Modified Roots and Their Economic Importance

In warm climates where freezing is not a problem, roots can grow above ground where they assume diverse functions. Above-ground roots are well developed in orchids, fig trees, and mangroves growing throughout the tropics and subtropics. The orchid family includes climbing orchids and epiphytes that live on tree branches, close to sunlight but away from soil. Roots of the vanilla orchid emerge from the stem and support this climbing vine by twining around sticks and branches of trees. Roots of...

Seed Preservation

Landrace a variety of a cultivated plant, occurring in a particular region population a group of organisms of a single species that exist in the same region and interbreed germplasm hereditary material, especially stored seed or other embryonic forms Conservation of crop genetic resources is important to the long-term health of the world's food production systems. Genetic diversity provides the raw materials for selecting and improving plant traits such as resistance to pests, diseases, and...

Record Holding Plants

Of all the kingdoms of living organisms, the plant kingdom exhibits the greatest extremes of size and scale of individuals. From gigantic, massive organisms to extremely small ones, the plant species truly demonstrate the immense range of growth forms and size differences. Some record-holding plants are listed in this article however, additional research may disclose new records of interest to botanists. Largest Plant. An individual plant of giant sequoia (Sequoiadendron gigan-teum) in Sequoia...

Conium Maculatum Phytoremediation

See Deciduous habit Shape and form Habitat degradation, 1 69, 70-71, 2 108 Hallucinogenic, defined, 1 33, 2 164 and Glossary Hallucinogens and hallucinogenic plants, 3 192-194 angel's trumpet and jimsonweed, 3 193-194 ayahuasca, 2 116, 3 193 marijuana, 1 101, 119-120, 3 194 see also Cannabis mushrooms, 2 164 nutmeg and mace, 1 46, 3 174, 192-193 ololioqui, 3 193 peyote, 1 115, 3 192 Halophilic Archaea, 1 56 Halophytes salt plants , 1 56, 2 1, 3, 77, 3 2 See...