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https://read.qxmd.com/read/30877394/modified-version-for-spei-to-evaluate-and-modeling-the-agricultural-drought-severity
#1
Abdol Rassoul Zarei, Mohammad Mehdi Moghimi
Drought is a climatic phenomenon that can occur in various regions with different climate conditions. Generally, drought has negative impacts on different fields such as environment, rangelands, and water resources. The agricultural section (especially rain-fed agriculture) is one of the parts that is directly affected by different types of drought especially meteorological and agricultural droughts. The standardized precipitation evapotranspiration index (SPEI) is one of the newest and most applied indices to assess drought characteristics...
March 15, 2019: International Journal of Biometeorology
https://read.qxmd.com/read/30875531/physiological-and-biochemical-responses-of-two-spring-wheat-genotypes-to-non-hydraulic-root-to-shoot-signalling-of-partial-and-full-root-zone-drought-stress
#2
Asfa Batool, Nudrat Aisha Akram, Zheng-Guo Cheng, Guang-Chao Lv, Muhammad Ashraf, Muhammad Afzal, Jun-Lan Xiong, Jian-Yong Wang, You-Cai Xiong
Non-hydraulic root-sourced signal (nHRS) is so far affirmed to be a unique positive early-warning response to drying soil, however its physiological and agronomic implications are still unclear. We designed two contrast methods to induce nHRS in two wheat (Triticum aestivum L.) genotypes released in different decades under pot-culture conditions. Partial root-zone stress (PS) was performed using the method of split-root alternative water supply (one half wetting and the other drying) to induce the continuous operation of nHRS, and full root-zone stress (FS) was subjected to whole root system to periodic operation of nHRS...
March 7, 2019: Plant Physiology and Biochemistry: PPB
https://read.qxmd.com/read/30873195/identification-and-functional-characterization-of-squamosa-promoter-binding-protein-like-gene-taspl16-in-wheat-triticum-aestivum-l
#3
Rufei Cao, Lijian Guo, Meng Ma, Wenjing Zhang, Xiangli Liu, Huixian Zhao
Wheat ( Triticum aestivum L.) is one of the most important crops in the world. Squamosa promoter binding protein-like (SPL) proteins are plant-specific transcript factors and play critical roles in plant growth and development. The functions of many SPL gene family members were well characterized in Arabidopsis and rice, in contrast, research on wheat SPL genes is lagging behind. In this study, we cloned and characterized TaSPL16 , an orthologous gene of rice OsSPL16 , in wheat. Three TaSPL16 homoeologs are located on the short arms of chromosome 7A, 7B, and 7D, and share more than 96% sequence identity with each other...
2019: Frontiers in Plant Science
https://read.qxmd.com/read/30872651/effects-of-tillage-and-straw-return-on-water-stable-aggregates-carbon-stabilization-and-crop-yield-in-an-estuarine-alluvial-soil
#4
Ke Song, Xianqing Zheng, Weiguang Lv, Qin Qin, Lijuan Sun, Hanlin Zhang, Yong Xue
In China, the average soil organic carbon (SOC) content of cultivated land is 30% less than the world average. Therefore, cultivation management-induced changes in SOC dynamics are necessary, especially in estuarine alluvial islands, where the SOC stocks are limited. We studied the effect of different combinations of tillage, fertilization and straw return on C distribution in different soil aggregates and on crop yield on an estuarine alluvial soil in eastern China. Compared to conventional tillage, conservation tillage (no-tillage coupled with straw return) increased water-stable large macroaggregates (>2 mm) by 35...
March 14, 2019: Scientific Reports
https://read.qxmd.com/read/30872321/identification-of-molecular-integrators-shows-that-nitrogen-actively-controls-the-phosphate-starvation-response-in-plants
#5
Anna Medici, Wojciech Szponarski, Pierre Dangeville, Alaeddine Safi, Indeewari Madhubhashini Dissanayake, Chorpet Saenchai, Amélie Emanuel, Vicente Rubio, Benoît Lacombe, Sandrine Ruffel, Milos Tanurdzic, Hatem Rouached, Gabriel Krouk
Nitrogen (N) and phosphorus (P) are key macronutrients sustaining plant growth and crop yield, and ensuring food security worldwide. Understanding how plants perceive and interpret the combinatorial nature of these signals thus has important agricultural implications within the context of: i) increased food demand, ii) limited P supply, and iii) environmental pollution due to N fertilizer usage. Here we report the discovery of an active control of P Starvation Responses (PSR) by a combination of local and long-distance N signaling pathways in plants...
