| phyto- | <prefix> A combining form from Gr. Fyton a plant; as, phytochemistry, phytography. (29 Oct 1998) |
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| phytoagglutinin | A lectin that causes agglutination of erythrocytes or of leukocytes. (05 Mar 2000) |
| phytoalexin | <protein> Toxic compounds produced by higher plants in response to attack by pathogens and to other stresses. Sometimes referred to as plant antibiotics, but rather non-specific, having a general fungicidal and bacteriocidal action. Very much analogous to an antibody response as production is triggered by elicitors. Examples include: pisatin, phaseolin. (14 Oct 1997) |
| phytobezoar | A gastric concretion formed of vegetable fibres, with the seeds and skins of fruits, and sometimes starch granules and fat globules. Synonym: food ball. Origin: phyto-+ bezoar (05 Mar 2000) |
| phytochemical | Technically, any chemical produced by a plant, but this term usuallyrefers to certain plant chemicals (such as carotenoids) that researchers believe may impart health benefits such as better protection from cancer. (09 Oct 1997) |
| phytochemistry | Chemistry in its relation to vegetable bodies; vegetable chemistry. Origin: Phyto- + chemistry. Source: Websters Dictionary (01 Mar 1998) |
| phytochimy | Alternative term for phytochemistry. Origin: F. Phytochimie; Gr. A plant + F. Chimie chemistry. Source: Websters Dictionary (01 Mar 1998) |
| phytochrome | Plant pigment protein that absorbs red light and then initiates physiological responses governing light sensitive processes such as germination, growth and flowering. Exists in two forms, Pr and Pfr, that are interconverted by light. (18 Nov 1997) |
| phytochromobilin synthase | <enzyme> From plants; reduces biliverdin ixa to phytochromobilin; requires ATP and NADPH Registry number: EC 1.3.1.- (26 Jun 1999) |
| phytodermatitis | Dermatitis caused by various mechanisms including mechanical and chemical injury, allergy, or photosensitization (phytophotodermatitis) at skin sites previously exposed to plants. (05 Mar 2000) |
| phytoene dehydrogenase | <enzyme> Phytoene is oxidised to phytofluene; has been sequenced; genbank d83514 Registry number: EC 1.- Synonym: phytoene desaturase, carotenoid desaturase, crti gene product, carc gene product, carb gene product (26 Jun 1999) |
| phytoene synthase | <enzyme> Calatyzes the 2-step reaction from geranylgeranyl pyrophosphate to phytoene via prephytoene pyrophophate Registry number: EC 2.5.1.- Synonym: pys gene product, crtb protein, crtb gene product (26 Jun 1999) |
| Phytoflagellata | A subclass of Phytomastigophorea, the members of which have yellow or green chromatophores. Origin: phyto-+ L. Flagellum, a whip (05 Mar 2000) |
| phytogeny | The doctrine of the generation of plants. Origin: Phyto- + genesis, or root of Gr. To be born. Source: Websters Dictionary (01 Mar 1998) |
| phytogeographical | Of or pertaining to phytogeography. Source: Websters Dictionary (01 Mar 1998) |