22. What is a beneficial way ethylene affects plants; what is a negative way ?

Beneficial is fruit ripening

And negative is abscission.

Explanation:

Ethylene is a plant growth regulator or phytohormone of plant. It is beneficial to plants in that it aid fruit ripening, it hasten flower opening and shedding of leaves.

Ethylene also have a negative effect and they include; Ethylene effects include: it result in loss of chlorophyll, abortion of major plants part, it lead to the stem shortening, abscission or dropping of plant parts, epinasty, and dormancy and scinence. Thus hormone can be produced when plants are injured, either mechanically or are affect by certain disease

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.