During germination, the most resistant stage of the life cycle - the
seed - changes to the most sensitive stage, namely the seedling.
Therefore, in desert plant species seed dispersal and subsequent
germination in the optimum time an place place are particularly critical
parameters. Discussed here are the ways and means by which desert plants
have adapted through the course of evolution to their extreme
environment. Two such strategies which have evolved are a) plants with
relatively large and protected seeds which germinate when the chance of
seedling survival is high and the risk relatively low or b) those with
an opportunistic strategy: minute seeds which germinate after low
rainfall under high risk for seedling survival if additional rain does
not follow. Most species adopt a combination of the two mechanisms.
Species have adapted both genotypically and phenotypically, both aspects
of which are also discussed in this thorough text. The reader is
provided with a good understanding of the complex influences on each
seed traced through from initial development to germination stage
regarding germination preparation and subsequent survival.