I am very curious to know which plants carry the acidmost sap. And, for those that will be named, the lowest ph and chemical composition, including WHICH acid causes the ph to stay low.

I am also interested to know if any reaction was ever registered on the part of any plant roots versus the presence of radiations (radioactivity) in the soil. What kind of reaction, I mean.

Will be grateful to anybody who could enlighten me on these topics.

Thanks.