Some days later we have realised that seeds do not germinate with high concentrations of acetic acid. So we decided to prepared news solutions with 0,5% and 0,1% of acetic acid. Only some lentil plants have germinated in solutions with acetic acid 0,1%. You have the results in this table.
We have made more experiments. We have transferred seeds treated with high concentrations of acid to water. And these seeds are not able to germinate five days later. In conclusion, acid damages seeds permanently.
With our control plates we have made two sets with three plants. All al the plates had small lentil plants. One of these set has been irrigated with acetic acid 0,1%; the other one with pure water. We are going to study differences in the growing of lentils plants.