怎麼判斷植物的死亡及死亡時間？

01-21

對於人類
比如在醫學上有腦死亡之類的
日常生活中，看到某個人心電圖在某一秒，從折線變成一條直線的時候，會說這個人他死了。
那植物呢？
怎麼著可以說「這一株，一整株植物死了」？

植物死亡有沒有準確時間呢？有沒有什麼時間，會突然指著某一棵樹說，上一分鐘，這棵樹死了，它的心臟不跳了之類的呢？

瀉藥~

這個問題首先是要說明動植物的區別，動物是有行動能力的生命，植物絕大部分是來說是沒有迅速的自主行動能力的生命，這裡面最主要的原因是植物缺乏足夠的運動器官和統一協調的神經系統，就像一輛車沒有輪子不行（氣墊飛車表示壓力不大）沒有電路系統也不行。你看動物，你家狗子要跑來舔你，首先眼睛鼻子看到嗅到你了（植物也其實有很靈敏的感受系統），腦子發聲了，「去舔她」，然後神經可以一路把信號定向的傳導到狗腿狗肚子肌肉處，然後肌肉開始收縮發力（植物其實也有信號傳導，但是大多是化學信號，很難定向，如果是動物這樣，就會到處感受到同種信號，你的狗子就痙攣了），肌肉通過燃燒供能物質，將其轉化為動能，狗子就跑到你懷裡來舔你了（而植物缺乏關鍵的運動器官，光憑自己生長來運動是很慢的，春筍生長快是有其他原因的）。

從這裡看，動物的死亡好認定，其實最簡單就是「不動」，比如蹬腿嗝屁倒地不起，心臟「不動」，呼吸「不動」，血液「不動」。都是認定的標誌。而這個「不動」其實對於植物來說也有意義，比如蒸騰作用「不動」，養分吸收「不動」，都可能是植物將要死亡的標誌。為什麼說將要呢？就是另一個問題了。細胞的全能性，生命基本都是由細胞或者類細胞組織構成的，細胞的存亡是最重要的，但是外界的情況是複雜險惡的，所以多細胞生物的細胞都是各司其職，有些負責運動，有些負責吸收營養，有些負責感知外界，大家擼起袖子加油干，才能奔小康嘛。但是，外界總是險惡的，總有某些時候，比如突然皮膚破口了，血液丟失了，免疫細胞不夠了（專性細胞大量失去），於是細胞本身具有的全能性就體現出來了，畢竟大家都自帶全部藍圖嘛，所以某些細胞就可以變成原來的細胞，具有它的功能。動物的全能性是很差的，幹細胞（專有的全能性高的細胞）用完就沒辦法了。而植物，理論上就算只有一個細胞剩下，在精心培養的培養下，還能重新再長成一棵大樹。這就是植物細胞逆天的全能性。也正因為這樣，植物的死亡的定義就很難判定了，不動？人家本來就不怎麼動。爛了，化了？只要有一塊組織，一個細胞存在，仍然有再生的可能。天雷劈了老樹，但仍可以發出小芽，壽終正寢的植物，根旁還有新枝。

當然，植物，特別是高等植物，是個精密的系統，一旦完全紊亂，也是無法自我調節過來的，認定方式比如，葉枯（生產器官）、枝幹（傳輸器官）、根爛（吸收器官），都會造成死亡的威脅，但是，你只要給它陽光，給它雨露，給它一個植物組織培養實驗室全套設備（逃），它將戰至最後一個細胞！

