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https://www.readbyqxmd.com/read/29681133/ghwip2-a-wip-zinc-finger-protein-suppresses-cell-expansion-in-gerbera-hybrida-by-mediating-crosstalk-between-gibberellin-abscisic-acid-and-auxin
#1
Guiping Ren, Lingfei Li, Yuhua Huang, Yaqin Wang, Wenbin Zhang, Rouyan Zheng, Chunmei Zhong, Xiaojing Wang
Cell expansion is a key determinant for the final size and shape of plant organ, and is regulated by various phytohormones. Zinc finger proteins (ZFPs) consist of a superfamily involved in multiple aspects of organ morphogenesis. However, little is known about WIP-type ZFP function in phytohormone-mediated organ growth. Using reverse genetics, RNA-seq and phytohormone quantification, we elucidated the role of a new WIP-type ZFP from Gerbera hybrida, GhWIP2, in controlling organ growth via regulation of cell expansion...
April 22, 2018: New Phytologist
https://www.readbyqxmd.com/read/29680877/role-of-arabidopsis-abf1-3-4-during-det1-germination-in-salt-and-osmotic-stress-conditions
#2
V C Dilukshi Fernando, Wesam Al Khateeb, Mark F Belmonte, Dana F Schroeder
Arabidopsis det1 mutants exhibit salt and osmotic stress resistant germination. This phenotype requires HY5, ABF1, ABF3, and ABF4. While DE-ETIOLATED 1 (DET1) is well known as a negative regulator of light development, here we describe how det1 mutants also exhibit altered responses to salt and osmotic stress, specifically salt and mannitol resistant germination. LONG HYPOCOTYL 5 (HY5) positively regulates both light and abscisic acid (ABA) signalling. We found that hy5 suppressed the det1 salt and mannitol resistant germination phenotype, thus, det1 stress resistant germination requires HY5...
April 21, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29677681/pphb22-a-member-of-hd-zip-proteins-activates-ppdam1-to-regulate-bud-dormancy-transition-in-suli-pear-pyrus-pyrifolia-white-pear-group
#3
Qinsong Yang, Qingfeng Niu, Jianzhao Li, Xiaoyan Zheng, Yunjing Ma, Songling Bai, Yuanwen Teng
Homeodomain-leucine zipper (HD-Zip) proteins, which form one of the largest and most diverse families, regulate many biological processes in plants, including differentiation, flowering, vascular development, and stress signaling. Abscisic acid (ABA) has been proved to be one of the key regulators of bud dormancy and to influence several HD-Zip genes expression. However, the role of HD-Zip genes in regulating bud dormancy remains unclear. We identified 47 pear (P. pyrifolia White Pear Group) HD-Zip genes, which were classified into four subfamilies (HD-Zip I-IV)...
April 5, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29677595/bioherbicides-current-knowledge-on-weed-control-mechanism
#4
REVIEW
Ramalingam Radhakrishnan, Abdulaziz A Alqarawi, Elsayed Fathi Abd Allah
Weed control is a challenging event during crop cultivation. Integrated management, including the application of bioherbicides, is an emerging method for weed control in sustainable agriculture. Plant extracts, allelochemicals and some microbes are utilized as bioherbicides to control weed populations. Bioherbicides based on plants and microbes inhibit the germination and growth of weeds; however,few studies conducted in weed physiology. This review ascribes the current knowledge of the physiological changes in weeds that occur during the exposure to bioherbicides...
April 17, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29670640/the-maize-aba-receptors-zmpyl8-9-and-12-facilitate-plant-drought-resistance
#5
Zhenghua He, Junwei Zhong, Xiaopeng Sun, Bingcai Wang, William Terzaghi, Mingqiu Dai
Drought is one of the major abiotic stresses affecting world agriculture. Breeding drought-resistant crops is one of the most important challenges for plant biologists. PYR1/PYL/RCARs , which encode the abscisic acid (ABA) receptors, play pivotal roles in ABA signaling, but how these genes function in crop drought response remains largely unknown. Here we identified 13 PYL family members in maize ( ZmPYL1-13 ). Changes in expression of these genes under different stresses indicated that ZmPYLs played important roles in responding to multiple abiotic stresses...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29670014/transient-overexpression-of-hvserk2-improves-barley-resistance-to-powdery-mildew
#6
Yingbo Li, Qingwei Li, Guimei Guo, Ting He, Runhong Gao, Muhammad Faheem, Jianhua Huang, Ruiju Lu, Chenghong Liu
Somatic embryogenesis receptor-like kinases (SERKs) play an essential role in plant response to pathogen infection. Here we identified three SERK genes ( HvSERK1/2/3 ) from barley, and aimed to determine their implication in defense responses to barley powdery mildew ( Bgh ). Although HvSERK1/2/3 share the characteristic domains of the SERK family, only HvSERK2 was significantly induced in barley leaves during Bgh infection. The expression of HvSERK2 was rapidly induced by hydrogen peroxide (H₂O₂) treatment, but not by treatment with salicylic acid (SA), methyl jasmonate (MeJA), ethephon (ETH), or abscisic acid (ABA)...
