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

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12 views

What techniques can be used to link environmental conditions to crop yield?

Im interested in how we can determine what are the optimal conditions for crops and how deviations from these optimal conditions affect yield. In the literature I have found two main approaches and I ...
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0answers
9 views

How plants absorb water? [on hold]

I would like to know how plants absorb water for their roots. ( I mean the way they do it ).
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1answer
14 views

How do roots absorb water instead of presence of waxy - material suberin in the form of casparian strips on the wall of endodermis?

I found that in the endodermis, the tangential and radial walls have deposition of the waxy, and hence water-impermeable, material suberin in the form of casparian strips. The endodermis comes before ...
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2answers
25 views

How do plants get carbon?

How do plants get carbon? From air or soil? How is it different for aquatic plants and algae? According to https://en.wikipedia.org/wiki/Soil_organic_matter soil has 3.3 times the size of the ...
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0answers
11 views

Nicotine and plants [duplicate]

I hear that nicotine, produced by Nicotiana tabacum, is poisonous to the plant itself, which is why it accumulates the nicotine in the central cell vacuole. If so, why is nicotine produced in the ...
-3
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0answers
20 views

Why plants can not photosynthesize in presence of artificial light? [duplicate]

Why can't plants photosynthesize under artificial light? It is said that plants show max rate of photosynthesis under blue light . So if we provide artificial blue light why can't the photosynthesize? ...
2
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0answers
10 views

Do ginko trees grow well in Eastern North America (specifically Ontario,Canada)

I have recently noticed many Ginko (Ginko biloba) saplings planted in my Eastern Ontario city (in Canada), and they are looking a bit sickly, with yellow leaves. They seem to be a popular choice in ...
2
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1answer
28 views

Questions about a fossil

I have a plant fossil that my dad once found for me at a beach in Denmark, Europe about 15 years ago. Is it possible to identify what kind of plant it is? There is a fossil water bubble suggesting ...
0
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1answer
24 views

What kind of tree is this?

I live in Denmark, Europe and was going for a walk on a beautiful cemetary in the city. I saw this tree and would like to know what species it is. Unfortunately i have no photos of the tree from a ...
2
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1answer
35 views

Can anyone identify this plant from Bangladesh?

I have taken the picture from an agriculture university in Bangladesh.
3
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2answers
46 views

Can anyone ID this flower plant by the photo?

Can someone identify this plant? It has big red flowers when it flowers! Not sure if it is native, but it is in my grandmothers garden in Vancouver, British Columbia, Canada.
3
votes
0answers
23 views

Cause-and-effect questions about growth and development of plant

I need to solve some cause-and-effect problems. The problems are related to growth and development of plant. "Growth and Development" chapter is the first chapter in third level of high school (senior ...
7
votes
1answer
58 views

How do plants benefit from their seeds being buried?

Common planting advice, when starting many plants from seed, is to bury the seed some small distance under the soil. It seems like most plants (at least members of class Dicotyledonae) will grow a ...
4
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1answer
62 views

Fruit-bearing tree identification

Just moved into a new house in Puerto Rico and I found this tree in the back garden. Can anyone tell me what tree this is, and whether its fruit is edible?
4
votes
1answer
35 views

Do you know what plant it is?

I saw this plant when I was on my trip to the Ukraine. I wonder if those berries are edible. Thanks a lot in advance.
30
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4answers
6k views

Why would a plant evolve to produce an addictive chemical?

It seems kind of anti-productive in terms of survival for a plant to produce an addictive chemical as that plant will constantly be sought after by animals that ingest it. In this instance, I'm ...
3
votes
0answers
35 views

What Chemical Trigger Causes Ectomycorrhiza To Change From Asexual To Sexual?

I am searching for the catalyst behind the change of asexual to sexual ectomycorrhiza when symbiosis with a tree root is formed. As ectomycorrhiza attaches itself to a root, they form a relationship ...
5
votes
1answer
58 views

What is the name of this flower?

A flower has grown on a leaf in our garden. What is the name of this flower? Give some description.
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1answer
42 views

Possible calculations with temperature, humidity, images and VIS spectrum of a plant in an Integrating sphere

I am currently working on a project which involves growing some plants in a integrating sphere made of foam. I have added temperature, humidity and soil moisture sensors as well as a Spectrometer (350 ...
2
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0answers
41 views

What is this flower?

I was in Germany recently, and I saw again a flower that I'd only ever encountered before at Meijer Gardens. It's interesting to me because I'd never seen a flower with color variation in only the ...
-2
votes
1answer
32 views

Why do tomatoes look so much like pomegranates? [closed]

The pomegranate fruit has been cultivated since ancient times, particularly in the Middle East and the Mediterranean. It has a hard outer rind, and inside are several chambers, each of which contains ...
5
votes
2answers
95 views

Is this Heracleum sosnowskyi?

There's a relatively big scare in local news about the Heracleum sosnowskyi plant, considering how dangerous it can be. I was strolling through the park when I noticed these plants - the ones I ...
7
votes
1answer
77 views

Flower identification: Moscow, Russia

I found this plant near the MSU, Moscow, Russia. Could someone help me to identify it?
3
votes
1answer
50 views

Which plant is this?

I'm curious what plant this is! I found it at 37°52'23.2"N 122°16'55.3"W (north of Oakland, California, USA).
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2answers
54 views

Can someone identify this stinging plant?

