Questions tagged [plant-physiology]
Study of the normal functioning of plants and plant cells
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Are there any genetically modified GMO squash with a vine growth habit which grow back from the root?
When I cut Scottish thistles with scissors, the thistle grows back from the tap root.
When I accidentally step on squash vines, the squash vine dies.
I was wondering if genetics research has produced ...
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Why do sieve elements need to be alive
I am studying high school biology and I got these two pieces of information in khan academy and wikipedia:
Sieve elements in phloem are living cells because the translocation includes active ...
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Induced mutation for fruit
If we induce a plant to be polyploidy would that affect other parts of the plant, for example when the plant produces a pollen grain would it still be (n) or would it be different?
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What is the nature of seedless fruits?
Can seedless fruit be produced in nature without humans interfering with the fruit? And would that be considered a spontaneous mutation?
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Which kind of inflorescence(s) does Sonchus oleraceus have?
Many capitulum inflorescences, several corymb inflorescences with capitulum inflorescences as the end nodes of each corymb inflorescence, or one compound corymb inflorescence with capitulum ...
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Do all plants have meristems?
Are there any plants that lack a meristem (at any phase in their lifecycle)?
Searching for it on the web, the materials I find seem to assume no, but none say it explicitly.
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Sources of chlorophyll fluorescence
I have been reading this article recently, which claims that photoinhibition of photosystem II can have measurable impacts of chlorophyll fluorescence. This confused me, however, because ...
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Primary charge separation in Photosystem II
I was reading through an article about primary charge separation in Photosystem II when I came across the following graphic:
I assumed that the axis is measured with respect to the unexcited system, ...
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Is a plant's own compost better for the plant?
Does it make a difference if a plant is composted and used for its own compost ?
Meaning, let's say there is a plant "X" (example Cucumber)
Would it grow better if the compost was made from ...
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Does lower stomatal conductance of water influenced by elevated CO2 decrease overall evapotranspiration?
From what I understand, elevated CO2 levels decrease the stomatal conductance of water in plants. What I remember from irrigation sciences, higher temperatures should be more demanding on ...
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Do monoecious plants have bisexual flowers?
I used to think that monoecious plants have male (unisexual) flowers and female (unisexual) flowers on the same plant but on different locations. But recently I learnt that monoecious plants also have ...
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Why do highland/alpine plants require a drop in night temperatures to thrive?
There are mountain plants which require a drop in nightly temperature (many Nepenthes, Heliamphora and orchids for example). A non-specialist explanation is that the plants die of "starvation&...
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Caudex vs Xylopodium difference
I live in Brazil and many plants from the brazilian grasslands/prairies exhibit an structure called, by the brazilian literature, "xylopodium" (or "xilopódio" in portuguese) - ...
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How low potassium can potatoes have due to low potassium in soil?
According to Wikipedia 100 grams of potatoes has 2005 milligrams of potassium.
But if there is low potassium in the soil where it grows, it may not be able to acquire so much potassium.
How little of ...
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What are the most intelligent plants?
For intelligence lets adapt the definition from here:
Perception of the surrounding environment
Adaptation to environmental conditions
Communication (in the case of plants, through chemical ...
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Are fairy rings documented as a growth pattern in ferns?
I planted an Onoclea sensibilis, a single plant, in my garden. After the first season, there was signs that a fairy ring was forming. A few years later it was mostly complete, but then was obscured in ...
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In traditional plant cloning, why do we require two different vectors (plasmids)?
So I was recently taught cloning in plants and I came to wonder what is the need to first put the gene of interest in the entry vector plasmid and then the final vector plasmid before finally ...
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Is there always a leaf(s) attatched to an auxillary bud?
I'm trying to create a 3D functional-structural plant model and I need to establish some axioms.
Is it guaranteed or extremely likely that where auxiliary bud forms there's a leaf(s) attached? That's ...
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Photolysis of water
Photolysis of water releases $\text{O}_2$, $\text{H}^+$ ions and $\text{e}^-$.
$\text{Mn}$ in the $\text{O}_2$ evolving complex also produces $\text{e}^-$.
What provides $\text{e}^-$ to P680:$\text{Mn}...
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Is it scientifically sound to pool repeated measurements?
I am measuring specific phenolic compounds in leaves of A. thaliana. I have many different varieties, and different treatments. Initially I was measuring one leaf per plant for three plants for each ...
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scientific reasons behind a a sudden yet temporary growth sprout of the plant when the soil has No depth?
Sorry, I'm kind of naive when it comes to plant biology.
Mark 4:5-6( New American Standard Bible 1995 )
5 Other seed fell on the rocky ground where it did not have much soil;
and immediately it ...
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Difference between "biotroph" and "parasitic"
In the studying process for my exam I learned about ways of life of pathogenes in plants. There, it was mentioned, they can live nekrotrophic, hemibiotrophic or biotrophic.
As far as I understand, a ...
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Calculation of solute, pressure and water potential
What would be the water potential (Ψw), solute potential (Ψs) and pressure potential (Ψp) at equilibrium when a cell with Ψs= – 0.7 MPa and Ψp= 0.7 MPa is placed in a solution with Ψs= – 0.5 MPa? (...
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How long can zooxanthellae survive on their own, after being expelled from coral after a bleaching event?
So many sites (and books and journals and such) discuss how long different types of coral can survive without their dinoflagellate algae (zooxanthellae), but...
How long can the poor little symbiotic ...
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How much sunlight is required for photosynthesis to peak?
I've read that photosynthesis peaks at some point over light intensities https://en.wikipedia.org/wiki/PI_curve According to https://www.bbc.co.uk/bitesize/guides/z9pjrwx/revision/5 suggests
At very ...
