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"plant hormone"

Martijn Fiers, Jorin Hoogenboom, Alice Brunazzi, Tom Wennekes, Gerco C Angenent, Richard G H Immink
BACKGROUND: Floral timing is a carefully regulated process, in which the plant determines the optimal moment to switch from the vegetative to reproductive phase. While there are numerous genes known that control flowering time, little information is available on chemical compounds that are able to influence this process. We aimed to discover novel compounds that are able to induce flowering in the model plant Arabidopsis. For this purpose we developed a plant-based screening platform that can be used in a chemical genomics study...
2017: Plant Methods
Xiangxiang Meng, Qiling Song, Jiabao Ye, Lanlan Wang, Feng Xu
3-Hydroxy-3-methylglutaryl-CoA synthase (HMGS) is one of the rate-limiting enzymes in the mevalonate pathway as it catalyzes the condensation of acetoacetyl-CoA to form 3-hydroxy-3-methylglutaryl-CoA. In this study, A HMGS gene (designated as GbHMGS1) was cloned from Ginkgo biloba for the first time. GbHMGS1 contained a 1422-bp open-reading frame encoding 474 amino acids. Comparative and bioinformatics analysis revealed that GbHMGS1 was extensively homologous to HMGSs from other plant species. Phylogenetic analysis indicated that the GbHMGS1 belonged to the plant HMGS superfamily, sharing a common evolutionary ancestor with other HMGSs, and had a further relationship with other gymnosperm species...
October 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Ni Ma, Chao Hu, Lin Wan, Qiong Hu, Junlan Xiong, Chunlei Zhang
Rapeseed (Brassica napus L.) is a very important edible oil crop in the world, and the production is inhibited by abiotic stresses, such as salinity. Plant hormones can alleviate the stress by regulating the physiological processes and gene expression. To study the plant responses to salinity in combination with GR24, a synthesized strigolactone, the oilseed rape variety (Zhongshuang 11) replications were grown in the pots in a controlled growth chamber under three levels of salinity (0, 100, and 200 mM NaCl) and 0...
2017: Frontiers in Plant Science
Shiri Goldental-Cohen, Alon Israeli, Naomi Ori, Hagai Yasuor
The plant hormone auxin is a major regulator of plant development and response to environmental cues. Auxin plays a particularly central role in flower development, but the knowledge of its role of flower development in crop plants with fleshy fruits, such as tomato, is still scarce. Mutations in the Aux/IAA gene ENTIRE/Indole Acetic Acid 9 (E/IAA9) lead to the precocious development of young gynoecia into parthenocarpic fruits. Here, we compared the distribution of the auxin response sensor DR5::VENUS and the auxin efflux transporter PIN1 between the wild type and entire during successive stages of flower and fruit development...
July 31, 2017: Plant & Cell Physiology
Yao Chen, Qiaofeng Yang, Sihong Sang, Zhaoyun Wei, Peng Wang
The plant hormone auxin controls many aspects of plant growth and development by promoting the degradation of Auxin/Indole-3-acetic acid (Aux/IAA) proteins. The domain II (DII) of Aux/IAA proteins is sufficient for eliciting the degradation by direct interacting with the auxin receptor F-box protein TIR1 to form a TIR1/AFBs-Aux/IAA complex in an auxin-dependent manner. However, the underlying mechanism of fine-tuning Aux/IAA degradation by auxin stimuli has remained to be elucidated. Here, we show that OsIPK2, a rice (Oryza sativa) inositol polyphosphate kinase, directly interacts with an Aux/IAA protein OsIAA11 to repress its degradation...
August 30, 2017: Plant & Cell Physiology
Navina Drechsler, Pierre-Emmanuel Courty, Daphnée Brulé, Reinhard Kunze
Arbuscular mycorrhizal fungi (AMF) colonize up to 90% of all land plants and facilitate the acquisition of mineral nutrients by their hosts. Inorganic orthophosphate (Pi) and nitrogen (N) are the major nutrients transferred from the fungi to plants. While plant Pi transporters involved in nutrient transfer at the plant-fungal interface have been well studied, the plant N transporters participating in this process are largely unknown except for some ammonium transporters (AMT) specifically assigned to arbuscule-colonized cortical cells...
October 9, 2017: Mycorrhiza
Songling Bai, Pham Anh Tuan, Takanori Saito, Akiko Ito, Benjamin Ewa Ubi, Yusuke Ban, Takaya Moriguchi
Floral induction is an important event in the annual growth cycle of perennial fruit trees. For pear, this event directly affects fruit production in the following year. The flower buds in many species are induced by FLOWERING LOCUS T (FT), whose effect is repressed by the meristem-expressed gene TERMINAL FLOWER1 (TFL1). In this study, we investigated the functions of pear FT and TFL1 genes during floral development. Expression of pear FTs (PpFT1a and PpFT2a) in reproductive meristems was not obviously induced prior to floral initiation, while expression of TFL1s (PpTFL1-1a and PpTFL1-2a) rapidly decreased...
