage) for priming, and then, a subsequent severe drought stress was applied from 7 to 14 days after anthesis...
May 19, 2017: Planta
https://www.readbyqxmd.com/read/28526850/drought-and-child-mortality-a-meta-analysis-of-small-scale-surveys-from-ethiopia
#9
Tefera Darge Delbiso, Chiara Altare, Jose Manuel Rodriguez-Llanes, Shannon Doocy, Debarati Guha-Sapir
Despite the intuitive connection between drought and mortality, we still lack a sound quantitative synthesis of evidence drawn from the available data. In this study, we estimate the pooled under-five death rates (U5DR) and assess the effect of drought on child death in Ethiopia. Small-scale mortality surveys were searched from the Complex Emergency Database and then aggregated spatially and temporally with drought exposure data from the Global Drought Monitor and food insecurity data from the Famine Early Warning Systems Network...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28523639/association-mapping-of-yield-and-yield-related-traits-under-reproductive-stage-drought-stress-in-rice-oryza-sativa-l
#10
B P Mallikarjuna Swamy, Noraziyah Abd Aziz Shamsudin, Site Noorzuraini Abd Rahman, Ramil Mauleon, Wickneswari Ratnam, Ma Teressa Sta Cruz, Arvind Kumar
BACKGROUND: The identification and introgression of major-effect QTLs for grain yield under drought are some of the best and well-proven approaches for improving the drought tolerance of rice varieties. In the present study, we characterized Malaysian rice germplasm for yield and yield-related traits and identified significant trait marker associations by structured association mapping. RESULTS: The drought screening was successful in screening germplasm with a yield reduction of up to 60% and heritability for grain yield under drought was up to 78%...
December 2017: Rice
https://www.readbyqxmd.com/read/28523013/genome-analysis-of-conserved-dehydrin-motifs-in-vascular-plants
#11
Ahmad A Malik, Michael Veltri, Kelly F Boddington, Karamjeet K Singh, Steffen P Graether
Dehydrins, a large family of abiotic stress proteins, are defined by the presence of a mostly conserved motif known as the K-segment, and may also contain two other conserved motifs known as the Y-segment and S-segment. Using the dehydrin literature, we developed a sequence motif definition of the K-segment, which we used to create a large dataset of dehydrin sequences by searching the Pfam00257 dehydrin dataset and the Phytozome 10 sequences of vascular plants. A comprehensive analysis of these sequences reveals that lysine residues are highly conserved in the K-segment, while the amino acid type is often conserved at other positions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28523007/transcriptomic-identification-of-drought-related-genes-and-ssr-markers-in-sudan-grass-based-on-rna-seq
#12
Yongqun Zhu, Xia Wang, Linkai Huang, Chaowen Lin, Xinquan Zhang, Wenzhi Xu, Jianhua Peng, Zhou Li, Haidong Yan, Fuxiang Luo, Xie Wang, Li Yao, Dandan Peng
Sudan grass (Sorghum sudanense) is an annual warm-season gramineous forage grass that is widely used as pasture, hay, and silage. However, drought stress severely impacts its yield, and there is limited information about the mechanisms of drought tolerance in Sudan grass. In this study, we used next-generation sequencing to identify differentially expressed genes (DEGs) in the Sudan grass variety Wulate No.1, and we developed simple sequence repeat (SSR) markers associated with drought stress. From 852,543,826 raw reads, nearly 816,854,366 clean reads were identified and used for analysis...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28522456/stress-response-gene-expression-reflects-morpho-physiological-responses-to-water-deficit
#13
Wojciech Rymaszewski, Denis Vile, Alexis Bédiée, Myriam Dauzat, Nathalie Luchaire, Dominika Kamrowska, Christine Granier, Jacek Hennig
Acclimation to water deficit (WD) enables plants to maintain growth under unfavorable environmental conditions, although the mechanisms are not completely understood. In this study, the natural variation of long-term acclimation to moderate (MWD) and severe (SWD) soil water deficits was investigated in 18 Arabidopsis accessions using PHENOPSIS, an automated phenotyping platform. Soil water content was adjusted at an early stage of plant development and maintained at a constant level until reproductive age was achieved...
May 18, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28521387/structural-and-functional-recovery-of-macroinvertebrate-communities-and-leaf-litter-decomposition-after-a-marked-drought-does-vegetation-type-matter
#14
Silvia Monroy, Aingeru Martínez, Naiara López-Rojo, Ana Victoria Pérez-Calpe, Ana Basaguren, Jesús Pozo
Climate change and anthropogenic disturbances are expected to lead to more intense and frequent droughts, with potentially severe effects on structure and function of perennial temperate streams. However, more information is required on whether streams flowing through basins already affected by exotic plantations will respond to droughts in the same way as streams under native forests. The recolonisation dynamics of benthic macroinvertebrate communities and leaf litter decomposition rates were examined in nine streams of oceanic-temperate climate that differed in catchment vegetation (three streams draining native deciduous forest, three in pine plantations and three in eucalypt plantations) after a marked drought...
