ABSTRACT
Just as pathogens have evolved to colonise living plants, so plants have developed means to prevent or tolerate their presence. Because plants are unable to move to escape these challenges, they have developed many diverse and unique strategies, and as each mechanism is studied in greater detail, so new layers of complexity are uncovered. This chapter gives an overview of the range of mechanisms that are known to exist and how they relate to each other, before we look in detail at the genetics of resistance and structure of resistance genes in Chapter 10, and the signalling and cross-talk between resistance mechanisms in Chapter 11.
