Questions tagged [botany]

The study of plants and plant life.

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Urushiol sensitivity in trees

I have seen a bumpy, rash-like occurence, similar to the rash in humans, on many trees overgrown with poison ivy. I have read that poison ivy gall mites cause a red rash on the leaves of poison ivy ...
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Photolysis of water

Photolysis of water releases $\text{O}_2$, $\text{H}^+$ ions and $\text{e}^-$. $\text{Mn}$ in the $\text{O}_2$ evolving complex also produces $\text{e}^-$. What provides $\text{e}^-$ to P680:$\text{Mn}...
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Why are so many fruits spherically shaped?

Why are most of the fruits that we eat, i.e. apples, cherries, oranges etc, generally spherical?
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3 votes
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Could water soluble dyes be directly absorbed by a plant's / tree's xylem?

Amateur woodworker / hobbyist here, I enjoy using colorful or exotic wood species, the issue is that many of these species are rare, expensive, endangered, hard to grow, or otherwise difficult to ...
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Coniferous tree with alternating bunches of short needles (Toronto area)

What species of tree is this? Location: East of Toronto, zone 6; urban Date of photos: May 10, 2022 Diameter at breast height: ~18 inches Height: ~30 ft
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Maximum solar irradiance per plant species

I'm looking for a table or database specifying by plant species, the maximum solar irradiance it can tolerate, but seems not a straightforward search on most engines or open access botany databases. ...
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Can all plants be reproduced through vegetative propagation?

I have learned that plants can be reproduced or propagated through vegetative parts but there is a question in my mind if we can each method for all types of plants. I don't know if all plants have ...
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16 votes
1 answer
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This looks like it was somebody’s home - but who?

Found this near the edge of a forest in upstate New York. It looks like the remnant of a cocoon of some kind. I would appreciate any help in identifying its original maker / occupant. I hope my ...
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Shape of the first leaves of a plant

I am quite unfamiliar with everything that is in the slightest related to biology, so I am very sorry if this question does not meet your standards and is too basic. Lately I am quite enjoying growing ...
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Where does the silica found on grass and other plants come from?

Grass has tiny silica "teeth" on it called phytoliths: I have trouble understanding how can a plant possibly extract silica from soil and form anything out of it. Silicon oxide is used for ...
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What is evolutionary advantage of Spirogyra to be multicell?

Spirogyra is just a set of cells connected to each other; it has no leaves, roots, etc... It even doesn't have multiple layers of cells like Hydra. So what is evolutionary advantage for Spirogyra ...
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Is it scientifically sound to pool repeated measurements?

I am measuring specific phenolic compounds in leaves of A. thaliana. I have many different varieties, and different treatments. Initially I was measuring one leaf per plant for three plants for each ...
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Is it safe to water my plants with diluted Trisodium Phosphate (TSP)? [migrated]

I occasionally use TSP (Sodium Triphosphate) to degrease and clean mechanical parts for restoration work. It's very effective, but I'm a bit concerned about dumping the resulting waste solution down ...
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scientific reasons behind a a sudden yet temporary growth sprout of the plant when the soil has No depth?

Sorry, I'm kind of naive when it comes to plant biology. Mark 4:5-6( New American Standard Bible 1995 ) 5 Other seed fell on the rocky ground where it did not have much soil; and immediately it ...
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1 answer
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Species identification: plant with pitfall trap-like structures

I found this plant in Tuscany (Italy, mediterranean climate, about 60 m above mean sea level). Photos were taken at roughly the beginning of spring after a period of drought followed by a couple days ...
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Do plants digest substances they ingest?

I was thinking about plants having no digestion system (is that true at all?) and my conclusion was that they only ingest substances that they can use like that or that they can transform into usable ...
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1 answer
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What kind of tree has leaves like this?

Shot taken in Spring, on May 22, 2020 in a forest in Haliburton, Ontario.
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What kind of yellow flower is this?

Shot in a garden in Haliburton, Ontario, Canada on August 6th, 2020. Flowerhead size approx. 3" diameter across.
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Selective herbicides

There are several herbicides available that claim to kill lawn weeds but not the lawn grass. This seems amazing, to me. How does this work? How can a chemical be lethal to a broad range of plants, but ...
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What is this small white insect on my plants?

Environment I have a large amount of plants in an old industrial loft apartment. I live in Rochester, New York. I ship plants in from across the US, often exotic ones. Observations A few months ago, I ...
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What characteristics identify modified 'plant parts' as the respective 'plant parts'?

I was learning about different modifications in plant parts such as modified leaves, stems and roots from my Biology textbook. Modified parts differ as they are modified for different functions. For ...
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2 votes
1 answer
103 views

Why are some plants naturally yellow?

Some plants are naturally yellow. Or rather, they have yellow leaves. This is shown in the following picture, taken from my neighborhood. I found a Quora article that explains why, but since that is ...
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Do some plant proteins have no domains?

I've always been under the impression that all proteins consist of at least one domain (with the exception of intrinsically disordered proteins). However, I've come across some things which challenge ...
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Rapid generation advancement in Maize breeding

Maize (Zea mays L.) is one of the important crops and its acreage is increasing considerably especially in Asia and Africa. The common production system in tropical and subtropical climates is rain-...
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5 votes
1 answer
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What kind of purple flower is this?

Shot in a garden in Haliburton, Ontario, Canada on June 18th, 2020. Flowerhead size approx. 1 1/4" diameter across.
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What kind of deciduous tree is this?

