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Plant hormone abscisic acid,ABA ELISA Kit, Species Plant, Sample Type serum, plasma

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[#CSB-E09159Pl] Plant hormone abscisic acid,ABA ELISA Kit, Species Plant, Sample Type serum, plasma

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CSB-E09159Pl | Plant hormone abscisic acid,ABA ELISA Kit, Species Plant, Sample Type serum, plasma, 96T
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(1) Wheat TaMs1 is a glycosylphosphatidylinositol-anchored lipid transfer protein necessary for pollen development.[TOP]

Pubmed ID :30518316
Publication Date : //
In flowering plants, lipid biosynthesis and transport within anthers is essential for male reproductive success. TaMs1, a dominant wheat fertility gene located on chromosome 4BS, has been previously fine mapped and identified to encode a glycosylphosphatidylinositol (GPI)-anchored non-specific lipid transfer protein (nsLTP). Although this gene is critical for pollen exine development, details of its function remains poorly understood.

Authors : Kouidri Allan, Baumann Ute, Okada Takashi, Baes Mathieu, Tucker Elise J, Whitford Ryan,



(2) PYL8 mediates ABA perception in the root through non-cell-autonomous and ligand-stabilization-based mechanisms.[TOP]

Pubmed ID :30482863
Publication Date : //
The phytohormone abscisic acid (ABA) plays a key role regulating root growth, root system architecture, and root adaptive responses, such as hydrotropism. The molecular and cellular mechanisms that regulate the action of core ABA signaling components in roots are not fully understood. ABA is perceived through receptors from the PYR/PYL/RCAR family and PP2C coreceptors. PYL8/RCAR3 plays a nonredundant role in regulating primary and lateral root growth. Here we demonstrate that ABA specifically stabilizes PYL8 compared with other ABA receptors and induces accumulation of PYL8 in root nuclei. This requires ABA perception by PYL8 and leads to diminished ubiquitination of PYL8 in roots. The ABA agonist quinabactin, which promotes root ABA signaling through dimeric receptors, fails to stabilize the monomeric receptor PYL8. Moreover, a PYL8 mutant unable to bind ABA and inhibit PP2C is not stabilized by the ligand, whereas a PYL8 mutant is more stable than PYL8 at endogenous ABA concentrations. The PYL8 transcript was detected in the epidermis and stele of the root meristem; however, the PYL8 protein was also detected in adjacent tissues. Expression of PYL8 driven by tissue-specific promoters revealed movement to adjacent tissues. Hence both inter- and intracellular trafficking of PYL8 appears to occur in the root apical meristem. Our findings reveal a non-cell-autonomous mechanism for hormone receptors and help explain the nonredundant role of PYL8-mediated root ABA signaling.

Authors : Belda-Palazon Borja, Gonzalez-Garcia Mary-Paz, Lozano-Juste Jorge, Coego Alberto, Antoni Regina, Julian Jose, Peirats-Llobet Marta, Rodriguez Lesia, Berbel Ana, Dietrich Daniela, Fernandez Maria A, Madueño Francisco, Bennett Malcolm J, Rodriguez Pedro L,



(3) Physiological Analysis and Transcriptome Profiling of Inverted Cuttings of Populus yunnanensis Reveal That Cell Wall Metabolism Plays a Crucial Role in Responding to Inversion.[TOP]

Pubmed ID :30477186
Publication Date : //
Inverted cuttings of remain alive by rooting from the original morphological apex and sprouting from the base, but the lateral branches exhibit less vigorous growth than those of the upright plant. In this study, we examined the changes in hormone contents, oxidase activities, and transcriptome profiles between upright and inverted cuttings of . The results showed that the indole-3-acetic acid (IAA) and gibberellic acid (GA₃) contents were significantly lower in inverted cuttings than in upright cuttings only in the late growth period (September and October), while the abscisic acid (ABA) level was always similar between the two direction types. The biosynthesis of these hormones was surprisingly unrelated to the inversion of P. yunnanensis during the vegetative growth stage (July and August). Increased levels of peroxidases (PODs) encoded by 13 differentially expressed genes (DEGs) served as lignification promoters that protected plants against oxidative stress. Kyoto encyclopedia of genes and genomes (KEGG) enrichment analysis showed that most DEGs (107) were related to carbohydrate metabolism. Furthermore, altered activities of uridine diphosphate (UDP)-sugar pyrophosphorylase (USP, 15 DEGs) for nucleotide sugars, pectin methylesterase (PME, 7 DEGs) for pectin, and POD (13 DEGs) for lignin were important factors in the response of the trees to inversion, and these enzymes are all involved cell wall metabolism.

