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Wheat drought

Ryosuke Mega, Fumitaka Abe, June-Sik Kim, Yuuri Tsuboi, Keisuke Tanaka, Hisato Kobayashi, Yoichi Sakata, Kousuke Hanada, Hisashi Tsujimoto, Jun Kikuchi, Sean R Cutler, Masanori Okamoto
Water availability is a key determinant of terrestrial plant productivity. Many climate models predict that water stress will increasingly challenge agricultural yields and exacerbate projected food deficits. To ensure food security and increase agricultural efficiency, crop water productivity must be increased. Research over past decades has established that the phytohormone abscisic acid (ABA) is a central regulator of water use and directly regulates stomatal opening and transpiration. In this study, we investigated whether the water productivity of wheat could be improved by increasing its ABA sensitivity...
February 2019: Nature Plants
Muhammad Shoaib, Wenlong Yang, Qiangqiang Shan, Muhammad Sajjad, Aimin Zhang
Cytokinins (CKs) are involved in determining the final grain yield in wheat. Multiple gene families are responsible for the controlled production of CKs in plants, including isopentenyl transferases for de novo synthesis, zeatin O-glucosyltransferases for reversible inactivation, β-glucosidases for reactivation, and CK oxidases/dehydrogenases for permanent degradation. Identifying and characterizing the genes of these families is an important step in furthering our understanding of CK metabolism. Using bioinformatics tools, we identified four new TaIPT , four new TaZOG , and 25 new TaGLU genes in common wheat...
2019: PeerJ
Alberto Casartelli, Vanessa J Melino, Ute Baumann, Matteo Riboni, Radoslaw Suchecki, Nirupama S Jayasinghe, Himasha Mendis, Mutsumi Watanabe, Alexander Erban, Ellen Zuther, Rainer Hoefgen, Ute Roessner, Mamoru Okamoto, Sigrid Heuer
Degradation of nitrogen-rich purines is tightly and oppositely regulated under drought and low nitrogen supply in bread wheat. Allantoin is a key target metabolite for improving nitrogen homeostasis under stress. The metabolite allantoin is an intermediate of the catabolism of purines (components of nucleotides) and is known for its housekeeping role in nitrogen (N) recycling and also for its function in N transport and storage in nodulated legumes. Allantoin was also shown to differentially accumulate upon abiotic stress in a range of plant species but little is known about its role in cereals...
February 5, 2019: Plant Molecular Biology
Marianna Rakszegi, Éva Darkó, Alison Lovegrove, István Molnár, László Láng, Zoltán Bedő, Márta Molnár-Láng, Peter Shewry
Wild relatives of wheat, such as Aegilops spp. are potential sources of genes conferring tolerance to drought stress. As drought stress affects seed composition, the main goal of the present study was to determine the effects of drought stress on the content and composition of the grain storage protein (gliadin (Gli), glutenin (Glu), unextractable polymeric proteins (UPP%) and dietary fiber (arabinoxylan, β-glucan) components of hexaploid bread wheat (T. aestivum) lines containing added chromosomes from Ae...
2019: PloS One
Wen-Jing Yang, Yong-Tao Du, Yong-Bin Zhou, Jun Chen, Zhao-Shi Xu, You-Zhi Ma, Ming Chen, Dong-Hong Min
Melatonin (N-acetyl-5-methoxytryptamine) is involved in many developmental processes and responses to various abiotic stresses in plants. Most of the studies on melatonin focus on its functions and physiological responses in plants, while its regulation mechanism remains unknown. Caffeic acid 3-O-methyltransferase (COMT) functions at a key step of the biosynthesis process of melatonin. In this study, a COMT-like gene, TaCOMT (Traes_1AL_D9035D5E0.1) was identified in common wheat ( Triticum aestivum L.). Transient transformation in wheat protoplasts determined that TaCOMT is localized in cytoplasm...
February 2, 2019: International Journal of Molecular Sciences
Sandeep Sharma, Chen Chen, Kusum Khatri, Mangal S Rathore, Shree P Pandey
Water stress severely reduces the production of wheat. Application of seaweed extracts have started to show promise in protecting plants from environmental stresses as they contain several biostimulants. However, the modes of action of these biostimulants are not clear. Here, we investigated the role of Gracilaria dura (GD), a red alga, in conferring stress tolerance to wheat during drought under glasshouse and agro-ecological conditions by integrating molecular studies with physiological and field investigations...
January 16, 2019: Plant Physiology and Biochemistry: PPB
Abdol Rassoul Zarei, Ali Shabani, Mohammad Reza Mahmoudi
Climate change is one of the most important meteorological phenomena that has had a lot of impacts on different sections with different spatial scales. In recent decades, climate changes affected by various factors especially human activities have had various impacts in different sections such as melting glaciers, various flood occurrence, occurrence of different droughts and etc. UNEP aridity Index (UNEP) and Modified De-Martonne index (MDM) are two more used indices to evaluate climate conditions in various regions of the world...
