The Effect of Periodic Abrupt Change in Light Intensity and Constant Light Intensity on Na+-K+-Atpase Activitiy in Litopenaeus Vannamei
GUO Biao
SONG Wenping
XIAO Guangxia
ZHENG Debin
Wang Shuo
Wang Yu
Abstract：Four periodic fluctuation light intensity treatments (600~60 lx,1500~60 lx,3000~60 lx and 6000~60 lx)and five constant light intensity treatments (60 lx,600 lx,1500 lx,3000 lx,6000 lx) were arranged to investigate the effect of periodic abrupt change in light intensities and constant light intensities on Na+-K+-ATPase.After assay and analyze the Na+-K+-ATPase activity,it can be found that:the fluctuation of Na+-K+-ATPase had certain rhythmicity,but the rhythmicity in different light intensity regimes were difference.The Na+-K+-ATPase activity increased rapidly when light intensity abrupt changed with a more light amplitude,then it decreased gradually;after hours the Na+-K+-AT-Pase activity increased gradually again.The average activities of Na+-K+-ATPase were different in dif-ferent light intensity regimes,the average activities of Na+-K+-ATPase of shrimps in treatment 1500 lx were lowest,the reason for those results maybe that shrimps in light treatment 1500 lx were in a physi-ological equilibrium,and the osmoregulation and ion transportation were in a lower level.The average activities of Na+-K+-ATPase of shrimps in treatment 3000~60 lx and 6000~60 lx were significantly lower than those in the corresponding constant treatment 60 lx,3000 lx and 6000 lx,the reason may be that the metabolism and effectiveness of the enzyme were different.
Keywords：light intensityperiodic fluctuationLitopenaeus vannameiNa+-K+-ATPase
Publication Date：2014-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 73-81 )