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https://www.readbyqxmd.com/read/28730464/genome-wide-association-mapping-of-canopy-wilting-in-diverse-soybean-genotypes
#1
Avjinder S Kaler, Jeffery D Ray, William T Schapaugh, C Andy King, Larry C Purcell
Genome-wide association analysis identified 61 SNP markers for canopy wilting, which likely tagged 51 different loci. Based on the allelic effects of the significant SNPs, the slowest and fastest wilting genotypes were identified. Drought stress is a major global constraint for crop production, and slow canopy wilting is a promising trait for improving drought tolerance. The objective of this study was to identify genetic loci associated with canopy wilting and to confirm those loci with previously reported canopy wilting QTLs...
July 20, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28729874/systematic-analysis-of-hsf-family-genes-in-the-brassica-napus-genome-reveals-novel-responses-to-heat-drought-and-high-co2-stresses
#2
Xiaoyi Zhu, Chunqian Huang, Liang Zhang, Hongfang Liu, Jinhui Yu, Zhiyong Hu, Wei Hua
Drought and heat stress are major causes of lost plant crop yield. In the future, high levels of CO2, in combination of other abiotic stress factors, will become a novel source of stress. Little is known of the mechanisms involved in the acclimation responses of plants to this combination of abiotic stress factors, though it has been demonstrated that heat shock transcription factors (Hsfs) are involved in plant response to various abiotic stresses. In this study, we performed a genome-wide identification and a systematic analysis of genes in the Hsf gene family in Brassica napus...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28727761/genome-wide-identification-of-the-potato-wrky-transcription-factor-family
#3
Chao Zhang, Dongdong Wang, Chenghui Yang, Nana Kong, Zheng Shi, Peng Zhao, Yunyou Nan, Tengkun Nie, Ruoqiu Wang, Haoli Ma, Qin Chen
WRKY transcription factors play pivotal roles in regulation of stress responses. This study identified 79 WRKY genes in potato (Solanum tuberosum). Based on multiple sequence alignment and phylogenetic relationships, WRKY genes were classified into three major groups. The majority of WRKY genes belonged to Group II (52 StWRKYs), Group III had 14 and Group I consisted of 13. The phylogenetic tree further classified Group II into five sub-groups. All StWRKY genes except StWRKY79 were mapped on potato chromosomes, with eight tandem duplication gene pairs and seven segmental duplication gene pairs found from StWRKY family genes...
2017: PloS One
https://www.readbyqxmd.com/read/28727205/drivers-of-woody-canopy-water-content-responses-to-drought-in-a-mediterranean-type-ecosystem
#4
Tarin Paz-Kagan, Gregory P Asner
Severe droughts increase physiological stress in woody plant species, which can lead to mortality, fundamentally altering the composition, structure, and biogeography of forests in many regions. Little is known, however, about the factors determining the physiological response of woody plants to drought at landscape scales. Our objective was to understand woody plant species responses to ongoing changes in climate, using remotely sensed canopy water content (CWC) as an indicator of plant physiological and phenological status...
July 20, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28726732/characterization-of-the-dioscorin-gene-family-in-dioscorea-alata-reveals-a-role-in-tuber-development-and-environmental-response
#5
Linya Liu, Yacheng Huang, Xiaolong Huang, Jianghua Yang, Wenqiang Wu, Yun Xu, Ziwen Cong, Jun Xie, Wei Xia, Dongyi Huang
Dioscorin is one of the major soluble proteins in yam tubers. Unlike other well-known plant storage proteins, such as patatin and sporamin, dioscorin is argued for its function as storage proteins, and the molecular mechanisms underlying its expressional complexity are little understood. In this study, we isolated five dioscorin genes from Dioscorea alata L., comprising three class A (Da-dio1, -3 and -4) and two class B (Da-dio2 and -5) isoforms. Expressions of all dioscorin genes gradually decreased in mother tubers during yam sprouting and regrowth...
