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https://www.readbyqxmd.com/read/28091614/transcriptomic-basis-for-drought-resistance-in-brassica-napus-l
#1
Pei Wang, Cuiling Yang, Hao Chen, Chunpeng Song, Xiao Zhang, Daojie Wang
Based on transcriptomic data from four experimental settings with drought-resistant and drought-sensitive cultivars under drought and well-watered conditions, statistical analysis revealed three categories encompassing 169 highly differentially expressed genes (DEGs) in response to drought in Brassica napus L., including 37 drought-resistant cultivar-related genes, 35 drought-sensitive cultivar-related genes and 97 cultivar non-specific ones. We provide evidence that the identified DEGs were fairly uniformly distributed on different chromosomes and their expression patterns are variety specific...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28090264/drought-stress-induced-changes-of-micrornas-in-diploid-and-autotetraploid-paulownia-tomentosa
#2
Xibing Cao, Guoqiang Fan, Lin Cao, Minjie Deng, Zhenli Zhao, Suyan Niu, Zhe Wang, Yuanlong Wang
Drought stress adversely affects plant productivity. Growth and timber production of Paulownia trees are limited under drought stress. Changes in gene expression patterns and miRNA in different ploidy of Paulownia tomentosa have been investigated. However, the responses of P. tomentosa to drought stress at the microRNA (miRNA) level have not been reported so far. To identify miRNA candidates and their target genes involved in the drought stress response in diploid and tetraploid P. tomentosa, four small RNA and four degradome libraries from diploid and autotetraploid P...
2017: Genes & Genomics
https://www.readbyqxmd.com/read/28088182/overexpression-of-wheat-ferritin-gene-tafer-5b-enhances-tolerance-to-heat-stress-and-other-abiotic-stresses-associated-with-the-ros-scavenging
#3
Xinshan Zang, Xiaoli Geng, Fei Wang, Zhenshan Liu, Liyuan Zhang, Yue Zhao, Xuejun Tian, Zhongfu Ni, Yingyin Yao, Mingming Xin, Zhaorong Hu, Qixin Sun, Huiru Peng
BACKGROUND: The yield of wheat (Triticum aestivum L.), an important crop, is adversely affected by heat stress in many regions of the world. However, the molecular mechanisms underlying thermotolerance are largely unknown. RESULTS: A novel ferritin gene, TaFER, was identified from our previous heat stress-responsive transcriptome analysis of a heat-tolerant wheat cultivar (TAM107). TaFER was mapped to chromosome 5B and named TaFER-5B. Expression pattern analysis revealed that TaFER-5B was induced by heat, polyethylene glycol (PEG), H2O2 and Fe-ethylenediaminedi(o-hydroxyphenylacetic) acid (Fe-EDDHA)...
January 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28081489/protective-effect-of-chitosan-on-photosynthesis-and-antioxidative-defense-system-in-edible-rape-brassica-rapa-l-in-the-presence-of-cadmium
#4
Haiying Zong, Song Liu, Ronge Xing, Xiaolin Chen, Pengcheng Li
Chitosan (CTS) induces plant tolerance against several abiotic stresses, including salinity and drought exposure. However, the role of CTS in cadmium (Cd)-induced stress amelioration is largely unknown. In the present study, a hydroponic pot experiment was conducted to study the roles of CTS with different molecular weight (Mw) (10kDa,5kDa and 1kDa) in alleviating Cd toxicity in edible rape (Brassica rapa L .). The results showed that Cd stress significantly decreased plant growth, leaf chlorophyll contents and increased the malondialdehyde (MDA) level in rape leaves...
January 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28081280/evaluation-on-the-germplasm-of-maize-zea-mays-l-landraces-from-southwest-china
#5
F B Chen, Q L Yao, H F Liu, P Fang
Because of their local adaptation and economic factors that limit the adoption of commercial hybrids, farmer-saved maize landraces are still grown over a considerable area concentrated in southwest China. To evaluate the potential of using maize landraces, the germplasm characteristics of 96 landraces from southwest China were evaluated at phenotypic, cellular, and molecular levels. The existence of high phenotypic variation and elite germplasm tolerant to low-N, low-P, as well as drought stress was observed...
