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

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139 views

A source for leaf architecture of different plant species/genus?

I'm currently working on extracting some features of the leaf architecture based on their images (like L:W ratio, laminar shape, ...). I use the Manual of Leaf Architecture as the reference. It is ...
2
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1answer
122 views

List of species recently found of economic value

Is there a website or organization cataloging lists of biological species to have been recently found of great economic value? For example, a plant that wasn't of economic relevance a while ago but ...
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1answer
276 views

Why does freshly cut grass smell like a watermelon?

I found that, when I smell watermelon aroma outdoors, someone nearby has mowed the grass. Is there an underlying basis?
2
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1answer
87 views

What kind of mushroom(?) is this?

I found groups of these growing in the Lassen National Forest (Susanville, CA, USA). It looks like some sort of mushroom. I have Googled extensively, but can't seem to find a match.
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1answer
48 views

How many plants are needed to survive in an airtight chamber?

How large a garden do you need if you are to survive on them producing enough oxygen in a closed chamber? And which are the most effective plants?
2
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2answers
380 views

What evolutionary adaptations cause trees to grow tall?

I think there are some obvious costs for trees to grow tall. Carbon and other nutrients costs, maintenance cost, energy cost (for growing, to bring water (and nutrients) up to the higher leaves, ...
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1answer
55 views

Aside from cockroaches and other insects, which species (of all kinds) are 'immune' to ionizing radiation?

I have just been reading this excellent question and answer about cockroaches ability to withstand ionizing radiation. My question is an extension of that question: aside from insects, which other ...
2
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1answer
69 views

Do plant-plant interactions inhibit growth?

Plants produce lots of compounds that inhibit (kill or irritate) microorganisms and insects. They have defenses against plant viruses and infections. What kinds of compounds or hormones to plants ...
2
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1answer
150 views

How do fully dioecious plants determine sex?

I know that a minority of plants are fully dioecious, with adult plants producing either only male or only female flowers. When is this sexual differentiation determined? Is the seed of such a plant ...
2
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1answer
74 views

Is Hypericum Perforatum (St. John's wort) a C3 or C4 plant?

I've been curious as to which photosynthetic cycle St. John's wort uses to synthesise glucose and more complex carbohydrates. I know it probably won't be the crassulacean acid metabolism (CAM) cycle ...
2
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1answer
56 views

Is it ok for Chili pepper plant's fruits to fall into its soil?

I wonder if Chili pepper's fruits which fall into the soil near the plant will harm it, since the peppers are so spicy for people.
2
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1answer
51 views

Is light required for seed germination?

Is light required for germination of every seed? If not, why don't some plants require it? Is there any difference in the quality and duration of light required ? It would be interesting if someone ...
2
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1answer
105 views

Independence of Light independent reaction in photosynthesis?

Inspired by a question asked to me by a classmate, I have the following question about Light-independent (dark phase) reactions in photosynthesis:- Let us suppose an algae sample was exposed to ...
2
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1answer
55 views

Can a plant be programmed to produce any arbitrary object?

I'm wondering if a plant can be programmed (by modifying its genes) to grow into any shape that it's programming instructs. I understand that a plants genes are its instructions of how to convert the ...
2
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2answers
68 views

Tree census data for Sweden/Scandinavia?

Is anyone aware of any attempts to count or approximate the number of trees there are in Sweden or Scandinavia? I have a small popular science side project for which this would be useful
2
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2answers
158 views

Change in conditions of an ecosystem lead to change in organisms

Let's think about the slash and burn method and its effects on the ecosystem. Cutting down trees that rise all the way up to the canopy would expose the plants at ground level to more light, so would ...
2
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1answer
100 views

Photosynthesis - Light Intensity

Say I was conducting an experiment for photosynthesis. If I moved light closer to the plant, what effect would this have on the process of photosynthesis?
2
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1answer
158 views

Why do the sick and unhealthy trees leaf out first in spring?

It's spring. The time of year that trees start to leaf out. I have been watching them, and noticed an interesting pattern. The unhealthy trees of a species leafs out first. I've noticed this ...
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0answers
29 views

Embryo activity during seed dormancy?

What metabolic processes does a dormant embryo in a seed carry out? The newly produced seed will not germinate, either because of a lack of favourable conditions, seed hibernation, or because of a ...
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0answers
24 views

Why is this dry pepper fruit still “powered”?

Check out this photo of my pepper plant this cloudy morning: (click for full res) Usually (and this can be seen on 2 and a half of the 4 fruits in this pic) the fruits are "disconnected" from the ...
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1answer
94 views

What is this awesome plant, which can close its leaves when touched?

I came across this video on Facebook where a plant closes its leaves when touched. Unfortunately the video does not mention the name of this awesome plant. What's the name of this plant, and where ...
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2answers
94 views

Will climate change affect flower population?

There is a flower population elevated 1000 meters above sea level. If climate change causes a 12 degree C increase in temperature over the next 10 years, what will happen to the flowers?
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1answer
449 views

Why do plants have pith and how is it useful to them?

Many plants have pith, from walnut trees to corn to ragweed, but I can't think of anything it does them. What is pith and how is it useful to them?
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1answer
87 views

Is chlorophyll living or non living?

Is chlorophyll living or non living, and after boiling the water out of a chlorophyll extract would it still live, as in would it still maintain its properties after re-adding liquid to the dried ...
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1answer
79 views

Do non-green flower colors have any functional interactions with the sun?

I always hear the pseudo-evolutionary claim "plants are green because they need to use red and blue light". If this premise to my question is true, What (if any) other functional relationship occur ...
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1answer
31 views

What happens when seeds are refrigerated before planting?