Authors : Zhou An-Pei, Zong Dan, Gan Pei-Hua, Zou Xin-Lian, Fei Xuan, Zhong Yuan-Yuan, He Cheng-Zhong,



(4) Molecular Mechanism for the Regulation of ABA Homeostasis During Plant Development and Stress Responses.[TOP]

Pubmed ID :30463231
Publication Date : //
The plant hormone abscisic acid (ABA) play essential roles in numerous physiological processes such as seed dormancy, seed germination, seeding growth and responses to biotic and abiotic stresses. Such biological processes are tightly controlled by a complicated regulatory network including ABA homoeostasis, signal transduction as well as cross-talking among other signaling pathways. It is known that ABA homoeostasis modulated by its production, inactivation, and transport pathways is considered to be of great importance for plant development and stress responses. Most of the enzymes and transporters involved in ABA homoeostasis have been largely characterized and they all work synergistically to maintain ABA level in plants. Increasing evidence have suggested that transcriptional regulation of the genes involved in either ABA production or ABA inactivation plays vital roles in ABA homoeostasis. In addition to transcription factors, such progress is also regulated by microRNAs and newly characterized root to shoot mobile peptide-receptor like kinase (RLKs) mediated long-distance signal transduction. Thus, ABA contents are always kept in a dynamic balance. In this review, we survey recent research on ABA production, inactivation and transport pathways, and summarize some latest findings about the mechanisms that regulate ABA homoeostasis.

Authors : Ma Yanlin, Cao Jing, He Jiahan, Chen Qiaoqiao, Li Xufeng, Yang Yi,



(5) TIP41 network analysis and mutant phenotypes predict interactions between the TOR and ABA pathways.[TOP]

Pubmed ID :30458658
Publication Date : //
Environmental conditions inform the rate of plant growth and development. The target of rapamycin (TOR) signalling pathway is a central regulator of plant growth in response to nutrients and energy, while abscisic acid (ABA) is a main mediator of abiotic stress responses. We recently characterized Arabidopsis TIP41, a predicted TOR pathway component involved in the ABA-mediated response to abiotic stress. Here, we report the ABA sensitivity of tip41 mutants, supporting the relation between TIP41 and the hormone pathway. The analysis of predicted TIP41 functional network identified several protein phosphatases. In particular, candidate protein interactors included catalytic subunits of type 2A protein phosphatases and protein phosphatases 6, which regulate different developmental processes and responses to environmental stimuli. These results provide important information on the role of TIP41 in the cross talk between TOR and ABA pathways.

Authors : Punzo Paola, Ruggiero Alessandra, Grillo Stefania, Batelli Giorgia,



(6) Interlinked regulatory loops of ABA catabolism and biosynthesis coordinate fruit growth and ripening in woodland strawberry.[TOP]

Pubmed ID :30455308
Publication Date : //
Fruit growth and ripening are controlled by multiple phytohormones. How these hormones coordinate and interact with each other to control these processes at the molecular level is unclear. We found in the early stages of (woodland strawberry) fruit development, auxin increases both widths and lengths of fruits, while gibberellin [gibberellic acid (GA)] mainly promotes their longitudinal elongation. Auxin promoted GA biosynthesis and signaling by activating GA biosynthetic and signaling genes, suggesting auxin function is partially dependent on GA function. To prevent the repressive effect of abscisic acid (ABA) on fruit growth, auxin and GA suppressed ABA accumulation during early fruit development by activating the expression of encoding cytochrome P450 monooxygenase that catalyzes ABA catabolism. At the onset of fruit ripening, both auxin and GA levels decreased, leading to a steep increase in the endogenous level of ABA that drives fruit ripening. ABA repressed the expression of but promoted that of , a rate-limiting step in ABA biosynthesis. Accordingly, altering expression changed the endogenous ABA levels and affected expression. Hence, ABA catabolism and biosynthesis are tightly linked by feedback and feedforward loops to limit ABA contents for fruit growth and to quickly increase ABA contents for the onset of fruit ripening. These results indicate that not only regulates ABA accumulation but also provides a hub to coordinate fruit size and ripening times by relaying auxin, GA, and ABA signals.

Authors : Liao Xiong, Li Mengsi, Liu Bin, Yan Miaoling, Yu Xiaomin, Zi Hailing, Liu Renyi, Yamamuro Chizuko,



(7) Abscisic acid (ABA) and low temperatures synergistically increase the expression of CBF/DREB1 transcription factors and cold-hardiness in grapevine dormant buds.[TOP]

Pubmed ID :30418484
Publication Date : //
It has been reported that low temperatures (LTs) and the plant hormone abscisic acid (ABA) induce the expression of CBF/DREB1 transcription factors in vegetative tissues and seedlings of Vitis vinifera and Vitis riparia and that foliar applications of ABA to V. vinifera increase the freezing tolerance or cold-hardiness of dormant buds. However, the combined effect of ABA and LTs on the expression of CBF/DREB1 transcription factors and on the acquisition of freezing tolerance in dormant grapevine buds has not been investigated. The objective of this study was to analyse the combined effect of ABA and LT treatments on the expression of CBF/DREB transcription factors and the acquisition of freezing tolerance.