April 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29666330/whitefly-and-aphid-inducible-promoters-of-arabidopsis-thaliana-l
#7
Neeraj Kumar Dubey, Devesh Kumar Mishra, Asif Idris, Deepti Nigam, Pradhyumna Kumar Singh, Samir V Sawant
Lack of regulated expression and tissue specificity are the major drawbacks of plant and virus-derived constitutive promoters. A precise tissue or site-specific expression, facilitate regulated expression of proteins at the targeted time and site. Publically available microarray data on whitefly and aphid infested Arabidopsis thaliana L. was used to identify whitefly and aphid-inducible genes. The qRT-PCR further validated the inducible behaviour of these genes under artificial infestation. Promoter sequences of genes were retrieved from the Arabidopsis Information Resources database with their corresponding 5'UTR and cloned from the A...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29666162/two-abscisic-acid-responsive-plastid-lipase-genes-involved-in-jasmonic-acid-biosynthesis-in-arabidopsis-thaliana
#8
Kun Wang, Qiang Guo, John E Froehlich, Hope Lynn Hersh, Agnieszka Zienkiewicz, Gregg A Howe, Christoph Benning
Chloroplast membranes with their unique lipid composition are crucial for photosynthesis. Maintenance of the chloroplast membranes requires finely tuned lipid anabolic and catabolic reactions. Despite the presence of a large number of predicted lipid-degrading enzymes in the chloroplasts, their biological functions remain largely unknown. Recently, we described PLASTID LIPASE1 (PLIP1), a plastid phospholipase A1 that contributes to seed oil biosynthesis. The Arabidopsis thaliana genome encodes two putative PLIP1 paralogs, which we designated PLIP2 and PLIP3...
April 17, 2018: Plant Cell
https://www.readbyqxmd.com/read/29660240/ros-signaling-and-stomatal-movement-in-plant-responses-to-drought-stress-and-pathogen-attack
#9
REVIEW
Junsheng Qi, Chun-Peng Song, Baoshan Wang, Jianmin Zhou, Jaakko Kangasjärvi, Jian-Kang Zhu, Zhizhong Gong
Stomata, the pores formed by a pair of guard cells, are the main gateways for water transpiration and photosynthetic CO2 exchange, as well as pathogen invasion in land plants. Guard cell movement is regulated by a combination of environmental factors including water status, light, CO2 levels and pathogen attack, as well as endogenous signals such as abscisic acid and apoplastic reactive oxygen species (ROS). Under abiotic and biotic stress conditions, extracellular ROS are mainly produced by plasma membrane-localized NADPH oxidases, whereas intracellular ROS are produced in multiple organelles...
April 16, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29660183/interaction-of-maternal-environment-and-allelic-differences-in-seed-vigour-genes-determines-seed-performance-in-brassica-oleracea
#10
Sajjad Awan, Steven Footitt, William E Finch-Savage
Seed vigour is a key trait essential for the production of sustainable and profitable crops. The genetic basis of variation in seed vigour has recently been determined in Brassica oleracea, but the relative importance of the interaction with parental environment is unknown. We produced seeds under a range of maternal environments, including global warming scenarios. Lines were compared that had the same genetic background, but different alleles (high and low vigour) at QTLs responsible for determining seed vigour by altering ABA content and sensitivity...
