The study of the form and internal structures of plants.

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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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1answer
23 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 ...
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94 views

Does a plant have to have leaves to produce fruit?

Is it possible that a plant can still produce fruit, even though it may not have leaves? Are there any plant species that can produce fruit without leaves?
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1answer
51 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
45 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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18 views

Why are there not bioluminescent plants? [duplicate]

There are bioluminescent animals and fungi, so why hasn't this ever evolved in plants? I imagine it would be good at attracting night pollinators.
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25 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
426 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
55 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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30 views

Why are amides transported via xylem vessels? Why not phloem?

There is a statement in my textbook: "since amides contain more nitrogen than amino acids, they are transported to other parts of plants via xylem vessels" I wanted to know why the book ...
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832 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
105 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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2k views

Difference between thylakoids and lamellae in a chloroplast?

I'm slightly confused as to the difference between thylakoids and lamellae. My understanding was that thylakoids are 'discs' that are stacked into grana and there is a membrane between the grana ...
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10k views

Why should plants transform glucose into sucrose before transporting it to other parts?

I've learned that plants transform glucose into sucrose before sending it into phloem. But the process seems to be complex and energy comsuming. Why should plants do it? Is it really necessary?
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156 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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2answers
53 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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21 views

What does glucose change into? [closed]

What are the names of the substances that glucose can be changed into that a plant needs for different functions or structures?
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1answer
47 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
72 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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282 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
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?
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2answers
373 views

What determines the spiral direction of plants?

Some plants and vines spiral clockwise as they go along (right direction) and some spiral anticlockwise (left direction). What determines which direction they spiral along? At first I believed it to ...
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22 views

Arrangement of Vascular Tissue

In the amphicribral concentric arrangement of vascular tissue, a central cylinder of xylem is surrounded by phloem. In the amphivasal concentric arrangement, the reverse arrangement - a central ...
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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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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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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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18 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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17 views

Pando clonal colony

What is the specificity of the Pando clonal colony? Can it be implemented on other plants? What aired the basic mechanisms that support the growth and sustenance of this clonal colony?
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64 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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52 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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133 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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117 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
223 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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2answers
81 views

Can anyone ID this flower plant by the photo?

Can someone identify this plant? It has big red flowers when it flowers! Not sure if it is native, but it is in my grandmothers garden in Vancouver, British Columbia, Canada.
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1answer
42 views

Do herbaceous plants have woody parts? [closed]

Do herbaceous plants, especially perennial plants have woody parts, like woody stem?
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19 views

Do epidermal differentiated cells release cutin, like guard cells?

Cutin is released by epidermal cells. Do epidermal differentiated cells like guard cells or trichomes or root hairs also release cutin? Many thanks.
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1answer
209 views

Can roots have cuticle, especially aerial roots?

In my school biology book, it is written that cuticle covers the epidermal cells in aerial parts of plants and root epidermis doesn't have cuticle. My question is that whether aerial roots, in plants ...
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2answers
236 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
31 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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205 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
48 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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114 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
2k 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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144 views

From where is the pollen kit material secreted?

From where is the pollen kit material secreted? I think it the tapetum would be a good candidate, since it is provides nutrition to the pollen grains.
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122 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 ...
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32 views

Location of embryo development in angiosperms

What floral organ does the development of the embryos of angiosperms occurs in? Is it the ovary? The pollen tube grows down through the style and double fertilization occurs and the embryo begins to ...
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1answer
143 views

Why do Lapidaria margaretae look like stones?

Previous Research I stumbled across a trending reddit post "Lapidaria margaretae looks like stones" (as of 3rd Februrary 2015); but I could not find discussions as to reasons behind why. Question/s ...
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73 views

What are the white spots?

What are these white spots? It's like Braille writing or something. How is the appearance encoded in the plant? (which I think is a Pine, though I am not sure).
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2answers
147 views

How to preserve leaves between sampling (collection) and analysis?

Suppose I spend a day in a forest, collecting different kinds of leaves, which I would like to analyze under a compound microscope. Now, obviously, measures should be taken to preserve the leaves some ...
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1answer
108 views

Gender and age-specific mutation rate in plants

Background General concept According to Cochran and Harpending (2013), mothers transmits on average a number $x$ of new mutations to their offspring. This number $x$ is independent of the age of the ...