derek asked in 科學及數學生物學 · 1 decade ago

dark reaction能否在無光的情況下進行?

如果將一盆植物放在沒光的環境,但期間供應水同二氧化碳(即係個環境鎚左無光,其餘都正常),咁樣植物能否進行dark reaction?

2 Answers

Rating
  • 1 decade ago
    Favorite Answer

    dark reaction唔需要光, 係吖.

    環境沒光而有水同二氧化碳, 植物有冇dark reaction? 唔一定. 因為仲未知有冇[光解的產物]存在係植物內囉.

    冇照過光的植物裡有 ADP 和 NADP

    照光的時候, light reaction會將個d成份分別轉做 ATP 和 NADPH. 冇在呢兩樣產物, 係不可以進行dark reaction 的.

    所以, 將平時係放係室外既植物 偶然放入黑房幾小時, 係可以進行dark reaction, 因為植物身上仲有好多ATP 和NADPH.

    但係, 如果植物留係黑房超過一日, 身上既ATP 和NADPH用完晒, 咁就算有水, 有二氧化碳, 都唔可以繼續dark reaction.

    加上昨日做出來的glucose[或starch] 經一日既時間, 已經運到根部之類地方貯存, 係黑房放24小時, 葉子完全冇晒starch, 成個過程就叫做 destarch.

  • 1 decade ago

    The dark reaction is carbon fixation step(Co2 converted to organic substances)independent on light.It involves a series of enzymatic reactions which converts Co2 into sugars.This reation does not depend on light.

    Source(s): F.4 bio
Still have questions? Get your answers by asking now.