I have no idea where this plant came from, or what it is. What I do know is its leaves are covered in little hairs, there's little thorns growing all over it, and just by rubbing its leaf it burns you ...
7
votes
3answers
1k views

Why are plants referred to by their Latin species names, and not by their popular names?

Often the names of herbal ingredients in certain cosmetics products are given by their scientific names like Anthemis nobilis instead of chamomile or Lavandula angustifolia instead of lavender. Is ...
5
votes
1answer
333 views

What flowering green plant is this?

I got this green plant as a gift many years ago, but I have never seen it flower before. It has a strong, pleasant scent and cool flowers so I'd really would like to know what it is.
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1answer
39 views

Can roots have cuticle, especially aerial roots?

In my school biology book, it is written that cuticle covers the epidermal cells in aerial parts of plants and root epidermis doesn't have cuticle. My question is that whether aerial roots, in plants ...
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0answers
25 views

Which taxonomic classification schemes are most accepted?

Since the taxonomic classification schemes followed by universities around the world are different I wish to know which are the most accepted classification schemes till date concerning the following ...
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0answers
38 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 ...
23
votes
1answer
3k views

What is it that creates that wonderful smell after a fresh rain?

I've heard that the wonderful smell of a fresh rain is actually chemicals released from the trees and grass and other plants. What is the process that allows these chemicals to be released? What ...
6
votes
1answer
120 views

What is the scientific name of this evergreen plant?

This plant is found in India. It is an evergreen plant. Would love to know the scientific name.
5
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2answers
118 views

How do researchers map root systems of plants?

For example, here is a picture of the root systems for some prairie grasses: (Click image for higher-resolution PDF) from: http://www.conservationresearchinstitute.org/educational-offerings.html How ...
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0answers
26 views

Calculating the canopy size (crown) of a newly planted tree at a future date

Assuming that one knows the maximum area of the canopy and the age of the tree when it achieves this. And given an initial canopy size from the nursery. How would I calculate the canopy size at a ...
43
votes
1answer
3k views

What could cause a forest of bent trees?

While hiking on the northern Idaho-Montana border, I encountered a large area where virtually every tree is bent at the base in the downhill direction. Only the very largest and very smallest trees ...
7
votes
1answer
89 views

Plant identification in Turkey

What species is this ? It is a stinky, hairy plant. I have found it nearby a river. It had reached a height of 1 meter. Bloomed three weeks ago. Found in Turkey.
2
votes
1answer
83 views

What biological processes can affect the temperature of the shadow a tree casts?

Assuming two trees have similar shape and leaf coverage, could differences in the biological processes among them lead to differences in the temperature of the shadow they cast? What biological ...
4
votes
1answer
225 views

Can anyone help me identify this plant?

I have a Chamaerops humilis in my apartment and in there is these small plants growing. I live in Denmark, Europe and my palm tree has only been inside my apartment since i got it. Can anyone ...
3
votes
1answer
44 views

Plant identification

What plant species is this? Its stalk looks like a grapevine, but the leaves & flowers not. It bloomed this week (Mid-June). I have found it in Turkey, Amasya. If you want, I can add more ...
2
votes
1answer
40 views

What comes out of this bump in this vegetable?

I live in Denmark, Europe and I have in my garden this gigantic vegetable. It has a big bump on the top and i was wondering about what comes out of it?
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1answer
128 views

Is Araucaria fruit toxic? [closed]

I've had an Araucaria tree in my garden for more than 30 years. Today a fruit fell off the tree. It looks just like this one: I want to know if it is toxic? Can I eat it? If so, how?
3
votes
1answer
114 views

Cause of Crease in Drupe Fruit

What causes the crease through the pericarp of a drupe fruit (peach, nectarine, olive)? It may just be in exocarp as @Ilan pointed out, but I assumed (perhaps wrongly), that the division continued ...
5
votes
1answer
66 views

Are there terrestrial plants that thrive on sea water?

Given the existence of coastal deserts such as in the picture below, I was wondering whether terrestrial plants can survive on sea water alone? If yes, why then do coastal deserts exist, instead of ...
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vote
1answer
49 views

Leaves growing on a leaf of a Begonia

I've a Begonia species. Somehow it started to grow new leaves on top and right in the center of an existing leaf which you can see in the center of the image. Why is it doing this? Apparently it is ...
3
votes
0answers
31 views

Expected reproduction rate of a dandelion and/or fern

I am working a basic mathematical/computer simulation of an ecosystem, and I need to know the birth rate of each organism in my simulation. However, I could not find any data for how often a small, ...
4
votes
1answer
69 views

Identify the plant

Can anyone tell me which plant or flower is this. I have found it in Darjeeling, West Bengal, India.
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0answers
27 views

Can photosyntetic cells be genetically modified to grow at a faster rate?

I hope the question is not silly, but I wonder if a sort of genetically modified plant "cancer" could be used for carbon sequestration. For example, cancer cells like HeLa have been reproduced in ...
6
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0answers
43 views

What bacteria shed harvestable energy from root zone organic matter?

I recently heard of a successful effort that harvests energy from soil at plants' bases due to apparently bacterial breakdown of wastes from the plants: Via photosynthesis a plant produces organic ...
2
votes
1answer
65 views

What is this plant on the photos?

Found in Kustaankartano, Helsinki, Finland in June 2015. (for closeup view, copy image URL and open in new window and then zoom in)
3
votes
0answers
50 views

Mating types in fungi (and somatogamy)

I would have some related questions about the mating types of fungi. Does a single spore generate a mycelium possessing only one mating type? If it does not in general, do Ascomycota and ...