[Research on growth state and physiological changes of Epimedium wushanense under different shade conditions].
OBJECTIVE
To study the growth state and physiological changes of Epimedium wushanense under different light conditions (100%, 80%, 60%, 40%, 20%), and investigate its adaptation mechanism to shade environment so that it can provide theoretical basis for cultivation and production.


METHODS
The growth index, the content of photosynthetic pigments, proline content, MDA content, soluble sugar content, soluble protein content and antioxidant enzymy activity of E. wushanense under different shade conditions were measured.


RESULTS
Except for length/width, the other form index of E. wushanense changed significantly. The E. wushanense grew well between light intensity 80%-40%, besides, the biomass above the earth was relatively high. The chlorophyll a, chlorophyll b, total chlorophyll content and carotenoids cotent were enhanced after shaded, the values of chlorophyll a\chlorophyll b increased between light intensity 100% -60% and reduced between light intensity 60% -20%. The proline and MDA content decreased after shading, the soluble sugar and soluble protein content increased respectively between light intensity 100% -60%, 100% -40% and reduced respectively between light intensity 60% -20%, 40% -20%. The SOD activity, CAT activity decreased after shading, and the POD activity, APX activity reduced between light intensity 60% -40%, raised under 20% treatment.


CONCLUSIONS
80% 40% irradiance treatment was favorable to the growth of E. wushanense.
ChinaWest Normal University, Key Laboratory of Southwest China Wildlife Resources Conservation, Nanchong 637002, China.
Hui
H
Wang
Yunxiang
Y
Li
Qiumei
Q
Quan
Gang
G
Zhao
Yayun
Y
Tong
Yong
Y
Nie
D002374:Catalase / Q000378:metabolism; D034181:Epimedium / Q000737:chemistry / Q000502:physiology*; D008027:Light; D009195:Peroxidase / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
D002374:Catalase; D009195:Peroxidase; D013482:Superoxide Dismutase