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相关概念视频

Gene Regulation During Sporulation01:17

Gene Regulation During Sporulation

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Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
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Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
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The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
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Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
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Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
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相关实验视频

Updated: Jul 21, 2025

Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging
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缺陷的66核编码了一种对玉米核发育至关重要的GTPase.

Yi Ming Wei1,2, Bo Hui Wang1, Dong Jie Shao1,2

  • 1State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, China.

Journal of experimental botany
|July 25, 2023
PubMed
概括

一个新的玉米基因,DEK66,对玉米核发育至关重要. 这种线粒体核糖体组装因子影响细胞能量,导致细胞核突变时出现缺陷.

关键词:
精子内皮 精子内皮是什么?这是一个GTPase.核心开发开发的核心.玉米玉米玉米是一种线粒体中的线粒体.线粒体核糖体的线粒体核糖体.

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科学领域:

  • 植物生物学 植物生物学
  • 线粒体遗传学 线粒体遗传学
  • 分子生物学分子生物学

背景情况:

  • 线粒体是通过氧化酸化负责细胞能量生产的重要器官.
  • 线粒体功能障碍会导致植物的各种细胞缺陷和发育问题.
  • 核糖体生物生成对于线粒体内的蛋白质合成至关重要.

研究的目的:

  • 识别和描述涉及到玉米核发育的基因.
  • 研究线粒体核糖体组装因子在植物器官功能中的作用.
  • 了解DEK66对玉米核表型和线粒体健康的影响.

主要方法:

  • 基因查以识别有缺陷玉米核的突变种.
  • 基因克隆和候选基因DEK66.6的表征
  • 分析野生型和突变型玉米中的线粒体结构和功能.
  • 转录组分析以评估突变物中的基因表达变化.

主要成果:

  • 一种新型突变,dek66,表现出有缺陷的玉米核与损伤的线粒体结构和功能.
  • DEK66编码了一种具有GTPase活性的线粒体核糖体组装因子.
  • 突变的dek66显示了增加的活性氧物种和编程细胞死亡在内细胞.
  • 与营养储存,呼吸链和线粒体核糖体相关的关键基因在突变者中被显著改变.

结论:

  • DEK66对于维持线粒体的完整性和功能而对正常的玉米核发育至关重要.
  • 线粒体核糖体组装因子在植物器官生物发生和细胞平衡中发挥着关键作用.
  • 这项研究提供了关于在玉米核发育中的线粒体功能障碍背后的分子机制的见解.