Questions tagged [botany]

The study of plants and plant life.

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2
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0answers
33 views

Can human pathogens present on plants become plant pathogens?

Since human pathogens sometimes live on the surface of plant leaves(read here and and here), and there are plant-pathogen microbes also living on leaf surfaces, is it possible for plant virulence ...
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48 views

Century old trees and evolution

We always think of natural selection as occurring at the level of populations not individuals. how about century old trees where germline is being produced from constantly dividing cells. Are all ...
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0answers
48 views

What plant is this? I can't identify

Please help me identify this plant. This was shot in the assam-meghalaya region of india.
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3answers
127 views

ID: Serated-leafed seedling

A seedling has popped up in one of my planters (acid soil; Toronto, Ontario). What is it? June 4, 2020: June 20, 2020:
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0answers
31 views

How do plants respire at night?

If the stomata close during the night to conserve water, how does the plant get oxygen for respiration when they are closed? Do they not fully close? Does the plant's metabolism slow down to ...
5
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1answer
72 views

Does dormant poison ivy contain urushiol in the above-ground portion of the plant?

I recently had a run-in with poison ivy (late spring; Canadian shield). The poison ivy plants had not yet leafed-out so I failed to identify them as a hazard. I think I must have either trampled ...
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22 views

Is there any animal database or website that classifies animals as wild / domestic?

Is there any animal database or website that classifies animals wild / domestic? Or.. the site that I can get the wild / domestic information of animal list...
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0answers
14 views

Is this may-flowering grass an Echinochloa (barnyard grass)?

There's a grass growing in my thyme pot on my balcony, that's currently flowering (end of May, Paris region, France, southern exposure, windy conditions), and I'm wondering what species it is: Here ...
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2answers
41 views

Bats, bees and nectar

I have been thinking about this for a long time and your thoughts would really help. Since it's known that bats spread Covid 19, I studied more about places that they may have contacted. The first ...
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0answers
21 views

Do chilli peppers change in composition after they change color?

I grow some chilli peppers and was wondering when the time is right to harvest them. Of course gardening-focused sources say that they are ripe when they change color. This usually happens very ...
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0answers
39 views

Identification and odd leaf anomaly

We're in the process of welcoming sheep, thus setting up the fences, now inside on of the areas, there is a small tree. Never seen leafs like this before. I suspect this to be some sort of anomaly/...
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26 views

Radiation mutation breeding in plant seeds: practical aspects

I did read some seed irradiation papers and they all use Gy as unit of measure, however I have never seen seed weights reported. How did they calculate that, since Gy is J/kg? Differencies aside ...
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2answers
92 views

Is it possible to reduce maturity time of plants with biotechnology?

I've heard of speed breeding which makes use of optimal circumstances in glasshouses and growth chambers. Is it also possible to shorten a plant's maturity time (i.e. the time it needs from being ...
2
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1answer
40 views

What did Darwin mean by “degraded flowers”?

One of the chapters of The Origin of Species says that "Certain plants, belonging to the Malpighiaceæ, bear perfect and degraded flowers;" Full passage for context Do you know which plant ...
2
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1answer
772 views

Difference between sexual and asexual spore

This Wikipedia article on Spores mentions this: In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for .... What is the difference between the sexual spore and ...
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0answers
30 views

When a 'v' letter should be changed to 'w' in botanical nomenclature?

When should be 'v' changed to 'w' in botanical names? (especially ones derived from names originally written in cyrillics). The International Code of Nomenclature for algae, fungi, and plants says ...
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1answer
290 views

What’s the Difference Between Grass and Sedge?

What’s the difference between grasses and sedges? in terms of anatomy and classification.
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1answer
25 views

What is the name of this part in plants, fruits, vegetables?

What is the name of this part of the plant, fruit, vegetable? The thing that the plant is connected with the tree and gets nutrients with? The part we usually cut out when eat fruit. Examples below ...
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1answer
54 views

Genetic mutations in plants

I am trying to plant some trees which are usually native to colder climates into Subtropical climate, is there any possibility that if i plant these 20 trees saplings in winters they will grow to be a ...
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2answers
498 views

Stem and Branch of plants

What is the difference between the stem of a plant and the branch of a plant. Is the branch part of the stem?
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15 views

Is it possible to accelerate active transport in plant vascular system using some electronic method?

I am from electronics background and got an understanding that electrical current affect plant growth. Based on this phenomenon, I got an idea but before I formulate my hypothesis and start ...
3
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1answer
47 views

What's the role of bromelain in pineapple?

Bromelain refers to one of two proteases found in pineapple and its relatives. Like other proteases, many believe it has therapeutic uses and it's the subject of a lot of research. But what role does ...
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1answer
69 views

Is there any study to find the plant with the absolute minimum light need?

Is there any study to find plants with absolute minimum light need? Consider a bathroom without windows that you have occasional artificial light (e.g. white LED light). Another question is there ...
6
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1answer
285 views

Trees growing around objects vs pushing them away. Where is the threshold?

If a tree grows against a taut wire then the tree will grow around it, eventually enveloping the entire wire. This often scars the tree, and if the wire is thick enough, it will interrupt nutrient ...
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0answers
74 views

Why some plants can be propagated from a leaf cutting but some can not?

I understand the process of leaf-cutting propagation as following: 1) with the help of auxin from the leaf, callus is forming on the wound and then roots are forming from callus, 2) with the help ...
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0answers
19 views

How to Identify Astragalus Species

I have several photos of a plant I believe to be in the genus Astragalus. I would like to determine the particular species in my area, the foot hills of San Diego County. Do I need a microscope to ...
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1answer
44 views

Are these structures real petals?

