Questions tagged [botany]

The study of plants and plant life.

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0answers
28 views

What is the invisible substance from bananas (material or chemical) that persists on the hands even after washing?

I've been having a particular sensation, and I don't think it's harmful, but I am curious as to the cause. I could not find anything on the internet, but it's possible I just didn't know the right ...
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2answers
52 views

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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What is this plant/fungus attached to the terrarium?

I have a terrarium with something in black color attached to the glass with a whitish green stem. Can someone please help identifying this? Terrarium internal side: Terrarium external side:
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Can Agrobacterium tumefaciens transfer multiple T-DNA segments at once?

Is it possible for Agrobacterium to transfer two T-DNA segments to a plant from two different binary vectors within the cell?
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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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Are all of these images drawings of phytoplankton?

I came across the work of Ernst Haeckel and found all these beautiful drawings: drawing 1 drawing 2 drawing 3 drawing 4 drawing 5 My question is: are all of these drawings representing phytoplankton?...
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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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What If question relating to discovery of viruses (Beijerinck TMD experiment)

I was reading about viruses in Campbell and there was a What If question about Beijerinck's TMD experiment. If Beijerinck had observed that the infection of each group was weaker than that of the ...
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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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34 views

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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1answer
24 views

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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25 views

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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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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42 views

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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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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1answer
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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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33 views

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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1answer
35 views

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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56 views

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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29 views

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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2answers
55 views

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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Can plants grow healthily being watered in either deionized or distilled water? [closed]

I want to use deionized/distilled water to water plants from some. I have the choice whether to use tap water, deionized water or distilled water that come from a closed system that has a water cycle, ...
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Saving a Maize Landrace from Inbreeding Depression

I have 10 seeds of a rare corn landrace. I probably won't be able to acquire more and the cultigen's long term fate is unknown. So, I want to do my best to preserve it for future generations. Corn is ...
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1answer
56 views

What morphological traits can be used to diagnose members of the Eucalypteae?

I read the Wikipedia article on Eucalypteae and it doesn't actually say what these plants have in common. (I am now reading through https://bsapubs.onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.1200025 ...
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1answer
87 views

If stomata is closed at night ,how does exchange of oxygen take place at night? [closed]

In this article in the second paragraph, it is written that the stomata remains closed at night to reduce water loss. We know that the plants respire and take in oxygen at night. Then how do plants ...
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1answer
647 views

Identity of plant bearing a cluster of bulbous, glossy red fruits (Oak Ridges Moraine)

Location: Oak Ridges Moraine, Ontario (Durham Region) Date: October 4, 2021 Site: Full shade; hillside; sugar bush
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1answer
64 views

How do plants know to grow towards the light? [closed]

Plants lack a central nervous system. How do they know to drop leaves in full shade and to curve stems towards the current light source?
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Are all fibrous roots considered as adventitious roots?

I have just started studying about morphology of angiosperms. I'm learning about roots right now and I came across the following: In monocots, adventitious roots are a characteristic feature whereas ...
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1answer
68 views

What are the oldest living plants in the world today? What can you know about them? Why can some plants live so long? [closed]

What are the oldest living plants in the world today? What can you know about them? Why can some plants live so long?
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495 views

How to decipher references in natural history works of the late Renaissance and early Modernity?

Old botany books from the 17th, 18th and 19th centuries (and maybe also some later ones ?) enumerating lists of species use to give references to their own sources as abbreviations of one or few ...
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Does the generative cell have centrioles?

I have read that most plant cells lack centrioles, though it may be seen in some lower plants. But what about the gametophyte of higher plants, angiosperms specifically? As this diagram shows- The ...
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1answer
64 views

Are there any natural forms of aquatic vegetation which do not stand up in water?

We are carrying out some experiments where we study influence of underwater vegetation on waves. Unfortunately, the stalks of artificial 'vegetation' which we have seem to be too dense (or too stiff). ...
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60 views

What is this bright green spot inside an apple?

I bought four Gala apples at a produce store. When I sliced them with a stainless steel knife, a fresh knife for each apple, after the third slice they each revealed a bright green spot. In the apple ...
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Why is the author citation of Polypodium porosum (C. Presl) Mett.?

I would like to understand what constitutes a valid taxonomic description of a species in botany and by chance I encountered this example (which I otherwise know nothing about). Either Pyrrosia porosa ...
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Does Ethylene Triple response provide any advantage to the Arabidopsis thaliana Etiloated seedling,?

As ethylene has a triple response effect on Arabidopsis thaliana Etiloated seedling- 1 Shortening and thickening of Hypocotyl 2 Exaggerated apical hook 3 Short root According to this site Ethylene ...
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21 views

Why Plants growth has a significant contribution of cell elongation growth?

Plant Growth is characterised by three phases- Cell division , Cell elongation and Cell maturation, where Maturation is just specilisation of cells, Only major contributory effect in growth is of cell ...
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101 views

Is lignification within plants a reversible process? If so which factors can reverse lignification?

Lignification is an important process in plants such as trees to allow for structural rigidity. Is this process reversible by the plant and if so which factors influence this reversibility?
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1answer
65 views

Strange yellow flower in shrub Species ID

This is a perennial plant photo taken in Bhubaneswar, Odisha, but I have seen the same plant in Andhra Pradesh as well. It's not exactly woody like a tree, but pretty large shrub [taller than me]. ...
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23 views

How it happened that in cactuses the difference between the fruit, the leaf and the stem so much blurred if they were normal plants in the past?

Looking at a cactus may make impression that they evolved separately from other plants, which usually have stem, leaf and fruit. But the fruit in cactuses has the same structure and surface as the ...
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1answer
127 views

What is the botanical definition of a tree?

I recently saw a shared post on Facebook which states Trees - even a young child knows what a Tree is, however there is surprisingly no universally recognised precise definition of what a tree is, ...
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1answer
65 views

Identification of a plant

Please help me to identify this plant The plants can be found on italian balconies and I would like to buy one, but I do not know what I should look for. The habit of the plant is trailing.
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25 views

Pink and white flower species ID

I found these small plants growing after the rains in July .In Bhubaneswar , India. What species is it?
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1answer
35 views

Tiny deep red flower shrub species ID

I found this plant with maple like leaves blooming after rains this july.I am in Bhubaneswar,India.
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Flowering climber species ID in Odisha

I found this pink climber on a tree , in Bhubaneswar,India. It started blooming around july .
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1answer
55 views

Can you please help me identifying these parasite (eggs?) on rose?

My aunt today saw the following objects on roses in her garden and asked what it is but nobody could tell her yet, but it seems to be some kind of parasite or some caterpillar eggs. As you can see, ...
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1answer
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Can anyone identify this seed, pit, or nut?

I found this on the recessed top of the intake manifold of my car engine. It may have been there for weeks. It was likely brought there by a rat or squirrel who was unable to chew through the outer ...

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