January 18, 2019: Science of the Total Environment
Pasquale Garofalo, Domenico Ventrella, Kurt Christian Kersebaum, Anne Gobin, Miroslav Trnka, Luisa Giglio, Martin Dubrovský, Mirko Castellini
The impact of climate change could undermine the future grain production as a consequence of increased temperature and drought condition or improve the crop performance owing to the increased CO2 in the atmosphere. Wheat water demand and yield are strictly related to climate conditions of the area where the plants are cropped. In this study, we assessed the future trends of grain yield and water consumption in two European regions, Germany (Continental region) and Italy (Mediterranean region) in the light of the multiple sources of uncertainty related to climate and yield forecasts...
March 25, 2019: Science of the Total Environment
Rui Pan, Dongli He, Le Xu, Meixue Zhou, Chengdao Li, Chu Wu, Yanhao Xu, Wenying Zhang
BACKGROUND: Waterlogging is one of the main abiotic stresses that limit wheat production. Quantitative proteomics analysis has been applied in the study of crop abiotic stress as an effective way in recent years (e.g. salt stress, drought stress, heat stress and waterlogging stress). However, only a few proteins related to primary metabolism and signal transduction, such as UDP - glucose dehydrogenase, UGP, beta glucosidases, were reported to response to waterlogging stress in wheat. The differentially expressed proteins between genotypes of wheat in response to waterlogging are less-defined...
January 18, 2019: BMC Genomics
Francisco Ayala, Griselda V Fedrigo, Moises Burachik, Patricia V Miranda
Wheat is the most widely grown cereal grain, occupying a significant portion of the total cultivated land. As drought is the major environmental stressor affecting crop production, yield maintenance under water deficit conditions appears as a highly desirable phenotype for crop improvement. The HaHB4 (Helianthus annuus homeobox 4) gene from sunflower encodes for a transcription factor involved in tolerance to environmental stress. The introduction of HaHB4 in wheat led to the development of event IND-ØØ412-7 (HB4® wheat), which displayed higher yield in production environments of low productivity potential...
January 17, 2019: Transgenic Research
Jingyi Wang, Xinguo Mao, Ruitong Wang, Ang Li, Guangyao Zhao, Jinfeng Zhao, Ruilian Jing
Abiotic stress significantly impacts growth and yield of crop plants. It is imperative for crop improvement to discover and utilize stress-tolerant functional genes. In this study, genes responding to abiotic stresses, such as freezing, salt and osmotic stress, were screened from a cDNA yeast library that was constructed from the drought- and heat-tolerant wheat variety Hanxuan 10. After screening for surviving clones we isolated 7,249, 4,313 and 4,469 raw sequences, corresponding to 4,695, 2,641 and 2,771 genes following each treatment...
January 15, 2019: Scientific Reports
Yongbin Li, Haowen Shi, Haowei Zhang, Sanfeng Chen
Biofertilizer is a good substitute for chemical fertilizer in sustainable agriculture, but its effects are often hindered by drought stress. Super absorbent polymer (SAP), showing good capacity of water absorption and retention, can increase soil moisture. However, limited information is available about the efficiency of biofertilizer amended with SAP. This study was conducted to investigate the effects of synergistic application of SAP and biofertilizers ( Paenibacillus beijingensis BJ-18 and Bacillus sp. L-56) on plant growth, including wheat and cucumber...
2019: PeerJ
Eugenio Llorens, Or Sharon, Gemma Camañes, Pilar García-Agustín, Amir Sharon
Endophytes contribute to plant performance, especially under harsh conditions. We therefore hypothesized that wild plants have retained beneficial endophytes that are less abundant or not present in related crop plants. To test this hypothesis, we selected two endophytes that were found in Sharon goatgrass, an ancestor of wheat, and tested their effect on bread wheat. Both endophytes infected wheat and improved sustainability and performance under water-limited conditions. To determine how the endophytes modify plant development, we measured parameters of plant growth and physiological status and performed a comparative metabolomics analysis...
January 13, 2019: Environmental Microbiology
Jia Zhao, Xu Zhang, Wentao Wan, Heng Zhang, Jia Liu, Mengli Li, Haiyan Wang, Jin Xiao, Xiue Wang
The EXO70 gene family is involved in different biological processes in plants, ranging from plant polar growth to plant immunity. To date, analysis of the EXO70 gene family has been limited in Triticeae species, e.g., hexaploidy Triticum aestivum and its ancestral/related species. By in silico analysis of multiple Triticeae sequence databases, a total of 200 EXO70 members were identified. By homologue cloning approaches, 15 full-length cDNA of EXO70s were cloned from diploid Haynaldia villosa . Phylogenetic relationship analysis of 215 EXO70 members classified them into three groups ( EXO70...