I don't know the name of the plant. It's a common house plant in Bangladesh. What interests me about its flower is the colorful leaflike structure that probably functions as a petal. What is this ...
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1answer
37 views

A plant in my aquarium seems to be growing small plants under its leaves, what's going on?

In my aquarium I have this plant. I think it's a kind of swordplant. I've loosely attached it to a large piece of driftwood in the hope that it will grow itself on there, I saw that they had done the ...
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19 views

Are there any studies on the solar latitude limits of different plant species, beyond which they wouldn't thrive even with suitable weather?

Not sure whether this belongs here or in the Gardening & Landscaping StackExchange, but here goes... According to maps provided in the paper Present and future Köppen-Geiger climate ...
2
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1answer
379 views

Unknown mite species in plant pots

Does anybody know what kind of mite this is? It is living in my pepper plants' pots. My region is south of Germany. (Baden-Württemberg) I will try to take another picture including some size ...
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1answer
39 views

What are these flowers on Kerguelen?

What are these plants, which resemble short pink sunflowers, in this photograph from Kerguelen island?
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0answers
22 views

Do floating plants on a quiet body of water significantly affect the evaporation?

A situation such as a pond where a plant like duck weed covers essentially all visible surface water : Is evaporation slowed or stopped ?
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1answer
24 views

How can I make legal mature female Cannabis plants to Flower in home during March (springtime)? [closed]

In December 2019 I purchased 4 Cannabis seeds Legally in Canada.Two of my plants are now about 100 cm tall. I am using wide-spectrum LED grow lights and have fertilized them both. I started with 16 ...
3
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1answer
144 views

Are these spinach leaves?

I often buy baby spinach from the store, and sometimes, in a few bags of spinach I also find these leaves: They have a different shape than the spinach leaves, they are a lighter green, and they ...
2
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1answer
79 views

L-system rule for different plant types

I have coded an implementation of L-systems (Lindenmayer systems) and would like to use it to generate realistic looking trees. Is there a reference list that shows which rules are most appropriate ...
3
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0answers
34 views

What to do with this Araucaria sprout

I live in Santiago, Chile, and I see this Araucaria frequently: For what I have read, it seems to be a female A. angustifolia individual (leaves are 2-3 cm long and a few mm wide, with a very sharp ...
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0answers
17 views

Relation of root length to plant size

I am thinking of making an aeroponics system. But after i finished my primary design I though to myself how deep should I make the container for the roots of my plants? Since I want to make my system ...
6
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1answer
168 views

Identify this tree?

I found this tree in Crete, Greece close to the sea, planted next to a building. Since I haven't seen this tree anywhere else in the island, I suppose it was planted by someone. Here are some pictures ...
35
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7answers
12k views

If plants benefit from carbon dioxide, why is car traffic something bad?

This is going to sound really stupid or as a joke, but... Ever since I was a little kid, I have been confused about the following: Humans need air/oxygen to breathe in order to live. Plants/trees/...
4
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1answer
80 views

Does photosynthesis begin instantly when a plant is exposed to light?

I'm curious to know if the process of photosynthesis has a "ramp-up" time to become useful to a plant, or if it begins instantaneously when the plant is exposed to light after a period of darkness. ...
1
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1answer
66 views

Is there term for thermophilic-halophilic plants and if so, what is it?

I know that in botany there is a wide classification for plants that can survive in hot deserts (semi-arid or arid) and harsh climates such as 4-season countries with a tendency to droughts each year (...
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0answers
59 views

Can anyone identify what is the name of this plant?

I found this plant on the side of the street in Melbourne, Australia. Looked like someone just removed it and threw it from their garden. So I took it home and planted it. The plant had damaged ...
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1answer
102 views

Why do guard cells open stomata when they are swelling?

As the concentration of potassium inside guard cells increases, water enters the cell by osmosis. But why does the swollen causes the stoma to open? Does it relate to the thickness of the cell wall? ...
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2answers
120 views

will a plant grow faster if it is exposed to concentrated sunlight?

I know that plant grow faster depending on the hours of sunlight it has, but what happens if i put a giant mirror focusing light to the plant?. Will the growth rate be limited by the damage the ...
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1answer
49 views

How to obtain raphides from plants?

I recently found out that certain plants produce needle-shaped crystals called raphides. I am a physicist and I have an experiment in mind that could use these needles, but I would need to extract ...
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0answers
42 views

What happens when you cook tree spinach with aluminum?

The Internet is filled with warnings that you shouldn't cook tree spinach(Cnidoscolus aconitifolius) in aluminum, because it will react and create toxins that cause explosive diarrhea when consumed. ...
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1answer
64 views

What does it mean for there to be no correlation between phylogenetic independent contrast?

I am testing the correlation between two physiological parameters in plants using the pic function in R. I am a bit stuck on the interpretation of the phylogenetic independent contrast (PIC). Without ...
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2answers
180 views

Can the word “Strain” be used to describe plants or is it used only for microorganisms?

I am trying to determine if I can use the word strain correctly as it is presented in the dictionary as "a variety of plant occurring naturally or developed by breeding" or should strain be used only ...
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1answer
193 views

Hollow stalks in celery

When cutting a section of a celery plant stalk it appeared hollow inside, i.e. the cortex was hollow and encircled by the cambium, the vascular bundles, some cortex and the epidermis layer, thus the ...
2
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1answer
118 views

Does the 'President' have 2 Billion Leaves?

The world's second-largest known tree, the President, in Sequoia National Park is 3200 years old and is said to have 2 billion leaves (Source: https://youtu.be/vNCH6uhB_Bs?t=59). Is this correct? And ...

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