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Questions tagged [photosynthesis]

For questions about the process by which autotrophic lifeforms convert Solar energy into usable energy.

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Beryllium photosynthesis for floating plants?

I am currently building a planet that weighs about 4 earth masses and it's radius is 2.3 times larger than that of earth's. It is an ammonia planet (as the title suggests), and has ammonia oceans with ...
Neil Iyer's user avatar
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1 answer
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Questions about Pycocyanin [closed]

Okay, so I have been reading on phycocyanin for blue plants, for a spec bio project, and I have several questions. Which are all closely related in terms of how it functions.They are essentially all ...
DanceroftheStars's user avatar
4 votes
3 answers
245 views

Bioluminescence due to photosynthesis

I'm wondering about how to make my photosynthesising organisms all glow. Basically, I want to make bioluminescence a consequence of photosynthesis, as if the organelles themselves produce light in the ...
AxobitMelodies's user avatar
5 votes
2 answers
307 views

How deep underwater can red photosynthesis work?

The Setting: I have a binary star system. First star: K5.2V class Orange Dwarf, 60% the mass of Sol, 17% luminosity of Sol, and at 4.5 billion years old. This star is the only one with a planetary ...
Atlas the Worldbuilder's user avatar
3 votes
7 answers
1k views

Replacing Light in Photosynthesis with Electric Energy

I am currently attempting to construct my alien planet with exotic forms of life that use alternative metabolisms. I got an idea that I could perhaps somehow replace the photon energy required in ...
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What could be an alternative for chlorophyll for cyanobacteria that use five micron infrared to make energy?

What would be a viable chlorophyll like protein be for a cyanobacterium that absorbs infrared light at the 5-20 micron range to produce energy in the form of ATP?
GrimmReaper18B's user avatar
13 votes
4 answers
3k views

Can plants use Light from Aurora Borealis to Photosynthesize?

I am currently designing an alien world and I had the idea that the planet would have constant auroras nearly everywhere due to its host star. At first, I just had some ideas on how that might affect ...
Venik Hue's user avatar
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5 votes
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Could any photosynthesis occur at 5.5 AU on a warm planet?

I'm designing a habitable planet orbiting an M-dwarf, which is orbiting a G star at 5.5 AU. The orbit around the G star keeps the "night-side" (not technically an accurate term in this ...
Elhammo's user avatar
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2 answers
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Black photosynthetic large active animals

Previous questions have addressed whether a large active animal could run off photosynthesis alone and the answer seems to be no and that it could only provide around 4% of the animals daily usage but ...
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4 votes
3 answers
168 views

Plausibility of an Ecosystem Based on Giant Diatoms?

In this wildly divergent Earth timeline, a group of diatoms evolved to be up to a few inches across (rather than 2mm or less). With this group presumably developing some similar traits to organisms ...
Vakus Drake's user avatar
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Could an organism evolve photosynthesis using internal microscopic structures instead of using pigments?

I understand that most animals that look blue don't have blue pigment but instead have microscopic structures that scatter blue light. I was wondering if it would be possible for an organism to ...
Anders Gustafson's user avatar
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2 answers
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Could mermaids grow algae with bioluminescence?

Bioluminescence can cause photosynthesis, it has been confirmed. But is it feasible to grow algae, or some other plant, by the light of bioluminescence alone? Is it technically feasible with existing ...
Johnny's user avatar
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Photosynthetic life using gamma radiation

Okay, so I have a planet that gets from its star a solar flux of 1360 W/m^2. The catch? As the star is powered by matter-antimatter reactions, it's predominantly, if not entirely, gamma rays. There is ...
TysonDennis's user avatar
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3 votes
2 answers
193 views

Kinetically powered plant

This contributor to Deviantart had this idea that on eyeball Earths some plants might grow in the shadow of bigger plants and get energy from the wind, like a naturally occurring wind turbine. My ...
Joe Smith's user avatar
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Is it feasible to have an oxidizing planetary atmosphere without the presence of an organic photosynthesis of some kind on the planet?

With the emergence of cyanobacteria on earth 3.5 billion years ago, the shift from a reducing to an oxidizing atmosphere began. “The atmospheric O$_\textrm{2}$ levels (in PAL; i.e., normalized to the ...
RosesBouquet's user avatar
3 votes
3 answers
225 views

Society with photosynthesis-capable humans

What would motivate photosynthetic human beings to work on menial jobs like cleaning , dish washing etc. - jobs where earning for food is main motive? For such creatures, food could be prepared from ...
Amruth A's user avatar
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9 votes
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An ecosystem based on anoxygenic photosynthesis?