July 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28724592/vascular-development-in-very-young-conifer-seedlings-theoretical-hydraulic-capacities-and-potential-resistance-to-embolism
#6
Megan L Miller, Daniel M Johnson
PREMISE OF THE STUDY: Conifers have the highest rates of mortality during their first year, often attributed to water stress; yet, this tree life stage is the least studied in terms of hydraulic properties. Previous work has revealed correlations between xylem anatomy to both hydraulic transport capacity and resistance to hydraulic dysfunction. In this study, we compared xylem anatomical and plant functional traits of Pseudotsuga menziesii, Larix occidentalis, and Pinus ponderosa seedlings over the first 10 wk of growth to evaluate potential maximum hydraulic capabilities and resistance to drought-induced embolism...
July 19, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28724076/gbs-based-genomic-selection-for-pea-grain-yield-under-severe-terminal-drought
#7
Paolo Annicchiarico, Nelson Nazzicari, Luciano Pecetti, Massimo Romani, Barbara Ferrari, Yanling Wei, E Charles Brummer
Terminal drought is the main stress that limits pea ( L.) grain yield in Mediterranean-climate regions. This study provides an unprecedented assessment of the predictive ability of genomic selection (GS) for grain yield under severe terminal drought using genotyping-by-sequencing (GBS) data. Additional aims were to assess the GS predictive ability for different GBS data quality filters and GS models, comparing intrapopulation with interpopulation GS predictive ability and to perform genome-wide association (GWAS) studies...
July 2017: Plant Genome
https://www.readbyqxmd.com/read/28723926/ghsos1-a-plasma-membrane-na-h-antiporter-gene-from-upland-cotton-enhances-salt-tolerance-in-transgenic-arabidopsis-thaliana
#8
Xiugui Chen, Xuke Lu, Na Shu, Delong Wang, Shuai Wang, Junjuan Wang, Lixue Guo, Xiaoning Guo, Weili Fan, Zhongxu Lin, Wuwei Ye
Upland cotton (Gossypium hirsutum L.), an important source of natural fiber, can tolerate relatively high salinity and drought stresses. In the present study, a plasma membrane Na+/H+ antiporter gene, GhSOS1, was cloned from a salt-tolerant genotype of G. hirsutum, Zhong 9807. The expression level of GhSOS1 in cotton roots was significantly upregulated in the presence of high concentrations of NaCl (200 mM), while its transcript abundance was increased when exposed to low temperature and drought stresses. Localization analysis using onion epidermal cells showed that the GhSOS1 protein was localized to the plasma membrane...
2017: PloS One
https://www.readbyqxmd.com/read/28720730/drought-stress-results-in-a-compartment-specific-restructuring-of-the-rice-root-associated-microbiomes
#9
Christian Santos-Medellín, Joseph Edwards, Zachary Liechty, Bao Nguyen, Venkatesan Sundaresan
Plant roots support complex microbial communities that can influence plant growth, nutrition, and health. While extensive characterizations of the composition and spatial compartmentalization of these communities have been performed in different plant species, there is relatively little known about the impact of abiotic stresses on the root microbiota. Here, we have used rice as a model to explore the responses of root microbiomes to drought stress. Using four distinct genotypes, grown in soils from three different fields, we tracked the drought-induced changes in microbial composition in the rhizosphere (the soil immediately surrounding the root), the endosphere (the root interior), and unplanted soils...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28719623/moderate-irrigation-intervals-facilitate-establishment-of-two-desert-shrubs-in-the-taklimakan-desert-highway-shelterbelt-in-china
#10
Congjuan Li, Xiang Shi, Osama Abdalla Mohamad, Jie Gao, Xinwen Xu, Yijun Xie
BACKGROUND: Water influences various physiological and ecological processes of plants in different ecosystems, especially in desert ecosystems. The purpose of this study is to investigate the response of physiological and morphological acclimation of two shrubs Haloxylon ammodendron and Calligonum mongolicunl to variations in irrigation intervals. METHODOLOGY/PRINCIPAL FINDINGS: The irrigation frequency was set as 1-, 2-, 4-, 8- and 12-week intervals respectively from March to October during 2012-2014 to investigate the response of physiological and morphological acclimation of two desert shrubs Haloxylon ammodendron and Calligonum mongolicunl to variations in the irrigation system...