December 23, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28077082/the-arabidopsis-paralogs-pub46-and-pub48-encoding-u-box-e3-ubiquitin-ligases-are-essential-for-plant-response-to-drought-stress
#6
Guy Adler, Zvia Konrad, Lyad Zamir, Amit Kumar Mishra, Dina Raveh, Dudy Bar-Zvi
BACKGROUND: Plants respond to abiotic stress on physiological, biochemical and molecular levels. This includes a global change in their cellular proteome achieved by changes in the pattern of their protein synthesis and degradation. The ubiquitin-proteasome system (UPS) is a key player in protein degradation in eukaryotes. Proteins are marked for degradation by the proteasome by coupling short chains of ubiquitin polypeptides in a three-step pathway. The last and regulatory stage is catalyzed by a member of a large family of substrate-specific ubiquitin ligases...
January 11, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28074873/the-nac-type-transcription-factor-osnac2-regulates-aba-dependent-genes-and-abiotic-stress-tolerance-in-rice
#7
Jiabin Shen, Bo Lv, Liqiong Luo, Jianmei He, Chanjuan Mao, Dandan Xi, Feng Ming
Plants can perceive environmental changes and respond to external stressors. Here, we show that OsNAC2, a member of the NAC transcription factor family, was strongly induced by ABA and osmotic stressors such as drought and high salt. With reduced yields under drought conditions at the flowering stage, OsNAC2 overexpression lines had lower resistance to high salt and drought conditions. RNAi plants showed enhanced tolerance to high salinity and drought stress at both the vegetative and flowering stages. Furthermore, RNAi plants had improved yields after drought stress...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28073772/a-water-availability-gradient-reveals-the-deficit-level-required-to-affect-traits-in-potted-juvenile-eucalyptus-globulus
#8
Adam B McKiernan, Brad M Potts, Mark J Hovenden, Timothy J Brodribb, Noel W Davies, Thomas Rodemann, Scott A M McAdam, Julianne M O'Reilly-Wapstra
BACKGROUND AND AIMS: Drought leading to soil water deficit can have severe impacts on plants. Water deficit may lead to plant water stress and affect growth and chemical traits. Plant secondary metabolite (PSM) responses to water deficit vary between compounds and studies, with inconsistent reports of changes to PSM concentrations even within a single species. This disparity may result from experimental water deficit variation among studies, and so multiple water deficit treatments are used to fully assess PSM responses in a single species...
January 10, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28071701/simultaneous-abrupt-shifts-in-hydrology-and-fish-assemblage-structure-in-a-floodplain-lake-in-the-central-amazon
#9
Cristhiana P Röpke, Sidinéia Amadio, Jansen Zuanon, Efrem J G Ferreira, Cláudia Pereira de Deus, Tiago H S Pires, Kirk O Winemiller
Combined effects of climate change and deforestation have altered precipitation patterns in the Amazon. This has led to changes in the frequency of extreme events of flood and drought in recent decades and in the magnitude of the annual flood pulse, a phenomenon that influences virtually all aspects of river-floodplain ecosystem dynamics. Analysis of long-term data revealed abrupt and synchronous changes in hydrology and fish assemblage structure of a floodplain lake near the confluence of Amazon and Negro rivers...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070322/carotenoid-profiling-of-the-leaves-of-selected-african-eggplant-accessions-subjected-to-drought-stress
#10
Elias K Mibei, Jane Ambuko, James J Giovannoni, Arnold N Onyango, Willis O Owino
African eggplants (Solanum aethiopicum and S. macrocarpon) are among the most economically important and valuable vegetable and fruit crops. They are a major source of biologically active nutritional substances and metabolites which are essential for plant growth, development, stress adaptation and defense. Among these metabolites are the carotenoids which act as accessory pigments for photosynthesis and precursor to plant hormones. Though African eggplants are known to be resistant to various abiotic stresses, the effect of these stresses on secondary metabolites has not been well defined...
