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https://www.readbyqxmd.com/read/29214380/differential-expression-of-gibberellin-and-abscisic-acid-related-genes-implies-their-roles-in-the-bud-activity-dormancy-transition-of-tea-plants
#1
Chuan Yue, Hongli Cao, Xinyuan Hao, Jianming Zeng, Wenjun Qian, Yuqiong Guo, Naixing Ye, Yajun Yang, Xinchao Wang
Thirty genes involved in GA and ABA metabolism and signalling were identified, and the expression profiles indicated that they play crucial roles in the bud activity-dormancy transition in tea plants. Gibberellin (GA) and abscisic acid (ABA) are fundamental phytohormones that extensively regulate plant growth and development, especially bud dormancy and sprouting transition in perennial plants. However, there is little information on GA- and ABA-related genes and their expression profiles during the activity-dormancy transition in tea plants...
December 6, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/29205921/the-dioxygenase-gim2-functions-in-seed-germination-by-altering-gibberellin-production-in-arabidopsis
#2
Wei Xiong, Tiantian Ye, Xuan Yao, Xiong Liu, Sheng Ma, Xi Chen, Ming-Luan Chen, Yu-Qi Feng, Yan Wu
The phytohormones gibberellic acid (GA) and abscisic acid (ABA) antagonistically control seed germination. High levels of GA favor seed germination, whereas high levels of ABA hinder this process. The direct relationship between GA biosynthesis and seed germination ability need further investigation. Here, we identified the ABA-insensitive gain-of-function mutant germination insensitive to ABA mutant 2 (gim2) by screening a population of XVE T-DNA-tagged mutant lines. Based on two loss-of-function gim2-ko mutant lines, the disruption of GIM2 function caused a delay in seed germination...
December 4, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29204899/secondary-metabolism-in-fusarium-fujikuroi-strategies-to-unravel-the-function-of-biosynthetic-pathways
#3
REVIEW
Slavica Janevska, Bettina Tudzynski
The fungus Fusarium fujikuroi causes bakanae disease of rice due to its ability to produce the plant hormones, the gibberellins. The fungus is also known for producing harmful mycotoxins (e.g., fusaric acid and fusarins) and pigments (e.g., bikaverin and fusarubins). However, for a long time, most of these well-known products could not be linked to biosynthetic gene clusters. Recent genome sequencing has revealed altogether 47 putative gene clusters. Most of them were orphan clusters for which the encoded natural product(s) were unknown...
December 4, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29192439/-cloning-and-expression-analysis-of-transcription-factor-asmyb1-and-asmyb2-from-aquilaria-sinensis
#4
Ying-Ying Feng, Xian-Juan Dong, Xiao Liu, Ya-Ru Yan, Jin-Ling Wang, She-Po Shi, Xiao-Hui Wang, Peng-Fei Tu
The MYB gene family comprises one of the richest groups of transcription factors in plants. The full length of two MYB genes were isolated through heterologous screening of Aquilaria sinensis calli transcriptome data, and the reverse transcription PCR was performed to obstain the corrected MYB clones, named AsMYB1, AsMYB2. The MYB transmembrane domain and phylogenetic analysis were predicted by different software to analyze the bioinformatics of MYB proteins. The transcript level of AsMYB1, AsMYB2 was performed by real-time quantitative RT-PCR in different tissues and in responds to abiotic stresses including salt, cold, metal and drought stress, and hormone treatments including abscisic acid (ABA), salicylic acid (SA), gibberellins (GA3) and methyl jasmonate (MeJA) treatment...
September 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29192140/the-gibberellin-gid1-della-signalling-module-exists-in-evolutionarily-ancient-conifers
#5
Ran Du, Shihui Niu, Yang Liu, Xinrui Sun, Ilga Porth, Yousry A El-Kassaby, Wei Li
Gibberellins (GAs) participate in controlling various aspects of basic plant growth responses. With the exception of bryophytes, GA signalling in land plants, such as lycophytes, ferns and angiosperms, is mediated via GIBBERELLIN-INSENSITIVE DWARF1 (GID1) and DELLA proteins. To explore whether this GID1-DELLA mechanism is present in pines, we cloned an orthologue (PtGID1) of Arabidopsis AtGID1a and two putative DELLA proteins (PtDPL; PtRGA) from Pinus tabuliformis, a widespread indigenous conifer species in China, and studied their recombinant proteins...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29189719/transcriptional-and-hormonal-regulation-of-weeping-trait-in-salix-matsudana
#6
Juanjuan Liu, Yanfei Zeng, Pengcheng Yan, Caiyun He, Jianguo Zhang
Salix matsudana is a large and rapidly-growing tree, with erect or spreading branchlets (upright willow). However, S. matsudana var. pseudomatsudana is one of the varietas, with pendulous branchlets (weeping willow). It has high ornamental value for its graceful pendulous branches. In order to study the molecular basis for this weeping trait, leaves and stems collected at different developmental stages were analyzed using RNA-seq coupled with digital gene expression. Although weeping trees are used worldwide as landscape plants, little is known about the genes that control weeping...