This image was captured on October 10th, 2020 in Haliburton, Ontario, Canada. Any help identifying the tree species is greatly appreciated. Rob.
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How much sunlight is required for photosynthesis to peak?

I've read that photosynthesis peaks at some point over light intensities https://en.wikipedia.org/wiki/PI_curve According to https://www.bbc.co.uk/bitesize/guides/z9pjrwx/revision/5 suggests At very ...
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Is ovule meristematic or parenchymatous?

Our teacher has told us that ovule is a mass of meristematic tissue but he also mantioned later that nucellus is a Mass of parenchymatous tissue that forms body of ovule so what is the true nature of ...
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1 vote
1 answer
111 views

Why do plants flap their leaves?

Simple question really, I have a plant, that I'm not sure of the species. Every few days I watch its leaves droop (which scares me because I worry the plant has died), but then a few days later I find ...
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1 vote
2 answers
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Seed head Identification. July in Toronto, Ontario, Canada

What flower has this type of seed head? (this was shot on July 17th, 2020) This was in a residential garden in Toronto. Going from memory, i believe the size was approx. 2 1/2" to 3" in ...
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3 votes
1 answer
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What is this mushroom attached to the terrarium with transparent cap and black strips?

I have a terrarium with something black attached to the glass with a whitish green stem. Can someone please help identifying this? The terrarium is outside in the backyard and receives only direct ...
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why can you avoid onions making you cry either by protecting you eyes or your breath?

i was wandering why onion makes me cry when i'm cutting them, so i tried three different things : first i tried cutting onions with swimming glasses, and it worked (i didn't cry) then i tried ...
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Does Thymoquinone give cedar its distinctive smell?

What chemical gives cedar wood its distinctive smell? Is it the same that gives Nigella sativa its cedar-like smell? Schreiner, Linda et al., “What Does Wood Smell like? Characterization of Odorants ...
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Why do some hard-shelled seeds need hot water in order to germinate, when planted artificially?

Some plant species, such as Mimosa pudica, have hard-shelled seeds. I have tried to plant them from seeds a few times in my life, in Hong Kong. I know that what follows is just an anecdote, but I hope ...
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Hydrostatic pressures in xylem transport

Plant transport has always been a confusing area for me especially when pressure potential is being discussed. How is the plant creating the negative fluid pressure at the top of the plant and why is ...
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3 votes
1 answer
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How should I measure the oxygen dispersed during photosynthesis in pondweeds?

I am to conduct a lab investigating how different wavelengths of light affects photosynthesis in Egeria pondweeds. The idea is to put color filters on light bulbs and shine them on the pondweed in a ...
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Scientific word for organisms that can regrow themselves

Is there any term for living organisms or more specifically animals that can regrow a whole from small components (assuming sufficient quantity of cells or specific organs are present)? For example - ...
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How does sea plants undergoes photosynthesis?

Since most of them do not have the chloroplast. And if they undergo how do they perform it ( thus the light stage)
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1 vote
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Were fall foliage leaf colors in Canada also delayed in autumn 2021?

English is not my first language. I didn't fully grok this National Geographic article published November 24 2021 by Sarah Gibbens. But it discusses just the eastern U.S.A., NOT Canada. How ever what ...
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What plant species generate the highest amount of bioelectricity?

I just want to ask which plant species produces a high amount of electricity. I'm very confused with the units that's why I don't know which species produce the highest amount of electricity. Also, ...
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3 votes
0 answers
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Can hydroponically grown plants selectively uptake nutrients, or return excess water?

If a plant is growing with the roots in the water but the rest of the plant above water, does that plant have to absorb all of the nutrients in the ratio that they exist in the water or can it absorb ...
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Why does xylem and phloem "reverse" between the stem and leaves?

Why does xylem and phloem change places (in the stem they are located in the interior, while in the leaves they are located on the exterior of the vascular bundle) ?
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In this aquponic tank, what are these three plants and could they be killing my beta fish?

I have a small aquaponic fish tank. In the tank there are two unknown types of water plants from a local pet store and the top there are three air plants from a local garden center. This tank was ...
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-1 votes
2 answers
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Do plants originate from a single cell

I read the generalization that life originates from a cell, and from my understanding animals, they originate from a single cell, produced as a result of sexual reproduction. And then life begins to ...
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Is there a database of plants chemical contents?

A database where given the name of plants, one can know the molecules it contains.
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-1 votes
1 answer
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Nastic movements in Insectivorous plants

Questions: What type of plant movement is shown by each of Sundew, Venus Flytrap and Pitcher Plant? What is the mechanism of the movement? Can a movement be both Chemonastic and Thigmonastic? If yes, ...
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2 votes
0 answers
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Could a tree grow in a low pressure environment?

Could a tree grow in a low pressure environment? If you had a pressure say, 10% of that of Sea level could a tree grow if it was in the proper soil and watered regularly?
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How do tall trees transport water at night?

I was studying transportation in plants and I came across two ways in which plants transport water. The first one is root pressure. In this method, epiblema cells of root hairs actively absorb ...
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1 vote
2 answers
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What is this plant (see the photo)?

EDIT: Found in Asia, China, latitude ~25 degree. Size about several centimeters. I wonder what this plant is? It looks quite unlike the plants we see everyday. I have tried photo search engines and ...
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What is silicalemma and what is plasmalemma in diatom algae and how do they differ?

I try to understant the morphology (cytology?) of diatom algae. Does someone can describe what is silicalemma and what is plasmalemma in diatoms and how do they differ? Or they are the same?
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