January 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28068898/integrated-mrna-and-microrna-analysis-identifies-genes-and-small-mirna-molecules-associated-with-transcriptional-and-post-transcriptional-level-responses-to-both-drought-stress-and-re-watering-treatment-in-tobacco
#11
Qiansi Chen, Meng Li, Zhongchun Zhang, Weiwei Tie, Xia Chen, Lifeng Jin, Niu Zhai, Qingxia Zheng, Jianfeng Zhang, Ran Wang, Guoyun Xu, Hui Zhang, Pingping Liu, Huina Zhou
BACKGROUND: Drought stress is one of the most severe problem limited agricultural productivity worldwide. It has been reported that plants response to drought-stress by sophisticated mechanisms at both transcriptional and post-transcriptional levels. However, the precise molecular mechanisms governing the responses of tobacco leaves to drought stress and water status are not well understood. To identify genes and miRNAs involved in drought-stress responses in tobacco, we performed both mRNA and small RNA sequencing on tobacco leaf samples from the following three treatments: untreated-control (CL), drought stress (DL), and re-watering (WL)...
January 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28068641/oil-palm-drought-inducible-dreb1-induced-expression-of-dre-crt-and-non-dre-crt-containing-genes-in-lowland-transgenic-tomato-under-cold-and-peg-treatments
#12
Azzreena Mohamad Azzeme, Siti Nor Akmar Abdullah, Maheran Abd Aziz, Puteri Edaroyati Megat Wahab
Dehydration-responsive element binding (DREB) transcription factor plays an important role in controlling the expression of abiotic stress responsive genes. An intronless oil palm EgDREB1 was isolated and confirmed to be a nuclear localized protein. Electrophoretic mobility shift and yeast one-hybrid assays validated its ability to interact with DRE/CRT motif. Its close evolutionary relation to the dicot NtDREB2 suggests a universal regulatory role. In order to determine its involvement in abiotic stress response, functional characterization was performed in oil palm seedlings subjected to different levels of drought severity and in EgDREB1 transgenic tomato seedlings treated by abiotic stresses...
December 27, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28064176/root-xylem-plasticity-to-improve-water-use-and-yield-in-water-stressed-soybean
#13
Silvas J Prince, Mackensie Murphy, Raymond N Mutava, Lorellin A Durnell, Babu Valliyodan, J Grover Shannon, Henry T Nguyen
We tested the hypothesis that increasing the number of metaxylem vessels would enhance the efficiency of water uptake in soybean (Glycine max) and decrease the yield gap in water-limited environments. A panel of 41 soybean accessions was evaluated in greenhouse, rainout shelter, and rain-fed field environments. The metaxylem number influenced the internal capture of CO2 and improved stomatal conductance, enhancing water uptake/use in soybeans exposed to stress during the reproductive stage. We determined that other root anatomical features, such as cortex cell area and the percentage of stele that comprised cortical cells, also affected seed yield under similar growth parameters...
January 7, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28064119/identification-and-expression-analysis-of-the-nac-transcription-factor-family-in-durum-wheat-triticum-turgidum-l-ssp-durum
#14
Mohammed Najib Saidi, Dhawya Mergby, Faiçal Brini
The NAC (NAM, ATAF and CUC) proteins belong to one of the largest plant-specific transcription factor (TF) families and play important roles in plant development processes, response to biotic and abiotic cues and hormone signaling. Our analysis led to the identification of 168 NAC genes in durum wheat, including nine putative membrane-bound TFs and 48 homeologous genes pairs. Phylogenetic analyses of TtNACs along with their Arabidopsis, grape, barley and rice counterparts divided these proteins into 8 phylogenetic groups and allowed the identification of TtNAC-A7, TtNAC-B35, TtNAC-A68, TtNAC-B69 and TtNAC-A43 as homologs of OsNAC1, OsNAC8, OsNTL2, OsNTL5 and ANAC025/NTL14, respectively...
January 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28063186/the-combined-and-separate-impacts-of-climate-extremes-on-the-current-and-future-us-rainfed-maize-and-soybean-production-under-elevated-co2
#15
Zhenong Jin, Qianlai Zhuang, Jiali Wang, Sotirios V Archontoulis, Zachary Zobel, Veerabhadra R Kotamarthi
Heat and drought are two emerging climatic threats to the US maize and soybean production, yet their impacts on yields are collectively determined by the magnitude of climate change and rising atmospheric CO2 concentrations. This study quantifies the combined and separate impacts of high temperature, heat and drought stresses on the current and future US rainfed maize and soybean production, and for the first time characterizes spatial shifts in the relative importance of individual stress. Crop yields are simulated using the Agricultural Production Systems sIMulator (APSIM), driven by high-resolution (12 km) dynamically downscaled climate projections for 1995-2004 and 2085-2094...
