Organization of Nuclear DNA
The nucleus of a higher plant cell may contain 1 m or more of DNA at a concentration of approximately 100 mg. ml−1. Here resides the majority of the genetic information that specifies the growth, form, and developmental pattern of the organism. If we are to unravel the complex processes by which plant growth and development are controlled, we need to understand the organization and function of this DNA and how its expression is regulated. In this chapter the amount, sequence organization, function, and evolution of plant nuclear DNA are discussed, before we go on to consider the detailed structure and regulation of specific genes in Chapter 2.
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