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https://www.readbyqxmd.com/read/28925957/genome-wide-analysis-of-the-biosynthesis-and-deactivation-of-gibberellin-dioxygenases-gene-family-in-camellia-sinensis-l-o-kuntze
#1
Cheng Pan, Kunhong Tian, Qiuyan Ban, Leigang Wang, Qilu Sun, Yan He, Yuanfei Yang, Yuting Pan, Yeyun Li, Jiayue Jiang, Changjun Jiang
Gibberellins (GAs), a class of diterpenoid phytohormones, play a key role in regulating diverse processes throughout the life cycle of plants. Bioactive GA levels are rapidly regulated by Gibberellin-dioxygenases (GAox), which are involved in the biosynthesis and deactivation of gibberellin. In this manuscript, a comprehensive genome-wide analysis was carried out to find all GAox in Camellia sinensis. For the first time in a tea plant, 14 CsGAox genes, containing two domains, DIOX_N (PF14226) and 2OG-FeII_Oxy, were identified (PF03171)...
September 19, 2017: Genes
https://www.readbyqxmd.com/read/28924726/overexpression-of-the-transcription-factor-nf-yc9-confers-abscisic-acid-hypersensitivity-in-arabidopsis
#2
Chao Bi, Yu Ma, Xiao-Fang Wang, Da-Peng Zhang
Nuclear factor Y (NF-Y) family proteins are involved in many developmental processes and responses to environmental cues in plants, but whether and how they regulate phytohormone abscisic acid (ABA) signaling need further studies. In the present study, we showed that over-expression of the NF-YC9 gene confers ABA hypersensitivity in both the early seedling growth and stomatal response, while down-regulation of NF-YC9 does not affect ABA response in these processes. We also showed that over-expression of the NF-YC9 gene confers salt and osmotic hypersensitivity in early seedling growth, which is likely to be directly associated with the ABA hypersensitivity...
September 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28922763/chicory-r2r3-myb-transcription-factors-cimyb5-and-cimyb3-regulate-fructan-1-exohydrolase-expression-in-response-to-abiotic-stress-and-hormonal-cues
#3
Hongbin Wei, Hongbo Zhao, Tao Su, Anja Bausewein, Steffen Greiner, Karsten Harms, Thomas Rausch
In the biennial Cichorium intybus, inulin-type fructans accumulate in the taproot during the first year. Upon cold or drought exposure, fructans are degraded by fructan exohydrolases, affecting inulin yield and degree of polymerization. While stress-induced expression of 1-FEH genes has been thoroughly explored, the transcriptional network mediating these responses has remained unknown. In this study, several R2R3-MYB transcriptional regulators were analysed for their possible involvement in 1-FEH regulation via transient transactivation of 1-FEH target promoters and for in vivo co-expression with target genes under different stress and hormone treatments...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28919033/non-26s-proteasome-endomembrane-trafficking-pathways-in-aba-signaling
#4
REVIEW
Feifei Yu, Qi Xie
The phytohormone abscisic acid (ABA) is a vital endogenous messenger that regulates diverse physiological processes in plants. The regulation of ABA signaling has been well studied at both the transcriptional and translational levels. Post-translational modification of key regulators in ABA signaling by the 26S ubiquitin proteasome pathway is well known. Recently, increasing evidence demonstrates that atypical turnover of key regulators by the endocytic trafficking pathway and autophagy also play vital roles in ABA perception, signaling, and action...
September 14, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28918122/pre-harvest-uv-c-irradiation-triggers-vocs-accumulation-with-alteration-of-antioxidant-enzymes-and-phytohormones-in-strawberry-leaves
#5
Yanqun Xu, Zisheng Luo, Marie Thérèse Charles, Daniel Rolland, Dominique Roussel
Recent studies have highlighted the biological and physiological effects of pre-harvest ultraviolet (UV)-C treatment on growing plants. However, little is known about the involvement of volatile organic compounds (VOCs) and their response to this treatment. In this study, strawberry plants were exposed to three different doses of UV-C radiation for seven weeks (a low dose: 9.6kJm(-2); a medium dose: 15kJm(-2); and a high-dose: 29.4kJm(-2)). Changes in VOC profiles were investigated and an attempt was made to identify factors that may be involved in the regulation of these alterations...
