[1] SUN Tao LEI Ruixiang LIU Yong PEI Qingqing,.Study on Relationship Between Woerqi Photosynthesisand Environmental Factors [J]. Journal of Shaanxi University of Traditional Chinese Medicine, 2022, (04): 21-26. [doi: 10.13424/j.cnki.jsctcm.2022.04.005]
Study on Relationship Between Woerqi Photosynthesisand Environmental Factors
- Article number:
- 2096-1340(2022)04-0021-06
- Keywords:
- Key words：Wo’erqi; Stomatal conductance; Daily variation; Stomatal restriction; Net photosynthetic rate
- ZTFLH:
- R284
- Code:
- A
- Abstract:
- Abstract： Objective To study the characteristics of photosynthetic response and the relationship between diurnal variation of photosynthetic parameters and environmental factors in leaves of Wo’erqi. Methods The diurnal changes of photosynthetic parameters in leaves of woerqi were measured by portable photosynthetic analyzer，and orthogonal data processing and analysis were carried out by Excel 2007 and SPSS 20.0 software. Results The diurnal changes of net photosynthetic rate (Pn) and stomatal conductance (Gs) in leaves of woerqi showed a “single peak” curve，and there was a weak “noon break” phenomenon；The maximum value of net photosynthetic rate was 16.21 μmol·m-2·s-1，and the maximum value of stomatal conductance was 0.56 μmol·m-2·s-1 at 11 oclock. Net photosynthetic rate (Pn) was positively correlated with photosynthetic active radiation (PAR)，intercellular CO2 concentration (Ci)，transpiration rate (Tr) and stomatal conductance (Gs)，and negatively correlated with air relative humidity (RH) and stomatal limitation (Ls). Conclusion Woerqi is a stomatal restricted plant，and there is a weak phenomenon of “photosynthetic noon break” in net photosynthetic rate. Photosynthetic effective radiation，intercellular CO2 concentration，transpiration rate and stomatal conductance are the main influencing factors on net photosynthetic rate (PN) of leaves of woerqi. This study provides a scientific reference for the cultivation of woerqi，improves the quality and yield of medicinal materials，and is of great significance for the cultivation and development of wo’erqi.
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Memo
基金项目：陕西省自然科学基础研究计划项目（2017JM8111）；2019年医疗服务与保障能力提升补助资金项目（中医药事业传承与发展部分第四次全国中药资源普查项目）［财社(2019)39号］