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"plant hormone"

Ambika Dudhate, Harshraj Shinde, Daisuke Tsugama, Shenkui Liu, Tetsuo Takano
Pearl millet is a cereal crop known for its high tolerance to drought, heat and salinity stresses as well as for its nutritional quality. The molecular mechanism of drought tolerance in pearl millet is unknown. Here we attempted to unravel the molecular basis of drought tolerance in two pearl millet inbred lines, ICMB 843 and ICMB 863 using RNA sequencing. Under greenhouse condition, ICMB 843 was found to be more tolerant to drought than ICMB 863. We sequenced the root transcriptome from both lines under control and drought conditions using an Illumina Hi-Seq platform, generating 139...
2018: PloS One
Irina Ivanova Vaseva, Enas Qudeimat, Thomas Potuschak, Yunlong Du, Pascal Genschik, Filip Vandenbussche, Dominique Van Der Straeten
The gaseous hormone ethylene plays a key role in plant growth and development, and it is a major regulator of stress responses. It inhibits vegetative growth by restricting cell elongation, mainly through cross-talk with auxins. However, it remains unknown whether ethylene controls growth throughout all plant tissues or whether its signaling is confined to specific cell types. We employed a targeted expression approach to map the tissue site(s) of ethylene growth regulation. The ubiquitin E3 ligase complex containing Skp1, Cullin1, and the F-box protein EBF1 or EBF2 (SCFEBF1/2 ) target the degradation of EIN3, the master transcription factor in ethylene signaling...
April 11, 2018: Proceedings of the National Academy of Sciences of the United States of America
Chao Zhang, Xi Peng, Xiaofeng Guo, Gaijuan Tang, Fengli Sun, Shudong Liu, Yajun Xi
Background: Switchgrass ( Panicum virgatum L.) is a model biofuel plant because of its high biomass, cellulose-richness, easy degradation to ethanol, and the availability of extensive genomic information. However, a little is currently known about the molecular responses of switchgrass plants to dehydration stress, especially multiple dehydration stresses. Results: Studies on the transcriptional profiles of 35-day-old tissue culture plants revealed 741 dehydration memory genes...
2018: Biotechnology for Biofuels
Shun-Wun Ke, Guan-Heng Chen, Chung-Tse Chen, Jason T C Tzen, Chin-Ying Yang
BACKGROUND: Tea is one of the most popular beverages in the world. There are many secondary metabolites can be found in tea such as anthocyanins, proanthocyanidins, flavonols and catechins. These secondary metabolites in plants are proved to act protective components for human health effect. Plant hormone ethylene is considered to have an important role in regulation of plant development and signal transduction. This study evaluated the effect of ethylene signaling regulation in phenolic compounds in tea plants...
April 3, 2018: Botanical Studies (Taipei, Taiwan)
Piotr Rozpądek, Agnieszka M Domka, Michał Nosek, Rafał Ważny, Roman J Jędrzejczyk, Monika Wiciarz, Katarzyna Turnau
Over the last years the role of fungal endophytes in plant biology has been extensively studied. A number of species were shown to positively affect plant growth and fitness, thus attempts have been made to utilize these microorganisms in agriculture and phytoremediation. Plant-fungi symbiosis requires multiple metabolic adjustments of both of the interacting organisms. The mechanisms of these adaptations are mostly unknown, however, plant hormones seem to play a central role in this process. The plant hormone strigolactone (SL) was previously shown to activate hyphae branching of mycorrhizal fungi and to negatively affect pathogenic fungi growth...
2018: Frontiers in Microbiology
Hironori Fujita, Masayoshi Kawaguchi
Phyllotaxis, the arrangement of leaves on a plant stem, is well known because of its beautiful geometric configuration, which is derived from the constant spacing between leaf primordia. This phyllotaxis is established by mutual interaction between a diffusible plant hormone auxin and its efflux carrier PIN1, which cooperatively generate a regular pattern of auxin maxima, small regions with high auxin concentrations, leading to leaf primordia. However, the molecular mechanism of the regular pattern of auxin maxima is still largely unknown...
April 2018: PLoS Computational Biology
Tereza Tichá, Lenka Luhová, Marek Petřivalský
S-nitrosation, the attachment of a nitroso group to cysteine thiols, has been recognized as an important posttranslational modification of proteins by nitric oxide and related reactive nitrogen species. Mechanisms and significance of S-nitrosation in the regulation of the structure and activity of proteins have been extensively studied in animal and plant systems. In plants, protein S-nitrosation is involved in signaling pathways of plant hormones and regulators during plant growth and development and in responses to abiotic and biotic stress stimuli...