March 14, 2019: Plant Cell
https://read.qxmd.com/read/30868647/%C3%AE-ct-trait-analysis-reveals-morphometric-differences-between-domesticated-temperate-small-grain-cereals-and-their-wild-relatives
#6
Nathan Hughes, Hugo R Oliveira, Nick Fradgley, Fiona Corke, James Cockram, John H Doonan, Candida Nibau
Wheat and barley are two of the founder crops domesticated in the Fertile Crescent, and currently represent crops of major economic importance in temperate regions. Due to impacts on yield, quality and end-use, grain morphometric traits remain an important goal for modern breeding programmes and are believed to have been selected for by human populations. To directly and accurately assess the 3D characteristics of grains, we combine X-ray micro computed tomography (μCT) imaging techniques with bespoke image analysis tools and mathematical modelling to investigate how grain size and shape varies across wild and domesticated wheat and barley...
March 14, 2019: Plant Journal: for Cell and Molecular Biology
https://read.qxmd.com/read/30868385/functional-characterization-of-hsfs-from-wheat-in-response-to-heat-and-other-abiotic-stress-conditions
#7
Preeti Agarwal, Paramjit Khurana
High temperature stress is known to be one of the major limiting factors for wheat productivity worldwide. HSFs are known to play a central role in heat stress response in plants. Hence, the current study is an attempt to explore an in-depth involvement of TaHSFs in stress responses mainly in heat and other abiotic responses like salinity, drought, and cold stress. Effort was made to understand as how the expression of HSF is able to define the differential robustness of wheat varieties. Subsequent studies were done to establish the involvement of any temporal or spatial cue on the behavior of these TaHSFs under heat stress conditions...
March 13, 2019: Functional & Integrative Genomics
https://read.qxmd.com/read/30863676/transcriptome-analysis-of-osmotic-responsive-genes-in-aba-dependent-and-independent-pathways-in-wheat-triticum-aestivum-l-roots
#8
Chunxi Li, Wenli Zhang, Meng Yuan, Lina Jiang, Bo Sun, Daijing Zhang, Yun Shao, Anqi Liu, Xueqing Liu, Jianhui Ma
Bread wheat is one of the most important crops in the world. However, osmotic stress significantly inhibits wheat growth and development, and reduces crop yield and quality. Plants respond to osmotic stress mainly through abscisic acid (ABA)-dependent and -independent pathways. In this study, root transcriptome profiles of wheat seedlings exposed to osmotic stress and exogenous ABA were analysed to identify osmotic-responsive genes belonging to the ABA-dependent or -independent pathways. We found that osmotic stress promoted proline biosynthesis in the ABA-dependent pathway, and trehalose biosynthesis is likely promoted among soluble sugars to maintain protein bioactivity under osmotic stress...
2019: PeerJ
https://read.qxmd.com/read/30863417/dissection-of-pleiotropic-qtl-regions-controlling-wheat-spike-characteristics-under-different-nitrogen-treatments-using-traditional-and-conditional-qtl-mapping
#9
Xiaoli Fan, Fa Cui, Jun Ji, Wei Zhang, Xueqiang Zhao, JiaJia Liu, Deyuan Meng, Yiping Tong, Tao Wang, Junming Li
Optimal spike characteristics are critical in improving the sink capacity and yield potential of wheat even in harsh environments. However, the genetic basis of their response to nitrogen deficiency is still unclear. In this study, quantitative trait loci (QTL) for six spike-related traits, including heading date (HD), spike length (SL), spikelet number (SN), spike compactness (SC), fertile spikelet number (FSN), and sterile spikelet number (SSN), were detected under two different nitrogen (N) supplies, based on a high-density genetic linkage map constructed by PCR markers, DArTs, and Affymetrix Wheat 660 K SNP chips...
2019: Frontiers in Plant Science
https://read.qxmd.com/read/30863378/a-major-facilitator-superfamily-peptide-transporter-from-fusarium-oxysporum-influences-bioethanol-production-from-lignocellulosic-material
#10
Brian Nugent, Shahin S Ali, Ewen Mullins, Fiona M Doohan
Fusarium oxysporum is a leading microbial agent in the emerging consolidated bioprocessing (CBP) industry owing to its capability to infiltrate the plant's lignin barrier and degrade complex carbohydrates to value-added chemicals such as bioethanol in a single step. Membrane transport of nutrients is a key factor in successful microbial colonization of host tissue. This study assessed the impact of a peptide transporter on F. oxysporum's ability to convert lignocellulosic straw to ethanol. We characterized a novel F...
