Questions tagged [botany]

The study of plants and plant life.

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1answer
38 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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0answers
10 views

What is plant motility? [on hold]

I have to briefly talk about plant motility in a presentation, but I'm not sure what to talk about. I knwo what motility is and how it works in humns, I'm just having trouble with understanding how ...
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1answer
73 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
38 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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11 views

What is the tallest species of the Citrus genus?

As an amateur of botany I ask what the tallest species of the Citrus genus? Running a Google query brings examples to very tall Citrus sinesis but I didn't find a specific claim that this species is ...
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1answer
24 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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18 views

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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22 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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19 views

What happened to this grape?

This is a single grape that is much bigger than a typical one and it has a line in the middle, it seems like there's somehow two grapes in one. I wonder what caused this. Some kind of a mutation?
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30 views

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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25 views

What is the name of this little plant?

It was found in Malaysia in my school compound.
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12 views

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
31 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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33 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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1answer
142 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
124 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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16 views

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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45 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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39 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
58 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
39 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
43 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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0answers
53 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
48 views

Identify this wild plant with brilliant scarlet red flowers

Location is Virginia, USA They seem to last all summer
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35 views

Is this a living organism?

Is this thing a flower or marine plant?
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1answer
23 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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40 views

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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1answer
82 views

Why have plants evolved to photosynthesize glucose instead of another molecular compound?

I think this question can be broken down into two sub-questions: Why do plants produce $C_6H_{12}O_6$ as opposed to another molecule following the formula of $C_nH_{2n}O_n$? Why not $C_8H_{16}O_8$, $...
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0answers
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How does a heat-ratio sap flow sensor work and how invasive is it?

The Gizmodo article Undead Tree Stump Is Being Kept Alive by Neighboring Trees says: Leuzinger and Bader stumbled upon the stump while out for a hike. The woody stub caught their eye because callus ...
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1answer
47 views

Can someone tell me what these cocoons are?

I am camping in Slovenia and have found some cocoon like materials. They look like nests of some kind and are about 30cm long and 10-15 cm wide. Can anyone help me find out what these things are? ...
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30 views

Xylem vessels, lignin, wood

I learnt that lignin impregnates xylem cells, causing the cytoplasm to die due to the inability of water and nutrients to pass freely, hence creating hollow tubes adapted to transport materials. This ...
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31 views

Is presence of air necessary for silica gel to absorb moisture?

I am a biologist currently doing field work where I need to quickly dry leaf samples using silica gel crystals. I use the orange indicating kind that are 2-4mm in size. The setup is like this. I ...
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1answer
46 views

What species of mulberry is this?

I have several mulberry seedlings that have popped up in my garden. What species (or hybrid-species) are they? Details: The location is Toronto, Ontario The date is July 18th, 2019 I have several ...
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1answer
34 views

Will plants accumulate toxins from soil contaminated by toxic substances like paint thinner/lead paint?

After my grandfather died, demolition crews dumped garbage from the house onto his huge vegetable garden, including lead-painted windows, aluminum, asbestos tiles and more. Much of it got burned in a ...
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17 views

What is the total mass of leaves on an 'average' mid-latitude deciduous tree?

I know that this is a broad question as there are a very large number of different species of tree with all manner of profiles, height, leaf sizes, etc. My ultimate goal is to estimate the total mass ...
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15 views

Do plant root exudates help plants metabolize the minerals in native rocks the roots encounter?

Plants require a wide variety of minerals just as we do. They must get those minerals from the soil their roots are growing in. However, most minerals are not in what I would call 'bio-available'. (...
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1answer
55 views

Where does the carbon in new spring leaves of a deciduous tree come from?

When a leafless deciduous tree 'comes to life' in the spring and puts forth new leaves, where does the mass for these leaves come from? The tree has no leaves to make use of photosynthesis to get the ...
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1answer
54 views

Is there any biosafety level scale for plant pathogens?

Biosafety levels commonly defined on basis of human/animal pathogens, but what would be the biosafety levels for plant pathogens?
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38 views

What is this spiky fruit/cone?

I am trying to identify an unusual cone or fruit found today on Tayside in Scotland. Here is an image. Can you help?
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1answer
47 views

What is the identity of this flower found in Mavericks Beach in Half Moon Bay, California, USA?

Please help identify this flower I saw in Mavericks Beach in Half Moon Bay, California. It was smelling soooo good, you can feel from distance. I want to buy and plant in my garden. Thank you,
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Why doesn't the soil get depleted after repeated clearing of vegetation?

In my neighborhood, there is a hillside owned and maintained by the local municipality. The hillside is generally overgrown with vegetation. Work crews clear out the vegetation multiple times ...
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1answer
121 views

Unknown Lamiaceae plant identification

A while ago I received a pack of seeds described as Pycnanthemum Pilosum / Mountain mint. The seeds are small (below 1 millimeter) and brown: Plants grown out of these seeds are around 40 centimeters ...
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59 views

What is the accepted theory of root and shoot apical meristem organization?

I learned many theories of root and shoot apical organization. Histogen theory, Haberlandt's division of eumeristem, Tunica corpus theory and cyto histological zonnation theory. But which is the ...
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2answers
88 views

Can someone identify this plant I saw in NYC (might not be native idk)

I've never seen a plant with these type of leaves before and was wondering if anyone recognized/can figure out the species.
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19 views

Chemical inhibition of fertilization in plants

Are there any chemical compounds that inhibit fertilization in plants after gametogenesis? Simply put, I am talking about spermicide or emergency contraception for plants. Specifically, I am ...
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2answers
149 views

Why does this plum/apricot hybrid look like brains?

Why does this plum/apricot hybrid look like brains? Notes: Here's a photo of what a normal fruit on the tree looks like. Location is Zone 5, east of Toronto. There are about 20 other fruits on the ...
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1answer
29 views

Can I use a basic compound microscope to analyze the ploidy of plant chromosomes?

So, I'm not really any kind of trained botanist. But I do have two things: some dandelion seeds from France, and, collecting dust in my garage along with related accessories, this thing. Normally, ...
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1answer
26 views

Long brown needly things fallen from tree?

I was walking next to a row of trees (I think coniferous) and found many of these things on the ground: A parallel bundle of 2-4 medium-brown needly things, about 15 cm long and 1 mm in diameter, not ...
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31 views

Could somebody please tell what tree genus is this?

Leaves of a tree in south Asia: It is in Pakistan, found in flat land habitats.
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1answer
39 views

Limitations of the Self-Incompatibility Mechanism in Plants

For a given plant species, how many types of S-loci exists to prevent self-pollination? I would like to know how often a plant stops fertilization process by other plants, thinking the pollens belong ...