The study of plant life; e.g. angiosperms, gymnosperms, bryophytes, pteridophytes, and algae.

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2
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0answers
18 views

Can anyone tell what kind of berry/currant this is?

I found this currant-like plant in Helsinki, Finland. It seems very similar to red currant but it has hairs on its fruits, and the fruits are pear-shaped. Can anyone please identify this plant? Many ...
3
votes
1answer
120 views

Why is the manchineel tree so poisonous?

The machineel tree is incredibly toxic to humans. What advantage could Hippomane mancinella have for being so poisonous? It's name even apparently translates to “little apple that makes horses mad”. ...
6
votes
1answer
52 views

What is this - nest, eggs, fungus?

Anyone know what these are? I found them in our local park today attached to a wooden earth-retaining wall.I was thinking some kind of insect nest/egg sac (spider?) They're about the size of a medium ...
6
votes
1answer
898 views

Why does wood become darker when it ages?

I have lots of pieces of pine furniture which have different colours depending on how old they are. So, I just wondered why that is. I guess it has something to do with structures and chemical ...
0
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0answers
30 views

what type of random sampling method commonly used to select trees in a forest [on hold]

I was wondering if you can help me what type of random sampling method used to select trees in a forest
4
votes
3answers
127 views

What type of tree is this?

This is a tree that I have been growing. I'm wondering if this is a mulberry, and if so, what kind? Location is Arizona.
0
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1answer
27 views

How to use Transect-based sampling to select sample trees [on hold]

I was wondering if you help me how to use Transect-based sampling to select sample trees
0
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2answers
476 views

What is Meriva Phytosome Curcumin?

What is Meriva Phytosome Curcumin other than being a food supplement? Is it a plant? A type of plant extract? I googled it but still couldn't figure out exactly what it is. The reason I'm asking is ...
0
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1answer
18 views

What is the name of the groove down the middle of an anther?

I thought it had a name along the lines of interlocular groove, but I haven't been able to find that term anywhere.
0
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0answers
26 views

why some are monocot and some dicot and some multicot? [closed]

I can understand that Cotyledons store food for embryo for future growth. But why some seeds are monocots and some seeds are dicots and some multicotyledonous(gymnosperms)? Can't they just manage ...
3
votes
3answers
70 views

Can plants grow without photosynthesis?

Animals can survive without eating if nutrition is injected directly into their blood. Can the equivalent be done with plants? By injecting carbohydrate rich nutrient solution, either without ...
1
vote
0answers
14 views

Why doesn't Poison Ivy cause a reaction under one's fingernails?

Okay, so I pulled up a bunch of Poison Ivy last week and I got itchy up and down my arms. I scratch and I think that causes the oil to spread causing more misery. However I notice that I don't get a ...
2
votes
1answer
77 views

What chemicals/substances exist in green capsicum (peppers) that do not exist in red capsicum?

I have known 3 people in my life that have incredibly adverse reactions (one called it an "allergy" and his symptoms did resemble such) to consuming any form of green pepper (capsicum) but have no ...
3
votes
1answer
37 views

What is the effect of temperature and carbon dioxide on the opening and closing of stomata?

I am teaching biology in an academy. The question which I had asked above had been raised by on of my students. I tried my level best to search out the answer to this question but I could not find the ...
1
vote
1answer
80 views

Alder Tree Root Nodule Origins?

I recently found out that alder trees have root nodules which contain nitrogen-fixing bacteria and that alders are primary colonizers in primary succession. That leads me to this question: since there ...
1
vote
1answer
51 views

How to measure the biomass of hydroponic plants in netpot/rockwool DWC system?

I'm doing an experiment with 4 kale plants, each in their own small deep water culture (DWC) system. Each plant was transplanted in rockwool with netpots and clay pebbles. But I need to periodically ...
2
votes
1answer
19 views

Relation between biomass and radius of roots system

Is there a known relation between the mass of a plant to the size of its roots? For example, can I take the root size to be proportional to the biomass of the plant like in this relation: $$R = R_0 (...
1
vote
1answer
45 views

Making a hole in a tree is okay? Or does it damages the tree?

