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https://www.readbyqxmd.com/read/28342331/drought-stress-obliterates-the-preference-for-ammonium-as-an-n-source-in-the-c4-plant-spartina-alterniflora
#1
Kamel Hessini, Herbert J Kronzucker, Chedly Abdelly, Cristina Cruz
The C4 grass Spartina alterniflora is known for its unique salt tolerance and strong preference for ammonium (NH4(+)) as a nitrogen (N) source. We here examined whether Spartina's unique preference for NH4(+) results in improved performance under drought stress. Manipulative greenhouse experiments were carried out to measure the effects of variable water availability and inorganic N sources on plant performance (growth, photosynthesis, antioxidant, and N metabolism). Drought strongly reduced leaf number and area, plant fresh and dry weight, and photosynthetic activity on all N sources, but the reduction was most pronounced on NH4(+)...
March 9, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28340002/overexpression-of-the-rice-sumo-e3-ligase-gene-ossiz1-in-cotton-enhances-drought-and-heat-tolerance-and-substantially-improves-fiber-yields-in-the-field-under-reduced-irrigation-and-rainfed-conditions
#2
Neelam Mishra, Li Sun, Xunlu Zhu, Jennifer Smith, Anurag Prakash Srivastava, Xiaojie Yang, Necla Pehlivan, Nardana Esmaeili, Hong Luo, Guoxin Shen, Don Jones, Dick Auld, John Burke, Paxton Payton, Hong Zhang
The Arabidopsis SUMO E3 ligase gene AtSIZ1 plays important roles in plant response to abiotic stresses as loss of function in AtSIZ1 leads to increased sensitivity to drought, heat and salt stresses. Overexpression of the AtSIZ1 rice homolog, OsSIZ1, leads to increased heat and drought tolerance in bentgrass, suggesting that the function of the E3 ligase SIZ1 is highly conserved in plants and it plays a critical role in abiotic stress responses. To test the possibility that the SUMO E3 ligase could be used to engineer drought- and heat-tolerant crops, the rice gene OsSIZ1 was overexpressed in cotton...
March 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28339719/the-pepper-wpp-domain-protein-cawdp1-acts-as-a-novel-negative-regulator-of-drought-stress-via-aba-signaling
#3
Chanmi Park, Chae Woo Lim, Woonhee Baek, Jung-Hyun Kim, Sohee Lim, Sang Hyon Kim, Kyung-Nam Kim, Sung Chul Lee
Plants are constantly challenged by various environmental stresses, including high salinity and drought, and they have evolved defense mechanisms to counteract the deleterious effects of these stresses. The plant hormone abscisic acid (ABA) regulates plant growth and developmental processes and mediates abiotic stress responses. Here, we report the identification and characterization of a novel CaWDP1 (Capsicum annuumWPP Domain Protein 1) protein. The expression of CaWDP1 in pepper leaves was induced by ABA, drought, and NaCl treatments, suggesting its role in the abiotic stress response...
February 22, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28338908/metabolite-profiling-of-barley-flag-leaves-under-drought-and-combined-heat-and-drought-stress-reveals-metabolic-qtls-for-metabolites-associated-with-antioxidant-defense
#4
Sven Eduard Templer, Alexandra Ammon, David Pscheidt, Otilia Ciobotea, Christian Schuy, Christopher McCollum, Uwe Sonnewald, Anja Hanemann, Jutta Förster, Frank Ordon, Maria von Korff, Lars Matthias Voll
Barley (Hordeum vulgare L.) is among the most stress-tolerant crops; however, not much is known about the genetic and environmental control of metabolic adaptation of barley to abiotic stresses. We have subjected a genetically diverse set of 81 barley accessions, consisting of Mediterranean landrace genotypes and German elite breeding lines, to drought and combined heat and drought stress at anthesis. Our aim was to (i) investigate potential differences in morphological, physiological, and metabolic adaptation to the two stress scenarios between the Mediterranean and German barley genotypes and (ii) identify metabolic quantitative trait loci (mQTLs)...
March 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338840/differences-in-functional-and-xylem-anatomical-features-allow-cistus-species-to-co-occur-and-cope-differently-with-drought-in-the-mediterranean-region
#5
José M Torres-Ruiz, Hervé Cochard, Elsa Fonseca, Eric Badel, Luiz Gazarini, Margarida Vaz
A significant increase in drought events frequency is predicted for the next decades induced by climate change, potentially affecting plant species mortality rates and distributions worldwide. The main trigger of plant mortality is xylem hydraulic failure due to embolism and induced by the low pressures at which water is transported through xylem. As the Mediterranean basin will be severely affected by climate change, the aim of this study was to provide novel information about drought resistance and tolerance of one of its most widely distributed and common genera as a case study: the genus Cistus...