December 24, 2018: International Journal of Molecular Sciences
Heike Lehnert, Albrecht Serfling, Wolfgang Friedt, Frank Ordon
In the majority of wheat growing areas worldwide, the incidence of drought stress has increased significantly resulting in a negative impact on plant development and grain yield. Arbuscular mycorrhizal symbiosis is known to improve drought stress tolerance of wheat. However, quantitative trait loci (QTL) involved in the response to drought stress conditions in the presence of mycorrhizae are largely unknown. Therefore, a diverse set consisting of 94 bread wheat genotypes was phenotyped under drought stress and well watered conditions in the presence and absence of mycorrhizae...
2018: Frontiers in Plant Science
Jamshidi Goharrizi Kiarash, Henry Dayton Wilde, Farzane Amirmahani, Mohammad Mehdi Moemeni, Maryam Zaboli, Maryam Nazari, Sayyed Saeed Moosavi, Mina Jamalvandi
Eight candidate housekeeping genes were examined as internal controls for normalizing expression analysis of durum wheat ( Triticum durum L. ) under drought and salinity stress conditions. Quantitative real-time PCR was used to analyse gene expression of multiple stress levels, plant ages (24 and 50 days old), and plant tissues (leaf and root). The algorithms BestKeeper, NormFinder, GeNorm, the delta Ct method and the RefFinder were applied to determine the stability of candidate genes. Under drought stress, the most stable reference genes were glyceraldehyde-3 phosphate , ubiquitin and β- tubulin2 , whereas under salinity stress conditions, eukaryotic elongation factor 1-α , glyceraldehyde-3 phosphate and actin were identified as the most stable reference genes...
December 2018: Journal of Genetics
Xinbo Wang, Yanhua Xu, Jingjing Li, Yongzhe Ren, Zhiqiang Wang, Zeyu Xin, Tongbao Lin
Drought is a major adversity that limits crop yields. Further exploration of wheat drought tolerance-related genes is critical for the genetic improvement of drought tolerance in this crop. Here, comparative proteomic analysis of two wheat varieties, XN979 and LA379, with contrasting drought tolerance was conducted to screen for drought tolerance-related proteins/genes. Virus-induced gene silencing (VIGS) technology was used to verify the functions of candidate proteins. A total of 335 differentially abundant proteins (DAPs) were exclusively identified in the drought-tolerant variety XN979...
December 12, 2018: International Journal of Molecular Sciences
Rudy Dolferus, Saravanan Thavamanikumar, Harriet Sangma, Sue Kleven, Xiaomei Wallace, Kerrie Forrest, Gregory Rebetzke, Matthew Hayden, Lauren Borg, Alison Smith, Brian Cullis
Water stress during reproductive growth is a major yield constraint for wheat ( Triticum aestivum L). We previously established a controlled environment drought tolerance phenotyping method targeting the young microspore stage of pollen development. This method eliminates stress avoidance based on flowering time. We substituted soil drought treatments by a reproducible osmotic stress treatment using hydroponics and NaCl as osmolyte. Salt exclusion in hexaploid wheat avoids salt toxicity, causing osmotic stress...
December 12, 2018: G3: Genes—Genomes—Genetics
Xiong Deng, Shoumin Zhen, Dongmiao Liu, Yue Liu, Mengfei Li, Nannan Liu, Yueming Yan
Integrated proteome analyses revealed differentially accumulated proteins in the non-leaf green organs in wheat glume and awn that play important roles in photosynthesis and drought resistance. Two non-leaf green organs in wheat, glume and awn, have photosynthetic potential, contribute to grain yield, and also play roles in resistance to adverse conditions. We performed the first integrated proteome analysis of wheat glume and awn in response to water deficit. Water deficit caused a significant decrease in important agronomic traits and grain yield...
November 16, 2018: Journal of Plant Physiology
Fei Luo, Xiong Deng, Yue Liu, Yueming Yan
BACKGROUND: Wheat (Triticum aestivum L.) serves as important grain crop widely cultivated in the world, which is often suffered by drought stress in natural conditions. As one of the most important post translation modifications, protein phosphorylation widely participates in plant abiotic stress regulation. In this study, we performed the first comparative analysis of phosphorylated protein characterization in flag leaves and developing grains of elite Chinese bread wheat cultivar Zhongmai 175 under water deficit by combining with proteomic approach and Pro-Q Diamond gel staining...
December 8, 2018: Botanical Studies (Taipei, Taiwan)
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