2018: Methods in Molecular Biology
Izabela Wawer, Anna Golisz, Aleksandra Sulkowska, Dorota Kawa, Anna Kulik, Joanna Kufel
Defects in RNA processing and degradation pathways often lead to developmental abnormalities, impaired hormonal signaling and altered resistance to abiotic and biotic stress. Here we report that components of the 5'-3' mRNA decay pathway, DCP5, LSM1-7 and XRN4, contribute to a proper response to a key plant hormone abscisc acid (ABA), albeit in a different manner. Plants lacking DCP5 are more sensitive to ABA during germination, whereas lsm1a lsm1b and xrn4-5 mutants are affected at the early stages of vegetative growth...
2018: Frontiers in Plant Science
Lorenzo Camoni, Sabina Visconti, Patrizia Aducci, Mauro Marra
In this review we highlight the advances achieved in the investigation of the role of 14-3-3 proteins in hormone signaling, biosynthesis, and transport. 14-3-3 proteins are a family of conserved molecules that target a number of protein clients through their ability to recognize well-defined phosphorylated motifs. As a result, they regulate several cellular processes, ranging from metabolism to transport, growth, development, and stress response. High-throughput proteomic data and two-hybrid screen demonstrate that 14-3-3 proteins physically interact with many protein clients involved in the biosynthesis or signaling pathways of the main plant hormones, while increasing functional evidence indicates that 14-3-3-target interactions play pivotal regulatory roles...
2018: Frontiers in Plant Science
Andrea Chini, Alessio Cimmino, Marco Masi, Pierluigi Reveglia, Paola Nocera, Roberto Solano, Antonio Evidente
Jasmonates are signaling compounds that regulate plant responses to stress. Jasmonic acid (JA) is the direct precursor of the bioactive plant hormone JA-Ile, the ligand of the COI1-JAZ co-receptor complex. JA, its methyl ester and three furanonyl esters were recently isolated from the grapevine pathogen Lasiodiplodia mediterannea sp. The JA ester lasiojasmonate A (LasA) is the first reported naturally occurring JA-furanone, whose mode of action is currently unexplored. Here we show that LasA activates many JA-regulated responses in planta, including protein degradation, gene expression, and physiological processes...
March 24, 2018: Journal of Experimental Botany
Tianyuan Yang, Xiao-San Huang
Pyrus ussuriensis is extremely cold hardy when fully acclimated, but knowledge relevant to the molecular mechanisms underlying this economically valuable trait is still limited so far. In this study, global transcriptome profiles of Pyrus ussuriensis under cold conditions (4 °C) over a time course were generated by high-throughput sequencing. In total, >57,121,199 high quality clean reads were obtained with approximately 11.0 M raw data for each library. Among them, the values of 66.84%-72.03% of clean reads in the digital transcript abundance measurement could be well mapped to the pear genome database, resulting in the identification of 8544 differentially expressed genes (DEGs) having 43 Gene Ontology (GO) terms and 17 clusters of orthologous groups (COG) involved in 385 Kyoto Encyclopedia of Genes and Genomes (KEGG) defined pathways...
March 23, 2018: Gene
Huan Liu, Chi Zhang, Jun Yang, Nan Yu, Ertao Wang
Leguminous plants can establish symbiotic associations with diazotropic rhizobia to form nitrogen-fixating nodules, which are classified as determinate or indeterminate based on the persistence of nodule meristem. The formation of nitrogen-fixing nodules requires coordinating rhizobial infection and root nodule organogenesis. The formation of infection thread and the extent of nodule formation are largely under plant control but vary with environmental conditions and the physiological state of the host plants...
March 26, 2018: Journal of Integrative Plant Biology
Chao Wei, Lixia Zhu, Jing Wen, Bin Yi, Chaozhi Ma, Jinxing Tu, Jinxiong Shen, Tingdong Fu
Plant height is a key trait of plant architecture, and is responsible for both yield and lodging resistance in Brassica napus. A dwarf mutant line (bnaC.dwf) was obtained by chemical mutagenesis of an inbred line T6. However, the molecular mechanisms and changed biological processes of the dwarf mutant remain to be determined. In this study, a comparative transcriptome analysis between bnaC.dwf and T6 plants was performed to identify genome-wide differentially expressed genes (DEGs) and possible biological processes that may explain the phenotype variations in bnaC...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
Woonhee Baek, Chae Woo Lim, Sung Chul Lee
Abscisic acid (ABA) is major plant hormone involved in regulating abiotic stress responses. Several studies have established that an ABA-signaling transduction pathway-from ABA perception to response-functions in plant cells. The group A PP2Cs constitute core components of ABA signaling, and they negatively regulate ABA signaling and stress responses. Recent studies have identified and functionally analyzed regulators of PP2C activity; however, the precise regulatory mechanisms remain unclear. In the present study, we used a yeast two-hybrid (Y2H) screening analysis to identify the DEAD-box RNA helicase RH8, which interacted with PP2CA in the nucleus...