September 7, 2017: Journal of Experimental Botany
Elizabeth M Frick, Lucia C Strader
The plant hormone auxin is a central regulator of plant growth and development. Because auxin plays critical roles in cell division and cell expansion, plants use a number of cellular mechanisms to regulate auxin levels and response. Among these mechanisms is regulated input from the auxin precursor indole-3-butyric acid (IBA) toward the pool of active auxin [indole-3-acetic acid (IAA)]. In this review, we cover the mechanisms of IBA transport and conversion, and discuss specific roles for IBA-derived auxin in driving certain developmental events...
August 23, 2017: Journal of Experimental Botany
Wentao Wu, Yaxue Liu, Yuqian Wang, Huimin Li, Jiaxi Liu, Jiaxin Tan, Jiadai He, Jingwen Bai, Haoli Ma
The plant hormone auxin plays pivotal roles in many aspects of plant growth and development. The auxin/indole-3-acetic acid (Aux/IAA) gene family encodes short-lived nuclear proteins acting on auxin perception and signaling, but the evolutionary history of this gene family remains to be elucidated. In this study, the Aux/IAA gene family in 17 plant species covering all major lineages of plants is identified and analyzed by using multiple bioinformatics methods. A total of 434 Aux/IAA genes was found among these plant species, and the gene copy number ranges from three (Physcomitrella patens) to 63 (Glycine max)...
October 8, 2017: International Journal of Molecular Sciences
Aixin Li, Mingqi Zhou, Donghui Wei, Hu Chen, Chenjiang You, Juan Lin
C-repeat binding factors (CBF) are a subfamily of AP2 transcription factors that play critical roles in the regulation of plant cold tolerance and growth in low temperature. In the present work, we sought to perform a detailed investigation into global transcriptional regulation of plant hormone signaling associated genes in transgenic plants engineered with CBF genes. RNA samples from Arabidopsis thaliana plants overexpressing two CBF genes, CBF2 and CBF3, were subjected to Illumina HiSeq 2000 RNA sequencing (RNA-Seq)...
2017: Frontiers in Plant Science
Chunpeng An, Lin Li, Qingzhe Zhai, Yanrong You, Lei Deng, Fangming Wu, Rong Chen, Hongling Jiang, Hang Wang, Qian Chen, Chuanyou Li
Jasmonoyl-isoleucine (JA-Ile), the active form of the plant hormone jasmonate (JA), is sensed by the F-box protein CORONATINE INSENSITIVE 1 (COI1), a component of a functional Skp-Cullin-F-box E3 ubiquitin ligase complex. Sensing of JA-Ile by COI1 rapidly triggers genome-wide transcriptional changes that are largely regulated by the basic helix-loop-helix transcription factor MYC2. However, it remains unclear how the JA-Ile receptor protein COI1 relays hormone-specific regulatory signals to the RNA polymerase II general transcriptional machinery...
October 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
Annalisa Rizza, Ankit Walia, Viviane Lanquar, Wolf B Frommer, Alexander M Jones
The phytohormone gibberellin (GA) is a key regulator of plant growth and development. Although the upstream regulation and downstream responses to GA vary across cells and tissues, developmental stages and environmental conditions, the spatiotemporal distribution of GA in vivo remains unclear. Using a combinatorial screen in yeast, we engineered an optogenetic biosensor, GIBBERELLIN PERCEPTION SENSOR 1 (GPS1), that senses nanomolar levels of bioactive GAs. Arabidopsis thaliana plants expressing a nuclear localized GPS1 report on GAs at the cellular level...
October 2, 2017: Nature Plants
Anjaritha A R Parijadi, Sastia P Putri, Sobir Ridwani, Fenny M Dwivany, Eiichiro Fukusaki
Metabolomics is an emerging research field based on exhaustive metabolite profiling that have been proven useful to facilitate the study of postharvest fruit development and ripening. Specifically, tracking changes to the metabolome as fruit ripens should provide important clues for understanding ripening mechanisms and identify bio-markers to improve post-harvest technology of fruits. This study conducted a time-course metabolome analysis in mangosteen, an economically important tropical fruit valued for its flavor...
September 29, 2017: Journal of Bioscience and Bioengineering
Yang Zhao, Jinghui Gao, Jeong Im Kim, Kong Chen, Ray A Bressan, Jian-Kang Zhu
Drought stress is a condition that in specific climate contexts results in insufficient water availability and often limits plant productivity through perturbing development and reducing plant growth and survival. Plants use senescence of old leaves and dormancy of buds and seeds to survive extreme environmental conditions. The plant hormone ABA accumulates after drought stress, and increases plant survival by inducing quick responses such as stomatal closure, and long-term responses such as extended growth inhibition, osmotic regulation, accumulation of cuticular wax, senescence, abscission and dormancy...
