18: Angiosperm Life Cycle and Diversity

Angiosperms

Plants with vascular tissue, seeds, and flowers, with the sporophyte generation being dominant.

Angiosperm Diversity

The vast variety of angiosperms, with over 300,000 known living species and a wide range of families.

Plant Domestication

The process of growing and selecting plants for favorable characteristics, resulting in genetic changes that make them more useful or desirable for humans.

Production Traits/Characteristics

Traits important in domestication, including faster growth, increased biomass, carbohydrate content shift, abiotic stress tolerance, disease resistance, and wider growth range.

Changes in Sclerification/Fibrosity

Genetic changes in plants that lead to a decrease in toxic metabolites and anti-nutrients, such as alkaloids, glucosinolates, lectins, and amylase inhibitors.

Enhanced and Variable Carbohydrate Content

Changes in carbohydrate profiles, leading to the storage or conversion of starches into sweeter fruits with mono- and disaccharides.

Developed or Increased Variability in Pigment

Selection for more variation in fruit color through changes in plastids and the storage of anthocyanins and betacyanins with antioxidant properties.

Increased Biomass & Water Content

Genetic changes that result in increased biomass and water content in edible grasses like Zea.

Centers of Origin

The geographical regions where modern food plants evolved, characterized by high varietal diversity, co-occurrence of wild ancestors, and a long history of crop use.

Germplasm

The genetic composition of a particular species, usually collected and stored through seeds.

Preserving Crop Plant Germplasm

The importance of conserving the genetic diversity of crop plants to maintain a complete genetic inventory and aid in plant breeding.

Svalbard Global Seed Vault

A seed bank located in Norway that serves as a germplasm reserve for countries, providing a backup collection in case of regional or global crises.