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相关概念视频

Regulation of Transpiration by Stomata02:04

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During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
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The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
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相关实验视频

Updated: Feb 18, 2026

Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring
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细胞特异性转录组学和淘汰揭示了草口腔运动中的水蛋白功能.

Lei Ding1, Maxime J Laurent1, Sylvain Legay2

  • 1Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348, Louvain-la-Neuve, Belgium.

The New phytologist
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概括

玉米守护细胞 (GCs) 和子细胞 (SCs) 显示出不同的基因表达模式. 在GC中淘汰ZmPIP1水族素可以增强口腔的开口,尤其是在水应力下.

关键词:
在RNA-seqq.在水中,有水.细胞特异性淘汰赛 细胞特异性淘汰赛护卫细胞是指护卫细胞.玉米玉米玉米是一种遗传学分析 遗传学分析牙腔运动是指口腔的运动.附属单元中的子单元.

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科学领域:

  • 植物生物学 植物生物学
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 草口腔的运动依赖于一个独特的四细胞结构,包括护卫细胞 (GCs) 和子细胞 (SCs).
  • 在这种结构中,控制细胞间相互作用的分子机制仍然不完全理解.

研究的目的:

  • 调查玉米GC和SC中的基因表达,包括水蛋白 (AQP).
  • 通过基于CRISPR的淘汰系统,阐明特定水素素,ZmPIP1s在口腔调节中的作用.

主要方法:

  • 在白天和晚上从玉米表皮中微切割的GCs和SCs的RNA测序.
  • 在GC或SC中基于CRISPR的ZmPIP1基因的组织特异性淘汰.
  • 在不同的水条件下对淘汰突变体进行转录基因分析和表型评估.

主要成果:

  • 在GC和SC之间观察到显著的转录组差异,SC富含脂代谢基因,GC富含光合作用相关基因.
  • 一些水素蛋白 (AQP) 基因表现出空间和时间表达变异.
  • 在GC中ZmPIP1s的淘汰导致口腔开口的增加,特别是在轻度缺水的情况下.

结论:

  • 在玉米GC和SC之间存在明显的转录组特征,为草口腔调节提供了洞察力.
  • ZmPIP1水素素在调节玉米口腔运动方面发挥着至关重要的作用.