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    Home > Food News > Food Articles > Li Jiayang's team revealed a new signal transduction mechanism for one-footed gold esters

    Li Jiayang's team revealed a new signal transduction mechanism for one-footed gold esters

    • Last Update: 2021-03-07
    • Source: Internet
    • Author: User
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    Plant hormone is a small molecular compound produced in the plant body, but the trace has a significant impact, affecting cell division, differentiation, elongation and plant germination rooting, plant high branching, flowering and strong and other aspects, play an important regulatory role in plant growth and development.
    , as the most recently identified important plant hormone in recent years, is closely related to crop strain type, yield and nutrient utilization.
    how to regulate the signal "communication" between plants and the outside environment, how to affect the growth and development of plants, etc., has always been a hot topic of concern to botanists.
    June 11, 2020, at 17:00 BST, Nature published a breakthrough in the research on the signal transduction mechanism of one-footed jinneester by Li Jiayang, a researcher at the China
    and China
    Institute of Genetics and Developmental Biology.
    team systematically identified the early response gene of athropophylactic monopods and clarified the molecular mechanisms and developmental processes involved, revealing a new plant hormone signal transduction mechanism.one-footed gold nectosteride is a new type of plant hormone, has been shown that the one-footed gold nectosteride molecules as early as 725-120 million years ago, accompanied by the plant from aquatic to land-based evolution of this important event, and gradually evolved a series of important biological functions.
    Single-footed gold esters play an important role in many plant growth and development processes and environmental adaptability, including regulating branching, plant height, lower embryo shaft elongation, leaf shape, anthocyanin glycoside accumulation, root form, and plant adaptability to environmental stress.
    One-footed gold endoesters secreted from plant roots into the soil, can promote the symblosis of plants and plexella root fungi, and thus help plant roots absorb water and nutrients, while the soil's one-footed gold endoesters can stimulate the germination of parasitic weed seeds, resulting in serious crop yield reduction.
    , the research on the signal pathway of one-footed gold esters has important scientific significance and application value.
    Li Jiayang's research group has long been engaged in the synthesis and signal transductivity of the new plant hormone monopods.
    recent years, the team has found that monopods can induce its subject D14 to form complexes with F-box protein D3/MAX2 and inhibitor protein D53/SMXL2, 6,7,8, initiate signal transducting, and induce D 53/SMXL2,6,7,8 Ubiganized modified-mediated protein degradation occurs, which relieves transcription inhibition of downstream genes and regulates the developmental processes such as the number of branches (branches), plant height, blade shape, lower embryo shaft elongation, etc.
    " identification of the early response gene of one-footed gold nesteride is the bottleneck in the study of hormone signal transducing, and only a small number of response genes have been identified, which is far from enough to explain the regulatory role of one-footed gold necid in many aspects of plant growth and development. Wang Bing, co-first author and co-author of the paper and an associate
    at the China Institute of Genetics and Developmental Biology, told China Science Daily.In order to break through the bottleneck in the study of single-footed gold-inner ester signal transduction, researchers recently synthesized four pairs of isomers of GR24, a synthetic analogo of one-footed gold-inner ester, and found that GR244DO was able to specifically activate ethyl-southern mustard-soled gold-inner esters in a way that relied on the one-footed gold necides. Signal transducting, the system identified 401 early response genes (about 90% of which are newly discovered one-footed gold-inner ester response genes), revealed that one-footed gold-inner ester may play a physiological role by regulating the cytoskeleton, and found that single-footed gold-encellent regulates plant drought resistance by inducing the expression of the drought-resistant key gene AFL1.
    study found that single-footed gold esters increase the expression of HB40 by activating the expression of BRC1, thereby increasing the content of shedding acid in side buds to inhibit branch development, by increasing the expression of TCP1 to promote leaf elongation, by activating PAP1, PA The expression of P2, MYB113 and MYB114, the expression of the synthetic genes DFR, ANS and TT7, promoted the accumulation of anthromosine, and revealed the transcription control network in the single-footed gold nesteride signaling path.figure 1: New mechanism for transduction of one-footed gold nesteride signaling
    In addition, studies have shown that inhibitors cannot directly bind to DNA in hormone signaling path paths that rely on ubiganic degradation systems, such as growth hormone, erythromycin, jasmine, and monopods, by binding transcription factors and inhibiting transcriptional activity of transcription factors to inhibit the expression of hormone-responding genes.
    team further discovered that the SMXL6 was able to bind directly to the STARTer of THESXL6, 7,8 and inhibit its transcription, the SMXL7 was able to combine directly with the initiators of the SMXL6, 7,8, and the SMXL8 was able to combine directly with the initiators of the SMXL7.Figure 2: The transcription suppression function of SMXL6 is essential for the regulation of branching and blade development of monopods
    THETACAA sequence of SMXL7 initiators is necessary for SMXL6 to bind to SMXL7 initiators and inhibit their transcription.
    Wang Bing explains that this shows that SMXL6,7,8 can act as a transcription factor to directly bind DNA and negatively regulate the transcription of its own genes, thus maintaining its own steady state and moderate response to the one-footed gold ester signal.
    this is a completely new plant hormone signaling mechanism, unlike the classical mechanism of inhibiting proteins in the growth, erythromycin, and jasmine pathrases that do not bind directly to DNA.
    same time, SMXL6,7,8 was able to recruit transcription factors and inhibit their transcription activity, inhibit the transcription of early response genes of monopods, regulate branching and other developmental processes.
    , SMXL6,7,8 is a new type of inhibitory protein with the dual function of transcription factor and inhibition protein. this research is considered to be a breakthrough in the field of single-footed gold esters signaling, and proposes a new plant hormone signal transduction mechanism, which is of great significance for improving plant strain type and nutritional efficiency.
    " study found that SMXL6, SMXL7 and SMXL8 of the one-footed gold nesteride signal pathway are new inhibitors with the dual functions of inhibitors and transcription factors, and revealed the molecular mechanism of single-footed gold-inner esters regulating plant branch number, leaf elongation and anthrasin glycoside accumulation, which provides a new idea for exploring the mechanism of plant hormone action, which has important scientific significance and application prospect. Xie Daoxuan
    , a professor at Tsinghua University, and Yao Ruifeng, a professor at Hunan University, noted in a commentary written specifically for the study.
    , but in the eyes of the researchers, there are still many unsolt mysteries in the one-footed gold ester signal transduction mechanism.
    Li Jiayang said, for example, other members of the SMXL family of amoeba and SMXL6, 7,8 in crops such as rice is also available in the same source protein transcription factor function? How did the transcription factor function of SMXL6, 7,8 evolve? SMXL6,7,8 regulates different growth and development processes by combining which transcription factor specificity? "The analysis of these problems will help to further analyze the signaling pathways of one-footed gold necides and gain an in-depth understanding of the molecular mechanisms by which one-footed gold-inner esters regulate plant growth and development." (Source: Science Network Han Yangmei)
    related paper information:
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