Chironex

I just wonder whether sufficient ethylene is produced to have an effect on breaking seed dormancy. But with an open mind, I move forward. I would like to ascertain whether anyone notices any difference in germination rates using this method. Note that ethylene alone will not be an end-all to breaking dormancy. There is a synergistic relationship in the presence of ethrel. This is where I will be focusing my experimentation.
Ethylene plays a hormonal-type role in directing growth, inhibiting growth, fruiting, blossoming, leaf dropping and other functions and is present in most plants. It is one of the most prevalent gases in nature. I see your logic about using a banana as an ethylene source, but I don't think it will make a difference what the source may be as ethylene is ethylene.
If you plan to try this, please set-up a companion test as a control group. Do everything the same, except do not add the apple, banana (or whatever ethylene source) to the control group.

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Scot