February 27, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338733/genetic-adaptation-and-phenotypic-plasticity-contribute-to-greater-leaf-hydraulic-tolerance-in-response-to-drought-in-warmer-climates
#6
Chris J Blackman, Michael J Aspinwall, David T Tissue, Paul D Rymer
The ability of plants to maintain an intact water transport system in leaves under drought conditions is intimately linked to survival and can been be seen as adaptive in shaping species climatic limits. Large differences in leaf hydraulic vulnerability to drought are known among species from contrasting climates, yet whether this trait varies among populations within a single species and, furthermore, whether it is altered by changes in growth conditions, remain unclear. We examined intraspecific variation in both leaf water transport capacity (Kleaf) and leaf hydraulic vulnerability to drought (P50leaf) among eight populations of Corymbia calophylla (R...
February 9, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338719/the-legume-mir1514a-modulates-a-nac-transcription-factor-transcript-to-trigger-phasirna-formation-in-response-to-drought
#7
Guadalupe Sosa-Valencia, Miguel Palomar, Alejandra A Covarrubias, José L Reyes
Recent studies have identified microRNAs as post-transcriptional regulators involved in stress responses. miR1514a is a legume microRNA that is induced in response to drought stress in Phaseolus vulgaris (common bean) and shows differential accumulation levels in roots during water deficit in two cultivars with different drought tolerance phenotypes. A recent degradome analysis revealed that miR1514a targets the transcripts of two NAC transcription factors (TFs), Phvul.010g121000 and Phvul.010g120700. Furthermore, expression studies and small RNA-seq data indicate that only Phvul...
October 7, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338609/ectopic-expression-of-aeluropus-littoralis-plasma-membrane-protein-gene-altmp1-confers-abiotic-stress-tolerance-in-transgenic-tobacco-by-improving-water-status-and-cation-homeostasis
#8
Walid Ben Romdhane, Rania Ben-Saad, Donaldo Meynard, Jean-Luc Verdeil, Jalel Azaza, Nabil Zouari, Lotfi Fki, Emmanuel Guiderdoni, Abdullah Al-Doss, Afif Hassairi
We report here the isolation and functional analysis of AlTMP1 gene encoding a member of the PMP3 protein family. In Aeluropus littoralis, AlTMP1 is highly induced by abscisic acid (ABA), cold, salt, and osmotic stresses. Transgenic tobacco expressing AlTMP1 exhibited enhanced tolerance to salt, osmotic, H₂O₂, heat and freezing stresses at the seedling stage. Under greenhouse conditions, the transgenic plants showed a higher level of tolerance to drought than to salinity. Noteworthy, AlTMP1 plants yielded two- and five-fold more seeds than non-transgenic plants (NT) under salt and drought stresses, respectively...
March 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28337209/transcriptional-responses-of-chilean-quinoa-chenopodium-quinoa-willd-under-water-deficit-conditions-uncovers-aba-independent-expression-patterns
#9
Andrea Morales, Andres Zurita-Silva, Jonathan Maldonado, Herman Silva
HIGHLIGHTS R49 genotype displayed best performance on selected physiological parameters and highest tolerance to drought.R49 drought over-represented transcripts has exhibited 19% of genes (306 contigs) that presented no homology to published databases.Expression pattern for canonical responses to drought such as ABA biosynthesis and other genes induced in response to drought were assessed by qPCR. Global freshwater shortage is one of the biggest challenges of our time, often associated to misuse, increased consumption demands and the effects of climate change, paralleled with the desertification of vast areas...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28336950/dual-regulation-of-water-retention-and-cell-growth-by-a-stress-associated-protein-sap-gene-in-prunus
#10
Alba Lloret, Ana Conejero, Carmen Leida, César Petri, Francisco Gil-Muñoz, Lorenzo Burgos, María Luisa Badenes, Gabino Ríos
We have identified a gene (PpSAP1) of Prunus persica coding for a stress-associated protein (SAP) containing Zn-finger domains A20 and AN1. SAPs have been described as regulators of the abiotic stress response in plant species, emerging as potential candidates for improvement of stress tolerance in plants. PpSAP1 was highly expressed in leaves and dormant buds, being down-regulated before bud dormancy release. PpSAP1 expression was moderately induced by water stresses and heat in buds. In addition, it was found that PpSAP1 strongly interacts with polyubiquitin proteins in the yeast two-hybrid system...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335727/overexpression-of-snapdragon-delila-del-gene-in-tobacco-enhances-anthocyanin-accumulation-and-abiotic-stress-tolerance
#11
Aung Htay Naing, Kyeung Il Park, Trinh Ngoc Ai, Mi Young Chung, Jeung Sul Han, Young-Wha Kang, Ki Byung Lim, Chang Kil Kim
BACKGROUND: Rosea1 (Ros1) and Delila (Del) co-expression controls anthocyanin accumulation in snapdragon flowers, while their overexpression in tomato strongly induces anthocyanin accumulation. However, little data exist on how Del expression alone influences anthocyanin accumulation. RESULTS: In tobacco (Nicotiana tabacum 'Xanthi'), Del expression enhanced leaf and flower anthocyanin production through regulating NtCHS, NtCHI, NtF3H, NtDFR, and NtANS transcript levels...