2019: Frontiers in Microbiology
https://read.qxmd.com/read/30862563/analysis-of-durum-wheat-proteome-changes-under-marine-and-fungal-biostimulant-treatments-using-large-scale-quantitative-proteomics-a-useful-dataset-of-durum-wheat-proteins
#11
Carole Pichereaux, Eve-Anne Laurent, Audrey Gargaros, Sébastien Viudes, Céline Durieu, Thierry Lamaze, Philippe Grieu, Odile Burlet-Schiltz
Durum wheat requires high nitrogen inputs to obtain the high protein concentration necessary to satisfy pasta and semolina quality criteria. Optimizing plant nitrogen use efficiency is therefore of major importance for wheat grain quality. Here, we studied the impact on grain yield, protein concentration, and for the first time on protein composition of a marine (DPI4913) and a fungal (AF086) biostimulants applied to plant leaves. A large-scale quantitative proteomics analysis of wheat flour samples led to a dataset of 1471 identified proteins...
March 9, 2019: Journal of Proteomics
https://read.qxmd.com/read/30862122/effect-of-dietary-carbohydrate-to-protein-ratio-on-gut-microbiota-in-atlantic-salmon-salmo-salar
#12
Alejandro Villasante, Carolina Ramírez, Natalia Catalán, Rafael Opazo, Patricio Dantagnan, Jaime Romero
Atlantic salmon ( Salmo salar ) is a carnivorous fish species whose productive performance tends to be suboptimal when fed low-cost carbohydrate rich meals. It is of interest to study the dynamics of gut microbiota communities in salmonids fed high carbohydrate diets since gut microbes are referred to as key players that influence the metabolism and physiology of the host. A study was conducted to determine the effect of feeding a high carbohydrate diet to Atlantic salmon in gut microbiota communities. A medium carbohydrate (15% wheat starch)/medium protein (MC/MP) diet or a high carbohydrate (30% wheat starch)/low protein (HC/LP) diet was fed to triplicate tanks (28 fish each) during four weeks...
March 11, 2019: Animals: An Open Access Journal From MDPI
https://read.qxmd.com/read/30856274/transgenic-solutions-to-increase-yield-and-stability-in-wheat-shining-hope-or-flash-in-the-pan
#13
José L Araus, Maria D Serret, Marta S Lopes
No abstract text is available yet for this article.
March 11, 2019: Journal of Experimental Botany
https://read.qxmd.com/read/30856235/comparative-metabolomic-profiling-in-the-roots-and-leaves-in-contrasting-genotypes-reveals-complex-mechanisms-involved-in-post-anthesis-drought-tolerance-in-wheat
#14
Zhiyu Kang, Md Ali Babar, Naeem Khan, Jia Guo, Jahangir Khan, Shafiqul Islam, Sumit Shrestha, Dipendra Shahi
Understanding the contrasting biochemical changes in different plant parts in response to drought can help to formulate smart strategies to develop drought tolerant genotypes. The current study used metabolomics and physiological approaches to understand the differential biochemical changes coupled with physiological adjustments in leaves and roots to cope with drought stress in two wheat genotypes, LA754 (drought tolerant) and AGS2038 (drought sensitive). The gas chromatography-mass spectrometry (GC-MS) analysis and physiological trait estimation were performed in the roots and leaves after drought imposition...
2019: PloS One
https://read.qxmd.com/read/30853966/determining-the-optimal-n-input-to-improve-grain-yield-and-quality-in-winter-wheat-with-reduced-apparent-n-loss-in-the-north-china-plain
#15
Geng Ma, Weixing Liu, Shasha Li, Panpan Zhang, Chenyang Wang, Hongfang Lu, Lifang Wang, Yingxin Xie, Dongyun Ma, Guozhang Kang
Excessive or improper nitrogen (N) application rates negatively affect crop production and thereby environmental quality, particularly for winter wheat production in the North China Plain. Therefore, it is very important to optimize N fertilizer input to balance grain yield, environmental risk, and benefits under irrigated conditions. Three long-term stationary field experiments including five N levels, from 0 to 300 kg ha-1 [0 (N0), 90 (N90), 180 (N180), 240 (N240), and 300 (N300) kg ha-1 ] were carried out to investigate the effects of N regime on wheat yield, photosynthesis, and N balance at different sites...