November 30, 2017: Genes
https://www.readbyqxmd.com/read/29180380/osmir396d-mirna-affects-gibberellin-and-brassinosteroid-signaling-to-regulate-plant-architecture
#7
Yongyan Tang, Huanhuan Liu, Siyi Guo, Bo Wang, Zhitao Li, Kang Chong, Yunyuan Xu
Genetic improvement of plant architecture is one of the strategies for increasing the yield potential of rice (Oryza sativa). Although great progress has been made in the understanding of plant architecture regulation, the precise mechanism is still an urgent need to be revealed. Here, we report that over-expression of OsMIR396d in rice results in semi-dwarf and increased leaf angle, a typical phenotype of BR enhanced mutant. OsmiR396d is involved in the interaction network of BR and GA signal. In OsMIR396d over-expression plants, BR signaling was enhanced...
November 27, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29162040/cloning-and-expression-of-bpmyc4-and-bpbhlh9-genes-and-the-role-of-bpbhlh9-in-triterpenoid-synthesis-in-birch
#8
Jing Yin, Xin Li, Yaguang Zhan, Ying Li, Ziyue Qu, Lu Sun, Siyao Wang, Jie Yang, Jialei Xiao
BACKGROUND: Birch (Betula platyphylla Suk.) contains triterpenoids with anti-HIV and anti-tumor pharmacological activities. However, the natural abundance of these triterpenoids is low, and their chemical synthesis is costly. Transcription factors have the ability to regulate the metabolite pathways of triterpenoids via multi-gene control, thereby improving metabolite yield. Thus, transcription factors have the potential to facilitate the production of birch triterpenoids. Plant bHLH (basic helix-loop-helix) transcription factors play important roles in stress response and secondary metabolism...
November 21, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29156607/calcium-dependent-protein-kinases-in-phytohormone-signaling-pathways
#9
REVIEW
Wuwu Xu, Wenchao Huang
Calcium-dependent protein kinases (CPKs/CDPKs) are Ca(2+)-sensors that decode Ca(2+) signals into specific physiological responses. Research has reported that CDPKs constitute a large multigene family in various plant species, and play diverse roles in plant growth, development, and stress responses. Although numerous CDPKs have been exhaustively studied, and many of them have been found to be involved in plant hormone biosynthesis and response mechanisms, a comprehensive overview of the manner in which CDPKs participate in phytohormone signaling pathways, regulating nearly all aspects of plant growth, has not yet been undertaken...
November 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29150547/the-tomato-della-protein-procera-acts-in-guard-cells-to-promote-stomatal-closure
#10
Ido Nir, Hagai Shohat, Irina Panizel, Neil E Olszewski, Asaph Aharoni, David Weiss
Plants employ stomatal closure and reduced growth to avoid water deficiency damage. Reduced levels of the growth-promoting hormone gibberellin (GA) lead to increased tolerance to water deficit, but the underlying mechanism is unknown. Here, we show that the tomato (Solanum lycopersicum) DELLA protein PROCERA (PRO), a negative regulator of GA signaling, acts in guard cells to promote stomatal closure and reduce water loss in response to water deficiency by increasing abscisic acid (ABA) sensitivity. The loss-of-function pro mutant exhibited increased stomatal conductance and rapid wilting under water-deficit stress...
