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| Photosynthetic and Morphological Characteristics and Biomass of Five Glycyrrhiza Species |
| Ye Ju1,2,3, Lin Haiming1,3, Qiu Daiyu1,3, Zhang Hanping3,4, Wang Shengyuan3,4, Yan Liben3,4, Zhao Guiliang3,4 |
1. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2. College of Chemistry and Life Science, Qinghai University for Nationalities, Xining 810007, China;
3. Biological Breeding Reserch Institute Radix Glycyrrhiza, Jiuquan 733101, Gansu, China;
4. Space-breeding Demomstration Base, Jiuquan 733101, Gansu, China |
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Abstract Diurnal photosynthetic characteristics, chlorophyll content, carotenoid content of upper leaves, morphological index and biomass of cultivated Glycyrrhiza uralensis, G. inflata, G. pallidiflora, G. glabra and G. eurycarpa were measured. The result indicated that: (1) Diurnal variations of net leaf photosynthetic rate, transpiration rate, water use efficiency and stomatal conductance presented a bimodal curve patterns, the peaks occurred at 12:00 and 16:00, conspicuous midday depression phenomenon occurred at 14:00; intercellular CO2 concentration presented a W pattern, the peaks occurred at 08:00, 14:00 and 18:00, and the valleys occurred at 12:00 and 16:00. Leaf temperature presented a reversed V pattern change, the peak occurred at 14:00 while the valleys occurred at 08:00 and 18:00. Different differences existed among the diurnal mean values of the above photosynthetic factors. (2) Difference existed among chlorophyll-a content, chlorophyll-b content, carotonoid content, chlorophyll-(a+b) content and ratio of chlorophyll-a/chlorophyll-b for the upper leaves of the species, among which, significant difference existed in chlorophyll-a of the species. (3) Differences existed in branch number, leaf number, main stem height, main root length, aboveground dry weight, underground dry weight and biomass of the species. (4) Diurnal mean value of net photosynthetic rate was positively correlated with stomatal conductance, transpiration rate, water use efficiency, leaf temperature and chlorophyll-a content with coefficients of 0.984, 0.977, 0.927, 0.909, 0.933, respectively, but was negatively correlated with intercellular CO2 concentration with a coefficient of -0.972. G. uralensis has higher photosynthetic performance and yield, and is more suitable for large-scale cultivation in this region. The total biomass of G. inflata, G. pallidiflora, G. glabra are large, in addition to the underground parts for medicinal, should strengthen the development and utilization of the above-ground part. Photosynthetic performance, yield and total biomass of G. eurycarpa are low, but it is fresh and tender, so suggest to strengthen the development and utilization of animal husbandry.
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Received: 04 June 2013
Published: 20 March 2014
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Corresponding Authors:
蔺海明（Email：Linhm@gsau.edu.cn）
E-mail: Linhm@gsau.edu.cn
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2014, Vol. 34 
