Study of the normal functioning of plants and plant cells

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What are the theoretical and actual (measured) minimum water potentials in plants?

I'm a plant physiology researcher, but water potentials are not really my thing, so I don't have a great grasp on the literature. I'm dealing with water potential data right now though, and it seems ...
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Affinity species between plant by protein [on hold]

How determination Affinity species between plant by protein electrophoresis?
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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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Do trees have genes for stopping the grow?

Do trees have genetically encoded to stop growing at some height, to keep dividing the cells only to a certain amount, or to pump nutritions only till it's advantageous because they've already ...
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What tell a plant to have one/a lot of flower(s)? [closed]

some plants just have one flower and some have more. This is the question. please simply tell me how? which genes or pathways control this in various plants?
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How can plants be grown in hydroponics, and yet not handle too much water in soil?

It's pretty much common knowledge that plants planted in pots or soil that doesn't have good drainage can't be watered too much, or they'll "drown". Regardless of what actually happens, experience ...
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Moss Transportation System

In my biology textbook, it says that mosses are avasculer and do not have xylem like spermatophytes. So by what means do mosses transport nutrients ?
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Plasmolysis vs Flaccidity in cells

When is a cell said to be flaccid and when is it called plasmolysed? So far I found that there is a specific relation to osmosis.
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Are there any (chemical) processes occuring inside a seed while it's in a dormant state?

If a seed were in a glass jar without a chance of germination, are there any (chemical) processes occurring inside the seed while it sits there? My intuition tells me no since my understanding of ...
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What is a rough estimate of CO₂ saturation for high-yield or high growth rate plants?

Naturally, plants have individual photosynthesis capacities, but it would still be interesting to get a general picture of CO2 saturation levels for some common cultures. Where lies the optimal yield, ...
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Can plant roots absorb dissolved oxygen from water, or do they require actual bubbles in the water?

Plant roots generally require some exposure to air. Deep water culture is a form of hydroponics where plants' roots are left to soak in water. To keep the roots from "suffocating", most online ...
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Is it possible and how could it possible for plant to survive in naked space

I heard that there are fungi could survive on space station in the naked space. I want to know if any plant could be able to do the same How many limitation of plant differ from fungi And could it ...
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Plant symbiosis, alternative regulation pathways to AON and miRNA399?

I am currently studying systemic repression of both arbuscular mycorrhizae and nitrogen fixing bacteria in legumes. I know of the AON pathway (which works through CLE and NARK). I also know of ...
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Phototropism or Hydrotropism is a more important factor for trees beside the lakes growing bending to the water?

I see a lot trees beside the lakes are growing bending to the water and I wonder why. After reading this I think it might be a combined effects by: Phototropism: the lake works as a mirror and ...
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Does anyone know the explanation for branches with different flower colors (see picture)?

As you can see in the below picture, there's a branch with white-colored flowers, while the rest of the tree has pink flowers. I googled a number of questions but it is a bit complicated to ...
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19 views

Do any plants grow leaves beneath the ground?

We have a pretty common California weed in our yard. When we dig in the ground, we often find small ones there, with green leaves! It's as if they form green leaves before they come to the surface. ...
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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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Why do fruits have to ripen?

It seems like most fruits that we consume undergo some sort of ripening process either before or after they are picked from the vine, tree, etc. I understand that sugars are released during the ...
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Current scientific theories for evolution of Cucurbita

I'm attempting to find research on scientific theories surrounding the evolution of certain plants, and am unable to find any footing with respect to a certain genus. In this case, I am researching ...
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What is the difference between the glycolate pathway and photorespiration?

I came across the definition of photorespiration as a process that forms CO2 from O2 in the presence of light. However, the CO2 is released only when the plant cell undergoes the conversion of ...
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How does the snail shells' fertilizer compare to regular fertilizers?

May I ask about the quality of the fertilizer derived from the shells and their effectiveness compared to other fertilizers on the market ?
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21 views

Relation b/w venation and transpiration

What purpose does reticulate venation in dorsiventral leaf or parallel venation in isobilateral leaf serve? Does it have any relation with unequal transpiration in dorsiventral leaf or equal ...
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Why do the vines change their spinning direction?

Look at the vines holding onto the lattice. The "vine springs" change their spinning direction in the middle. Why? And how do they achieve this? (By the way, what's the name for this plant? Is is ...
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Why it seems that principles of chemistry are not being applied in this biochemical process? [closed]

According to an answer in this question, my concept used below does not apply: In the non-cyclic photophosphorylation, consider splitting of two water molecules, then 4 e- (electrons) and 4 H+ ...
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Ions in Stomatal Opening Mechanism

When a stoma’s guard cells try to swell and open the stomata, they actively pump out protons outside of the cell. This causes a membrane potential, where the inside of the cell is negative with ...
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How can I estimate the CO₂ uptake of a plant?

I would like to make an estimation of the CO2 uptake of plants I cultivate, including, lettuce and aromatic herbs, such as thyme, basil, rosemary. What I want is to end up with a rough indicator for ...
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142 views

Why does Citric Acid occur in Citrus fruits?

Why is there so much citric acid in citrus fruits? And how did it evolve i.e. what did it come from? Is it a by-product of the ripening process? Why have citrus fruit evolved a particularly high ...
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54 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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132 views

How do CAM plants keep stomata closed by day and open at night?

I understand how plants open stomata, with the H+ ion removal and the resulting K+ ion influx in the guard cells to induce turgor (wikipedia article here), though not how this process relates to ...
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How many ATP are formed?

What is the number of ATP molecules formed during the photosynthetic processes which consume 8 molecules of $\text{H}_2\text{O}$ due to noncyclic electron transport and subsequent ...
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Do plants need vitamins to grow?

I've found that some commercial off-the-shelf liquid nutrient mixtures are advertised: contains vitamins your plant needs to grow. And I started to ask myself, do plants really need vitamins to ...
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Determine which seed will germinate first

I recently studied about plant physiology for a test. Strangely, there was this question which I had no idea how to approach. The question is, Which seed will germinate first? a) Castor b) Wheat ...
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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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Why do we need to put phosphate fertilizers along with rhizobium?

Isn't phosphorous a macro nutrient? So it should be present in the soil in sufficient quantities... but still we add phosphate. Why?
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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 ...
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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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Extraction of RNA from algae

I have used a standard protocol (I will give the bibliography below) to extract RNA from an algae (Posidonia) but I have get literally nothing, since I could not even see traces of the two rRNA. I ...
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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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How fast do stomata respond to environmental changes?

How fast does stomatal resistance respond to environmental changes? Correct me if I'm wrong, but I assume that atmospheric humidity would be the fastest changing factor (e.g. rain storm on a dry day, ...
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How fast is water transported from roots to leaves?

I understand basically how water transport from roots to leaves through the xylem works, but I have no idea of the timescales involved. How long does it take for water to get from root tips to ...
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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 ...
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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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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 ...
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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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177 views

Can electricity be harvested from the soil around plants? [closed]

This is a rehash of a question I originally wrote on Skeptics which got moved to Physics, but I'm really after an answer from a biological perspective. A device called the E-Kaia is making news by ...
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110 views

What do the numbers in Photosystem I P700 and Photosystem II P680 stand for? Is it the optimum wavelenght? The maximum wavelenght?

I am a bit confused about this because my teacher and english Wikipedia say it's the wavelenght the Photosystem is most reactive to; my textbook and the german Wikipedia say that it is the maximum ...
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62 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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Available soil water to plants

Textbooks say that when the water content of soil is greater than its field capacity, the water is not available to plants. Why? I know some plants can utilize water even from saturated soil, but for ...
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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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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 ...