[Studies on the shade-endurance capacity of Glycyrrhiza uralensis].
OBJECTIVE
To study the shade-endurance property of Glycyrrhiza uralensis and provide rationale for the practice of inter-cropping G. uralensis with trees.


METHODS
Black shading nets were used to provide five different environments of light intensities (light penetration rates of 100%, 75%, 65%, 50% and 25%, respectively). To assess the shade-endurance capacity of G. uralensis, several aspects were evaluated, including growth characters, physiological and ecological characters, biomass, and chemical contents.


CONCLUSIONS
G. uralensis is a light-favored plant. The growth indices such as plant height, stem diameter, leaves number, root diameter, biomass, and daily average photosynthetic rate (Pn) are highest when light permeation rate is 100%. All these indices decrease when light intensity decreases. However, G. uralensis possesses shade-endurance capacity to some degree; it adapts to the shading environment by increasing the leaf area and chlorophyll contents. Shading has no obvious effect on the absolute light energy utilization rate (Eu) or Fv/Fm ratio. The influence of shading on the chemical contents of G. uralensis is obvious.
Wei
Sheng-li
SL
Forestry Resources and Environments College, Northeast Forestry University, Harbin 150040, China.
Wang
Wen-quan
WQ
Chen
Xiu-hua
XH
Qin
Shu-ying
SY
Chen
Xiu-tian
XT
D000222:Adaptation, Physiological; D002734:Chlorophyll / Q000032:analysis*; D006034:Glycyrrhetinic Acid / Q000032:analysis*; D029882:Glycyrrhiza uralensis / Q000737:chemistry / Q000254:growth & development* / Q000502:physiology; D010788:Photosynthesis; D035261:Plant Components, Aerial / Q000033:anatomy & histology; D018515:Plant Leaves / Q000033:anatomy & histology / Q000737:chemistry / Q000502:physiology; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development / Q000502:physiology; D013472:Sunlight; D014197:Trees / Q000254:growth & development
D002734:Chlorophyll; D006034:Glycyrrhetinic Acid