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Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

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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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Aquaporins01:25

Aquaporins

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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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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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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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Overview of Transposition and Recombination02:13

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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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Xylem and Transpiration-driven Transport of Resources02:03

Xylem and Transpiration-driven Transport of Resources

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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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Regulation of Water Output01:26

Regulation of Water Output

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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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Updated: Feb 18, 2026

Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring
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細胞特異的なトランスクリプトミクスとノックアウトは,草の口腔の動きにおけるアクアポリン機能を明らかにしています.

Lei Ding1, Maxime J Laurent1, Sylvain Legay2

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

The New phytologist
|February 17, 2026
PubMed
まとめ

トウモロコシの守護細胞 (GCs) と補助細胞 (SCs) は,異なる遺伝子発現パターンを示しています. GCのZmPIP1アクアポリンをノックアウトすると,特に水圧下では,口腔の開口が強化されます.

キーワード:
RNA-seqqが使われています.アクアポリンズ (aquaporins) とは細胞特異的ノックアウト護衛細胞は,守護細胞である.トウモロコシ トウモロコシ系統遺伝学的な分析を行いました.ストマタル運動とは副細胞は子細胞である.

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Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells
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Measuring the Osmotic Water Permeability Coefficient Pf of Spherical Cells: Isolated Plant Protoplasts as an Example
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Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells
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Measuring the Osmotic Water Permeability Coefficient Pf of Spherical Cells: Isolated Plant Protoplasts as an Example
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科学分野:

  • 植物生物学 植物生物学
  • 分子生物学は分子生物学である.
  • 遺伝学 遺伝学とは

背景:

  • 草のストマタル運動は,ガード細胞 (GCs) と補助細胞 (SCs) を含むユニークな4細胞構造に依存しています.
  • この構造内の細胞間相互作用を制御する分子機構は,まだ完全に理解されていません.

研究 の 目的:

  • トウモロコシのGCとSCでアクアポリン (AQP) を含む遺伝子発現を調査する.
  • CRISPRベースのノックアウトシステムを用いて,口腔調節における特定のアクアポリン,ZmPIP1sの役割を解明する.

主な方法:

  • トウモロコシの表皮からマイクロ解剖されたGCとSCのRNA配列解析,昼と夜.
  • GCまたはSCにおけるZmPIP1遺伝子のCRISPRベースの組織特異的ノックアウト.
  • 異なった水条件下でのノックアウト変異体のトランスクリプトミック分析とフェノタイプ評価.

主要な成果:

  • GCsとSCsの間で重要なトランスクリプトミックの違いが観察され,SCsは脂質代謝遺伝子に富み,GCは光合成に関連する遺伝子に富みました.
  • いくつかのアクアポリン (AQP) 遺伝子は,空間的および時間的な発現変異を示した.
  • GCにおけるZmPIP1sのノックアウトは,特に軽度の水不足下での口腔開口の増加につながった.

結論:

  • トウモロコシのGCとSCの間には明確なトランスクリプトミックのプロファイルが存在し,草の口腔調節に関する洞察を提供します.
  • ZmPIP1のアクアポリンは,トウモロコシの口腔の動きを調節する上で重要な役割を果たします.