May 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28516140/comprehensive-list-of-metabolites-measured-by-di-fticr-mass-spectrometry-in-thyme-plants-with-contrasting-tolerance-to-drought
#15
Parviz Moradi, Brian Ford-Lloyd, Jeremy Pritchard
This article contains data related to the main research entitled "Metabolomic approach reveals the biochemical mechanisms underlying drought stress tolerance in Thyme" (Moradi et al., 2017) [1]. Two thyme populations with contrasting drought tolerance were subjected to long term water deficit. Leaf samples harvested at the end of stress period and bi-phasic extraction carried out to get polar and non-polar fractions. Extracted samples were analyzed through Direct Infusion FT-ICR mass spectrometry. Date files comprise of four separate tables for all the putatively identified metabolites and their intensities in watered and droughted plants...
June 2017: Data in Brief
https://www.readbyqxmd.com/read/28515887/bottom-up-and-top-down-effects-of-tree-species-diversity-on-leaf-insect-herbivory
#16
Bastien Castagneyrol, Damien Bonal, Maxime Damien, Hervé Jactel, Céline Meredieu, Evalyne W Muiruri, Luc Barbaro
The diversity of plant neighbors commonly results in direct, bottom-up effects on herbivore ability to locate their host, and in indirect effects on herbivores involving changes in plant traits and a top-down control by their enemies. Yet, the relative contribution of bottom-up and top-down forces remains poorly understood. We also lack knowledge on the effect of abiotic constraints such as summer drought on the strength and direction of these effects. We measured leaf damage on pedunculate oak (Quercus robur), alone or associated with birch, pine or both in a long-term tree diversity experiment (ORPHEE), where half of the plots were irrigated while the other half remained without irrigation and received only rainfall...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28514052/shift-in-community-structure-in-an-early-successional-mediterranean-shrubland-driven-by-long-term-experimental-warming-and-drought-and-natural-extreme-droughts
#17
Daijun Liu, Marc Estiarte, Romà Ogaya, Xiaohong Yang, Josep Peñuelas
Global warming and recurring drought are expected to accelerate water limitation for plant communities in semiarid Mediterranean ecosystems and produce directional shifts in structure and composition that are not easily detected, and supporting evidence is scarce. We conducted a long-term (17 years) nocturnal-warming (+0.6 °C) and drought (-40% rainfall) experiment in an early-successional Mediterranean shrubland to study the changes in community structure and composition, contrasting functional groups and dominant species, and the superimposed effects of natural extreme drought...
May 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28511789/salicylic-acid-mediated-growth-physiological-and-proteomic-responses-in-two-wheat-varieties-under-drought-stress
#18
Marisha Sharma, Sunil K Gupta, Baisakhi Majumder, Vivek K Maurya, Farah Deeba, Afroz Alam, Vivek Pandey
Salicylic acid (SA) induced drought tolerance can be a key trait for increasing and stabilizing wheat production. These SA induced traits were studied in two Triticum aestivum L. varieties; drought tolerant, Kundan and drought sensitive, Lok1 under two different water deficit regimes: and rehydration at vegetative and flowering stages. SA alleviated the negative effects of water stress on photosynthesis more in Kundan. SA induced defense responses against drought by increasing antioxidative enzymes and osmolytes (proline and total soluble sugars)...
May 13, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28511087/optional-use-of-cam-photosynthesis-in-two-c4-species-portulaca-cyclophylla-and-portulaca-digyna
#19
Joseph A M Holtum, Lillian P Hancock, Erika J Edwards, Klaus Winter
Low levels of crassulacean acid metabolism (CAM) are demonstrated in two species with C4 photosynthesis, Portulaca cyclophylla and P. digyna. The expression of CAM in P. cyclophylla and P. digyna is facultative, i.e. optional. Well-watered plants did not accumulate acid at night and exhibited gas-exchange patterns consistent with C4 photosynthesis. CAM-type nocturnal acidification was reversible in that it was induced following drought and lost when droughted plants were rewatered. In P. cyclophylla, droughting was accompanied by a small but discernible net uptake of CO2 during the dark, whereas in P...
February 1, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28510631/how-might-edaphic-specialists-in-gypsum-islands-respond-to-climate-change-reciprocal-sowing-experiment-to-infer-local-adaptation-and-phenotypic-plasticity
#20
Ana M Sánchez, Patricia Alonso-Valiente, M José Albert, Adrián Escudero
Background and Aims: Local adaptation and phenotypic plasticity are considered key mechanisms for coping with climate warming, especially for plant species that inhabit island-like habitats. In Spain a complete guild of edaphic specialists, most of them threatened, occurs in gypsum outcrops, but how these species will respond to climate change has received little attention. Methods: A reciprocal sowing experiment was performed to determine the extent of local adaptation and phenotypic plasticity in five gypsophytes with contrasting distributions along a climate gradient...
May 16, 2017: Annals of Botany
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