释义 |
photoreceptor Biol.|ˈfəʊtəʊrɪsɛptə(r)| Also with hyphen. [f. photo- 1 + receptor.] Any living structure which responds to incident light, esp. a cell in which light is absorbed and converted to a nervous or other signal.
1906C. S. Sherrington Integrative Action Nervous Syst. ix. 334 The free-swimming Ascidia with fin-like motor organs and semi-rigid aerial notochord..bears at its anterior end a well-formed photo-receptor organ (eye) and a well-formed otocyst (head proprio-ceptor). 1944Electronic Engin. XVII. 189/3 The retina consists of ten layers, in the third of which are embedded the photo⁓receptors. 1964[see below]. 1969F. E. Round Introd. Lower Plants ii. 14 The locomotory flagellum [of the alga Euglena]. It has a..swelling, the ‘photoreceptor’, near its entry into the cell. 1974Photochem. & Photobiol. XIX. 435/1 The question as to the identity of the photo⁓receptor pigment (carotenoids or flavins) for phototropism in higher plants has not been resolved. So ˈphotoreception, the process of absorption, and esp. of detection, of light by an animal or plant; ˈphotoreceptive a., able to respond to light; of or pertaining to photoreception.
1906C. S. Sherrington Integrative Action Nervous Syst. ix. 334 The elaborateness of the photo-receptive organs of the flying Insecta corresponds with the great power of these forms to traverse space. 1908Amer. Jrnl. Physiol. XXI. 198 The immediate results following the destruction of photo-reception in one eye are: (1) The production of rapid rotations..on the longitudinal axis of the body, [etc.]. 1943Vitamins & Hormones I. 211 Ordinarily these organisms contain a structure which appears to be specifically concerned with photoreception, the stigma or eye-spot. 1964Ann. N.Y. Acad. Sci. CXVII. 211 Red rays can penetrate to the hypothalamus with a sufficient intensity to activate the deeper photo⁓receptive structures. 1964Oceanogr. & Marine Biol. II. 403 The photoreceptor pigment is unknown... That in Diadema..has an absorption maximum in its acid form at 462/63 mµ, but whether it is involved in the photoreceptive process is as yet unknown. 1973J. J. Wolken in L. P. Miller Phytochem. I. ii. 26 Experimental observations..indicated that the photosynthetic process was not a simple photoreception sensitized by chlorophyll. |