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

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2answers
241 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 ...
0
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1answer
66 views

What is vascular cambium?

I'm confused over the two terms vascular cambium and intrafascicular cambium. Is vascular cambium same as intrafascicular cambium?
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0answers
33 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 ...
3
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1answer
53 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 ...
33
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
67 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 ...
1
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0answers
265 views

Is it possible to simulate the effects of high altitudes for plants?

Note- I considered asking this on gardening.stackexchange.com but i believe it is better suited for this site since it deals with more complicated material. As I understand it, certain plants ...
7
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1answer
3k views

How do lilies sense day and night and open and close their flowers?

We have lots of lily flowers inside our garden. Their flowers are open in day and closed in night. How do lilies sense day and night and open and close their flowers?
4
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1answer
56 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
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1answer
134 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 ...
12
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1answer
2k views

Why can't a corn cob have 13 rows of seeds?

Every time before eating a corn, I count its lines. I would always find 12 or 14 rows of seeds, but never 13. Is there any biological/scientific reason behind this?
3
votes
1answer
103 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 ...
2
votes
1answer
113 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 ...
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1answer
62 views

What are allogametes? please explain [closed]

Allo means different or unrelated I guess.Please clear me the meaning with some examples.
3
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1answer
51 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) ...
3
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0answers
60 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 ...
1
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0answers
19 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. ...
6
votes
2answers
282 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
24 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.
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0answers
38 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 ...
3
votes
1answer
346 views

What are these white spots on a dracena

I have a Dracaena Marginata which started to have some white spots. They turn out to be some kind of "mold" which can be removed when swapping the leaf and then leaves some discolored spots ...
2
votes
1answer
85 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 ...
1
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0answers
19 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 ...
5
votes
2answers
52 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?
3
votes
1answer
27 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?
7
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1answer
5k views

Does photosynthesis occur on cloudy days or does it require direct sunlight?

In my basic science classes in high school, I have learned that during photosynthesis, plants absorb sunlight and produce food by converting carbon dioxide and water into sugar and starch. To me, ...
1
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0answers
16 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 ...
7
votes
1answer
4k views

How does plant grafting work?

Plant grafting is a process whereby a piece of one plant is inserted into another and results in a change of the original plant. For example, grafting a piece of a lemon tree into a bitter orange tree ...
1
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1answer
37 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
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2answers
59 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 ...
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votes
1answer
89 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.
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0answers
12 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 ...
5
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0answers
37 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?
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3answers
43 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 ...
25
votes
4answers
3k views

How do trees manage to grow equally in all directions?

I was walking down a road with these beautifully huge trees when this question occurred to me. Large trees with many thick branches have to grow equally in all directions, or they would tip over. Is ...
3
votes
2answers
596 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 ...
2
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0answers
28 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
174 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
43 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?
2
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0answers
66 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 ...
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 ...
4
votes
1answer
56 views

How do I read a species description that uses both ≡ (triple bar) and “incl.” to denote synonymy?

I'm trying to understand the relationship of plants formerly classified as Dorstenia crispa with distinct individuals continuously classified as Dorstenia foetida. I would assume that the distinctive ...
3
votes
1answer
88 views

Needle-like crystals observed in wild-grape wine under microscope. Potentially harmful?

I recently crushed and strained about thirty pounds of wild grapes to ferment into wine. About a month in, I did a visual inspection of the wine under microscope to try and identify some yeast and ...
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1answer
96 views

Is there an evolutionary advantage for coconut oils to be rich in saturated fats?

I know that coconut oil is composed of multiple saturated fatty acids, but is there a reason why this would have increased the fitness of the coconut plant?
3
votes
1answer
1k views

The mystery of coconut tree

Could anyone please explain to me, why the nail which is nailed in a coconut tree is not raised from ground level, when the tree is growing up?
3
votes
1answer
33 views

Brandywine Maple?

I'm collecting and classifying leaves for biology. Teacher took us on a 'walk' to help. She let us pick and told us one leaf was a Brandywine Maple and another later on, a different leaf, was a Red ...
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0answers
13 views

Why do chlorotic leaves have green veins?

If chlorotic leaves are chlorophyll deficient, why should the veins be green? shouldn't all the available chlorophyll be directed to the leaf lamina?
3
votes
0answers
51 views

Aloe species identification

I am trying to find out which species these are. Someone claimed they were Aloe Vera, but I am skeptical as I have never seen Aloe Vera with that kind of growth. These look more like Aloe Juvenna to ...
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0answers
32 views

Can epiphyte share nutrient to host plant?

Sometimes plant share their nutrient with underground root network But if there are plant that grow on other tree. Is it possible that it would merge into another tree and sharing resource. I mean ...
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vote
0answers
15 views

what is the natural way of rose to propagate by its vegetative cells?

I have read that rose reproduces sexually. But I have also heard that it can propagate by its vegetative cells (vegetative cells in its root). Is this correct? If yes, can I know how does it propagate ...