September 8, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28916594/della-gaf1-complex-is-a-main-component-in-gibberellin-feedback-regulation-of-ga20ox2-in-arabidopsis
#6
Jutarou Fukazawa, Masahiko Mori, Satoshi Watanabe, Chika Miyamoto, Takeshi Ito, Yohsuke Takahashi
Gibberellins (GAs) are phytohormones that regulate many aspects of plant growth and development, including germination, elongation, flowering, and floral development. Negative feedback regulation contributes to homeostasis of the GA level. DELLAs are negative regulators of GA signaling and are rapidly degraded in the presence of GAs. DELLAs regulate many target genes, including AtGA20ox2, encoding the GA-biosynthetic enzyme GA 20-oxidase. As DELLAs do not have an apparent DNA-binding motif, transcription factors that act in association with DELLA are necessary for regulating the target genes...
September 15, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28900441/bacillus-amyloliquefaciens-confers-tolerance-to-various-abiotic-stresses-and-modulates-plant-response-to-phytohormones-through-osmoprotection-and-gene-expression-regulation-in-rice
#7
Shalini Tiwari, Vivek Prasad, Puneet S Chauhan, Charu Lata
Being sessile in nature, plants have to withstand various adverse environmental stress conditions including both biotic and abiotic stresses. Comparatively, abiotic stresses such as drought, salinity, high temperature, and cold pose major threat to agriculture by negatively impacting plant growth and yield worldwide. Rice is one of the most widely consumed staple cereals across the globe, the production and productivity of which is also severely affected by different abiotic stresses. Therefore, several crop improvement programs are directed toward developing stress tolerant rice cultivars either through marker assisted breeding or transgenic technology...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28899963/s5h-dmr6-encodes-a-salicylic-acid-5-hydroxylase-that-fine-tunes-salicylic-acid-homeostasis
#8
Yanjun Zhang, Li Zhao, Jiangzhe Zhao, Yujia Li, Jinbin Wang, Rong Guo, Su-Sheng Gan, Chang-Jun Liu, Kewei Zhang
The phytohormone salicylic acid (SA) plays essential roles in biotic and abiotic responses, plant development, and leaf senescence. 2,5-Dihydroxybenzoic acid (2,5-DHBA or gentisic acid) is one of the most commonly occurring aromatic acids in green plants and is assumed to be generated from SA, but the enzymes involved in its production remain obscure. DMR6 (Downy Mildew Resistant 6, At5g24530) has been proven essential in plant immunity of Arabidopsis, but its biochemical properties are not well understood...
September 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28892802/regulation-of-cellulose-synthesis-in-response-to-stress
#9
REVIEW
Christopher Kesten, Alexandra Menna, Clara Sánchez-Rodríguez
The cell wall is a complex polysaccharide network that provides stability and protection to the plant and is one of the first layers of biotic and abiotic stimuli perception. A controlled remodeling of the primary cell wall is essential for the plant to adapt its growth to environmental stresses. Cellulose, the main component of plant cell walls is synthesized by plasma membrane-localized cellulose synthases moving along cortical microtubule tracks. Recent advancements demonstrate a tight regulation of cellulose synthesis at the primary cell wall by phytohormone networks...
September 8, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28891950/impact-of-silicon-in-plant-biomass-production-focus-on-bast-fibres-hypotheses-and-perspectives
#10
REVIEW
Marie Luyckx, Jean-Francois Hausman, Stanley Lutts, Gea Guerriero
Silicon (Si) is an abundant element which, when supplied to plants, confers increased vigor and resistance to exogenous stresses, as well as enhanced stem mechanical strength. Plant species vary in their ability to take Si up and to accumulate it under the form of silicon dioxide (SiO₂) in their tissues: emblematic of this is the example of Poales, among which there is rice, a high Si accumulator. Monocots usually accumulate more Si than dicots; however, the impact that Si has on dicots, notably on economically important dicots, is a subject requiring further study and scientific efforts...