March 23, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28334275/identification-of-a-novel-bzip-transcription-factor-in-camellia-sinensis-as-a-negative-regulator-of-freezing-tolerance-in-transgenic-arabidopsis
#12
Lu Wang, Hongli Cao, Wenjun Qian, Lina Yao, Xinyuan Hao, Nana Li, Yajun Yang, Xinchao Wang
Background and Aims: Basic region/leucine zipper (bZIP) transcription factors play vital roles in the abiotic stress response of plants. However, little is known about the function of bZIP genes in Camellia sinensis . Methods: CsbZIP6 was overexpressed in Arabidopsis thaliana . Effects of CsbZIP6 overexpression on abscisic acid (ABA) sensitivity, freezing tolerance and the expression of cold-responsive genes in arabidopsis were studied. Key Results: CsbZIP6 was induced during cold acclimation in tea plant...
March 14, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28331178/habitat-filtering-and-exclusion-of-weak-competitors-jointly-explain-fern-species-assemblage-along-a-light-and-water-gradient
#13
Hui Zhang, Shidan Zhu, Robert John, Ronghua Li, Hui Liu, Qing Ye
Fern species are an important component of the diversity of forest plant communities, but very little is known about how fern communities assemble in different environments. In this study, we use multiple trait-based tests to examine the relationships between several key eco-physiological traits which are direct indicators of shade and drought tolerance, and the abundance of fern species in pine forest (PF), pine and mixed broad leaf forest (PMBF) and matured broad leaf forest (MBF) in southern China. These forests are characterized by decreasing light but increasing water availability during succession, and the fern communities correspondingly differ in species composition...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330556/microrna156-improves-drought-stress-tolerance-in-alfalfa-medicago-sativa-by-silencing-spl13
#14
Muhammad Arshad, Biruk A Feyissa, Lisa Amyot, Banyar Aung, Abdelali Hannoufa
Alfalfa (Medicago sativa) is an important forage crop that is often grown in areas that frequently experience drought and water shortage. MicroRNA156 (miR156) is an emerging tool for improving various traits in plants. We tested the role of miR156d in drought response of alfalfa, and observed a significant improvement in drought tolerance of miR156 overexpression (miR156OE) alfalfa genotypes compared to the wild type control (WT). In addition to higher survival and reduced water loss, miR156OE genotypes also maintained higher stomatal conductance compared to WT during drought stress...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28330552/ectopic-expression-of-taoep16-2-5b-a-wheat-plastid-outer-envelope-protein-gene-enhances-heat-and-drought-stress-tolerance-in-transgenic-arabidopsis-plants
#15
Xinshan Zang, Xiaoli Geng, Kelu Liu, Fei Wang, Zhenshan Liu, Liyuan Zhang, Yue Zhao, Xuejun Tian, Zhaorong Hu, Yingyin Yao, Zhongfu Ni, Mingming Xin, Qixin Sun, Huiru Peng
Abiotic stresses, such as heat and drought, are major environmental factors restricting crop productivity and quality worldwide. A plastid outer envelope protein gene, TaOEP16-2, was identified from our previous transcriptome analysis [1,2]. In this study, the isolation and functional characterization of the TaOEP16-2 gene was reported. Three homoeologous sequences of TaOEP16-2 were isolated from hexaploid wheat, which were localized on the chromosomes 5A, 5B and 5D, respectively. These three homoeologues exhibited different expression patterns under heat stress conditions, TaOEP16-2-5B was the dominant one, and TaOEP16-2-5B was selected for further analysis...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28330319/roles-of-plant-hormones-and-anti-apoptosis-genes-during-drought-stress-in-rice-oryza-sativa-l
#16
Mohammad Ubaidillah, Fika Ayu Safitri, Jun-Hyeon Jo, Sang-Kyu Lee, Adil Hussain, Bong-Gyu Mun, Il Kyung Chung, Byung-Wook Yun, Kyung-Min Kim