2017: PloS One
https://www.readbyqxmd.com/read/28716423/nadk2-positively-modulates-abscisic-acid-induced-stomatal-closure-by-affecting-accumulation-of-h2o2-ca-2-and-nitric-oxide-in-arabidopsis-guard-cells
#11
Lirong Sun, Yaping Li, Wenwen Miao, Tingting Piao, Yang Hao, Fu-Shun Hao
NAD kinase2 (NADK2) plays key roles in chloroplastic NADP biosynthesis, stress adaptation and modulation of cellular metabolisms in Arabidopsis. However, it is unknown whether and how NADK2 affects abscisic acid (ABA)-mediated stomatal movement. Here, we detected that null mutant nadk2 was more sensitive to drought stress than WT, and NADK2 gene was active in guard cells. Furthermore, NADK2 mutation impaired ABA-induced stomatal closure and ABA inhibition of light-promoted stomatal opening. NADK2 disruption also impaired ABA-stimulated accumulation of H2O2, Ca(2+) and nitric oxide (NO) in guard cells, but did not affect the stomatal closure evoked by exogenous H2O2, Ca(2+) or NO...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28716421/dual-functioning-of-plant-arginases-provides-a-third-route-for-putrescine-synthesis
#12
Jigar Patel, Menaka Ariyaratne, Sheaza Ahmed, Lingxiao Ge, Vipaporn Phuntumart, Andrea Kalinoski, Paul F Morris
Two biosynthetic routes are known for putrescine, an essential plant metabolite. Ornithine decarboxylase (ODC) converts ornithine directly to putrescine, while a second route for putrescine biosynthesis utilizes arginine decarboxylase (ADC) to convert arginine to agmatine, and two additional enzymes, agmatine iminohydrolase (AIH) and N-carbamoyl putrescine aminohydrolase (NLP1) to complete this pathway. Here we show that plants can use ADC and arginase/agmatinase (ARGAH) as a third route for putrescine synthesis...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28716417/alcohol-dehydrogenase-1-adh1-confers-both-abiotic-and-biotic-stress-resistance-in-arabidopsis
#13
Haitao Shi, Wen Liu, Yue Yao, Yunxie Wei, Zhulong Chan
Although the transcriptional regulation and upstream transcription factors of AtADH1 in response to abiotic stress are widely revealed, the in vivo roles of AtADH1 remain unknown. In this study, we found that the expression of AtADH1 was largely induced after salt, drought, cold and pathogen infection. Further studies found that AtADH1 overexpressing plants were more sensitive to abscisic acid (ABA) in comparison to wide type (WT), while AtADH1 knockout mutants showed no significant difference compared with WT in ABA sensitivity...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28713405/vegetable-grafting-as-a-tool-to-improve-drought-resistance-and-water-use-efficiency
#14
REVIEW
Pradeep Kumar, Youssef Rouphael, Mariateresa Cardarelli, Giuseppe Colla
Drought is one of the most prevalent limiting factors causing considerable losses in crop productivity, inflicting economic as well as nutritional insecurity. One of the greatest challenges faced by the scientific community in the next few years is to minimize the yield losses caused by drought. Drought resistance is a complex quantitative trait controlled by many genes. Thus, introgression of drought resistance traits into high yielding genotypes has been a challenge to plant breeders. Vegetable grafting using rootstocks has emerged as a rapid tool in tailoring plants to better adapt to suboptimal growing conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28713401/genome-wide-association-study-reveals-natural-variations-contributing-to-drought-resistance-in-crops
#15
REVIEW
Hongwei Wang, Feng Qin
Crops are often cultivated in regions where they will face environmental adversities; resulting in substantial yield loss which can ultimately lead to food and societal problems. Thus, significant efforts have been made to breed stress tolerant cultivars in an attempt to minimize these problems and to produce more stability with respect to crop yields across broad geographies. Since stress tolerance is a complex and multi-genic trait, advancements with classical breeding approaches have been challenging. On the other hand, molecular breeding, which is based on transgenics, marker-assisted selection and genome editing technologies; holds great promise to enable farmers to better cope with these challenges...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28713394/a-novel-nac-transcription-factor-pbenac1-of-pyrus-betulifolia-confers-cold-and-drought-tolerance-via-interacting-with-pbedrebs-and-activating-the-expression-of-stress-responsive-genes