August 1, 2017: Plant & Cell Physiology
Santisree Parankusam, Srivani S Adimulam, Pooja Bhatnagar-Mathur, Kiran K Sharma
High temperature is one of the biggest abiotic stress challenges for agriculture. While, Nitric oxide (NO) is gaining increasing attention from plant science community due to its involvement in resistance to various plant stress conditions, its implications on heat stress tolerance is still unclear. Several lines of evidence indicate NO as a key signaling molecule in mediating various plant responses such as photosynthesis, oxidative defense, osmolyte accumulation, gene expression, and protein modifications under heat stress...
2017: Frontiers in Plant Science
Shun Wang, Wei Li, Keke Chang, Juan Liu, Qingqian Guo, Haifeng Sun, Min Jiang, Hao Zhang, Jing Chen, Jiandong Hu
Abscisic acid (ABA) plays an important role in abiotic stress response and physiological signal transduction resisting to the adverse environment. Therefore, it is very essential for the quantitative detection of abscisic acid (ABA) due to its indispensable role in plant physiological activities. Herein, a new detection method based on localized surface plasmon resonance (LSPR) using aptamer-functionalized gold nanoparticles (AuNPs) is developed without using expensive instrument and antibody. In the presence of ABA, ABA specifically bind with their aptamers to form the ABA-aptamer complexes with G-quadruplex-like structure and lose the ability to stabilize AuNPs against NaCl-induced aggregation...
2017: PloS One
Yanjun Zhang, Xiangqiang Kong, Jianlong Dai, Zhen Luo, Zhenhuai Li, Hequan Lu, Shizhen Xu, Wei Tang, Dongmei Zhang, Weijiang Li, Chengsong Xin, Hezhong Dong
Cotton is sensitive to waterlogging stress, which usually results in stunted growth and yield loss. To date, the molecular mechanisms underlying the responses to waterlogging in cotton remain elusive. Cotton was grown in a rain-shelter and subjected to 0 (control)-, 10-, 15- and 20-d waterlogging at flowering stage. The fourth-leaves on the main-stem from the top were sampled and immediately frozen in liquid nitrogen for physiological measurement. Global gene transcription in the leaves of 15-d waterlogged plants was analyzed by RNA-Seq...
2017: PloS One
Aditya S Vaidya, Francis C Peterson, Dmitry Yarmolinsky, Ebe Merilo, Inge Verstraeten, Sang-Youl Park, Dezi Elzinga, Amita Kaundal, Jonathan Helander, Jorge Lozano-Juste, Masato Otani, Kevin Wu, Davin R Jensen, Hannes Kollist, Brian F Volkman, Sean R Cutler
Increasing drought and diminishing freshwater supplies have stimulated interest in developing chemicals that can be used to control transpiration. Receptors for the plant hormone abscisic acid (ABA) have emerged as key targets for this application, because ABA controls the apertures of stomata, which in turn regulate transpiration. Here we describe the rational design of cyanabactin, an ABA receptor agonist that preferentially activates Pyrabactin resistance 1 (PYR1) with low nM potency. A 1.63 Å X-ray crystallographic structure of cyanabactin in complex with PYR1 illustrates that cyanabactin's arylnitrile mimics ABA's cyclohexenone oxygen and engages the tryptophan lock, a key component required to stabilize activated receptors...
September 26, 2017: ACS Chemical Biology
Ming Li, Zhaoxu Liang, Shanshan He, Yuan Zeng, Yan Jing, Weikuan Fang, Kaichao Wu, Guanyu Wang, Xia Ning, Lunwang Wang, Song Li, Hongwei Tan, Fang Tan
BACKGROUND: Sugarcane (Saccharum officinarum L.) is an economically important crop, mainly due to the production of sugar and biofuel (Azevedo RA, Carvalho RF, Cia MC, & Gratão PL, Trop Plant Biol 4:42-51, 2011). Grown mainly in tropical and subtropical countries, sugarcane is a highly polyploid plant with up to ten copies of each chromosome, which increases the difficulties of genome assembly and genetic, physiologic and biochemical analyses. The increasing demands of sugar and the increasing cost of sugarcane harvest require sugarcane varieties which can shed their leaves during the maturity time, so it is important to study the mechanism of leaf abscission in sugarcane...
September 25, 2017: BMC Genomics
José Alfredo Curá, Diego Reinaldo Franz, Julián Ezequiel Filosofía, Karina Beatríz Balestrasse, Lautaro Exequiel Burgueño
Stress drought is an important abiotic factor that leads to immense losses in crop yields around the world. Strategies are urgently needed to help plants adapt to drought in order to mitigate crop losses. Here we investigated the bioprotective effects of inoculating corn grown under drought conditions with two types of plant growth-promoting rhizobacteria (PGPR), A. brasilense, strain SP-7, and H. seropedicae, strain Z-152. Plants inoculated with the bacteria were grown in a greenhouse with perlite as a substrate...
July 26, 2017: Microorganisms
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