January 7, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28062728/characterization-of-six-pht1-members-in-lycium-barbarum-and-their-response-to-arbuscular-mycorrhiza-and-water-stress
#16
Wentao Hu, Haoqiang Zhang, Xiangyu Zhang, Hui Chen, Ming Tang
Phosphorus (P) is vitally important for most plant processes. However, the P available to plants is present in the soil in the form of inorganic phosphate (Pi), and is often present in only limited amounts. Water stress further reduces Pi availability. Previous studies have highlighted the important roles of members of the PHOSPHATE TRANSPORTER 1 (PHT1) family and arbuscular mycorrhizal (AM) associations for Pi acquisition by plants growing in various environments. In order to understand the Pi uptake of Lycium barbarum L, a drought-tolerant ligneous species belonging to the Solanaceae family, we cloned and characterized six L...
January 5, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28062725/capacitive-water-release-and-internal-leaf-water-relocation-delay-drought-induced-cavitation-in-african-maesopsis-eminii
#17
Jackie Epila, Niels J F De Baerdemaeker, Lidewei L Vergeynst, Wouter H Maes, Hans Beeckman, Kathy Steppe
The impact of drought on the hydraulic functioning of important African tree species, like Maesopsis eminii Engl., is poorly understood. To map the hydraulic response to drought-induced cavitation, sole reliance on the water potential at which 50% loss of xylem hydraulic conductivity (ψ50) occurs might be limiting and at times misleading as the value alone does not give a comprehensive overview of strategies evoked by M. eminii to cope with drought. This article therefore uses a methodological framework to study the different aspects of drought-induced cavitation and water relations in M...
January 5, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28056386/h2o2-seed-priming-improves-tolerance-to-salinity-drought-and-their-combined-effect-more-than-mannitol-in-cakile-maritima-when-compared-to-eutrema-salsugineum
#18
Hasna Ellouzi, Souhir Sghayar, Chedly Abdelly
The effect of H2O2 and mannitol seed priming was investigated on plant growth, oxidative stress biomarkers and activities of antioxidant enzymes in leaves of Cakile maritima and Eutrema salsugineum, when exposed to drought and salt stress, either separately applied or combined. Under unprimed conditions, drought severely restricted growth (40% as compared to the control) and redox balance of C. maritima seedlings, whereas E. salsugineum showed these drastic effects under individual salinity (33% as compared to the control)...
December 15, 2016: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28056110/selection-of-reference-genes-for-qrt-pcr-analysis-of-gene-expression-in-stipa-grandis-during-environmental-stresses
#19
Dongli Wan, Yongqing Wan, Qi Yang, Bo Zou, Weibo Ren, Yong Ding, Zhen Wang, Ruigang Wang, Kai Wang, Xiangyang Hou
Stipa grandis P. Smirn. is a dominant plant species in the typical steppe of the Xilingole Plateau of Inner Mongolia. Selection of suitable reference genes for the quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) is important for gene expression analysis and research into the molecular mechanisms underlying the stress responses of S. grandis. In the present study, 15 candidate reference genes (EF1 beta, ACT, GAPDH, SamDC, CUL4, CAP, SNF2, SKIP1, SKIP5, SKIP11, UBC2, UBC15, UBC17, UCH, and HERC2) were evaluated for their stability as potential reference genes for qRT-PCR under different stresses...
2017: PloS One
https://www.readbyqxmd.com/read/28055133/drought-coping-strategies-in-cotton-increased-crop-per-drop
#20
REVIEW
Abid Ullah, Heng Sun, Xiyan Yang, Xianlong Zhang
The growth and yield of many crops, including cotton, are affected by water deficit. Cotton has evolved drought-specific as well as general morpho-physiological, biochemical and molecular responses to drought stress, which are discussed in this review. The key physiological responses against drought stress in cotton, including stomata closing, root development, cellular adaptations, photosynthesis, abscisic acid (ABA) and jasmonic acid (JA) production, and reactive oxygen species (ROS) scavenging, have been identified by researchers...
January 5, 2017: Plant Biotechnology Journal
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