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Issues obtaining Fo in DIY Imaging Fluorometer
I have successfully built an imaging fluorometer at home (see project details here) and so far is working amazingly well.
But I am having serious issues in obtaining Fo to calculate Fv/Fm (Fm-Fo)/Fm. ...
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vitamin D in mushrooms
How could I test vitamin D levels in mushrooms? (I am a high school student, our lab is pretty modern, but my resources are limited)
I found an article about it (https://www.hindawi.com/journals/jfq/...
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What is the limiting factor for algal growth in the oceans?
As far as I can tell, pelagic algae require four main things to live: sunlight, carbon dioxide, trace minerals and physical space. What is the limiting factor?
Note this is kind of a deceptive ...
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Chemiosmotic hypothesis [closed]
During the transport of electrons, some H+ are removed from the chloroplast stroma, which causes a proton gradient to build up inside the thylakoid lumen. But what's the source of H+ in stroma at the ...
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Nastic movements in Insectivorous plants
Questions:
What type of plant movement is shown by each of Sundew, Venus Flytrap and Pitcher Plant? What is the mechanism of the movement?
Can a movement be both Chemonastic and Thigmonastic? If yes, ...
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In phloems, does the sap move through the sieve element cytoplasm?
We know that in xylems, the water move through the lumen of the vessel elements and move to the other vessel element through a pit. As the vessel elements are dead , there is no cytoplasm to block ...
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If stomata is closed at night ,how does exchange of oxygen take place at night? [closed]
In this article in the second paragraph, it is written that the stomata remains closed at night to reduce water loss. We know that the plants respire and take in oxygen at night. Then how do plants ...
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How do plants know to grow towards the light? [closed]
Plants lack a central nervous system. How do they know to drop leaves in full shade and to curve stems towards the current light source?
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Does Ethylene Triple response provide any advantage to the Arabidopsis thaliana Etiloated seedling,?
As ethylene has a triple response effect on Arabidopsis thaliana Etiloated seedling-
1 Shortening and thickening of Hypocotyl
2 Exaggerated apical hook
3 Short root
According to this site
Ethylene ...
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The reason behind red drop effect
I was reading about Emersion effect on Wikepedia, I was not able to correlate our current knowledge of photosynthesis with this effect,
First red drop effect
When Emerson exposed green plants to ...
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Why and how do Stomatal Guard cells turn flaccid at night time and cloudy days, and turgid during the days?
If I'm correct, the guard cells turn turgid during the day and flaccid at nights. What is the reason behind the same and how is it done? (im a noob highschool student, so basic explanations are ...
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What causes the distinct color change in matured leaves in some plants?
Maybe that color change is caused by lower chlorophyll concentration in younger leaves' cells, or chlorophyll a to b ratio differs between younger and older leaves. All I could find is that the ...
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Can Monsanto's (in)famous hybrid seed crops be cloned/grafted? If not, is there a technical or legal reason?
I understand that the seeds of a crop made from modern-day super hybrids will not, usually, produce the same quality plants in the next generation. Therefore, farmers have to buy new hybrid seeds each ...
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How does a diploid sporophyte form in non-recurrent apomixis?
I came across this definition of non-recurrent apomixis which occurs in angiosperms-
In non-recurrent apomixis, both the egg-cell and embryo are haploid and embryo is developed directly from an egg-...
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What actually kills a plant that requires winter dormancy if it is kept indoors all year?
In bonsai practice, beginners will commonly purchase a juniper (often Juniperus procumbens 'Nana'), which is an outdoor tree, and keep it inside all year. The tree invariably dies. It is commonly ...
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Is there a scale suitable for continuous tracking and recording of plant weight?
I want to measure water transpiration and evaporation in a bonsai tree, and measuring the weight of the tree in its pot is my proxy for water usage. This has worked well with manual measurements, but ...
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Can plants absorb organic compounds?
Plants are autotrophs, meaning that they grow by building organic matter out of inorganic compounds (and energy).
Is it then also true that plants are generally not capable of absorbing organic ...
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Do spring varietes of cereals have a process of vernalization?
I was wondering about this question - Do spring varieties of cereals have some process of vernalization?
It would be nice to have some description of the main processes' differences of spring and ...
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Regarding secondary growth in dicotyledonous angiosperms
I had read that (and as this image shows) the secondary and primary phloem eventually get crushed due to the repeated division of cells forming the secondary xylem, during secondary growth in ...
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What will happen if one keeps the photosynthesis plant active 24x7? [closed]
While reading this article online something said on it made me wonder.
Also, there have been suggestions and a Dawn / Dusk type of ramp up and down to simulate the slow changes in the sun have value, ...
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Production of plant derivatives using genetic engineered micro-organisms
I saw a Thought Emporium video where spider silk was produced by genetically modifying yeast. I have also read about companies making vanillin (vanilla flavour) using this technique.
I am curious to ...
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What is the mechanism by which seeds stay alive while in storage? [closed]
I know folks who store seeds for months and sometimes a year before planting them. What is the mechanism by which they stay alive?
Also some associated questions:
How do the cells in the seed stay ...
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How to extract oxygen from grow chamber
I have been developing LED grow lights for a year or so and one of the things I am trying to do is to build a grow chamber where I can control temperature, humidity, light intensity and quality and ...
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CAM Photosynthesis Oxygen Generation?
I've been looking into CAM plants - notably the snake plant which is native to West Africa.
Upon researching the CAM photosynthesis cycle, I've found it fascinating that the plant stores CO2 at night ...
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What material is permeable for plant roots, but "impermeable" for fungi & bacteria?
I'm designing an experiment where the roots of the plant will grow in a sterile environment while the shoot will grow in a non-sterile grow room. For this reason the environments of the shoot and the ...
