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

learn more… | top users | synonyms (1)

1
vote
1answer
8 views

Anemiaceae etymology

What is the etymology of the name Anemiaceae for a family of ferns? I assume that it's from the name Anemia for one of its genera, but that is equally mysterious. Obviously it has no blood, but what ...
-2
votes
0answers
20 views

Is it true that the water in coconut reduces the effect of drug taken in the body [on hold]

I'm not actually sure of this, but I was told by a colleague of mine, and I thought of getting other comments about this to learn more about the effect of coconut water or juice
0
votes
0answers
6 views

In what sense does lichen 'eat around itself'?

Source: pp 31-32, Lichen Secondary Metabolites: Bioactive Properties and Pharmaceutical Potential, edited by Branislav Ranković Lichens are used for many different medicinal purposes, but there ...
3
votes
0answers
19 views

Does the bending of a tree's trunk in the wind stimulate and strengthen root growth?

Recently Southern California experienced extreme wind velocities and afterwards the news reported over 300 trees had fallen in San Diego County. I had either heard or read somewhere that the action of ...
0
votes
2answers
26 views

Etymology of the term monilophyte

I would like to know the origin of the term Monilophyta. I know it's from Kenrick and Crane, but where did they get monilo-? It's not in my enormous Liddell and Scott Greek dictionary, nor is there ...
0
votes
0answers
23 views

Is there a special reason why ferns are so early in evolution?

Reading about plants in history it seems that ferns where already in the Devonian period (400 million years ago) growing. Probably the climate in that time was very different from now, but what made ...
0
votes
0answers
11 views

How to stimulate Mimosa pudica at its roots?

The sensitive plant Mimosa pudica is a remarkable little plant whose characteristic feature is its ability to droop its leaves when stimulated: For a new studies project, could anyone think of a ...
-1
votes
0answers
23 views

what is the Ground substance of plant organs made up of? [closed]

there's this MCQ question in my course that asks about the origin of ground substance in plants it says: ground substance of plant organs is made up of a) Sclerenchyma b) Collenchyma c) paranchyma ...
0
votes
0answers
16 views

All about Sansevieria [closed]

1.Does Sansevieria plant gives out O2 at both day and night ? 2.Is it possible to grow Sansevieria plant with out sunlight ? (If not) 3.How many hours of sunlight is needed per day and what is the ...
4
votes
1answer
51 views

What is the purpose of THC for a Cannabis plant?

Why does a Cannabis plant produce THC? This question is brought up drawing an analogy to nicotine in tobacco, where nicotine is developed by tobacco plants as a pesticide. Is THC a pesticide as well? ...
3
votes
1answer
91 views

Why does Citric Acid occur in Citrus fruits?

Why is there so much citric acid in citrus fruits? And how did it evolve i.e. what did it come from? Is it a by-product of the ripening process? Why have citrus fruit evolved a particularly high ...
0
votes
0answers
63 views

How do CAM plants keep stomata closed by day and open at night?

I understand how plants open stomata, with the H+ ion removal and the resulting K+ ion influx in the guard cells to induce turgor (wikipedia article here), though not how this process relates to ...
3
votes
1answer
33 views

Nicotine levels in non fruit/edible parts of plants (that are not tobacco)

I am an ex smoker who now vapes (uses e-cigs). Various authorities are equating vaping with smoking by calling it a 'tobacco product' - which is in a sense true given that the majority of nicotine ...
0
votes
1answer
17 views

What is vascular cambium?

I'm confused over the two terms vascular cambium and intrafascicular cambium. Is vascular cambium same as intrafascicular cambium?
1
vote
0answers
31 views

What are other creatures or plants that leave “recommendations” as ants? [closed]

I'm working on a Semantic Recommendation Systems. In the state-of-the-art, I state the fact that even animals, such as ants, using some kind of recommendations by leaving markers, which are chemical ...
2
votes
1answer
45 views

Why does the open tree of life have 2600 species of rose?

