Questions tagged [plant-anatomy]

The study of the form and internal structures of plants.

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1answer
163 views

Why is pith of Cucurbits hollow when mature?

What is the evolutionary significance of pith in cucurbits? Does it serve a function by being hollow? Or is it an evolutionary vestige? What function would it have had in its ancestors?
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0answers
112 views

Separation of sister chromatids diring anaphase without Centrosomes in plant cell during mitosis

As in animal cell during mitosis sister chromatids are separated from each other during Anaphase by the pulling of kinetochore fibers toward their originating poles of centrosomes but as we know that ...
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1answer
77 views

Why are peas in mendelian genetics different?

In mendelian experiment, yellow seeds were seen to be dominant over green seeds. The peas I've seen are generally green and not yellow. Did he use a different variety of pea plant ? The other trait ...
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0answers
121 views

How does P-protein (phloem) help in sealing of wounds?

While I was reading a book I found that "P-proteins in the sieve elements of phloem help in sealing of wounds along with callose". So how does p-protein do that, moreover how can it reach to other ...
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1answer
2k views

Why are root hairs mostly unicellular?

Most root hairs are unicellular but why is it so? What advantages does a plant derive from a unicellular root hair that it couldn't have if it was multicellular?
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2answers
790 views

What is the name of the groove down the middle of an anther?

I thought it had a name along the lines of interlocular groove, but I haven't been able to find that term anywhere.
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1answer
4k views

Why do some plant species have lobed leaves, while similar species in the same habitat don't?

Some plants have lobed leaves, like the English oak (Quercus robur), while other plants growing the same deciduous woodland habitats, and very often growing alongside oaks, such as the European beech (...
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3answers
975 views

Plants without bacteria? is it theoretically possible?

I know from school, that all live on the Earth need bacteria as low-level "machines" that break down/extract/convert/produce chemical elements and combinations, other high-level organisms needed. But ...
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1answer
115 views

Valve-like layers example in nature?

I am searching for an example in the nature, where a layer of something (skin, coat, film etc) can allow fluid to flow trough (not absorb) from one direction and prevent/repel from other direction. I ...
3
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1answer
229 views

What is the difference between intials cells and meristems cells?

Generally plant tissues: meristems tissue: meristems cells, apilal meristems, lateral meristems Non meristem tissue: dermal tissue, vascular tissue, ground tissue my question: What is the ...
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0answers
116 views

Moss CO2 consumption

I wish to calculate how much CO2 would a sq m of moss fixes to glucose in one day, taking about 20 degrees C average temperature, 55% humidity and a regular 8 hour day. Water and nutrients are at ...
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1answer
77 views

Can some one identify this plant with really sweet smelling flowers?

Could someone help identifying this plant? The flowers on it have a very sweet smell, similar to the night queen.
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1answer
161 views

Why can't we breed watermelons without any remaining seeds in the flesh?

Watermelon is just starting to come in season in the northeastern U.S., and having a seedless watermelon is convenient. The only downside is, the "seedless" almost always still have the immature, ...
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0answers
1k views

Pits and Pores in Vascular Tissue

What purpose is served by the pits and pores in xylem and phloem cells? I cant find what purpose that these components serve in the vascular tissues in plants
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2answers
509 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 ...
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1answer
71 views

How to explain the colour of these scots pines?

I would like to know why the trunks of scots pines have a particular colour, at least in Estonia, as shown here. The bottom part of the trunks is darker than the upper part. What could explain this? ...
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0answers
49 views

Names for the degrees for symptoms from drought (or other damage) done to trees

Looking out my window, I see trees suffering from drought. I once knew the name for the degrees visible, but I have forgotten and can't find it on the net. Attempt at describing "level of dryness" ...
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1answer
554 views

Plant cell question in age 12 science test

Can anyone help me answer the questions in the attachment about plant cells. It was a question in my 12 year olds science exam. I'm baffled as I think he has given a good knowledgable answer but it ...
4
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1answer
86 views

Relation between biomass and radius of roots system

Is there a known relation between the mass of a plant to the size of its roots? For example, can I take the root size to be proportional to the biomass of the plant like in this relation: $$R = R_0 (...
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0answers
145 views

What is the molecule responsible of the yellow color of the Agave americana?

Does anybody know what is the molecule responsible of the yellow color at the edges of this plant? I noticed also that the new forming yellow part at the begging stage is soft green until it is ...
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1answer
328 views

Mechanism by which water flows through xylem

I was doing a Cambridge iGCSE past paper when I came across the question: Describe the mechanism by which water flows through the xylem I thought the correct answer would revolve around the xylem ...
4
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1answer
2k views

Do flowers transpire?

