The phrase "plant genomes" refers to the complete set of genetic material or DNA contained within a plant. It includes all the genes and other important sequences that determine the plant's characteristics, growth, and functions. Full definition
Other times, the desired trait, such as the ability to resist certain pests, can be absent in plant genomes. (scientificamerican.com)
These small, mobile and virus - like DNA elements have been a part of plant genomes for millions of years and most of the time they lie dormant and do no harm. (genomenewsnetwork.org)