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rice abiotic stress

M Aydın Akbudak, Ertugrul Filiz, Kubra Kontbay
Biotic and abiotic stresses negatively affect fitness, biomass production, and crop yield in plants. The dehydration-responsive element-binding proteins ( DREB ) are important transcription factors (TFs), and are induced by abiotic and biotic stresses. In this study, genome-wide identification, in silico sequence, and phylogenetic analyses and expression analyses of DREB2 genes under cadmium (Cd) and salt (NaCl) stresses in sorghum ( Sorghum bicolor , Sb ) were performed. Six putative SbDREB2 genes were identified in sorghum genome and all contained AP2 domain (PF00847)...
October 2018: 3 Biotech
Ning Xu, Yanli Chu, Hongli Chen, Xingxing Li, Qi Wu, Liang Jin, Guixue Wang, Junli Huang
Plant roots are constantly exposed to a variety of abiotic stresses, and high salinity is one of the major limiting conditions that impose constraints on plant growth. In this study, we describe that OsMADS25 is required for the root growth as well as salinity tolerance, via maintaining ROS homeostasis in rice (Oryza sativa). Overexpression of OsMADS25 remarkably enhanced the primary root (PR) length and lateral root (LR) density, whereas RNAi silence of this gene reduced PR elongation significantly, with altered ROS accumulation in the root tip...
October 10, 2018: PLoS Genetics
Xin Wang, Huan Zhang, Lu-Yuan Shao, Xin Yan, Hui Peng, Jie-Xiu Ouyang, Shao-Bo Li
Heat shock proteins (HSPs) play essential roles in both plant growth and abiotic stress tolerance. In rice, OsHSP40 was recently reported to regulate programmed cell death (PCD) of suspension cells under high temperature. However, the expression and functions of OsHSP40 under normal growth or other abiotic stress conditions is still unknown. We reported the expression and function of a rice OsHSP40 gene under salt stress. Homologous proteins of OsHSP40 were collected from the NCBI database and constructed the neighbor-joining (NJ) phylogenetic tree...
October 8, 2018: Genes & Genomics
M R Panuccio, S Chaabani, R Roula, A Muscolo
Salinity is an abiotic stress which seriously affects crop production over the world, particularly in arid and semi-arid regions, with harmful effects on germination, growth and yield. Maize (Zea mays L.), cultivated in a wide spectrum of soil and climatic conditions, is the third most important cereal crop after rice and wheat, moderately sensitive to salt stress. A saline level more than 250 mM NaCl damages maize plants, causing severe wilting. In this study, the effects of hydro-priming (distilled water) and bio-priming (Rosmarinus officinalis L...
September 29, 2018: Plant Physiology and Biochemistry: PPB
Yushi Ishibashi, Takashi Yuasa, Mari Iwaya-Inoue
Environmental stresses can reduce crop yield and quality considerably. Plants protect cell metabolism in response to abiotic stresses at all stages of their life cycle, including seed production. As the production of vigorous seeds is important to both yield and crop growth, we analyzed causes of yield loss and reduced grain quality in staple crops exposed to environmental stresses such as drought and temperature extremes, with a focus on the remobilization of nutrients and water status during seed filling...
2018: Advances in Experimental Medicine and Biology
Guanglong Chen, Yu Zou, Jihong Hu, Yi Ding
BACKGROUND: Pentatricopeptide-repeat proteins (PPRs) are characterized by tandem arrays of a degenerate 35-amino-acid (PPR motifs), which can bind RNA strands and participate in post-transcription. PPR proteins family is one of the largest families in land plants and play important roles in organelle RNA metabolism and plant development. However, the functions of PPR genes involved in biotic and abiotic stresses of rice (Oryza sativa L.) remain largely unknown. RESULTS: In the present study, a comprehensive genome-wide analysis of PPR genes was performed...
October 1, 2018: BMC Genomics
Celso Gaspar Litholdo, Guilherme Cordenonsi da Fonseca
Circular RNAs (circRNAs) are a novel class of noncoding RNAs that have been extensively explored in the past few years. The advent of new high-throughput sequencing technologies coupled with bioinformatics tools revealed the presence of these molecules in the transcriptome of a wide range of organisms. In animals, circRNAs can modulate gene expression and act as sponges of miRNAs to inhibit their activity. It has been demonstrated that they have the potential to be diagnostic biomarkers as their expression is closely associated to human diseases, such as Alzheimer and cancer...
2018: Advances in Experimental Medicine and Biology
Hanamareddy Biradar, Ratna Karan, Prasanta K Subudhi
The transgenic technology using a single gene has been widely used for crop improvement. But the transgenic pyramiding of multiple genes, a promising alternative especially for enhancing complexly inherited abiotic stress tolerance, has received little attention. Here, we developed and evaluated transgenic rice lines with a single Salt Responsive Protein 3-1 ( SaSRP3-1 ) gene as well as pyramids with two-genes SaSRP3-1 and Vacuolar H+ -ATPase subunit c1 ( SaVHAc1 ) derived from a halophyte grass Spartina alterniflora L...