April 16, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29659577/transcription-factor-hat1-is-a-substrate-of-snrk2-3-kinase-and-negatively-regulates-aba-synthesis-and-signaling-in-arabidopsis-responding-to-drought
#11
Wenrong Tan, Dawei Zhang, Huapeng Zhou, Ting Zheng, Yanhai Yin, Honghui Lin
Drought is a major threat to plant growth and crop productivity. The phytohormone abscisic acid (ABA) plays a critical role in plant response to drought stress. Although ABA signaling-mediated drought tolerance has been widely investigated in Arabidopsis thaliana, the feedback mechanism and components negatively regulating this pathway are less well understood. Here we identified a member of Arabidopsis HD-ZIP transcription factors HAT1 which can interacts with and be phosphorylated by SnRK2s. hat1hat3, loss-of-function mutant of HAT1 and its homolog HAT3, was hypersensitive to ABA in primary root inhibition, ABA-responsive genes expression, and displayed enhanced drought tolerance, whereas HAT1 overexpressing lines were hyposensitive to ABA and less tolerant to drought stress, suggesting that HAT1 functions as a negative regulator in ABA signaling-mediated drought response...
April 16, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29658925/measuring-gene-expression-in-bombarded-barley-aleurone-layers-with-increased-throughput
#12
Grace Uwase, Taylor P Enrico, David S Chelimo, Benjamin R Keyser, Russell R Johnson
The aleurone layer of barley grains is an important model system for hormone-regulated gene expression in plants. In aleurone cells, genes required for germination or early seedling development are activated by gibberellin (GA), while genes associated with stress responses are activated by abscisic acid (ABA). The mechanisms of GA and ABA signaling can be interrogated by introducing reporter gene constructs into aleurone cells via particle bombardment, with the resulting transient expression measured using enzyme assays...
March 30, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29656220/synergistic-effect-of-the-combined-bio-fungicides-%C3%AE%C2%B5-poly-l-lysine-and-chitooligosaccharide-in-controlling-grey-mould-botrytis-cinerea-in-tomatoes
#13
Guangzheng Sun, Qichao Yang, Ancheng Zhang, Jia Guo, Xinjie Liu, Yang Wang, Qing Ma
The antifungal properties and the induction of resistance by ε-poly-l-lysine (ε-PL) and chitooligosaccharide (COS) were examined to find an alternative to synthetic fungicides currently used in the control of the devastating fungal pathogen Botrytis cinerea, the causal agent of grey mould disease of tomatoes. As presented herein, this combined treatment (200 mg/L ε-PL + 400 mg/L COS) was found to have optimal in vitro antifungal activities, achieving an inhibition rate of 90.22%. In vivo assays with these combined bio-fungicides, under greenhouse conditions using susceptible tomato plants, demonstrated good protection against severe grey mould...
April 4, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29655848/impacts-of-exogenous-pollutant-bisphenol-a-on-characteristics-of-soybeans
#14
Xingyi Li, Lihong Wang, Fei Shen, Qing Zhou, Xiaohua Huang
Bisphenol A (BPA) is an endocrine disruptor that is ubiquitous in the environment. Previous studies have focused on the effects of BPA on plants to assess the ecological risk of BPA in the environment. To evaluate the effects of BPA on plant biological characters more systematically, we investigated the biological characters of above-ground and under-ground organs of soybean plants exposed to BPA. Meanwhile, the mechanisms for the observed changes were also analyzed from the view of hormone levels and photosynthesis...
April 12, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29653435/functional-characterization-of-the-gene-promoter-for-an-elaeis-guineensis-phosphate-starvation-inducible-high-affinity-phosphate-transporter-in-both-homologous-and-heterologous-model-systems
#15
Farzaneh Ahmadi, Siti Nor Akmar Abdullah, Saeid Kadkhodaei, Siti Mariyam Ijab, Luqman Hamzah, Maheran Abdul Aziz, Zaharah A Rahman, Sharifah Shahrul Rabiah Syed Alwee
Oil palm is grown in tropical soils with low bioavailability of Pi. A cDNA clone specifically expressed under phosphate-starvation condition in oil palm roots was identified as a high-affinity phosphate transporter (EgPHT1). The deduced amino acid sequence has 6 transmembrane domains each at the N- and C-termini separated by a hydrophilic linker. Comparison of promoter motifs within 1500 bp upstream of ATG of 10 promoters from high- and low-affinity phosphate transporter from both dicots and monocots including EgPHT1 was performed...