September 9, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28889908/resistance-of-fusarium-poae-in-arabidopsis-leaves-requires-mainly-functional-ja-and-et-signaling-pathways
#11
María Inés Dinolfo, Eliana Castañares, Sebastián A Stenglein
Fusarium poae has been considered as a minor species among those that cause the FHB disease but in recent years several researchers have documented a high frequency of occurrence in several crops. We evaluated the ability of F. poae to produce symptoms in A. thaliana leaves. Moreover, we analyzed the defense of A. thaliana against F. poae using SA, JA, and ET mutants and we monitored the expression level of genes involved in the main signaling pathways related to plant defense. Symptoms were observed in the inoculated leaves demonstrating the ability of F...
October 2017: Fungal Biology
https://www.readbyqxmd.com/read/28887590/transcriptome-and-phytohormone-analysis-reveals-a-comprehensive-phytohormone-and-pathogen-defence-response-in-pear-self-cross-pollination
#12
Dongqing Shi, Chao Tang, Runze Wang, Chao Gu, Xiao Wu, Shi Hu, Jin Jiao, Shaoling Zhang
Candidate genes were identified and the role of phytohormones such as JA-Me and ABA in the synthesis of S-RNase was emphasized in pear self-incompatibility. Self-incompatibility (SI) occurs widely in flowering plants as an intraspecific reproductive barrier. This phenomenon promotes variation within species, but for some species such as Pyrus, SI is a nuisance rather than a benefit in agricultural production. Although many studies have been conducted on SI in pears, its mechanism remains unclear. In this study, high-throughput Illumina RNA sequencing (RNA-seq) was used to identify SI-related genes in pear styles...
September 8, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28883825/seed-carotenoid-and-tocochromanol-composition-of-wild-fabaceae-species-is-shaped-by-phylogeny-and-ecological-factors
#13
Beatriz Fernández-Marín, Fátima Míguez, Leire Méndez-Fernández, Agustí Agut, José M Becerril, José I García-Plazaola, Ilse Kranner, Louise Colville
Carotenoids distribution and function in seeds have been very scarcely studied, notwithstanding their pivotal roles in plants that include photosynthesis and phytohormone synthesis, pigmentation, membrane stabilization and antioxidant activity. Their relationship with tocochromanols, whose critical role in maintaining seed viability has already been evidenced, and with chlorophylls, whose retention in mature seed is thought to have negative effects on storability, remain also unexplored. Here, we aimed at elucidating seed carotenoids relationship with tocochromanols and chlorophylls with regard to phylogenetic and ecological traits and at understanding their changes during germination...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28880725/synergistic-relationship-between-auxin-and-cytokinin-in-the-ovary-and-the-participation-of-the-transcription-factor-spatula
#14
J Irepan Reyes-Olalde, Víctor M Zúñiga-Mayo, Nayelli Marsch-Martínez, Stefan de Folter
The phytohormones auxin and cytokinin are key regulators of plant development, and both regulate almost all aspects of plant growth and development. Communication between auxin-cytokinin signaling pathways has been the subject of intense research. However, few studies have focused specifically on the development of the early gynoecium. We have recently discovered that cytokinin signaling plays a role in the regulation of auxin biosynthesis and transport in the ovary region of the gynoecium, and that the transcription factor SPATULA (SPT) is necessary...
September 7, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28880031/recent-advances-in-the-synthesis-of-analogues-of-phytohormones-strigolactones-with-ring-closing-metathesis-as-a-key-step
#15
Chiara Lombardi, Emma Artuso, Eleonora Grandi, Marco Lolli, Francesca Spirakys, Emanuele Priola, Cristina Prandi
In this paper, we synthesized and evaluated the biological activity of structural analogues of natural strigolactones in which the butenolide D-ring has been replaced with a γ-lactam. The key step to obtain the α,β-unsaturated-γ-lactam was an RCM on suitably substituted amides. Strigolactones (SLs) are plant hormones with various developmental functions. As soil signaling chemicals, they are required for establishing beneficial mycorrhizal plant/fungus symbiosis. Beside these auxinic roles, recently SLs have been successfully investigated as antitumoral agents...