2018: Frontiers in Plant Science
Dan Cheng, Mingpu Tan, Haijuan Yu, Liang Li, Dandan Zhu, Yahua Chen, Mingyi Jiang
BACKGROUND: Metal tolerance is often an integrative result of metal uptake and distribution, which are fine-tuned by a network of signaling cascades and metal transporters. Thus, with the goal of advancing the molecular understanding of such metal homeostatic mechanisms, comparative RNAseq-based transcriptome analysis was conducted to dissect differentially expressed genes (DEGs) in maize roots exposed to cadmium (Cd) stress. RESULTS: To unveil conserved Cd-responsive genes in cereal plants, the obtained 5166 maize DEGs were compared with 2567 Cd-regulated orthologs in rice roots, and this comparison generated 880 universal Cd-responsive orthologs groups composed of 1074 maize DEGs and 981 rice counterparts...
September 26, 2018: BMC Genomics
G Forlani, M Bertazzini, G Cagnano
In most plant species, a rapid increase in free proline content occurs following exposure to hyperosmotic stress conditions. However, inconsistent results were reported concerning the role of such an increase on the plant response to water shortage or excess salt. Therefore, the possibility that proline accumulation may help the cell to withstand stress conditions, or that it simply represents a stress marker, is still a matter of debate. A possible relationship between proline accumulation and salt tolerance was investigated in a set of 17 Italian rice varieties...
September 25, 2018: Plant Biology
Maria Kidwai, Yogeshwar Vikram Dhar, Neelam Gautam, Madhu Tiwari, Iffat Zareen Ahmad, Mehar Hasan Asif, Debasis Chakrabarty
ClassIII peroxidases are multigene family of plant-specific peroxidase enzyme. They are involved in various physiological and developmental processes like auxin catabolism, cell metabolism, various biotic, abiotic stresses and cell elongation. In the present study, we identified a class III peroxidase (OsPRX38) from rice which is upregulated several folds in both arsenate (AsV) and arsenite (AsIII) stresses. The overexpression of OsPRX38 in Arabidopsis thaliana significantly enhances Arsenic (As) tolerance by increasing SOD, PRX GST activity and exhibited low H2 O2, electrolyte leakage and malondialdehyde content...
January 15, 2019: Journal of Hazardous Materials
Guang Chen, Chao Wu, Lei He, Zhennan Qiu, Sen Zhang, Yu Zhang, Longbiao Guo, Dali Zeng, Jiang Hu, Deyong Ren, Qian Qian, Li Zhu
Improving a plant's level of tolerance to oxidative stress can frequently also enhance its tolerance to several other abiotic stresses. Here, a screen of a japonica type rice T-DNA insertion mutant library identified a highly oxidative stress-sensitive mutant. The line exhibited premature leaf senescence, starting at the three-leaf stage, and the symptoms were particularly severe from the five-leaf stage onwards. The leaves progressively lost chlorophyll, suffered protein degradation and were compromised with respect to their photosynthetic activity; their leaf mesophyll and bulliform cells became shrunken, and several senescence-associated genes ( SAG s), senescence-associated transcription factor genes ( SATF s) and autophagy-related genes ( ATG s) were progressively up-regulated...
September 20, 2018: International Journal of Molecular Sciences
Dengji Lou, Houping Wang, Diqiu Yu
BACKGROUND: The sucrose non-fermenting-1-related protein kinase 2 family (SnRK2s) unifies different abiotic stress signals in plants. To date, the functions of two rice SnRK2s, osmotic stress/ABA-activated protein kinase 1 (SAPK1) and SAPK2, have been unknown. We investigated their roles in response to salt stress by generating loss-of-function lines using the CRISPR/Cas9 system and by overexpressing these proteins in transgenic rice plants. RESULTS: Expression profiling revealed that SAPK1 and SAPK2 expression were strongly induced by drought, NaCl, and PEG treatment, but not by ABA...
September 20, 2018: BMC Plant Biology
Elide Formentin, Elisabetta Barizza, Piergiorgio Stevanato, Marco Falda, Federica Massa, Danuše Tarkowskà, Ondřej Novák, Fiorella Lo Schiavo
Clear evidence has highlighted a role for hormones in the plant stress response, including salt stress. Interplay and cross-talk among different hormonal pathways are of vital importance in abiotic stress tolerance. A genome-wide transcriptional analysis was performed on leaves and roots of three-day salt treated and untreated plants of two Italian rice varieties, Baldo and Vialone Nano, which differ in salt sensitivity. Genes correlated with hormonal pathways were identified and analyzed. The contents of abscisic acid, indoleacetic acid, cytokinins, and gibberellins were measured in roots, stems, and leaves of seedlings exposed for one and three days to salt stress...