November 17, 2017: Plant Cell
https://www.readbyqxmd.com/read/29146357/effects-of-exogenous-application-of-cppu-naa-and-ga4-7-on-parthenocarpy-and-fruit-quality-in-cucumber-cucumis-sativus-l
#11
Chunlu Qian, Nannan Ren, Jingye Wang, Qiang Xu, Xuehao Chen, Xiaohua Qi
In protected vegetable fields, plant growth regulators are often used to improve cucumber fruit growth. However, the effects of plant growth regulators on the appearance and nutritional quality of cucumber (Cucumis sativus L.) remain largely unknown. In the present study, 100 mg/L N-(2-chloro-4-pyridyl)-N'-phenylurea (CPPU), naphthaleneacetic acid (NAA) or gibberellin A4+A7 (GA4+7) was applied to the female cucumber flowers 1 day before anthesis and at anthesis. The CPPU, NAA and GA4+7 treatments resulted in parthenocarpic fruits with similar weights, sizes and shapes as the pollinated fruits...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29135031/comparative-proteomics-illustrates-the-molecular-mechanism-of-potato-solanum-tuberosum-l-tuberization-inhibited-by-exogenous-gibberellins-in-vitro
#12
Lixiang Cheng, Yuping Wang, Yueshan Liu, Qingquan Zhang, Huihui Gao, Zhang Feng
Among the multiple environmental signals and hormonal factors regulating potato tuberization, gibberellins (GAs) are important components of the signaling pathways in these processes. To understand the GAs-signaling response mechanism of potato tuberization, a comparative proteomics approach was applied to analyze proteome change of potato tuberization in vitro subjected to a range of exogenous GA3 treatments (0, 0.01, 0.1 and 1.0 μΜ) using two-dimensional gel electrophoresis. Quantitative image analyses showed that a total of 37 protein spots have their abundance significantly altered more than 2-fold...
November 14, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29134140/genome-wide-identification-and-characterization-of-gras-transcription-factors-in-tomato-solanum-lycopersicum
#13
Yiling Niu, Tingting Zhao, Xiangyang Xu, Jingfu Li
Solanum lycopersicum, belonging to Solanaceae, is one of the commonly used model plants. The GRAS genes are transcriptional regulators, which play a significant role in plant growth and development, and the functions of several GRAS genes have been recognized, such as, axillary shoot meristem formation, radial root patterning, phytohormones (gibberellins) signal transduction, light signaling, and abiotic/biotic stress; however, only a few of these were identified and functionally characterized. In this study, a gene family was analyzed comprehensively with respect to phylogeny, gene structure, chromosomal localization, and expression pattern; the 54 GRAS members were screened from tomato by bioinformatics for the first time...
2017: PeerJ
https://www.readbyqxmd.com/read/29114256/involvement-of-paclobutrazol-resistance6-kidari-an-atypical-bhlh-transcription-factor-in-auxin-responses-in-arabidopsis
#14
Kaijie Zheng, Yating Wang, Na Zhang, Qiming Jia, Xutong Wang, Chunjiang Hou, Jin-Gui Chen, Shucai Wang
Auxin regulates nearly all aspects of plant growth and development including cell division, cell elongation and cell differentiation, which are achieved largely by rapid regulation of auxin response genes. However, the functions of a large number of auxin response genes remain uncharacterized. Paclobutrazol Resistance (PRE) proteins are non-DNA binding basic helix-loop-helix transcription factors that have been shown to be involved in gibberellin and brassinosteroid signaling, and light responses in Arabidopsis...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29114081/the-energy-signalling-hub-snrk1-is-important-for-sucrose-induced-hypocotyl-elongation
#15
Noriane M Simon, Jelena Kusakina, Ángela Fernández-López, Anupama Chembath, Fiona E Belbin, Antony N Dodd
Emerging seedlings respond to environmental conditions such as light and temperature to optimize their establishment. Seedlings grow initially through elongation of the hypocotyl, which is regulated by signalling pathways that integrate environmental information to regulate seedling development. The hypocotyls of Arabidopsis thaliana also elongate in response to sucrose. Here, we investigated the role of cellular sugar-sensing mechanisms in the elongation of hypocotyls in response to sucrose. We focused upon the role of SnRK1, which is a sugar-signalling hub that regulates metabolism and transcription in response to cellular energy status...
