Questions tagged [botany]

The study of plants and plant life.

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48 views

What is the need of mucilagenous coating in pollen grains of aquatic plants?

I'm a high school student from India and here in our prescribed biology book(NCERT), it is written that pollen grains of aquatic plants have a mucilagenous coating to protect them from wetting. My ...
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2answers
128 views

Osmotic pressure

Osmotic pressure is defined as: The pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis. And yet water moves from low osmotic ...
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1answer
25 views

Is there a balance or feedback between O₂ and CO₂ in the atmosphere?

Is there, globally, a balance of the concentrations of oxygen and carbon dioxide in the atmosphere? Plants convert CO₂ to O₂, and with the concentration of O₂, the tendency of plants to oxidize to ...
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1answer
79 views

What is the etymology for Pinus halepensis?

I have a problem of figuring out the etymology of Pinus halepnesis. An etymonline search with halepensis brought no result. It is unclear to me from the English wikipedia article and from the ...
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Are Hsp70 proteins only activated in response to heat shock?

Hsp70 proteins are chaperones that assist in protein folding in my plant physiology textbook it says the Hsp70 proteins were discovered by inducing heat shock. But do they only work in response to ...
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1answer
44 views

Photolysis in the Light Reactions of Photosynthesis [duplicate]

I'm a bit confused concerning photolysis. During the light reactions, photons are used to excite the chlorophyll molecules so they are passed to the primary electron acceptor. The electrons initially ...
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1answer
75 views

What is the role of the pyrrolidine/piperidine moieties in fagopyrins?

Fagopyrins are phototoxic compounds that cause fagopyrism. They are chemical compounds related to hypericin and pseudohypericin. Some variations lack one or both methyl groups, which I think is to ...
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2answers
102 views

Are there organisms that “branch more” near the leaf?

(I'm a computer scientist) Tree branching is a fractal patterns in nature. I know stems typically branch in two at each level (self-similarity). I guess there are plants or other organisms that ...
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1answer
105 views

What kind of leafy house plant is this?

I was given the plant as a gift. Started out small and has grown to almost 6 1/2 feet tall and has sprouted off spring. Original Offspring: Google reverse image search resulted in "Houseplant". ...
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1answer
79 views

Identification of an alpine blueberry type

I'm trying to figure out what kind of berry this is. It can be found all over the Swiss, French, and Italian alps, generally right where ordinary blueberries are (the ones one would eat). However, ...
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25 views

Effect of angle of light on flowering of plants

I understand that the angle of light changes the direction of growth in plants (phototropism), but would the angle of light have any effect as such on the flowering of plants? Thank you!
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1answer
184 views

What happens to plants if they are exposed to “sunlight” 24h a day?

I just wondered if one could grow plants faster, if they were exposed to sunlight-like light all the time. In a similar question which is not the same, I could confirm that plants have different ...
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1answer
56 views

Can I sterilize the equipment for experiments without an autoclave?

If I don't have access to an autoclave, can I sterilize my equipment in a regular pot. If so, what time is needed at about 110°C (I measured inside) for a proper sterilization?
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2answers
128 views

Which cultivated plants produce most nectar for pollinators?

Pollinators are important for many crop types (e.g. wikipedia list), but I am wondering how important the crops are to feed the pollinator. Obviously, some of the crop plants provide much more food ...
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17 views

Is this a Tabebuia impetiginosa – Pink Trumpet Tree Flower?

Is this a Tabebuia impetiginosa – Pink Trumpet Tree Flower? From Panama.
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0answers
25 views

What are the standard bio-safety protocols for preparing plant pathology herbarium specimina?

What are the standard bio-safety protocols for preparing plant pathology herbarium specimina? I searched google but I did not found anything relevant, nor in my textbooks. I want to know about what ...
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1answer
79 views

What kind of object is this?

I'm unsure whether to call it a fruit or a vegetable. I found it on the road in a neighborhood and decided to pick it up before a car squashed it. (Thus, my initial guess was a squash.)
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49 views

Folded stem on apples - does it have a name?

I have some Newton Wonder apple trees. One feature of the apples it bears is that the flesh around the stalk is occasionally elongated out of the calyx. Below is a picture that shows this on the near ...
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1answer
526 views

What is the genetic reason that this flower has petals of two different colors?

I have two different varieties of the flower, portulaca: one is bright pink, the other is pure white with pink specks at the centre. Recently a flower bloomed which had 50% of the former and 50% of ...
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1answer
68 views

What is the name of this plant with a compound leaf of 8 leaflets?

this plant is present in my lawn and I don't know it's name. It is actually diseased and I'm trying to figure out what it is.
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1answer
161 views

What is the difference between sieve cells and sieve-tube elements?

I looked it up and I'm still confused. Apparently, sieve cells lack sieve plates? What does that really mean? It's difficult to find a good picture of either.
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4answers
151 views

Is it true to say that the genome of trees includes or at least “encapsulates” the genome of mushrooms?

As a botany amateur, I know that mushrooms (which are of course studied in field of mycology and not botany) are dependent in trees or shrubs (and maybe also bushes) and that there are generally ...
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Name for fluid that leaks out of phyllid (non-vascular) plants?

As Wikipedia says (https://en.wikipedia.org/wiki/Non-vascular_plant): Consequently, phyllids are unable to control the rate of water loss from their tissues and are said to be poikilohydric. And ...
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1answer
223 views

Flowers sent by the birds

Birds have sown seeds on my ground and this beautiful flower has sprung. What's the name of this flower? I live in Sao Paulo, Brazil
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1answer
83 views

Effect of light intensity on the frequency of stomata

According to this article, the frequency of stomata increases with an increase in the intensity of light. What I inferred from this is, since the rate of photosynthesis increases at higher light ...
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1answer
233 views

Identify this unusually-shaped, orange-colored fruit that grows in pairs?

