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2006-08-16 01:42:40 · 25 answers · asked by ganesan a 1 in Science & Mathematics Botany

25 answers

Answer is ALL TREES,.. surprised?
I'll explain,.. photosynthesis as we know uses light to fix CO2 to form carbohydrates, but these carbohydrates produced by plant require O2 again for breaking them down for metabolic needs.
Trees will continue to photosynthesise as long as there is light,.... now comes the catch, there is always some light at night no? like moonlight artificial light from houses streetlamps etc, but its intensity is less hence provides less energy for photosynthesis, therefore PHOTOSYNTHESIS CONTINUES albeit at a very low intensity hence OXYGEN IS RELEASED. But this oxygen is used up for its own metabolism by the tree. Hence we say that trees do not release O2 at night

A fellow answerer has mentioned peepal tree, It was quite interesting to read the references he had provided, but they were not scientific at all, just a religious website claiming that peepal gives out O2 at night, no scientific references there, no mention of this anywhere else i searched, hence his answer i am afraid is not correct

2006-08-16 04:38:54 · answer #1 · answered by Dr.Gagan Saini 4 · 5 1

When any tree is exposed to sunlight it performs the Photosynthesis reaction. So when you expose any tree to a light having a same wavelength as that of sunlight , in the night it will give oxygen as a byproduct also .

In reality, there is no tree which gives oxygen during night also , unless of course when exposed to sunlight.

Hope i have answered your question.

2006-08-17 01:43:21 · answer #2 · answered by Anonymous · 0 0

Peepal Tree because most plants largely uptake Carbon dioxide (CO{-2})and release oxygen during the day (photosynthesis) and uptake oxygen and release CO{-2} during the night (respiration). Some plants such as Peepal tree can uptake CO{-2} during the night as well because of their ability to perform a type of photosynthesis called Crassulacean Acid Metabolism (CAM).

However, it is not true that they release large amounts of oxygen during the night. CAM is one of the three types of photosynthesis pathways occurring commonly in plants; the other two being C3 and C4 pathways.

Of these, C3 is the most common among land plants. CAM occurs primarily in desert plants and epiphytes (plants that live on other plants, usually large trees). CAM plants do not open their stomata during the day in order to minimise water loss. During the night, they open their stomata and fix CO{-2} in the form of malate .

During the day, they breakdown the malate and use the released CO2 through Kalvin cycle to produce sugars, similar to C3 plants. However, CAM is an energy inefficient reaction and hence plants use CAM only during certain conditions.

Peepal tree is a hemi-epiphyte in its native habitat i.e. the seeds germinate and grow as an epiphyte on other trees and then when the host-tree dies, they establish on the soil. It has been suggested that when they live as epiphyte, they use CAM pathway to produce carbohydrates and when they live on soil, they switch to C3 type photosynthesis.

So, Peepal tree would either release or not release CO{-2} in the night depending on if they are epiphytic or not. For other CAM plants, it would depend on if they have adequate water or not, or other environmental factors.

2014-10-28 04:02:08 · answer #3 · answered by Surinder Chechi 1 · 2 0

Because the animals and the tree are not in an airtight system, and even if they were, there's a lot of air in and around a tree that has a lot of oxygen because of the tree producing it during the day.

2016-03-17 00:12:51 · answer #4 · answered by Anonymous · 0 0

Both respiration and photosynthesis take place continuously in green plants. However, during daylight photosynthesis is considerably greater so there is a nett output of oxygen, during the night the opposite is true and there is a nett output of carbon dioxide.

2006-08-16 14:27:47 · answer #5 · answered by springday 4 · 0 0

Photosynthesis does not occur at any appreciable level in nature in the dark. Sunlight is required to provide the energy required to convert CO2 and water into sugars. The by-product of photosynthesis is oxygen, so no appreciable amounts of O2 are released by plants at night, because they aren't photosynthesizing in the dark. Simple.

2016-09-23 11:27:37 · answer #6 · answered by Clem 1 · 0 0

All trees give oxygen at night as well as in the day. As long as they are taking in CO2, they are creating O2.

2006-08-16 15:58:00 · answer #7 · answered by Tony T 4 · 0 2

Night-breathing plants are perfect for your bedroom, because they put oxygen into the air around you while you sleep, and take away the carbon dioxide that you breathe out. The snake plant and aloe vera plant are two night-breathers that are really easy to grow.

2006-08-17 02:14:00 · answer #8 · answered by TIMEPASS 3 · 0 0

Banyan Tree in English and Bargad in Hindi

2014-07-10 04:08:21 · answer #9 · answered by ? 1 · 0 0

all green trees when exposed to artificial light in night with wavelength(impt:

2006-08-16 02:00:13 · answer #10 · answered by natanan_56 2 · 0 0

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