November 7, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29111713/comprehensive-transcriptome-analysis-of-phytohormone-biosynthesis-and-signaling-genes-in-the-flowers-of-chinese-chinquapin-castanea-henryi
#16
Xiaoming Fan, Deyi Yuan, Xiaoming Tian, Zhoujun Zhu, Meilan Liu, Heping Cao
Chinese chinquapin (Castanea henryi) nut provides a rich source of starch and nutrients as food and feed, but its yield is restricted by a low ratio of female to male flowers. Little is known about the developmental programs underlying sex differentiation of the flowers. To investigate the involvement of phytohormones during sex differentiation, we described the morphology of male and female floral organs and the cytology of flower sex differentiation, analyzed endogenous levels of indole-3-acetic acid (IAA), gibberellins (GAs), cytokinins (CKs) and abscisic acid (ABA) in the flowers, investigated the effects of exogenous hormones on flower development, and evaluated the expression profiles of genes related to biosyntheses and signaling pathways of these four hormones using RNA-Seq combined with qPCR...
November 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29110072/the-genetic-and-molecular-basis-of-crop-height-based-on-a-rice-model
#17
REVIEW
Fang Liu, Pandi Wang, Xiaobo Zhang, Xiaofei Li, Xiaohong Yan, Donghui Fu, Gang Wu
This review presents genetic and molecular basis of crop height using a rice crop model. Height is controlled by multiple genes with potential to be manipulated through breeding strategies to improve productivity. Height is an important factor affecting crop architecture, apical dominance, biomass, resistance to lodging, tolerance to crowding and mechanical harvesting. The impressive increase in wheat and rice yield during the 'green revolution' benefited from a combination of breeding for high-yielding dwarf varieties together with advances in agricultural mechanization, irrigation and agrochemical/fertilizer use...
November 6, 2017: Planta
https://www.readbyqxmd.com/read/29082248/gibberellic-acid-production-by-different-fermentation-systems-using-citric-pulp-as-substrate-support
#18
Juliana de Oliveira, Cristine Rodrigues, Luciana P S Vandenberghe, Marcela C Câmara, Nelson Libardi, Carlos R Soccol
Gibberellic acid (GA3) is an important phytohormone, a member of gibberellins family, which acts as a promoter and regulator of plant growth. This study aimed to evaluate GA3 production by Fusarium moniliforme LPB03 and Gibberella fujikuroi LPB06 using different techniques of fermentation, solid state fermentation (SSF), submerged fermentation (SmF), and semisolid state fermentation (SSSF), and different types of bioreactors. In all techniques, citric pulp (CP), a subproduct obtained from the extraction of orange juice, was employed as the substrate/support...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29081786/probing-the-single-key-amino-acid-responsible-for-the-novel-catalytic-function-of-ent-kaurene-oxidase-supported-by-nadph-cytochrome-p450-reductases-in-tripterygium-wilfordii
#19
Ping Su, Hongyu Guan, Yifeng Zhang, Xing Wang, Linhui Gao, Yujun Zhao, Tianyuan Hu, Jiawei Zhou, Baowei Ma, Lichan Tu, Yuru Tong, Luqi Huang, Wei Gao
Tripterygium wilfordii produces not only ent-kaurene, which is an intermediate of gibberellin (GA) biosynthesis in flowering plants, but also 16α-hydroxy-ent-kaurane, whose physiological role has not been characterized. The two compounds are biosynthesized from the universal diterpenoid precursor (E,E,E)-geranylgeranyl diphosphate (GGPP) by diterpene synthases, which have been discovered and functionally characterized in T. wilfordii. Here, we described the functional characterization of four cytochrome P450 reductases (TwCPR) and one ent-kaurene oxidase (TwKO)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29080998/analysis-of-the-global-regulator-lae1-uncovers-a-connection-between-lae1-and-the-histone-acetyltransferase-hat1-in-fusarium-fujikuroi
#20
Eva-Maria Niehaus, Lena Rindermann, Slavica Janevska, Martin Münsterkötter, Ulrich Güldener, Bettina Tudzynski
The fungus Fusarium fujikuroi causes "bakanae" disease of rice due to its ability to produce gibberellins (GAs), a family of plant hormones. Recent genome sequencing revealed the genetic capacity for the biosynthesis of 46 additional secondary metabolites besides the industrially produced GAs. Among them are the pigments bikaverin and fusarubins, as well as mycotoxins, such as fumonisins, fusarin C, beauvericin, and fusaric acid. However, half of the potential secondary metabolite gene clusters are silent. In recent years, it has been shown that the fungal specific velvet complex is involved in global regulation of secondary metabolism in several filamentous fungi...
October 28, 2017: Applied Microbiology and Biotechnology
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