The photos below were taken on the island of Penghu in the Taiwan straight in October. This was in a public place and the small tree (about 3 meters tall, trunk perhaps 8 to 10 cm diameter) had ...
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1answer
329 views

How is C4 pathway more water efficient than C3 pathway in photosynthesis?

In the C3 pathway: 1 H2O molecule is required for the fixation of 1 CO2 molecule. In the C4 pathway: The only H2O molecule used is in the calvin cycle, so 1 H2O molecule required for fixation of 1 ...
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1answer
27 views

Which one is better to use for water stress experiment GWAS or RNASeq?

This is my first time in this area of research. I am working on 95 varieties of bambara groundnut. I have done the agromorphological characterization of these varieties as well as the genetic ...
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A single leaf in a very strange air current / wind?

Here is my eight years old movie where I have pictured a single leaf moving in a very weird way: https://www.youtube.com/watch?v=sCjvgdfNCjU Can someone explain me what is depicted in this movie (...
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48 views

What causes change of sex in certain monoecious plants such as Papaya?

certain male flowering plants can be converted to female flowering and fruiting such as Papaya plants by just insertion of an iron nail in their/it's stem near it's roots? How can iron nail alter it ...
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Are there any evolutionary reasons for the different tree shapes? If so, What are they?

So we know there are a thousand types of trees with different shapes. We have Columnar shaped trees: Pyramidal or Conical shaped trees: Weeping shaped trees: And we also have Round, Vased, Open-...
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32 views

What is the name of this little plant?

It was found in Malaysia in my school compound.
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Optimal Growing Conditions concerning CO2 level (ppm) for aquatic plants

I know this is rather specific but I would like to know what level of CO2 concentration in the water is optimal for the highest possible plant growth rate. I did an experiment where the growth rate ...
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1answer
295 views

What is the difference between transpiration and evapotranspiration?

According to my point of view transpiration and evapotranspiration are different things, but i am confused about this topic. After great effort, I found a major difference between it. Transpiration: ...
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35 views

Effectiveness of feces as a fertilzer

How effective is feces such as cows, chicken or horses for fertilizing the earth of a garden in order to grow crops.
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2answers
127 views

Is this aquatic plant duckweed or something else?

This plant has been growing in my pond for quite a time now. It multiplies in large numbers rapidly. Some told me it is duckweed or is it something else?
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1answer
171 views

Is the Amazon forest O2 and CO2 neutral?

In these days, we receive a lot of concerning news about the Amazon burning. Recently, I came across widespread claims about the production of O2 and the absorption of CO2 by the Amazon forest, ...
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2answers
137 views

What species is this? What the fruit?

The berries of the fruit are sweet. The tree is growing in Israel.
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Length at which a branch 'branches'?

An image from this question (and originally from Karl Niklas' computer model) has prompted the following question: The branches in this tree divide with increasing frequency as we progress from the ...
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63 views

Cactus plant identification

I received this cactus as a gift and I'd love to know the family/scientific name. Only one flower has bloomed since, it was between orange and yellow. At first it was perfectly spherical, but in one ...
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0answers
46 views

Can anyone please help me identify my house plant?

I know this may be an impossible task, but I am one to hope ! My mum had a house plant which had small, green, oval shaped leaves which naturally grew towards the ground (hanging plant). Once every ...
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0answers
65 views

What is the name of this flower (on a tree)?

Here is a photo of a big red flower-like structure on a tree on Lama Island, close to Hong Kong. Does anyone know the name of the tree and what the black "berries" are attached to the "flower"?
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1answer
43 views

Why do my tomatoes start to rot on the same fruit part?

I observe a phenomenon for many years now. I observe it on a wide diversity of tomatoes produced all over Europe and Northern Africa that are sold at my local supermarket. When I keep my tomatoes at ...
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1answer
44 views

Properties of berries that are not shared by strawberries [closed]

What are examples of properties that (all) berries (from a botanical point of view) have and that strawberries do not have? This does not need to be the exact reason, why strawberries are not counted ...
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1answer
120 views

Leaf formation on unknown tree: cocoon or something else?

A small tree in my yard has leaves which appears to double over themselves. The first two pictures show this phenomena, and the third is the same tree to maybe aid identification. I can't absolutely ...
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0answers
70 views

Why don’t plant cells need centrioles? [duplicate]

I’ve just learned about cell division and I noted that plant cells don’t have centrioles but still undergo cell division. I’ve read a few documents about it and wondered why plant cells don't have ...
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1answer
61 views

Identify this wild plant with brilliant scarlet red flowers

Location is Virginia, USA They seem to last all summer
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1answer
131 views

Is the quiescent centre only found in monocot roots?

I read that the quiescent centre is present between the dermatogen and calyptrogen. As calyptrogen is only present in monocot root, does that mean quiescent centre is only found in monocot roots?
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1answer
35 views

Photosynthesis immature fruits [duplicate]

Do immature fruits perform photosynthesis? Yes they have chlorophyll bodies. But do they have stomata through which they can absorb carbondioxide like the green leaves? Sincerely Ulrik
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What is that? Dry brown fungus? See photo please

It has appeared two days in a row on my balcony, at exactly the same place. There's nothing near that can give me a hint of what it is. The birds can access the place easily. It's an inch in size, it'...

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