I have googled this out but no where found a satisfactory answer. The definition of transpiration states that it is the evaporative loss of water from the aerial surfaces of the plant but I am really ...
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1answer
378 views

Xylem Properties

In a biology lecture, I was told that the xylem vessels were 'narrow so that the water column does not break easily and capillary action can be effective'. My question is why is this? Is the ...
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0answers
167 views

How does an increase in CO2 concentration affect Photosynthesis and Transpiration

I noticed a strange thing in my book. At one place it says that an increase in CO$_2$ concentration in the outside air decreases the rate of transpiration but at the other place it says that an ...
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2answers
3k views

How do roots obtain nutrition?

I have a city garden (see picture below) and yesterday I was nurturing it and I pulled up a small plant. I saw its root system and laid it in the sun to dry a bit and then scraped of the rest of the ...
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1answer
3k views

Reason for aquatic plant roots

My question is about why aquatic plants have roots. At first they seem a bit superfluous to me because leaves of the plants could just absorb nutrients directly from the water thereby skipping a need ...
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3answers
2k views

Why do many fruit trees have five-petaled flowers?

Peach, pear, apple, cherry, and many other fruit trees seem to have flowers comprised of five petals. Assuming there is no evolutionary advantage to confusing students of trees, is there a plausible ...
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1answer
186 views

Could an annual plant be genetically modified to be a perennial?

My chives, asparagus, oregano, and rhubarb come back every year like clockwork. Suppose I want my bok choy to join the party - is there an "I'll be seeing you next year!" gene that can be modified to ...
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2answers
186 views

Are chilies technically peppers?

Nando's chain of restaurants (UK) refers to chili peppers as just "chilies". My friend and I had a discussion with regard to whether chilies can be called "peppers" or if they do not belong to the ...
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1answer
335 views

Which of the following is NOT a type of tropism?

Which of the following plant movements is NOT a tropism? Plant stem growing toward light Plant structure growing away from light Plant roots growing in response to gravity Vines coiling around ...
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1answer
196 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 ...
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0answers
2k 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 (...
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1answer
8k 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?
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1answer
3k 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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0answers
411 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
62 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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0answers
26 views

Where would the majority of the Indoleacetic acid (IAA) be in the shoot and what would the effect be?

If I propose that a plant is 2D and then a light source was shone on both horizontal side of the shoot, in which direction would positive phototropism occur (or would positive phototropism occur at ...
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0answers
635 views

Why is it easy to separate the cotton wool from the roots of young plants grown in cotton?

In my book it is said that if we grow Maize and Gram seeds in wet cotton, after the seeds are sprouted it is easy to separate the cotton wool from the roots of young plants. My question is why is it ...
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0answers
297 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 ...
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0answers
584 views

why monocot roots have a wide pith while dicot roots have a narrow pith?

Normally dicot roots have a nartow pith at the center but monocot roots have a wide pith. Is there any specific reason to this?
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1answer
2k views

What could cause spiral tree growth?

While hiking through one of the areas burned in the 1988 Yellowstone fires, I noticed that some of the trees appeared to have grown in spiral patterns. Most downed trees have crack patterns that ...
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1answer
820 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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1answer
122 views

Do herbaceous plants have woody parts? [closed]

Do herbaceous plants, especially perennial plants have woody parts, like woody stem?
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2answers
790 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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1answer
40 views

Accuracy of best plant growth models?

Given a plant $P$, predict its height $H$ at time $t$ since planting given some environmental variables $E_1, \dots, E_n$. How accurate are the state-of-the-art models for such thing? What data is ...
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0answers
779 views

Measuring a plant's electric activity any instructions where to place electrodes?

I would like to measure a plant's electric activity / voltage, I've looked online to find out where to place the electrodes and what type of electrodes to use but they seem to very wildly. Any ideas? ...
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1answer
212 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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2answers
203 views

How well does the radius of a tree correlate with its age?

I'm looking for a cheap non-invasive ways to approximate the age of a tree (a birch). Measuring the radius pops up in the mind as the first alternative. How would one do that? Measure at multiple ...
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2answers
4k views

What chemicals and structures control the *direction* of plant growth in leaves, stems and roots?

If you want a specific plant, let's say the snap peas I am growing that I bought at Agway. I noticed that they grow towards the light source through the nearby window. Also I think roots work the same ...
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2answers
312 views

Evolution theory - roses spikes - being more bulgy doesn't give you advantage

I've seen spike, huge spike. And I thought that development of such spikes could be contrary to the evolution theory. Being „little more” spiky doesn’t give you any advantage... So those individuals ...