We previously identified the rice (Oryza sativa) senescence-associated gene OsSAP which encodes a highly conserved protein involved in anti-apoptotic activity. This novel Bax suppressor-related gene regulates tolerance to multiple stresses in yeast. Here, we show the effects of drought stress on leaf and root tissues of plants over-expressing OsSAP in relation to the levels of phytohormones, abscisic acid (ABA), jasmonic acid (JA), indole-3-carboxylic acid (ICA), gibberellic acid (GA3), and zeatin. Results showed that rice plants over-expressing SAP were tolerant to drought stress compared to wild type and the plants over-expressing AtBI-1, which is a homolog of the human Bax inhibitor-1 in Arabidopsis...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330293/effect-of-reduced-plant-height-on-drought-tolerance-in-rice
#17
Asadollah Ahmadikhah, Amir Marufinia
Drought stress due to water deficit is a major problem of rice cultivation as a most drought-sensitive crop plant. A rice mutant line (MT58) was developed after mutagenesis of cv. Neda by ethyl methane sulfonate (EMS) and selected for dwarfism (18 cm shorter than Neda). The extent of its molecular changes relative to parental cultivar was assessed by SSR and ISSR markers, and the response of the line along with parental cultivar and another mutant line (MTA) to mild and severe water deficit, was evaluated in a field experiment...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28326315/genomewide-expression-and-functional-interactions-of-genes-under-drought-stress-in-maize
#18
Nepolean Thirunavukkarasu, Rinku Sharma, Nidhi Singh, Kaliyugam Shiriga, Sweta Mohan, Swati Mittal, Shikha Mittal, Mallana Gowdra Mallikarjuna, Atmakuri Ramakrishna Rao, Prasanta Kumar Dash, Firoz Hossain, Hari Shanker Gupta
A genomewide transcriptome assay of two subtropical genotypes of maize was used to observe the expression of genes at seedling stage of drought stress. The number of genes expressed differentially was greater in HKI1532 (a drought tolerant genotype) than in PC3 (a drought sensitive genotype), indicating primary differences at the transcriptional level in stress tolerance. The global coexpression networks of the two genotypes differed significantly with respect to the number of modules and the coexpression pattern within the modules...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28326090/vaerd15-a-transcription-factor-gene-associated-with-cold-tolerance-in-chinese-wild-vitis-amurensis
#19
Dongdong Yu, Lihua Zhang, Kai Zhao, Ruxuan Niu, Huan Zhai, Jianxia Zhang
Early responsive to dehydration (ERD) genes can be rapidly induced to counteract abiotic stresses, such as drought, low temperatures or high salinities. Here, we report on an ERD gene (VaERD15) related to cold tolerance from Chinese wild Vitis amurensis accession 'Heilongjiang seedling'. The full-length VaERD15 cDNA is 685 bp, including a 66 bp 5'-untranslated region (UTR), a 196 bp 3'-UTR region and a 423 bp open reading frame encoding 140 amino acids. The VaERD15 protein shares a high amino acid sequence similarity with ERD15 of Arabidopsis thaliana...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28324190/exogenous-application-of-urea-and-a-urease-inhibitor-improves-drought-stress-tolerance-in-maize-zea-mays-l
#20
Wei Gou, Pufan Zheng, Li Tian, Mei Gao, Lixin Zhang, Nudrat Aisha Akram, Muhammad Ashraf
Drought is believed to cause many metabolic changes which affect plant growth and development. However, it might be mitigated by various inorganic substances, such as nitrogen. Thus, the study was carried out to investigate the effect of foliar-applied urea with or without urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) on a maize cultivar under drought stress simulated by 15% (w/v) polyethylene glycol 6000. Foliar-applied urea resulted in a significant increase in plant dry weight, relative water content, and photosynthetic pigments under water stress condition...
March 21, 2017: Journal of Plant Research
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