September 15, 2018: Plants (Basel, Switzerland)
Yuntao Liang, Lijun Meng, Xiuyun Lin, Yanru Cui, Yunlong Pang, Jianlong Xu, Zhikang Li
Low temperature stress is one of the major abiotic stresses limiting the productivity of Geng (japonica) rice grown the temperate regions as well as in tropical high lands worldwide. To develop rice varieties with improved cold tolerance (CT) at the reproductive stage, 84 BC2 CT introgression lines (ILs) were developed from five populations through backcross breeding. These CT ILs plus 310 random ILs from the same BC populations were used for dissecting genetic networks underlying CT in rice by detecting QTLs and functional genetic units (FGUs) contributing to CT...
2018: PloS One
Tao Song, Qian Zhang, Haiqi Wang, Jianbo Han, Zhiqiang Xu, Shuning Yan, Zhengge Zhu
JmjC-domain-containing (JmjC) protein, an important kind of histone demethylase in plants, plays key roles in multiple growth and development processes and in adversity resistance. In this study, we found that OsJMJ703, a known histone demethylase, is expressed in various tissues. Furthermore, over-expression of OsJMJ703 influenced the type of rice panicle, and knock-down of the expression of OsJMJ703 showed an earlier flowering time in rice. In addition, OsJMJ703 is involved in abiotic stress. Transgenic rice of over-expressing OsJMJ703 is sensitive to drought stress, whereas knocking down OsJMJ703 enhances the tolerance to drought stress...
September 6, 2018: Plant Physiology and Biochemistry: PPB
Weihuai Pan, Jinqiu Shen, Zhongzhong Zheng, Xu Yan, Jianxin Shou, Wenxiang Wang, Lixi Jiang, Jianwei Pan
BACKGROUND: The calcineurin B-like protein (CBL) and CBL-interacting protein kinase (CIPK) signaling system plays a key regulatory role in plant stress signaling. The roles of plant-specific CIPKs, essential for CBL-CIPK functions, in the response to various abiotic stresses have been extensively studied so far. However, until now, the possible roles of the CIPKs in the plant response to heavy metal toxicities are largely unknown. RESULTS: In this study, we used bioinformatic and molecular strategies to isolate 12 HsCIPK genes in Tibetan Plateau annual wild barley (Hordeum spontaneum C...
September 12, 2018: Rice
Wan Mohd Aizat, Sarah Ibrahim, Reyhaneh Rahnamaie-Tajadod, Kok-Keong Loke, Hoe-Han Goh, Normah Mohd Noor
Background: Jasmonic acid (JA) and its derivative, methyl JA (MeJA) are hormonal cues released by plants that signal defense response to curb damages from biotic and abiotic stresses. To study such response, a tropical herbal plant, Persicaria minor , which possesses pungent smell and various bioactivities including antimicrobial and anticancer, was treated with MeJA. Such elicitation has been performed in hairy root cultures and plants such as Arabidopsis and rice, yet how MeJA influenced the proteome of an herbal species like P...
2018: PeerJ
Shakuntala E Pillai, Chandan Kumar, Hitendra K Patel, Ramesh V Sonti
BACKGROUND: Members of the WRKY gene family play important roles in regulating plant responses to abiotic and biotic stresses. Treatment with either one of the two different cell wall degrading enzymes (CWDEs), LipaseA and CellulaseA, induces immune responses and enhances the expression of OsWRKY42 in rice. However, the role of OsWRKY42 in CWDE induced immune responses is not known. RESULTS: Expression of the rice transcription factor OsWRKY42 is induced upon treatment of rice leaves with CWDEs, wounding and salt...
September 3, 2018: BMC Plant Biology
Juliana R Cunha, Fabrício E L Carvalho, Milton C Lima-Neto, Douglas Jardim-Messeder, João Victor A Cerqueira, Marcio O Martins, Adilton V Fontenele, Márcia Márgis-Pinheiro, Setsuko Komatsu, Joaquim A G Silveira
Chloroplast APX isoforms display controversial roles as H2 O2 scavengers and signaling players in response to abiotic stress and conclusive results are lacking. We tested the hypothesis that thylakoidal APX displays an important role for drought tolerance, especially by regulating abundance of essential protein species. For this, OsApx8 RNAi-silenced rice (apx8) and non-transformed plants (NT) were exposed to mild water deficit. The drought-sensitivity in apx8 plants was revealed by decreases in shoot growth, relative water content and photosynthesis, which was accompanied by increased membrane damage, all compared to NT plants...
August 29, 2018: Journal of Proteomics
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