死亡，不屬於植物階級！

瀉藥

生命的本質是什麼

是可持續的活著的狀態

就是說他還在新陳代謝

動物的生命特徵比較明顯

因為大家都會動

就算快死了也會抽抽兩下

植物就比較尷尬了

耿直一點的植物會保持鮮綠的葉子挺拔的身姿

遇到像九死還魂草這種奇葩還真是傷腦筋呢

誰知道他是真死還是假死

難道真的就沒有辦法了嗎

當然有了

當你在問這棵植物是不是真的死的時候

估計他也離死不遠了

那麼面對這樣一棵犯罪嫌疑人

怎麼讓他招認

1花盆噴點水

他吸了又綠了就表示他又不想死了

萬一你非得說是大氣蒸發

水幹了他又沒反應，那就

2碳十四追蹤

再微弱的光和作用也別想逃出我的法眼

你說他是鬼蘭這種奇葩

或者人家在度假，葉綠素沒上線

我艹

還拿你沒招了

3上氧氣

關密閉容器里，時時檢測二氧化碳濃度

活著都得喘氣

管你動物植物

二氧化碳濃度停止上升

恭喜你

好好的一盆多肉被你養死了

可以參考，

附上鏈接https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm

這裡是說根和莖都糊狀了，植物就已經死了。(截圖未包括的下半文是講：當只有根或莖活著時該如何救活)

原文：

1，How do you tell if a plant is dead?

While this may see like an easy question to answer, the truth is that telling if a plant is truly dead can be a difficult task sometimes. Plants do not have vital signs like a heartbeat or breathing in and out that would make it easy to tell if it is truly dead or alive. Instead, you have to rely on more subtle clues. If your plant has lost all of its leaves or the leaves have all gone brown, don』t panic. If you suspect your plant is dead but you aren』t sure, the fastest way to tell if it is dead is to check the stems. The stems of the plant should be pliable and firm and will have a green cast on the inside if they are still alive. If the stem is mushy or brittle, check the roots for the same conditions. The roots, too, should be pliable but firm. If both the stems and roots are brittle or mushy, the plant is dead and you will simply need to start over.

2，Is the Plant Really Worth Saving?

The next step is to decide if you really want to make the effort of nursing the plant back to health. Keep in mind that a plant may still die despite your best efforts. Also, the plant will look utterly pathetic for weeks, months or even years. Is it worth spending the time to recover what may be a lost cause, or could you get a comparable but healthy plant at the local nursery or store for a reasonable price? If this is a plant that has sentimental value or is hard to find, than it is certainly worth saving. Otherwise, you should just start over again.

3，What to Do When Only the Roots are Still Alive？

If the roots are still good, but the stems are dead, you will be hoping that the plant re-grows from the roots. Cut away the stems a third at a time. You may find that as you get closer to the roots, the parts of the stem may be alive. If you do find living stem, try to leave as much as possible. If you find no living stem, leave at 2 inches of the stem intact above the soil. Place the plant in conditions where it will get roughly half the amount of sun that is normally recommended for that plant. Water only when the soil is dry to the touch. If the plant is able to, you will see new stems sprout from around the remaining stem in a month or two. If you do not, recheck the roots to see if the plant has died.

4，What to Do When the Stems are Still Alive

Trim away as much dead stem as you can find on the plant. Place the plant in conditions where it will get roughly half the amount of sun that is normally recommended for that plant or in indirect light. Water only when the soil is dry to the touch but do not let the soil dry out completely. In 3-4 weeks, maybe less, you will hopefully start to see new stems or leaves being produced where the old leaves were. As the leaves and stem become more fully developed, cut away any parts of the stems that are not producing leaves or stems. If you do not see any new leaves or stems after a few weeks, recheck the stems on the plant and prune away the dead wood as the stem dies. Even with all the love and attention in the world, it is sometimes not possible to save a badly damaged plant. Sometimes you just have to start over and try not to let what happened before happen again.

PS: 家裡的龍血樹死掉就是從根部腐爛的，挖出來才發現的…

煙花會謝笙歌會停生命的終結就是伴隨著停止和消失。

花會凋謝，葉會枯萎，根死了，也就死了吧。

這世界包羅萬象，植物的科目種類也太多了。有風格迥異的生命體。

生命的最基本特徵是新陳代謝。新陳代謝一旦停止，生命也就停止。