What could happen to a plant if its leaves were coated with petroleum jelly?

What could happen if just the stem were coated ??

3 Responses to “What could happen to a plant if its leaves were coated with petroleum jelly?”

  1. JOHN H Says:

    The jelly would stop water loss by transpiration (good), but would prevent gas exchange through the stomata (bad). Without gas exchange, the leaf would be unable to obtain CO2, so photosynthesis would stop.
    Just coating the stem would reduce water loss by a tiny amount, but would not stop photosynthesis.

    John H

  2. Mrudul S Says:

    If only all leaves are coated then the plant will surely die. If only stem is coated, then it may not die as the plants sometimes do have a coating to prevent excess water loss.

  3. Soilguy Says:

    The philosophers have been musing about this for ages.