I am watching a TV series named "Treehouse Masters." What they do is make houses on trees or around it getting physical support from a big strong tree, like this: But to make the support strong, ...
-1
votes
0answers
10 views

Question on my Bradford Pear Tree [migrated]

We have 2Bradford Pear trees out front,this spring the one on the right was full of Bloom's,the left one was very scarce of blooms, the right tree is full of leaves,the left one is almost bare. We are ...
0
votes
0answers
24 views

Are there any bacteria with a protective calcified ‘skeleton’?

Some algae like the coccolithophores form coccoliths which are individual plates of calcium carbonate. But are there also bacteria known that can make such a skeleton?
1
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1answer
39 views

Identify this plant from the Netherlands with big white flower

The picture was taken today in the Netherlands. Can you identify this plant species?
0
votes
0answers
19 views

What is the molecule responsible of the yellow color of the Agave americana?

Does anybody know what is the molecule responsible of the yellow color at the edges of this plant? I noticed also that the new forming yellow part at the begging stage is soft green until it is ...
14
votes
2answers
232 views

Why do pink rain lilies flower only after rains, and not from being watered?

We have pink rain lilies (Zephyranthes carinata) in the garden. In my personal experience, I've found that they always flower, without exception, shortly after rains. However, there are roughly ten ...
0
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0answers
43 views

“CO2 is plant food” - What is the actual effect of increased CO2 on plant growth?

A frequent talking point by global warming deniers is that CO2 in the atmosphere is actually beneficial because "CO2 is plant food". I'm a non biologist trying to figure out under what circumstances ...
11
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1answer
3k views

Why are some berries poisonous?

In my understanding, the evolutional function of berries is to be eaten and pood out somewhere else, so that the seeds of the plant spread. Is this so? Then why are some berries poisonous?
0
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0answers
12 views

Making tea out of grape leaves -when to pick the leaves? [migrated]

I have a question for you regarding make tea out of grape leaves. I want to make some, but don't know when the best time to pick the leaves it. I know it's made in Greece and the USA, too, but not in ...
0
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2answers
30 views

What is the genetic difference between two cone branches?

As we can see on this larch, male and female cones are sometimes directed to grow on the opposite side of the branch. We were told in school that this mechanism works against self-fertilization. Also ...
15
votes
3answers
5k views

Are there any motile plants?

There are numerous examples of sessile animals (sponges, barnacles etc.) but are there any examples of motile plants? If not, why not? Surely mobility would have conferred an evolutionary advantage to ...
3
votes
1answer
144 views

What's the (or some of the) minimum(s) amount of atmospheric carbon dioxide needed by plants?

We currently have a problem of increasing CO2 in the atmosphere. But assuming we find a way to carbon sink it, what is the minimum CO2 we need to leave in the atmosphere to provide a source for ...
2
votes
1answer
71 views

Species Identification: Bulbous root on plant, Southern California, USA

In Southern California, I was pulling out some roots and grasses and weeds in our backyard, and I noticed something weird. It appeared like there was a grape-sized bulb of something connected to one ...
2
votes
1answer
60 views

Difference between the P4 and P5 subtypes of P-type ATPases in plants

In plants there are various kinds of P-type ATPases. What is difference between P4-ATPase and P5-ATPase?
0
votes
0answers
16 views

How is the acetone method different from QB buffer for extraction of plant protein?

I primarily work on animal tissue but I thought of running an SDS-PAGE for plant tissue just for fun. I searched for some protein extraction protocols online and I don't know which one to choose. One ...
4
votes
2answers
117 views

Does a plant have to have leaves to produce fruit?

Is it possible that a plant can still produce fruit, even though it may not have leaves? Are there any plant species that can produce fruit without leaves?
0
votes
0answers
8 views

will 2,4 Dichlorophenoxy acetic acid be effective as an herbicide against banana and papaya

Since 2,4 D is effective against broad leaved weeds/plants, will it be effective in case of banana and papaya?
1
vote
1answer
96 views

Why do fruits have to ripen?

