Abstract: This paper studied the relationships between kaempferol content in Hippochaete hiemale from Changbai Mountains and spectral reflectance parameters, ai med to establish a shortcut method for judging the medicinal quality of this pla nt. According to the spectral reflectance parameters derived from the reflectanc e spectral curves determined by Unispec-Sc spectral analysis system, cluster an alysis was conducted for H. hiemale samples. The correlation analysis between the kaempferol content of this plant determined by HPLC and the spectral reflectanc e parameters showed that the kaempferol content had significant negative correla tions with the area of blue edge (SDb) (r=-0991) and the reflectance of gr een peak (Rg) (r=-0982), as well as with the reflectance of 530〖KG-*2〗-〖KG-*7〗570 nm ( ︱r︱>095). As a result, the medicinal quality of H. hiemale from Changbai Mountains could be judged rapidly by comparing the SDb and Rg. Fur thermore, to strengthen the incident light of 530〖KG-*2〗-〖KG-*7〗570 nm could stimulate the increase of kaempferol content in Hippochaete hiemale, but it needs to be confirmed by field test.

Key words: AM fungi, Drought tolerance, Protective system, Citrus, Grafting seedling