Study on Photosynthetic Light Response Characteristics of Anthocyanin-Type Sweet Potato in Different Growth Periods
Zhang Lei
Liu Weizheng
Xin Guosheng
Han Junjie
Shang Lili
Qiu Pengfei
Lin Zujun
Abstract：In this experiment , the photosynthetic light response and photosynthetic parameters of three anthocyanin-type sweet potato varieties , Yanzishu 2 ( Y2) , Yanzishu 3 ( Y3) and Japanese purple sweet po-tato ( RZ) , in different growth periods were studied .The results showed that the maximum net photosynthetic rate (Pnmax) of anthocyanin-type sweet potato as the largest in the initial root -enlargement period, and then rapid root -enlargement period , late root -enlargement period in order .The differences between different growth periods were significant ( P<0 .05 ) .The initial quantum efficiency (α) of latter root-enlargement period was much bigger than the initial value , but the light saturation point ( Isat ) was opposite.The differ-ences in light compensation point (Ic) and dark respiration rate (Rd) between different growth periods were not significant .Compared between different varieties , RZ had the highest αand R d in the rapid enlargement period of root, followed by Y2 and Y3;Y3 had the hightest Isat.In the late growth period, the Pnmax and Isat of RZ were all significantly higher than those of Y2 and Y3, but Rd of RZ was the lowest .
Keywords：Anthocyanin -type sweet potatoDifferent growth periodsPhotosynthetic light responseMaximum net photosynthetic rate ( Pnmax )
Publication Date：2015-05-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 23-26 )