Questions tagged [botany]

The study of plants and plant life.

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0answers
21 views

Need clearcut answer in the n2 fixation [closed]

Is N2 fixation is done by autotropic or hetrotropic bacteria?
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1answer
25 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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13 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
19 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 ...
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25 views

Probability of horizontal gene transfer in grafted food plants

Last year I tried to graft a few tomato branches on a chili (Capsicum) plant. While it didn't work (the tomato branches died), I collected seeds from a few chili fruits of the same chili plant and ...
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1answer
46 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 ...
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1answer
16 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 ...
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0answers
25 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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16 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 ...
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1answer
138 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 ...
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64 views

Is there a species (or sub-species if one needs further precision) of a plant, that can thrive in total darkness?

I would like to buy indoor plants to put them in a room which usually have a very low amount of natural and/or artificial light. I understand that such indoor plants are usually low-height (up to 1 ...
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10answers
11k 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/...
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34 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. ...
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1answer
45 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
55 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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0answers
46 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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20 views

Different types of starch

Why do chloroplasts have transitory starch, amyloplasts - storage starch, but not the opposite? Why do plants use only starch from chloroplasts in the night?
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2answers
63 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
35 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
32 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
53 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
115 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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0answers
22 views

How does wall pressure oppose osmotic pressure?

This question is based on the equation: Diffusion Pressure Deficit= Osmotic Pressure - Wall pressure I know that wall pressure is directed towards the protoplasm. I need to make sure if osmotic ...
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1answer
121 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 ...
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1answer
106 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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19 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
53 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
42 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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0answers
20 views

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
37 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
65 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
94 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
52 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
64 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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0answers
23 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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20 views

Book recommendations on the evolution of trees

Trees have been around for hundreds of millions of years, since the first "true wood" evolved during the Devonian period ~400M years ago. This means we have fossilized wood in the form of tree ferns, ...
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9 views

Alternative method for starch detection but Lugol Test

I was wondering whether there were some other ways to detect starch presence in leaves but exposing them to an iodine solution, (Lugol Test). This test is the only technique I managed to find about.
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1answer
74 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 ...
2
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1answer
44 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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16 views

Which cultivated plant produce most pollen 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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2answers
76 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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0answers
16 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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18 views

Plant hybridization - cross clade cross pollination possibility

Is it possible for monocots, like dates, to cross-pollinate with eudicots, such as olives? What is the general rule for how closely related species must be to form hybrids organically?
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21 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
72 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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0answers
43 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
101 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
45 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
75 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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