- Branche: Plants
- Number of terms: 21554
- Number of blossaries: 0
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The American Phytopathological Society (APS) is a nonprofit professional, scientific organization dedicated to the study and control of plant diseases.
Reduced disease symptoms on a portion of a plant distant from the area where a hypersensitive response occurred or other stimulus was applied; a rapid and coordinated defense response against a variety of pathogens as a signal travels throughout the plant (see induced systemic resistance. )
Industry:Plants
# In fungi, a resting structure in a protective membrane or shell-like enclosure;
# In nematode females, the egg-laden carcass of a female nematode;
# In bacteria, a specialized type of bacterial cell enclosed in a thick wall, often dormant and resistant to environmental conditions.
Industry:Plants
Transfer of aerial parts of one plant (e.g. buds or twigs - the scion) into close cambial contact with the root or trunk (the rootstock) of a different plant; a method of plant propagation; the joining of cut surfaces or growing roots of two plants to form a living union.
Industry:Plants
A method to obtain pure colonies of bacteria and fungi in which infected plant material or infested soil is diluted in sterilized water. Small samples of the water are spread on the medium surface of several petri plates to find which dilution will produce pure colonies.
Industry:Plants
Parasitic flowering plant that contains chlorophyll when mature (photosynthetic) and obtains water with dissolved nutrients by connecting to the host xylem via the haustorium, e.g. true mistletoe (Phoradendron spp. or Viscum spp. ) or witchweed (Striga spp. )
Industry:Plants
The departure of the average daily temperature from a defined base (e.g. the minimum recognized temperature for the growth of a plant species. ) The number of degree-days may be totaled to assess the accumulated warmth of a particular year's growing season.
Industry:Plants
A measure of the level of a chemical, i.e. a pesticide residue, that is believed to be able to be consumed on a daily basis over a lifetime without harm; used by the U. S. government to establish safe levels of potentially hazardous substances in food.
Industry:Plants
Seeds, propagative plant material, or nursery stock produced and sold under inspection to maintain genetic identity and purity, freedom from harmful pathogens, insect pests, and weed seeds. It is approved and certified by an official certifying agency.
Industry:Plants
Compact fruiting compact fruiting structure, especially the erumpent spore mass in the rust fungi (Uredinales) and smut fungi (Ustilaginales); occasionally a group of fruiting bodies as in Synchytriaceae; a cluster of sporangia on a fern sporophyte.
Industry:Plants
The double-stranded, helical molecule that contains genetic code information; each repeating unit, or nucleotide, is composed of deoxyribose (a sugar), a phosphate group, and a purine (adenine or guanine) or a pyrimidine (thymine or cytosine) base.
Industry:Plants
