With the appearance of eutherian mammals,3 visual pigments were retained in their retina,mediating light sensitivity.Of them,rhodopsin is expressed in rod photoreceptor celis to conduct dim-light vision,while the othe...With the appearance of eutherian mammals,3 visual pigments were retained in their retina,mediating light sensitivity.Of them,rhodopsin is expressed in rod photoreceptor celis to conduct dim-light vision,while the other 2 visual pigments,middle/long wavelength-sensitive(M/LWS)and short wavelength-sensitive type 1(SWS1)visual pigments,expressed in cones are for color vision(Chi et al.2020).Murid rodents(order Rodentia:family Muridae),originated 17-22 million years ago(Mya)and represent more than 10%of living mammal species(Aghova et al.2018).Within these murid species,their SWS1 pigment retained the ancestral ultraviolet(UV)sensitivity,which is generally associated with a nocturnal lifestyle(Emerling et al.2015).In contrast,the spectral sensitivities of murid M/LWS are more diversifed,with wavelengths of maximum absorption(amax)ranging from 490 to 509 nm(Yokoyama et al.2008;Chi et al.2020).展开更多
基金supported by the Natural Science Basic Research Program of Shaanxi(2022JQ-169)the China Postdoctoral Science Foundation(2021M702063)to S.S.,the National Natural Science Foundation of China(32270462)the Fundamental Research Funds for the Central Universities(GK202401001)to Y.L.
文摘With the appearance of eutherian mammals,3 visual pigments were retained in their retina,mediating light sensitivity.Of them,rhodopsin is expressed in rod photoreceptor celis to conduct dim-light vision,while the other 2 visual pigments,middle/long wavelength-sensitive(M/LWS)and short wavelength-sensitive type 1(SWS1)visual pigments,expressed in cones are for color vision(Chi et al.2020).Murid rodents(order Rodentia:family Muridae),originated 17-22 million years ago(Mya)and represent more than 10%of living mammal species(Aghova et al.2018).Within these murid species,their SWS1 pigment retained the ancestral ultraviolet(UV)sensitivity,which is generally associated with a nocturnal lifestyle(Emerling et al.2015).In contrast,the spectral sensitivities of murid M/LWS are more diversifed,with wavelengths of maximum absorption(amax)ranging from 490 to 509 nm(Yokoyama et al.2008;Chi et al.2020).