The organisms in the oxygen based ecosystem we have today is perfectly adapted to each other. The ocean is filled with water, and on land it falls from the sky. Plants, algae and cyanobacteria split ...
Trond Jansen's user avatar
2 votes
1 answer
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A desert planet with temperate polar regions could sustain how much plant-life? Any?

One proposed type of desert planet is one in which the equator and the "tropics" are harsh, hot deserts, but the polar regions are temperate, habitable, and lush with life. You can see an example of ...
cowlinator's user avatar
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What would a silicone-based plant, especially a tree, look like?

This question's information is based on the answer in my previous question about what the aquatic creature need in order to live or survive in my acid water? The thing that's not in the description ...
Li Jun's user avatar
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Alternative to Magnesium's Role in Photosynthesis

It is a known fact that magnesium is a very important part of photosynthesis and chlorophyll. I have looked everywhere to try to find out this question but I have never really gotten a solid answer. ...
Altraxian's user avatar
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Algae using UV light from auroras for photosynthesis

I was reading some questions on Quora and I found this claim: The polar regions have a very odd reason for them to have so much oxygen production. You see the Polar aurora run day and night in the ...
The Square-Cube Law's user avatar
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2 answers
687 views

Nocturnal Photosynthesis

It's a basic fact that most plants need sunlight to generate growth. Sure, they also need water and nutrients, but their reliance on sunlight is the one sole thing that separates them from animals. ...
JohnWDailey's user avatar
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Archipelago worlds build up atmospheric oxygen faster?

I've read super-earths might become archipelago planets. Picture shallow seas, under a thick atmosphere that alternates between muggy and clammy. Because a bigger share of the surface would be ...
aadv's user avatar
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What could justify an animal photosynthesis?

Photosynthesis does not provide enough energy to allow animal activities on its own (see this post for example). But can we think of a species using photosynthesis as a secondary energy source? Here ...
Argemione's user avatar
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11 votes
6 answers
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What light would my cloudy planet receive from a red dwarf star?

What light spectrum would hit the surface of a planet orbiting a red dwarf star? The planet is a humid greenhouse with a cloudy atmosphere and a strong ozone layer. Over 80% of the surface is water. ...
CatoRockwell's user avatar
8 votes
1 answer
524 views

Photosynthesis analog, plausible?

So on a planet with a chlorine based atmosphere and only a small amount of oxygen, here is my proposed mechanism for chlorine based photosynthesis. Carbon tetrachloride, since it is a liquid at 70 ...
Caters's user avatar
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29 votes
13 answers
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Can a planet harbor plants of different colors without one pigment outcompeting the others?

On Earth, all plants are green because they contain the pigment chlorophyll, which photosynthesizes by absorbing all light except green light. However, it is quite possible - if not likely - that ...
SealBoi's user avatar
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5 votes
6 answers
577 views

Would there be anything preventing a world where humans get energy by photosynthesis?

Is there any restrictions to have a world where humans gain energy by photosynthesis?
Gallanger's user avatar
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9 votes
3 answers
551 views

Given an apparent solar brightness of <30% Sol from Earth, how differently would plants evolve?

Though my star is 1.71 LSol, my planet orbits at about 2.14 AU. Following a back-of-the-envelope equation for apparent brightness, this gives the surface of my planet approximately 30% of Sol's light ...
Rúnatál Davino's user avatar
4 votes
2 answers
360 views

Biochemistry of Plants harnessing heat-energy when blue-shifted light is scarce

What biochemical reactions might be employed by plants to harvest heat energy when light energy is scarce or even missing? What is the temperature range over which this biochemical reaction can work? ...
Christmas Snow's user avatar
5 votes
3 answers
640 views

A double-bright Moon and plant growth

It's Earth and the moon with all parameters as they are in real life with one exception, the moon is twice as reflective as usual. Instead of an albedo of 0.12, the moon has an albedo of 0.24. This ...
Green's user avatar
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4 votes
2 answers
299 views

Why would plants on an Earth-like planets photosynthesize without using blue-wavelength light?

According to Wikipedia, ...plants are green because chlorophyll reflects green light. And chlorophyll is found in all plants because it is the molecule that absorbs the light that is used to make ...
JSCoder says Reinstate Monica's user avatar
2 votes
5 answers
480 views

How to Use Photosynthesis Creatively in Humans

I've seen many questions here about humans being capable of photosynthesis. And I know, humans don't have enough surface area to power themselves full time. However, that's assuming that the energy ...
Lot-Of-Malarkey's user avatar
3 votes
2 answers
1k views

Chloroplast organelle in human

Could a human's DNA be altered so that in every skin cell they would have a chloroplast organelle? How would this affect the rest of the body?
Etanos24's user avatar
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5 answers
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If humans could photosynthesize, what would our clothing look like?

