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

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20 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. (i.e....
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25 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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2answers
398 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 ...
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0answers
39 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 ...
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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 ...
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2answers
53 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?
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1answer
132 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 ...
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0answers
23 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 ...
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1answer
38 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 ...
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2answers
71 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
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1answer
130 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
165 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 ...
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0answers
13 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 ...
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1answer
99 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.
3
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1answer
30 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?
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0answers
44 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
44 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
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2answers
825 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
29 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 better ...
2
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1answer
207 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 ...
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1answer
44 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?
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0answers
79 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 ...
4
votes
2answers
98 views

What plant is this?

It was all along a fence in a downtown core in Ottawa, 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
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1answer
94 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 ...
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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?
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1answer
102 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 ...
3
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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
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0answers
67 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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1answer
1k views

If oxygen is such a good energy source, why do plants release it?

Why do plants release excess oxygen, rather than consuming it entirely given it is an excellent energy source?
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3answers
530 views

Doubly-compound leaf examples?

I've got a project where we collect leaves, classify them, etc. There are some required classifications. One of the requirements is to get a doubly-compound leaf. What are some trees that are doubly-...
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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?
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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 ...
4
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1answer
57 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 ...
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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?
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0answers
30 views

Symbiosis of Pseudomonas Fluorescens

Have a modest background in molecular biology and presently considering a project that requires some knowledge of botany. Specifically, I seek details on the epiphytic relation between the microbe ...
2
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1answer
77 views

Genomic DNA isolation from wheat

Can I use dry seed, wheat for example, in place of young leaves for isolation and purification of genomic DNA for PCR amplification? The goal of my experiment is to validate a novel gene which is ...
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0answers
60 views

What is the name of this plant, from Bangladesh?

This is a small plant from my backyard. I have found the flower closes in the evening.
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0answers
45 views

Please help me to identify this plant?

This is quite common in vegetations near swamp areas in Bangladesh.I have included multiple picture hope that compensate for the bad quality.
8
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1answer
106 views

Help Identifying Tree

I live in the upper southeastern region of Arizona in U.S. There's a type of tree growing in my back yard that I can't seem to identify. Its growing in an arrangement very similar to an ocotillo plant....
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1answer
51 views

How long can a plant generate oxygen from its own carbon dioxide, produced during nighttime?

I recently bought one of these miracle fruit plants (Synsepalum dulcificum). Since they are of tropic origin, they need higher humidity and temperature as we have it here in Austria. So I decided to ...
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0answers
45 views

Can anyone please help me identify this plant? [closed]

Please help me identify this plant. My aunt had one but it died due to the drought in California. She wants to get a new one but she doesn't know what it's called. The leaves are around two inches and ...
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1answer
66 views

Folding of bulliform cells

How do bulliform cells cause a leaf to fold in half when the leaf looses water? Also, how would these bulliform cells be arranged to cause the cell to instead curl up?
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0answers
54 views

Monocot stele in roots

Why do monocots have eustele in the roots instead of protostele like dicots? I thought the roots don't need the strength of eustele because the roots are supported by the soil. So what is the ...
5
votes
1answer
87 views

What is this tiny thing on the branch

I noticed a tiny spot with weird shape on the shoot of a plant (Variegata), and there are many others on other branches. I wonder what is it, this is a cropped picture of it, Thank you!
4
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1answer
116 views

Best method for measuring very young plant growth?

Is there a preferable method for measuring plant growth for a plant before the "sprout" stage? Preferably at the microgreen stage? I assume it would not involve some type of leaf based measurument, ...
3
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1answer
446 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 ...
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1answer
615 views

Why are many fruits sour?

Many fruits (like apples, berries, citrus fruits etc.) contain high levels of organic acids, especially malic acid and citric acid. Are there any evolutionary functions of those acids in ripe fruits? ...
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0answers
75 views

How does a garlic clove thrive inside a closed refrigerator?

A garlic clove has been growing very well inside a closed refrigerator. It has developed beautiful green stalks, which I think are the equivalent of leafs. Since they are green, I assume they ...