The study of the form and internal structures of plants.

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116 views

Why do cucurbits produce so much fluid when their stems are cut?

When carrying out some germination tests on species in the Cucurbitaceae, I notice that young plants of this family produce a lot of clear fluid when they are dissected. Most plants I dissect do not ...
9
votes
1answer
199 views

How do pineapples and lemongrass grow?

You can't plant the leaves, you can't plant the fruit, but, if you plant the part where leaves and fruit meet you will grow a whole pineapple plant. The part of the pineapple where the leaves meet ...
8
votes
1answer
106 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, ...
8
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1answer
1k views

How can a monocot get so massive?

Some monocots (such as palms) are impressively thick and massive, yet botanists maintain that they don't have secondary growth. Why do botanists say this? How can it get so big without secondary ...
6
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2answers
268 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 ...
6
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1answer
700 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?
6
votes
1answer
305 views

Regulation in plants bearing cleistogamous and chasmogamous flowers

In most plants bearing cleistogamous flowers, chasmogamous flowers are also borne by the plants. For example, Viola, Oxalis and Commelina contain both these kinds of flowers.( I am unaware of a ...
5
votes
1answer
61 views

Does a plant have to be alive for its roots to prevent erosion?

One argument often given in favour of saving current and planting additional plants/saplings is the roots hold soil together and prevent soil erosion. Unlike plants that may be uprooted, a large ...
5
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1answer
56 views

How are Raunkiær's plant life forms viewed today?

At the beginning of the 20th century, Raunkiær proposed a typology of plant life-forms based on where they bear their buds, roughly as: cryptophytes: belowground hemicryptophytes: at the surface ...
4
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2answers
99 views

Is it possible to grow any kind of plant soilless (hydroponics)?

Hydroponics is a subset of hydroculture and is a method of growing plants using mineral nutrient solutions, in water, without soil. [wikipedia] My question is if is it possible to grow any kind of ...
3
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2answers
74 views

Where do trees get their shape?

Does anyone know any good resources dealing with shapes of trees? For example, pine trees are cone shaped for optimal absorption of sunlight, but lone pine trees growing in isolation (and other ...
3
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1answer
27 views

Seed Dormancy and Seed Transportation

My textbook says "As the seed matures it loses water and enter dormancy". I am confused as to whether this happens before the seeds are transported or after, and as to how seeds know to become dormant ...
3
votes
1answer
287 views

When happens when pollen grains land on the a part other than the stigma of a flower of the same species?

When happens when pollen grains land on the a part other than the stigma of a flower of the same species? Would the pollen be transported to the stigma or would it just sit where it landed and nothing ...
3
votes
1answer
101 views

Sporophyte and gametophyte

My textbook says that in both groups of seedless plants (vascular plants, non-vascular plants) the gametophyte is a free-living plant, independent of the sporophyte. I don't understand this statement ...
3
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0answers
124 views

Why are trichomes important for both the roots and shoots of plants?

In what ways are trichomes vital to the plant? Why have them on the plant shoots as well?
2
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2answers
163 views

A source for leaf architecture of different plant species/genus?

I'm currently working on extracting some features of the leaf architecture based on their images (like L:W ratio, laminar shape, ...). I use the Manual of Leaf Architecture as the reference. It is ...
2
votes
1answer
48 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 ...
2
votes
1answer
46 views

Exotic Cell Shapes

As far as I know, plant cell shapes are a difficult thing to pin down. However plant cells have cell walls and so can be very rigid. However the only plant cells I've seen have been either block ...
2
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0answers
44 views

Why do conker flowers grow upwards?

Most trees I know that have their flowers in groups hang these groups down. I noticed, however, that conker flowers grow upwards! I guess that growing against gravity requires special effort, so ...
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vote
2answers
107 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 ...
1
vote
1answer
36 views

Artificial Propagation and it's relation to asexual reproduction

I know that asexual reproduction is also called vegetative reproduction. However I do not understand it's relation to artificial propagation. Is it a technique used for asexual reproduction (the ...
1
vote
2answers
243 views

What does dominant generation mean

In my texbook it is written that for non- vascular seedless plants the dominant generation is the gametophyte as the gametophyte generation is larger and longer lived. Is the criteria for dominant ...
1
vote
2answers
756 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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0answers
33 views

Root hair formation in Arabidopsis

In arabidopsis, 2 cell types arise in the root epidermis : root hair cells and hairless epidermal cells. The immature epidermal cells that are in contact with 2 underlying cells of root cortex ...
0
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1answer
481 views

Is there any natural blue rose?

I had recently read an article that the possibility of having natural blue rose is extremely rare because of the absence of delphinidin in most roses. Are all blue roses just a product of ...
0
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1answer
81 views

Scientific name for the union point of a plant stem and root

Is there a word that describes the meeting point of a plants growing stem and its root? Is this the same term for aerial roots above soil level?
0
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1answer
31 views

Seed Germination

Is my understand of how seed germination comes to be and what it entails correct? Seed germination: As the seed matures it loses water and enters dormancy (a state in which it’s metabolic processes ...
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0answers
16 views

Artificial propagation and Asexual Reproduction [duplicate]

Am I right when I say artificial propagation techniques provide the means for plants to reproduce asexually? Also, is my understanding of asexual reproduction and artificial propagation correct: ...
0
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2answers
67 views

Plant anatomy, what are these stem like filaments growing under the flower

The picture below shows what I am talking about. Each flower has one and I am just wondering what they are?