For example, with the noun cactus, a preference for generating cacti is expressed by having the corresponding rule precede the one generating cactuses.
To our knowledge, these results are the first to show that darkness triggers secondary dormancy in cacti.
This is the first report of skotodormancy in cacti.
With this information, the role of the birds and bats that participate in the dispersal process of these cacti could be evaluated reliably.
My work, while not directly specified in the score, is generally performed on whole, live cacti.
Thus, it is possible that the dark treatment triggered loss of photosensitivity (secondary dormancy) in seeds of these cacti.
The germination behaviour of untreated seeds does not differ in these cacti, therefore it could be supposed that the inhibiting factor present in the pulp is similar in both species.
Seeds of many cacti cannot germinate in constant darkness, and it might be expected that seeds of such species would readily germinate if placed under adequate light conditions.