Authors : Rubio Sebastián, Noriega Ximena, Pérez Francisco J,



(8) An Evolutionarily Conserved Abscisic Acid Signaling Pathway Regulates Dormancy in the Liverwort Marchantia polymorpha.[TOP]

Pubmed ID :30416060
Publication Date : //
Dormancy is a key process allowing land plants to adapt to changing conditions in the terrestrial habitat, allowing the cessation of growth in response to environmental or physiological cues, entrance into a temporary quiescent state, and subsequent reactivation of growth in more favorable environmental conditions [1-3]. Dormancy may be induced seasonally, sporadically (e.g., in response to drought), or developmentally (e.g., seeds and apical dominance). Asexual propagules, known as gemmae, derived via clonal reproduction in bryophytes, are often dormant until displaced from the parent plant. In the liverwort Marchantia polymorpha, gemmae are produced within specialized receptacles, gemma cups, located on the dorsal side of the vegetative thallus [4]. Mature gemmae are detached from the parent plant but may remain in the cup, with gemma growth suppressed as long as the gemmae remain in the gemma cup and the parental plant is alive [5]. Following dispersal of gemmae from gemma cups by rain, the gemmae germinate in the presence of light and moisture, producing clonal offspring [6]. In land plants, the plant hormone abscisic acid (ABA) regulates many aspects of dormancy and water balance [7]. Here, we demonstrate that ABA plays a central role in the control of gemma dormancy as transgenic M. polymorpha gemmae with reduced sensitivity to ABA fail to establish and/or maintain dormancy. Thus, the common ancestor of land plants used the ABA signaling module to regulate germination of progeny in response to environmental cues, with both gemmae and seeds being derived structures co-opting an ancestral response system.

Authors : Eklund D Magnus, Kanei Masakazu, Flores-Sandoval Eduardo, Ishizaki Kimitsune, Nishihama Ryuichi, Kohchi Takayuki, Lagercrantz Ulf, Bhalerao Rishikesh P, Sakata Yoichi, Bowman John L,



(9) MaMADS2 repression in banana fruits modifies hormone synthesis and signalling pathways prior to climacteric stage.[TOP]

Pubmed ID :30400866
Publication Date : //
While the role of ethylene in fruit ripening has been widely studied, the contributions of additional plant hormones are less clear. Here we examined the interactions between the transcription factor MaMADS2-box which plays a major role in banana fruit ripening and hormonal regulation. Specifically, we used MaMADS2 repressed lines in transcriptome and hormonal analyses throughout ripening and assessed hormone and gene expression perturbations as compared to wild-type (WT) control fruit.

Authors : Yakir Esther, Zhangjun Fei, Sela Noa, Xu Yimin, Singh Vikram, Dagar Anurag, Joshi Janak Raj, Müller Maren, Munné-Bosch Sergi, Giovannoni James J, Vrebalov Julia, Friedman Haya,



(10) Combining QTL mapping with transcriptome and metabolome profiling reveals a possible role for ABA signaling in resistance against the cabbage whitefly in cabbage.[TOP]

Pubmed ID :30399182
Publication Date : //
Whiteflies are among the world's most significant agricultural pests and chemical insecticides are extensively used to reduce crop damage to acceptable levels. However, nearly all insecticides pose a threat to the environment and alternative control methods, such as breeding of crop varieties that are inherently insect-resistant, are needed. Previously, a strong source of plant-age dependent resistance to the cabbage whitefly (Aleyrodes proletella) has been identified in the modern white cabbage (Brassica oleracea var. capitata) variety Rivera. However, nothing is known about the molecular mechanisms or the genes involved in this resistance. In the present study, a multidisciplinary approach combining transcriptome and metabolome profiling with genetic mapping was used to identify the molecular players of whitefly resistance in cabbage. Transcriptome profiles of young (susceptible) and older (resistant) Rivera plants were analyzed using RNA sequencing. While many genes involved in general processes were differentially expressed between both ages, several defense-related processes were overrepresented in the transcriptome profile of older plants. Hormone measurements revealed that jasmonic acid (JA) levels decreased upon whitefly infestation at both plant ages. Interestingly, abscisic acid (ABA) levels showed contrasting effects in response to whitefly infestation: ABA levels were reduced in young plants but induced in older plants upon whitefly feeding. Auxin levels were significantly lower in older plants compared with young plants, independent of whitefly presence, while glucosinolate levels were higher. Additionally, whitefly performance was monitored in an F2 population derived from a cross between Rivera and the susceptible white cabbage variety Christmas Drumhead. Significant QTL intervals were mapped on chromosome 2 and 9 for oviposition rate and whitefly adult survival, respectively. Several genes that were higher expressed in older plants and located in the identified QTL intervals were orthologous to Arabidopsis genes that have been related to ABA signaling, suggesting a role for ABA in the regulation of resistance towards whiteflies. Our results show that combining different omics approaches is a useful strategy to identify candidate genes underlying insect resistance.

Authors : Broekgaarden Colette, Pelgrom Koen T B, Bucher Johan, van Dam Nicole M, Grosser Katharine, Pieterse Corné M J, van Kaauwen Martijn, Steenhuis Greet, Voorrips Roeland E, de Vos Martin, Vosman Ben, Worrich Anja, van Wees Saskia C M,