March 25, 2018: Plant, Cell & Environment
Mateusz Majda, Stéphanie Robert
Plant cells are surrounded by cell walls, which are dynamic structures displaying a strictly regulated balance between rigidity and flexibility. Walls are fairly rigid to provide support and protection, but also extensible, to allow cell growth, which is triggered by a high intracellular turgor pressure. Wall properties regulate the differential growth of the cell, resulting in a diversity of cell sizes and shapes. The plant hormone auxin is well known to stimulate cell elongation via increasing wall extensibility...
March 22, 2018: International Journal of Molecular Sciences
Qi Zhao, Rui Li, Yang Zhang, Kejia Huang, Wenguo Wang, Jian Li
The bulbs of Fritillaria cirrhosa is wildly used in traditional Chinese medicine to treat lung-related disease, which has recently been found to have antitussive, anti-inflammatory, antihypertensive and anti-tumor activity. Steroidal alkaloids are the major effective ingredients of F. cirrhosa . In the current study, we demonstrated an efficient strategy for F. cirrhosa bulb regeneration in vitro by cytokinin/auxin induction. Our data showed that the regenerated bulbs accumulated higher alkaloid content that the wild ones...
April 2018: 3 Biotech
Mohammadhossein Ravanbakhsh, Rashmi Sasidharan, Laurentius A C J Voesenek, George A Kowalchuk, Alexandre Jousset
The plant hormone ethylene is one of the central regulators of plant development and stress resistance. Optimal ethylene signaling is essential for plant fitness and is under strong selection pressure. Plants upregulate ethylene production in response to stress, and this hormone triggers defense mechanisms. Due to the pleiotropic effects of ethylene, adjusting stress responses to maximize resistance, while minimizing costs, is a central determinant of plant fitness. Ethylene signaling is influenced by the plant-associated microbiome...
March 21, 2018: Microbiome
Sukhmeen Kaur Kohli, Neha Handa, Anket Sharma, Vandana Gautam, Saroj Arora, Renu Bhardwaj, Leonard Wijaya, Mohammed Nasser Alyemeni, Parvaiz Ahmad
Lead (Pb) is considered one the most hazardous pollutant, and its accumulation in soil and plants is of prime concern. To understand the role of plant hormones in combating heavy metal stress, the present study was planned to assess the interactive effects of 24-epibrassinolide (EBL) (10-7  M) and salicylic acid (SA) (1 mM) in regulating growth, pigment contents, antioxidative defense response, and gene expression in Brassica juncea L. seedlings exposed to different concentrations of Pb metal (0.25, 0.50, and 0...
March 20, 2018: Environmental Science and Pollution Research International
Thomas Spallek, Pamela Gan, Yasuhiro Kadota, Ken Shirasu
Virulence factors are molecules that enable plant pathogens to infect and colonize host tissues successfully. These molecules co-evolve with host genes to ensure functionality and to avoid recognition by the host immune system. Some pathogens also produce the plant growth hormone cytokinin (CK) and other plant hormones that contribute to virulence without being subjected to the molecular arms race. Here, we summarize recent findings regarding the role of CKs during infection and the establishment of plant diseases...
March 16, 2018: Current Opinion in Plant Biology
Elena Sanchez, Emma Artuso, Chiara Lombardi, Ivan Visentin, Beatrice Lace, Wajeeha Saeed, Marco L Lolli, Piermichele Kobauri, Zahid Ali, Francesca Spyrakis, Pilar Cubas, Francesca Cardinale, Cristina Prandi
Strigolactones (SLs) are plant hormones with various functions in development, responses to stress and interaction with (micro)organisms in the rhizosphere, including seeds of parasitic plants. Their perception for hormonal functions requires an α,β-hydrolase belonging to the D14 clade in higher plants; perception of host-produced SLs in parasitic seeds relies on similar but phylogenetically distinct proteins (D14-like). D14 and D14-like proteins are peculiar receptors, because they cleave SLs before undergoing a conformational change that elicits downstream events...
March 15, 2018: Journal of Experimental Botany
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