September 7, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28879856/crispr-cas9-mediated-immunity-in-plants-against-pathogens
#16
Muhammad Sameeullah, Faheem Ahmed Khan, Göksel Özer, Noreen Aslam, Ekrem Gurel, Mohammad Tahir Waheed, Turan Karadeniz
Global crop production is highly threatened due to pathogen invasion. The huge quantity of pesticides application, although harmful to the environment and human health, is carried out to prevent the crop losses worldwide, every year. Therefore, understanding the molecular mechanisms of pathogenicity and plant resistance against pathogen is important. The resistance against pathogens is regulated by three important phytohormones viz. salicylic acid (SA), jasmonic acid (JA) and ethylene (ET). Here we review possible role of CRISPR technology to understand the plant pathogenicity by mutating genes responsible for pathogen invasion or up-regulating the phytohormones genes or resistant genes...
September 7, 2017: Current Issues in Molecular Biology
https://www.readbyqxmd.com/read/28878797/overexpression-of-hevea-brasiliensis-hbice1-enhances-cold-tolerance-in-arabidopsis
#17
Hong-Mei Yuan, Ying Sheng, Wei-Jie Chen, Yu-Qing Lu, Xiao Tang, Mo Ou-Yang, Xi Huang
Rubber trees (Hevea brasiliensis) were successfully introduced to south China in the 1950s on a large-scale; however, due to the climate, are prone to cold injury during the winter season. Increased cold tolerance is therefore an important goal, yet the mechanism underlying rubber tree responses to cold stress remains unclear. This study carried out functional characterization of HbICE1 (Inducer of CBF Expression 1) from H. brasiliensis. A nucleic protein with typical features of ICEs, HbICE1 was able to bind to MYC recognition sites and had strong transactivation activity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28878496/plant-growth-promoting-effect-of-bacillus-amyloliquefaciens-h-2-5-on-crop-plants-and-influence-on-physiological-changes-in-soybean-under-soil-salinity
#18
Min-Ji Kim, Ramalingam Radhakrishnan, Sang-Mo Kang, Young-Hyun You, Eun-Ju Jeong, Jong-Guk Kim, In-Jung Lee
This study was aimed to identify plant growth-promoting bacterial isolates from soil samples and to investigate their ability to improve plant growth and salt tolerance by analysing phytohormones production and phosphate solubilisation. Among the four tested bacterial isolates (I-2-1, H-1-4, H-2-3, and H-2-5), H-2-5 was able to enhance the growth of Chinese cabbage, radish, tomato, and mustard plants. The isolated bacterium H-2-5 was identified as Bacillus amyloliquefaciens H-2-5 based on 16S rDNA sequence and phylogenetic analysis...
July 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28878490/identification-and-expression-analysis-under-abiotic-stress-of-the-r2r3-myb-genes-in-ginkgo-biloba-l
#19
Xinliang Liu, Wanwen Yu, Xuhui Zhang, Guibin Wang, Fuliang Cao, Hua Cheng
The R2R3-MYB gene family is the largest MYB subfamily in plants and is involved in the regulation of plant secondary metabolism and specific morphogenesis, as well as the response to biotic and abiotic stress. However, a systematic identification and characterization of this gene family has not been carried out in Ginkgo biloba. In this study, we performed a transcriptome-wide survey from four tissues of G. biloba to determine the genetic variation and expression pattern of the R2R3-MYB genes. We analyzed 45 GbMYBs and identified 42 with a complete coding sequence via conserved motif searches...
July 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28877679/micrornas-participate-in-gene-expression-regulation-and-phytohormone-cross-talk-in-barley-embryo-during-seed-development-and-germination
#20
Bin Bai, Bo Shi, Ning Hou, Yanli Cao, Yijun Meng, Hongwu Bian, Muyuan Zhu, Ning Han
BACKGROUND: Small RNA and degradome sequencing have identified a large number of miRNA-target pairs in plant seeds. However, detailed spatial and temporal studies of miRNA-mediated regulation, which can reflect links between seed development and germination are still lacking. RESULTS: In this study, we extended our investigation on miRNAs-involved gene regulation by a combined analysis of seed maturation and germination in barley. Through bioinformatics analysis of small RNA sequencing data, a total of 1324 known miRNA families and 448 novel miRNA candidates were identified...
September 6, 2017: BMC Plant Biology
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