#16
Cong Jin, Kong-Qing Li, Xiao-Yong Xu, Hu-Ping Zhang, Hui-Xian Chen, Yu-Hong Chen, Jing Hao, Yang Wang, Xiao-San Huang, Shao-Ling Zhang
NAC (NAM, ATAF, and CUC) transcription factors are important regulator in abiotic stress and plant development. However, knowledge concerning the functions of plant NAC TFs functioning in stress tolerance and the underlying molecular basis are still limited. In this study, we report functional characterization of the NAC TF, PbeNAC1, isolated from Pyrus betulifolia. PbeNAC1 were greatly induced by cold and drought, while salt stress had little effect on expression. PbeNAC1 was localized in the nuclei showed transactivation activity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28713194/drought-priming-improves-subsequent-more-severe-drought-in-a-drought-sensitive-cultivar-of-olive-cv-ch%C3%A3-toui
#17
Mariem Ben Abdallah, Kawther Methenni, Issam Nouairi, Mokhtar Zarrouk, Nabil Ben Youssef
Drought is a major factor limiting crop production worldwide. The objective of this study was to test whether pre-exposure to drought can enhance the subsequent drought response of a drought-sensitive variety of olive cv. Chétoui. Seven-months old olive plants were grown in a controlled conditions and divided into control plants (irrigated daily), primed plants (PP, primed by exposure to drought for 21 days, re-watered for 60 days and then exposed to water depletion for 30 days) and non-primed plants (NPP, well watered for 81 days and immediately followed by intermediate drought as PP)...
July 14, 2017: Scientia Horticulturae
https://www.readbyqxmd.com/read/28712388/ring-e3-ligases-key-regulatory-elements-are-involved-in-abiotic-stress-responses-in-plants
#18
Seok Keun Cho, Moon Young Ryu, Jong Hum Kim, Jeong Soo Hong, Tae Rin Oh, Woo Taek Kim, Seong Wook Yang
Plants are constantly exposed to a variety of abiotic stresses, such as drought, heat, cold, flood, and salinity. To survive under such unfavorable conditions, plants have evolutionarily developed their own resistant-mechanisms. For several decades, many studies have clarified specific stress response pathways of plants through various molecular and genetic studies. In particular, it was recently discovered that ubiquitin proteasome system (UPS), a regulatory mechanism for protein turn over, is greatly involved in the stress responsive pathways...
July 17, 2017: BMB Reports
https://www.readbyqxmd.com/read/28711792/regulation-of-proline-biosynthesis-and-resistance-to-drought-stress-in-two-barley-hordeum-vulgare-l-genotypes-of-different-origin
#19
Hanna Bandurska, Justyna Niedziela, Małgorzata Pietrowska-Borek, Katarzyna Nuc, Tamara Chadzinikolau, Dominika Radzikowska
Drought is considered the main abiotic stress factor that inhibits growth of crop plants (including barley), limiting yield in many regions worldwide. Predicted climate changes show that in future the frequency and intensity of drought events will rise, so crops that are resistant to this stress are in demand. One of the adaptive metabolic responses to drought is the accumulation of proline. The aim of this study was to examine the effect of 10-day drought on tissue dehydration and proline biosynthesis in leaves as well as in roots of barley genotypes of different origin: the Syrian breeding line Cam/B1/CI and the German cultivar Maresi...
July 8, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28711789/towards-a-better-understanding-of-protein-changes-in-common-bean-under-drought-a-case-study-of-n-glycoproteins
#20
Tanja Zadražnik, Anders Moen, Wolfgang Egge-Jacobsen, Vladimir Meglič, Jelka Šuštar-Vozlič
Drought is one of the major abiotic stress conditions limiting crop growth and productivity. Glycosylation of proteins is very important post-translational modification that is involved in many physiological functions and biological pathways. To understand the involvement of N-glycoproteins in the mechanism of drought response in leaves of common bean, a proteomic approach using lectin affinity chromatography, SDS-PAGE and LC-MS/MS was applied. Quantification of N-glycoproteins was performed using MaxQuant with a label free quantification approach...
July 5, 2017: Plant Physiology and Biochemistry: PPB
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