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Cell Signaling in Plants01:25

Cell Signaling in Plants

5.7K
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...
5.7K
Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

29.0K
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.
29.0K
Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

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Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
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Plant Hormones01:56

Plant Hormones

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Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
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Meristems and Plant Growth02:36

Meristems and Plant Growth

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Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
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C4 Pathway and CAM01:27

C4 Pathway and CAM

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Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
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関連する実験動画

Updated: Sep 9, 2025

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
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ジャスモネート信号経路によるクロロプラストの整合性の制御は,成長-防御バランスと関連している.

Leah Y D Johnson, Ian T Major, Qiang Guo

    bioRxiv : the preprint server for biology
    |September 2, 2025
    PubMed
    まとめ
    この要約は機械生成です。

    ジャスモネートシグナリングは,クロロプラストの代謝を制御することによって,植物の防御を調節する. JAZ抑制器の喪失は,高防御状態で光合成装置の解体につながる.

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    Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana
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    A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
    12:18

    A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response

    Published on: April 17, 2016

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    科学分野:

    • 植物生物学
    • 分子生物学
    • 生物化学

    背景:

    • クロロプラストは植物のストレス反応に不可欠ですが,高代謝需要下でのホメオスタシスは十分に理解されていません.
    • クロロプラストから発生するジャスモナート (JA) 信号は,クロロプラストの代謝の核制御を調節するJAZ抑制剤を分解することによって免疫を強化します.

    研究 の 目的:

    • 高防御反応でクロロプラストの整合性がどのように維持されるかを調査する.
    • 植物の成長と防御のバランスをとる JAZ タンパク質の役割を理解する

    主な方法:

    • ジャズデカップル変異体を作って ジャズデカップルを操作した
    • コロナチン (JA受容体アゴニスト) で治療した *jazD* 植物.
    • グローバル・トランスクリプトと メタボライト・プロフィールと 遺伝子スクリーンを利用した

    主要な成果:

    • ジャズD変異体は 発光効果を損なわずに 成長防御を阻害した
    • コロナチン治療は,クロロフィルの急速な損失,クロロプラストのタンパク質/脂質の周回,そして光合成の崩壊を引き起こした.
    • MYC2とCOI1は,コロナチン誘発のクロロプラスト解体の主なレギュレータとして特定されました.

    結論:

    • 漸進的なJAZ抑制損失は,光合成装置の解体を含むMYC2依存の成長防御トレードオフを駆動します.
    • JAZタンパク質は,高防御反応中にクロロプラストの完全性を維持するために不可欠です.
    • ジャスモネートシグナリングは,植物成長とストレス反応のバランスをとるために,クロロプラストの代謝を制御します.