So we humans get big into genetic modification and figure out how to make ourselves photosynthesize through our skin, and somehow it generates enough energy to be worth our while. Obviously we'd still ...
Jim Wu's user avatar
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0 votes
2 answers
320 views

Calculating the solar spectrum received by a planet

How do I calculate the spectrum of light experienced on the surface of an alien planet? I need it to decide what color the local photosynthetic life will predominantly be.
Ettina Kitten's user avatar
8 votes
4 answers
835 views

Creating plants that do not rely on photosynthesis but still create oxygen

My planet has an increased axial tilt, resulting in crazier winters and summers and higher temperatures. For most places, the temperature never drops below freezing - even in the winter, but the days ...
Xenobear's user avatar
1 vote
2 answers
258 views

How to build a race which uses photosynthesis? [duplicate]

I've built a species that does eat, but I would also like them to get some of their energy from the sun. Consider the conditions to be identical to earth as far as the sun and atmosphere is concerned. ...
Erin Thursby's user avatar
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0 votes
5 answers
254 views

Creating the Alga of algae

I have to feed my dinosaurs, the plants in the land are mostly destroyed, but the ocean is almost "untouched", so of course, I'm gonna feed my feathery friends with a lot of algae, specially made by ...
Mephistopheles's user avatar
7 votes
2 answers
658 views

Could a plant-like forest or jungle form in an underground lava dependent ecosystem?

Could an alien underground macroscopic ecosystem including human sized plant-like organisms evolve around lava as an energy source? These organisms could use heat and/or light from the lava to ...
Stephen Schroeder's user avatar
6 votes
3 answers
591 views

Is it feasible for an organism to feed off cosmic radiation?

Cosmic rays are energetic particles coming from space that hit the Earth's atmosphere and produce a lot of secondary radiation (some of which we see in visible light as aurorae). Would it make sense ...
pablodf76's user avatar
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8 votes
10 answers
1k views

If humans were photosynthetic, would there be an impetus for technological development?

Picture this, humans (or human-like sentient beings) having the innate ability to photosynthesise their food in a similar manner to plants - thus providing all the nutrients required for sustained ...
user avatar
4 votes
2 answers
436 views

What stellar qualities would allow our Sun to support human photosynthesis?

I am interested in a character or race of humanoids similar to the green man in the tent in Wolfe's Book of the New Sun. What qualities would the Sun need to have in order to support a race of human-...
zzu's user avatar
  • 826
3 votes
3 answers
168 views

How would the lifestyle of people change if they learned to live by doing photosynthesis?

Consider a parallel universe where people have developed into beings who can survive by doing photosynthesis. That means there is no need for food they can just survive just by using sunlight. Now ...
guleria's user avatar
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14 votes
3 answers
1k views

Efficiency required of a photosynthetic system to support human level activities

Chlorophyll as we know it on earth is estimated to be between 3% and 6% efficient in converting light energy to useable biomass. This support slow growth and no movement of plants like that observed ...
Green's user avatar
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4 votes
2 answers
777 views

Thermosynthetic Life-form

As recommended by another user, on a different question I asked, I pose this new question under the following criteria: The creature I'm trying to create has evolved, though it may not have been ...
Anonymía's user avatar
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9 votes
5 answers
2k views

A more alien world: Flora

In the (relatively new) Star Trek movie Into Darkness, we see Dr. Bones and Captain Kirk in a world composed mainly of red plants. Obviously these are just eye candy with no real basis behind it, but ...
Quiquȅ's user avatar
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31 votes
2 answers
1k views

Hydrogenenic Photosynthesis: Strategies for animals

Hydrogenic photosynthesis reduces methane and water to build biomass ($\text{CH}_2\text{O}$) and releases hydrogen: $$\text{CH}_4 + \text{H}_2\text{O} + \text{photons} \to \text{CH}_2\text{O} + 2\...
rumguff's user avatar
  • 4,198
5 votes
3 answers
827 views

What would the flora on a Methane world be like?

Linked: What would animal life on a methane world look like and how would it evolve? What would the conditions on a methane world be like? How would an intelligent race on a methane world achieve a ...
Jax's user avatar
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