The open tree of life has 2754 species and subspecies with the prefix Rosa. Wiki says: There is significant disagreement over the number of true rose species. Some species are so similar that ...
3
votes
0answers
151 views

How many ATP are formed?

What is the number of ATP molecules formed during the photosynthetic processes which consume 8 molecules of $\text{H}_2\text{O}$ due to noncyclic electron transport and subsequent ...
3
votes
2answers
198 views

Indian tropical fruit trees and fruit bearing

Most Indian tropical fruit trees produce fruits in April-May. The best possible explanation for this is optimum water availability for fruit production. the heat allows quicker ripening ...
4
votes
1answer
35 views

Determine which seed will germinate first

I recently studied about plant physiology for a test. Strangely, there was this question which I had no idea how to approach. The question is, Which seed will germinate first? a) Castor b) Wheat ...
2
votes
1answer
82 views

Why is photosynthesis so complex?

Actually, what is the need of such long procedure? As much as I have understood, the sole purpose of photosynthesis is to synthesize carbohydrates, which is only used for energy storage. So, why don't ...
8
votes
2answers
96 views

Why aren't plants' roots as diverse as leaves?

I have been doing some gardening recently and I suddenly realised that all plants have superficially identical non-woody roots of the same size from gigantic trees to small fruiting plants and ...
-1
votes
1answer
53 views

What are allogametes? please explain [closed]

Allo means different or unrelated I guess.Please clear me the meaning with some examples.
6
votes
1answer
44 views

Is there a model perennial plant species?

Most of plant science is conducted on small annual species with short life cycles; predominantly Arabidopsis thaliana, but also a handful of others like Oryza sativa and Medicago truncatula etc. Is ...
3
votes
1answer
31 views

What are the hairs/spikes on the edges of these leaves for?

Windows 7 has a wallpaper/background which shows an attractive, leafy plant with fine hairs or spikes on the edges. What might these be for, and what sort of plant is it? My initial (uneducated) ...
1
vote
1answer
29 views

Can galls be formed from mutualistic relationships?

According to Wikipedia, galls (cecidia) are formed by parasitic insects and mites like gall wasps (Neuroterus albipes). At some metamorphic stage, these organisms alter cell division processes in ...
2
votes
0answers
51 views

What is the advantage of using plant-derived antibacterials rather than bacteria-derived antibacterials?

So obviously we have a big problem with antibiotic resistance. Most of our antibiotics originate from bacteria themselves (or are synthetic variations on scaffolds which originate from bacteria). I ...
0
votes
0answers
16 views

Machine-readable APG III trees?

Does anyone know where I can find a machine-readable version of the phylogenetic trees from APG III? I'm looking for something that contains the full tree structure, including unnamed branches. ...
1
vote
0answers
18 views

How does the shape of the structure explain the function of that structure in both plant animal cells? [closed]

Could some please tell me how the structure explain the function of something in plant and animal cells, it is in middle school level.
5
votes
2answers
82 views

How do plants get their O₂ for respiration during the night?

If I am not mistaken the stomata are closed during the night. As a result I have a hard time to imagine how the plant can get the O2 it needs for respiration during the night. I thought the plant ...
1
vote
0answers
36 views

“Signal Advance”: Unsure of meaning or contextual use

I am reading through Recombinant DNA; Genes and Genomes - A Short Course - Third Edition by James D. Watson, et. al. and I came across this paragraph in the discussion about discrete factors of ...
1
vote
0answers
17 views

Yew seed dormancy reduction

Yew seeds have very long dormancy when artificially planted. They are also adapted to passage through digestive systems of animals that eat/transport them. But could the dormancy be shorter (or the ...
3
votes
2answers
39 views

What is this species of tree?

In my city, there is a unique tree, with thorns all over it. I would like to know - what species is this?
2
votes
1answer
23 views

What is the lifecycle of hanging woody vines?

