chromoplast

Japanese: chromoplast
chromoplast

The mechanism by which chloroplast development and degeneration are regulated is not well understood, but cytokinins promote chloroplast development and inhibit degeneration. In the case of fruits that contain chromoplasts, the thylakoids of the chloroplasts break down during fruit ripening and become filled with carotenoid-containing plast granules or carotenoid crystals to form chromoplasts.
[Chemical Reaction]
In response to light, chloroplasts undergoing photosynthesis (1) release dihydroxyacetone phosphate into the cytoplasm as a substrate for sucrose synthesis in the cytoplasm, and (2) indirectly transport ATP into the cytoplasm using shuttles of dihydroxyacetone phosphate, 3-phosphoglycerate, and oxaloacetate and malate (Figure 7).

*Some of the terminology that mentions "chromoplast" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…葉緑体の発達,退化の制御のしくみはよくわかっていないが,サイトカイニンは葉緑体の発達を促進し,退化を抑制する。有色体chromoplastを含む果実の場合には,果実の成熟時に葉緑体のチラコイドが崩壊し,多量のカロチノイドを含むプラスト顆粒またはカロチノイドの結晶で満たされ有色体となる。
[化学反応]
 光を受けて光合成を行っている葉緑体は(1)細胞質でのショ糖合成の基質としてジヒドロキシアセトンリン酸を細胞質へ放出するほか,(2)ジヒドロキシアセトンリン酸と3‐ホスホグリセリン酸およびオキサロ酢酸とリンゴ酸のシャトルshuttleを使って,間接的にATPを細胞質へ運び出す(図7)。…

※「chromoplast」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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