It seems like most fruits that we consume undergo some sort of ripening process either before or after they are picked from the vine, tree, etc. I understand that sugars are released during the ...
3
votes
1answer
48 views

Species Identification: Coniferous tree, Italy

I noticed it close to the place where I work, I live in Italy Could you tell me the complete name of this tree? Particular of the leaves
0
votes
0answers
11 views

Does alcohol affect water potential across a tonoplast? If so, would it cause it to explode or implode?

This was a question I saw in a biology exam I recently sat. I know it affects the r-groups of the transport proteins, causing them to change shape and become leaky, but does it also affect water ...
30
votes
1answer
2k views

Ripening bananas artificially: What is the biological reason

I am a resident of the tropical island of Sri Lanka, and we have a strange traditional method to ripen our banana harvest quickly. What we do is this: We dig a pit in earth that is enough to put the ...
1
vote
0answers
18 views

Do cortical cells in root have higher water potential than endodermal cell solution?Or is it the other way round?

Well, water normally passes from root hair cells to cortex to endodermis, and from there to the xylem vessels. All of this occurs down the water potential gradient by apoplastic or symplastic pathway ...
0
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0answers
14 views

What is Amphitropous ovule & what is Hemianatropous ovule? Got different answer from different sources

I have two books where they are saying just the opposite of what the internet websites saying. The two books are:- STUDIES IN BOTANY written by Mitra, Mitra, Chowdhury A TEXTBOOK OF BOTANY written ...
0
votes
0answers
20 views

What is the name for the mark on a fruit or vegetable where it connected to the main plant via the Peduncle/Pedicle?

When you pick a fruit or vegetable there is very often an obvious mark left on it from where it was attached to the Peduncle/Pedicle. I was wondering if this area has a name. It's clearly visible on ...
0
votes
1answer
19 views

Indoor plants acidic soil

I have a ponytail tree plant. The new growth look anemic, pale and thin. And several leave have browned from the midway to the ends of the leaves. The stem is woody and firm. Though it is in a solid ...
4
votes
1answer
63 views

What kind of kale is this?

I'm from Pennsylvania and I used to get this kale all the time at the grocery store, but I moved to the West Coast recently and can't find it anywhere! It looks exactly like this photo: Image source:...
2
votes
1answer
66 views

What is the name of this green plant with thin leaves?

I've seen this in Scotland between Balmaha and Inversnaid: A higher resolution is here: https://commons.wikimedia.org/wiki/File:Balmaha-Inversnaid-9.jpg What is the name of this green plant with ...
1
vote
1answer
51 views

Mangroves and desalination of sea water

I am not an expert but I guess that mangroves (or some other plants that thrive in sea water) perform some kind of desalination to extract fresh water from sea water. Is this true? If yes, What ...
3
votes
2answers
307 views

What is the name of this plant with small, 5-leaved divided pink blooms?

I found this in a forest in Karlsruhe (Germany). The blooms are pink and have 5 leaves. Each leave is divided into two parts. It is pink and has a diameter of about 1-2cm.
2
votes
0answers
41 views

Do trees have genes for stopping the grow?

Do trees have genetically encoded to stop growing at some height, to keep dividing the cells only to a certain amount, or to pump nutritions only till it's advantageous because they've already ...
8
votes
2answers
5k views

Why is it beneficial for trees to grow that tall?

Why is it beneficial for trees to grow that tall? This sounds like a kid's question Mom, Dad... why are trees so tall? Costs and Benefits There are some obvious ...
1
vote
0answers
25 views

What tell a plant to have one/a lot of flower(s)? [closed]

some plants just have one flower and some have more. This is the question. please simply tell me how? which genes or pathways control this in various plants?
2
votes
0answers
26 views

Banana cultivar identification

I found a cultivar of banana that I haven't seen before (and that was significantly different from the standard Cavendish cultivar) in a market in Hong Kong today, due to the language barrier (...