2019: Frontiers in Plant Science
https://read.qxmd.com/read/30846873/developmental-and-physiological-responses-of-brachypodium-distachyon-to-fluctuating-nitrogen-availability
#16
L C David, T Girin, E Fleurisson, E Phommabouth, A Mahfoudhi, S Citerne, P Berquin, F Daniel-Vedele, A Krapp, S Ferrario-Méry
The Nitrogen Use Efficiency (NUE) of grain cereals depends on nitrate (NO3 - ) uptake from the soil, translocation to the aerial parts, nitrogen (N) assimilation and remobilization to the grains. Brachypodium distachyon has been proposed as a model species to identify the molecular players and mechanisms that affects these processes, for the improvement of temperate C3 cereals. We report on the developmental, physiological and grain-characteristic responses of the Bd21-3 accession of Brachypodium to variations in NO3 - availability...
March 7, 2019: Scientific Reports
https://read.qxmd.com/read/30845909/structural-organization-and-functional-divergence-of-high-isoelectric-point-%C3%AE-amylase-genes-in-bread-wheat-triticum-aestivum-l-and-barley-hordeum-vulgare-l
#17
Liangliang Ju, Guangbing Deng, Junjun Liang, Haili Zhang, Qiao Li, Zhifen Pan, Maoqun Yu, Hai Long
BACKGROUND: High isoelectric point α-amylase genes (Amy1) play major roles during cereal seed germination, and are associated with unacceptable high residual α-amylase activities in ripe wheat grains. However, in wheat and barley, due to extremely high homology of duplicated copies, and large and complex genome background, the knowledge on this multigene family is limited. RESULTS: In the present work, we identified a total of 41 Amy1 genes among 13 investigated grasses...
March 7, 2019: BMC Genetics
https://read.qxmd.com/read/30843087/the-stimulatory-effects-of-plant-growth-promoting-rhizobacteria-and-plant-growth-regulators-on-wheat-physiology-grown-in-sandy-soil
#18
Naeem Khan, Asghari Bano, M D Ali Babar
The present study was aimed to investigate the effects of plant growth promoting rhizobacteria (PGPR) and plant growth regulators (PGRs) on the physiology and yield of wheat grown in less fertile sandy soil. The isolated PGPR strains were identified by 16S-rRNA gene sequencing as Planomicrobium chinense (P1), Bacillus cereus (P2) and Pseudomonas fluorescens (P3). Wheat varieties (Galaxy-13 and Pak-2013) differing in sensitivity to drought were soaked in fresh cultures of bacterial isolates and the PGRs (salicylic acid and putrescine) were sprayed at 150 mg/L on seedlings at three leaf stage...
March 6, 2019: Archives of Microbiology
https://read.qxmd.com/read/30841552/using-a-portable-active-sensor-to-monitor-growth-parameters-and-predict-grain-yield-of-winter-wheat
#19
Jiayi Zhang, Xia Liu, Yan Liang, Qiang Cao, Yongchao Tian, Yan Zhu, Weixing Cao, Xiaojun Liu
Rapid and effective acquisition of crop growth information is a crucial step of precision agriculture for making in-season management decisions. Active canopy sensor GreenSeeker (Trimble Navigation Limited, Sunnyvale, CA, USA) is a portable device commonly used for non-destructively obtaining crop growth information. This study intended to expand the applicability of GreenSeeker in monitoring growth status and predicting grain yield of winter wheat ( Triticum aestivum L.). Four field experiments with multiple wheat cultivars and N treatments were conducted during 2013⁻2015 for obtaining canopy normalized difference vegetation index (NDVI) and ratio vegetation index (RVI) synchronized with four agronomic parameters: leaf area index (LAI), leaf dry matter (LDM), leaf nitrogen concentration (LNC), and leaf nitrogen accumulation (LNA)...
March 5, 2019: Sensors
https://read.qxmd.com/read/30840631/combining-biophysical-parameters-spectral-indices-and-multivariate-hyperspectral-models-for-estimating-yield-and-water-productivity-of-spring-wheat-across-different-agronomic-practices
#20
Salah El-Hendawy, Nasser Al-Suhaibani, Salah Elsayed, Yahya Refay, Majed Alotaibi, Yaser Hassan Dewir, Wael Hassan, Urs Schmidhalter
Manipulating plant densities under different irrigation rates can have a significant impact on grain yield and water use efficiency by exerting positive or negative effects on ET. Whereas traditional spectral reflectance indices (SRIs) have been used to assess biophysical parameters and yield, the potential of multivariate models has little been investigated to estimate these parameters under multiple agronomic practices. Therefore, both simple indices and multivariate models (partial least square regression (PLSR) and support vector machines (SVR)) obtained from hyperspectral reflectance data were compared for their applicability for assessing the biophysical parameters in a field experiment involving different combinations of three irrigation rates (1...
2019: PloS One
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