In the first ten seconds of this video, you can see a vine that appears to have started its life 60 feet up in a tree and has now grown down almost close enough to touch the ground. I have seen ...
0
votes
0answers
11 views

Pepper plant leaf curl and “sweating”

The "sweating" and leaf curl have been going on for about a week. I've done some extensive googling and have found mixed diagnoses. For context, the ambient temperature is 74°, I'm using 6,500 K lamps ...
1
vote
1answer
33 views

gene transformation from plant to plant - transgenic plant

I want to know if the expression of a transfered gene depends on source of the gene, if e.g.: 1] I isolate a gene from plant and transfered it to the same plant? 2] I isolate a gene that is highly ...
3
votes
2answers
35 views

Why Isn't mineral transport in xylem multi-directional?

According to our textbook, Xylem transport is only unidirectional while transport through phloem is multi-directional. But minerals are taken up by xylem from the surrounding tissues actively, and ...
2
votes
1answer
84 views

Why would the citrulline content of the watermelon be so high?

Citrulline is a non-proteinogenic amino acid (that is, citrulline is an amino acid that is not coded for in mRNA), and it is an important metabolic intermediate in the Urea Cycle. The Urea Cycle is ...
2
votes
1answer
46 views

Photoperiodism: Short-Day Plants

My Campbell's Biology textbook discusses photoperiodism of plants and introduces us to short-day and long-day plants. What I don't understand is why short day plants will not flower if they are ...
0
votes
0answers
9 views

Why guard cells need to turn malate into postassium malate to become turgid?

According to the Active Potassium Transport Ion concept given by Levitt et.al, stomata open due to turgidity in guard cells. It seems that guard cells turn the starch produced by photosynthesis into ...
-1
votes
1answer
45 views

How do house plants affect the quality of air in a house? [closed]

Do house plants affect the air in the house by taking it from the rooms and it is put in the dirt to make it moist then we have no air.
2
votes
1answer
22 views

Santa Fe xeric indigenous tree

The hills around Santa Fe are covered in a particular xeric tree which is quite small and looks like some kind of juniper which I have been unable to identify: What is this species?
1
vote
0answers
22 views

What type of tree is this?

I photographed this group of trees a couple of years ago at the northern tip of Prudence Island in Narragansett Bay. Any idea what species these are?
0
votes
3answers
31 views

importance of cDNA sequencing of a specific gene in different plants

i want to know what if i made a sequence of cDNA of a specific gene in different plants - what is the important from the sequence and can if found difference between plants , and can i use this ...
3
votes
2answers
157 views

Do aquatic plants have stomata?

I am wondering if aquatic plants have stomata or not. I know that non-aquatic plants have stomata to release water(transpiration) and oxygen, and to take in carbon dioxide. Do aquatic plants also have ...
1
vote
0answers
27 views

height and bryophytes

Why does being taller provide advantages for Bryophyta but being shorter is better for Marchantiophyta? What disadvantages could being taller have? I think that by being taller, you have ...
2
votes
1answer
86 views

How does one calculate the amount of oxygen produced by trees?

I'm currently working on a project to measure the impact of tree planting. Calculating the amount of oxygen seems harder than I imagined. Of-course there's the type and size of the tree and the ...
1
vote
1answer
36 views

What is the leaf venation of a scuppernong vine leaf?

I googled around and I didn't find anything that says its leaf veination. Anyone know?
1
vote
0answers
33 views

Is there a plant particularly suitable for absorbing Hydrogen Sulfide

I live in an area with some open sewers and in the morning I can usually can smell the gas inside my house. There are many plants like snake plant which improve indoor air quality but I was ...
2
votes
1answer
51 views

What plant is this?

It was all along a fence in a downtown core, flowering in November. I didn't get a better close-up of the flower itself, I had thought the leaves would be pretty important.
3
votes
1answer
59 views

Do lunar rhythms have really impact on plant growth?

It is commonly known that lunar rhythms have influence on plant growth, and there are even lunar calendars to know when planting, pruning, transplanting, harvesting, etc. I know that the lunar cycles ...