My son is doing a science research project at school, and he's chosen to research what happens when seeds are refrigerated before planting. I cannot provide any information in regards to background ...
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1answer
20 views

How can a YAC be screened against a cDNA library and a cosmid library of genomic DNA to find a gene?

I am reading fw2.2: A Quantitative Trait Locus Key to the Evolution of Tomato Fruit Size (doi: 10.1126/science.289.5476.85). The authors are trying to find the gene that makes tomatoes bigger. As far ...
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1answer
53 views

What is this plant?

I really like this plant--I'm just wondering what its name is (perhaps genus+species). I think this plant grows in the tropical rainforest in Malaysia. Any suggestions? Thanks!
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1answer
36 views

Botany related question: liverwort sporophyte

Is perianth part of the sporophyte or gametophyte in liverworts (Marchantiophyta)?
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1answer
30 views

Artificial Propagation and it's relation to asexual reproduction

I know that asexual reproduction is also called vegetative reproduction. However I do not understand it's relation to artificial propagation. Is it a technique used for asexual reproduction (the ...
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1answer
119 views

Raphide toxicity in Pothos plant

Recently I found out that the common houseplant Pothos (Epipremnum aureum) is toxic to cats and dogs due to the presence of "insoluble raphides." I have a lot of these plants around my house and my ...
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2answers
308 views

What kind of tree could this be?

This may be a strange question, but does anyone know what kind of tree this could be? I know, it's just a comic, but these trees, at “walking distance” within that comic are easily identifiable as ...
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2answers
30 views

Clarification on Hatch and slack pathway

The following is a minor clarification that I want to make, since it is rarely addressed directly in most of the texts I have gone through. In $C_4$ pathway, the chloroplasts are dimorphic, that ...
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1answer
37 views

Terms related to megasporogenesis

Well, I am not able to understand the exact difference between megasporocyte and archesporium. Also I'm not quite able to get, how or precisely from where do these arise? Please help.
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2answers
137 views

What does dominant generation mean

In my texbook it is written that for non- vascular seedless plants the dominant generation is the gametophyte as the gametophyte generation is larger and longer lived. Is the criteria for dominant ...
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1answer
47 views

Identification of this plant?

Photographed in Rocky Point, Mexico. Any ideas about this plant? Thank you!
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1answer
152 views

How to determine if a plant is autotrophic or heterotrophic?

How do you determine if a plant is autotrophic or heterotrophic, and are there any traits in particular that can be used to classify species? As two examples, how should Melampyrum pratense and ...
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1answer
67 views

What is Growing on These Tree Leaves?(Image)

I found a seemingly diseased tree when I was out playing tennis yesterday... What is growing on this tree leaf? Is this a disease? If so, is it contagious? I have zero knowledge in botany, but I'm ...
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1answer
39 views

How to distinguish those flowers in outskirts: hawkweeds (Hieracium), hawksbeard (Crepis) and hawkbits (Leontodon)?

How to distinguish those flowers of the forest outskirts: hawkweeds (Hieracium), hawksbeard (Crepis) and hawkbits (Leontodon)? I am not asking about concrete species it should be extremely hard since ...
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1answer
80 views

Electron transport in granal stacks

See paper for distribution of PS-I and PS-II within grana As explained in the above paper, the PS-I complex is primarily located within non-appressed thylakoid region and stroma lamella, while PS-II ...
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1answer
52 views

Is Schoons Hard Shell muskmelon a hybrid?

Would Schoon's Hard Shell muskmelon be considered a hybrid as I have read it was a cross between a Bender's Surprise and a Honey Rock.
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1answer
62 views

Resource plant anatomy/lifecycle vocabulary

I've been curious about a lot of vocabulary words in the world of botany. I've had quite a bit of trouble finding somewhere online to help me out, but I'm having some trouble finding a resource like ...
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1answer
40 views

Can Palisade Cells Survive Independently?

I have been intrigued by this question. Can palisade cells survive independently from its parent plant in a chemical environment? For example, if we were to separate a palisade cell from a plant and ...
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0answers
19 views

what is the difference between early blight of potato and late blight of potato?

apart from different fungus causing these diseases in potato, how are Early Blight of potato and Late blight of potato different?
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0answers
92 views

Change of phase from juvenile to adult in plants

I tried googling this but couldn't get much information on this. Most of the articles were about induction of flowering. I am more interested in knowing what factors influence the conversion of ...
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0answers
32 views

Root hair formation in Arabidopsis

In arabidopsis, 2 cell types arise in the root epidermis : root hair cells and hairless epidermal cells. The immature epidermal cells that are in contact with 2 underlying cells of root cortex ...
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0answers
20 views

Is there a database of pollen-seed distances across plant species?

I was enjoying Richard Smith's excellent answer to this question, and wondered: If you consider the pollen/seed distribution range to be plant locomotion, is there a database that compares these ...
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0answers
76 views

Green feather-like formations in tap water - what is it? (with pictures)

These things recently appeared in my tap water Copenhagen Denmark, this summer 2013. They are very small, and have a feather like structure. I've called the water supply, and they thought that it was ...
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1answer
57 views

What is this plant in the Butler, Pennsylvania area?

This is growing in the woods near my house in the Butler, Pennsylvania area. I have not seen it around before and I have no idea what is it. What is it? Is it poisonous to pets (or little kids)?
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0answers
20 views

Living organisms with properties similar to both plants and animals? [duplicate]

Is there any example of currently living organisms that shows close resemblance to both being a plant and an animal? What is the plant with the closest possible resemblance to animals, and What is ...