- 行业: 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.
Used in reference to a leaf, leaflet, flower, floret, fruit, ascocarp, basidiocarp, etc. , without a stalk, petiole, pedicel, stipe or stem; (of nematodes) permanently attached; not capable of moving about.
Industry:Plants
The process whereby a normally susceptible host is infected with a less virulent pathogen (usually a virus) and thereby becomes resistant to infection by a second, usually related, more virulent pathogen.
Industry:Plants
The transfer of genetic materials from one organism to another by humans (genetic engineering); a means of genetic variation in bacteria by absorption and incorporation of DNA from another bacterial cell.
Industry:Plants
Supporting tissue in soft stems and other plant parts, composed of elongated living parenchyma cells with unevenly thickened primary walls, often bordering veins in dicot leaves; the "strings" in celery.
Industry:Plants
Upper dome of tree, bearing leaves, flowers, and fruits; junction of root and stem of a plant, usually at the soil line; in grafted woody plants, the rootstock portion of the plant near the soil surface.
Industry:Plants
Bacterial pathogens of plants found only in the xylem, causing wilt, scorch, and stunting symptoms; vectored by insects that feed on xylem fluid; not sap transmissible; require complex culture media.
Industry:Plants
Wood decay resulting from selective removal of cellulose and hemicellulose, leaving a brown amorphous residue that usually cracks into cubical blocks and consists largely of slightly modified lignin.
Industry:Plants
A subpopulation of a species, defined on the basis of more than one character (morphologic for many organisms) that distinguishes the members of the subpopulation from other members of that species.
Industry:Plants
Air pollutant that must be chemically produced from other air pollutants, e.g. ozone (O3) that is a product of a photochemical reaction of exhaust products from combustion engines in the atmosphere.
Industry:Plants
Death of a seedling before or shortly after emergence due to decomposition of the root and/or lower stem; it is common to distinguish between preemergence damping-off and postemergence damping-off.
Industry:Plants
