OBJECTIVETo 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.

METHODThe 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.

RESULTExcept 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.

CONCLUSION80% 40% irradiance treatment was favorable to the growth of E. wushanense.

Catalase ; metabolism ; Epimedium ; chemistry ; physiology ; Light ; Peroxidase ; metabolism ; Superoxide Dismutase ; metabolism

OBJECTIVETo study the growth index and physiological index of Tianquan Bergenia purpurascens under different shade 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.

METHODThe growth index such as the length, the width and the number of new leaves, and leaf area, fresh weight, dry weight and specific leaf weight of the samples which were collected from the beginning of March to late May under different shade conditions were measured. The physiological index including the contents of photosynthetic pigments, MDA, soluble sugar, soluble protein, proline and the activity of SOD were measured all together.

RESULTThe growth and morphological index under light intensity 100%-60% were higher than those under light intensity 40%-20%. And except specific leaf weight, the growth and morphological index were significantly higher under light intensity 60% than those under the other shade conditions; The contents of Chla, Chlb, Chl (a + b) and Car under light intensity 100%-60% were higher than those under light intensity 40%-20%, while Chla/b was higher under light intensity 40%-20%; The activity of SOD, soluble sugar, soluble protein and proline contents were higher under light intensity 100%-60%, while MDA content was higher under light intensity 40%-20%. Chl(a+b) content, soluble sugar content and activity of SOD were the highest under light intensity 60%, but MDA content was the lowest.

CONCLUSIONSixty percent irradiance treatment was the most favorable to the growth of Tianquan B. purpurascens; 100%-80% irradiance treatments were favorable to its growth; 40%-20% irradiance treatment was negative for its growth.

Chlorophyll ; analysis ; metabolism ; Light ; Photosynthesis ; Plant Extracts ; analysis ; metabolism ; Plant Leaves ; chemistry ; growth & development ; metabolism ; radiation effects ; Saxifragaceae ; chemistry ; growth & development ; metabolism ; radiation effects