Most aquatic plants in aquarium are swamp plants. I think all aquatic plants lack stomata regardless of whether it is fully submerged or semi emerged. Stomata regulate moisture loss and gas exchange that is critical in terrestrial plants but not aquatic.
Pearling can lead to some streaming, but streaming can occur without pearling.
Let me start with asking you again for links that will back your previous claims, as you have yet to provide any.
I assume you mean wetland not swamp?
It is irrelevant what we think if we can't somehow back it up, at least when we venture into the domain of science. You fail to specify what you mean when you talk about 'all aquatic plants' but let us just for a second go with the definition given on page 13 and 14 in the following book
https://books.google.dk/books?hl=da&lr=&id=3AgSBQAAQBAJ&oi=fnd&pg=PA3&dq=definition+of+aquatic+plants&ots=KE80UPtuGd&sig=p4aZeWbizD-JhqAWJ2gdp2qTm4Q&redir_esc=y#v=onepage&q=definition of aquatic plants&f=false and go from there. As you can see they find it hard to come up with a good definition as the lines are blurred but the plants we use in aquariums will for the most part fit the definition, but again you need to define what you mean when you talk about 'all aquatic plants' which you then can define as 'plants that lives under water and lack stomata regardless of whether it is fully submerged or semi emerged' but that leads to circular argumentation in this case...
I suggest you read the following article on gas exchange of some submerged plants
https://nph.onlinelibrary.wiley.com/doi/full/10.1111/j.1469-8137.2007.02318.x (look at table 1 for quick reference) and just in case you feel inclined to question
Sparganium emersum (S) look at page 2024 in this:
https://pdfs.semanticscholar.org/3590/93a3bc68b799568a337816deda79a393dd76.pdf, as they do have stomata.
The last part of your first line:
Quote:
'Stomata regulate moisture loss and gas exchange that is critical in terrestrial plants but not aquatic.'
/end quote.
Links please? I agree on most of it, but it hinges on what is meant by aquatic.
That last line is just meaningless, unless you define what pearling and streaming is. Replace Pearling with Heat and Streaming with Sublimation and most people will struggle as heat and sublimation are terms they do not have a firm grasp on.
You have also yet to explain how the lack of stomata on one of the plants in your mind makes the article questionable, please elaborate.
But again plants having stomata or not, have very little to do with the posters question with regards to why he didn't see any pearling, as the article
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5349586/ describes the release of oxygen bubbles from plants with stomata and as well as from plants without stomata.