Effects of Tetranychus cinnabarinus stress on photosynthesis and chlorophyll fluorescence properties of cassava seedling

The paper studied the photosynthesis and chlorophyll fluorescence parameters of cassava seedling after Tetranychus cinnabarinus harm. The results showed that: compared with control，the Pn，Tr，Gs，Fm， Fv/Fm of cassava declined，Pn decreased to 2.57-7.62 umol/m2·s，Tr decreased to 0.13-1.28 mmol/m2·s ，Gs decreased to 0.020-0.176 umol.m2·s，Fm decreased to 0.031-0.241，Fv/Fm decreased to 0.037-0.11，while Ci and Fo increased，Ci increased to 3.51-158.5 μmol/mol，Fo increased to 0.023-0.09. There was no difference in the photosynthetic traits and parameters of chlorophyll fluorescence of four cassave varieties.