April 9, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29652829/molecular-and-ultrastructural-mechanisms-underlying-yellow-dwarf-symptom-formation-in-wheat-after-infection-of-barley-yellow-dwarf-virus
#16
Wei Rong, Xindong Wang, Xifeng Wang, Sebastien Massart, Zengyan Zhang
Wheat ( Tritium aestivum L.) production is essential for global food security. Infection of barley yellow dwarf virus-GAV (BYDV-GAV) results in wheat showing leaf yellowing and plant dwarfism symptom. To explore the molecular and ultrastructural mechanisms underlying yellow dwarf symptom formation in BYDV-GAV-infected wheat, we investigated the chloroplast ultrastructure via transmission electron microscopy (TEM), examined the contents of the virus, H₂O₂, and chlorophyll in Zhong8601, and studied the comparative transcriptome through microarray analyses in the susceptible wheat line Zhong8601 after virus infection...
April 13, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29651380/a-combined-pathway-of-organogenesis-and-somatic-embryogenesis-for-an-efficient-large-scale-propagation-in-date-palm-phoenix-dactylifera-l-cv-mejhoul
#17
Mouaad Amine Mazri, Reda Meziani, Ilham Belkoura, Boutaïna Mokhless, Souad Nour
An efficient regeneration system via a combined pathway of organogenesis and somatic embryogenesis was developed for date palm ( Phoenix dactylifera L.) cv. Mejhoul. Adventitious buds were obtained from shoot-tip explants with a frequency of 53.3% after 9 months of culture: 6 months on half-strength Murashige and Skoog (MS/2) medium containing 14.2 µM indole-3-acetic acid (IAA), 13.4 µM 1-naphthaleneacetic acid (NAA) and 0.5 µM 6-(dimethylallylamino) purine (2iP), and 3 months on MS/2 medium supplemented with 1...
April 2018: 3 Biotech
https://www.readbyqxmd.com/read/29649745/metabolomics-guided-investigations-of-unintended-effects-of-the-expression-of-the-hydroxycinnamoyl-quinate-hydroxycinnamoyltransferase-hqt1-gene-from-cynara-cardunculus-var-scolymus-in-nicotiana-tabacum-cell-cultures
#18
S P Mudau, P A Steenkamp, L A Piater, M De Palma, M Tucci, N E Madala, I A Dubery
Chlorogenic acids (CGAs) are phenolic compounds biosynthesized in the phenylpropanoid pathway, with hydroxycinnamoyl quinate hydroxycinnamoyltransferase (HQT) as the key enzyme. Variation of CGAs has been noted in different plants, with globe artichoke (Cynara cardunculus var. scolymus L.) producing high amounts and a diverse spectrum of CGAs in its leaves. In the current study, the effect of overexpression of the hqt1 transgene from globe artichoke in tobacco was evaluated at the metabolome level. Here, metabolomic approaches based on ultra-high performance liquid chromatography coupled to mass spectrometry, together with chemometric models such as principal component analysis and orthogonal partial least square discriminant analysis, were employed to evaluate altered metabolic changes due to hqt1 overexpression...
April 5, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29648603/phyd-prevents-secondary-dormancy-establishment-of-seeds-exposed-to-high-temperature-and-is-associated-with-lower-pil5-accumulation
#19
Catherine Martel, Logan K Blair, Kathleen Donohue
Dormancy cycling controls the seasonal conditions under which seeds germinate, which strongly influence growth and survival of plants. Several endogenous and environmental signals affect the dormancy status of seeds. Factors such as time, light and temperature influence the balance between abscisic acid (ABA) and gibberellic acid (GA), two phytohormones that play a key role in seed dormancy and germination. High temperatures have been shown to increase ABA level and prevent seed germination at high temperature, a process known as thermoinhibition...
April 10, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29643863/mutation-in-rice-abscisic-acid2-results-in-cell-death-enhanced-disease-resistance-altered-seed-dormancy-and-development
#20
Yongxiang Liao, Que Bai, Peizhou Xu, Tingkai Wu, Daiming Guo, Yongbin Peng, Hongyu Zhang, Xiaoshu Deng, Xiaoqiong Chen, Ming Luo, Asif Ali, Wenming Wang, Xianjun Wu
Lesion mimic mutants display spontaneous cell death, and thus are valuable for understanding the molecular mechanism of cell death and disease resistance. Although a lot of such mutants have been characterized in rice, the relationship between lesion formation and abscisic acid (ABA) synthesis pathway is not reported. In the present study, we identified a rice mutant, lesion mimic mutant 9150 ( lmm9150 ), exhibiting spontaneous cell death, pre-harvest sprouting, enhanced growth, and resistance to rice bacterial and blast diseases...
2018: Frontiers in Plant Science
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