补充投喂β-胡萝卜素对不同色系三角帆蚌内壳色、组织总类胡萝卜素含量及生长的影响

Effects of β-carotene supplement in bait on inner shell color,tissue total carotenoids content and growth of different color strains in Hyriopsis cumingii

珍珠与珍珠蚌内壳珍珠层具有相似的形成机制,已发现珍珠颜色与供片蚌内壳色显著相关。该研究以紫色、金色、白色3种色系三角帆蚌(Hyriopsis cumingii)为对象,设置β-胡萝卜素补充实验组和对照组,养殖90 d后比较分析了不同色系三角帆蚌内壳色、组织总类胡萝卜素含量(TCC)及生长变化。结果表明,实验组紫色三角帆蚌内壳色较对照组色差值(dE)提高了21.48%(P<0.05),明度值(L^*)降低了15.72%(P<0.05),色度值(a^*)从0.48升至2.67(P<0.05),色度值(b^*)未见显著变化(P>0.05);实验组金色三角帆蚌内壳色较对照组a^*从0.07升至1.52(P<0.05),b^*从1.37升至4.43(P<0.05),dE和L^*未见显著变化(P>0.05);实验组白色三角帆蚌内壳色各参数较对照组均未见显著变化(P>0.05)。3种色系三角帆蚌实验组肝胰腺TCC均大于对照组(P<0.05);紫色和金色实验组外套膜TCC较对照组分别提高了55.29%和39.69%(P<0.05),白色实验组较对照组未见显著变化(P>0.05)。实验组3种色系三角帆蚌各生长性状均大于对照组(P<0.05)。研究结果证实补充β-胡萝卜素可提升三角帆蚌的内壳色和促进生长,为珍珠养殖技术优化提供理论依据。

Pearl and nacre share a similar mechanism of formation.It has been found that there is a significant correlation between the color of pearl and that of nacre.In this study,three stains of Hyriopsis cumingii in purple,golden and white were examined.Experimental groups and control groups with supplementation ofβ-carotene were set up.After 90 d of cultivation,the color of nacre of the three stains,total carotenoid content(TCC)of their organs,and their changes in growth were compared and analyzed.The results show that compared with the control group,for purple H.cumingii,the dE value increased by 21.48%(P<0.05);L^*value decreased by 15.72%(P<0.05);a^*value increased from 0.48 to 2.67(P<0.05)and there was no significant change in b^*value(P>0.05).For golden H.cumingii,the a^*and b*values increased from 0.07 to 1.52 and from 1.37 to 4.43,respectively(P<0.05),and there was no significant change in the dE and L^*values(P>0.05).For white H.cumingii,there was no significant change in any of the parameters(P>0.05).The hepatopancreas TCCs of the experimental groups of the three color stains were greater than those of the control groups(P<0.05).Compared with the control group,for purple and golden H.cumingii,the TCCs of edge mantle increased by 55.29%and 39.69%,respectively(P<0.05),while for white H.cumingii,there was no significant change(P>0.05).All the growth traits of the three color strains were larger than those of the control groups(P<0.05).The results confirm that supplementingβ-carotene can enhance the color of nacre and growth of H.cumingii,which provides a theoretical basis for optimizing the pearl culture technology.