Tagged Questions
1
vote
1answer
30 views
What part of the cactus photosynthesizes?
In general, plants photosynthesize through their leaves and, to a much lesser extent, through their stems. Cacti, however, have no visible leaves, but instead spines. In what part of the cactus does ...
4
votes
1answer
99 views
Do plant-animal cross races exist?
Plants and animals have the following distinct properties:
Plants live from solar energy by photosynthesis, they use solar energy to make sugar and oxygen out of carbon dioxide, which gives them ...
7
votes
2answers
104 views
Does Sansevieria trifasciata really absorb Carbon Dioxide at night?
There's a claim that Sansevieria trifasciata (Mother-in-law’s Tongue) generates oxygen from carbon dioxide during the night.
This seems surprising to me: that process requires energy; plants generate ...
7
votes
2answers
73 views
Exactly which amino acids are phosphorylated in higher plants during state transitions?
I know it is usually stated as the threonine residue near the N-terminus of either light harvesting complex (lhc) b1 or lhcb2, but if this is somehow lost, say in a mutant, is the system flexible ...
5
votes
1answer
182 views
Do all plants photosynthesize with equal efficiency?
Just what the title states.
Given identical, necessary and favourable conditions (Probably nutrients, humidity, and light but what I mean is all necessary requirements are fulfilled) - Is ...
6
votes
1answer
152 views
Can I estimate leaf temperature from air temperature? What other information would be required?
Physiological measurements such as respiration rate and assimilation rate depend on temperature.
Most papers report tissue temperature (e.g. leaf temperature for leaf measurements), although some ...
11
votes
1answer
72 views
Does a theory exist for the formation of thylakoid structure?
I'm interested in how the structure of the thylakoid forms into its characteristic highly rugose stacks of grana. What causes the thylakoid to invaginate and self-associate, albeit with what appear to ...
5
votes
1answer
204 views
Do immature fruits perform photosynthesis?
Most immature fruits are green: peppers, pine cones, plums, lots of them. I want to know if the green is from chlorophyll in the cells. Do the fruit cells perform photosynthesis? When you cover a ...
9
votes
1answer
439 views
What's the effect of oxygen deficit on plants?
As I know all cells require oxygen. So my question is how efficiently can plants operate in no-oxygen atmosphere? Do all plants produce enough oxygen for themselves? Can they consume their own oxygen ...
6
votes
1answer
157 views
How do white Caladiums perform enough photosynthesis to support their mass?
In some white caladiums, there is less than a square inch of green space spread over the whole leaf. How do these plants perform the photosynthesis necessary to support the large leaves, the roots, ...
7
votes
1answer
138 views
Compare and contrast “Rubisco activity” and “assimilation rate” (is there a difference, and if so, what is it)?
I am confused about the variable "RuBisCO activity". How is it measured, and is it any different from the net assimilation rate?
Based on some background reading (e.g. Kling, 2008; Lambers et al ...
11
votes
1answer
797 views
How does a plant grow before photosynthesis is possible?
During photosynthesis, a plant translates CO2, water and light into O2. I assume the carbon C is further used for the growing process. I wonder how the plant grows before the time where photosynthesis ...
12
votes
2answers
1k views
How will rising carbon dioxide levels in the troposphere affect photosynthetic producers?
Much discussion has been had about the affects of climate change on plantlife, but how will rising carbon dioxide concentrations affect the photosynthetic process itself? Since CO2 is a reagent in ...
