Photosynthetic physiological characteristics of Angelica dahurica var.formosana from Sichuan province in different growth years.
10.19540/j.cnki.cjcmm.20190129.012
- Author:
Yi-Jie JIANG
1
;
Mei-Yan JIANG
1
;
Yun-Qiu ZHOU
1
;
Chen CHEN
1
;
Kai HOU
1
;
Wei WU
1
Author Information
1. College of Agriculture,Sichuan Agricultural University Chengdu 611130,China.
- Publication Type:Journal Article
- Keywords:
Angelicae dahuricae var. formosana;
fitting model;
growth years;
light response curve;
photosynthetic characteristics
- MeSH:
Angelica;
physiology;
Carbon Dioxide;
China;
Photosynthesis;
Plant Leaves;
physiology;
Plant Transpiration;
Seasons;
Temperature
- From:
China Journal of Chinese Materia Medica
2019;44(8):1524-1530
- CountryChina
- Language:Chinese
-
Abstract:
In this study,the leaves of autumn-sown Angelica dahurica var. formosana from Sichuan province in different growth years was used to explore the fitting model of photosynthetic response curve and the different photosynthetic physiological characteristics between annual and biennial A. dahurica var. formosana from Sichuan province. The results showed that the fitting model of the optimum light response curve of the leaves of A. dahurica var. formosana from Sichuan province with different growth years was all rectangular hyperbolic correction model. The light saturation points were 1 600,1 700 μmol·m-2·s-1,the light compensation points were17. 98,52. 23 μmol·m-2·s-1 in the leaves of annual and biennial plant,respectively. The diurnal variation curves of net photosynthetic rate,transpiration rate and stomatal conductance in the leaves all acted as a single peak value wave. The daily mean values of net photosynthetic rate and transpiration rate in the leaves of biennial plant were significantly higher than that of annual plant. There was no significant difference in daily mean stomatal conductance. The net photosynthetic rate was significantly positively correlated with stomatal conductance in both of the different growth years. The net photosynthetic rate of annual and biennial A. dahurica var. formosana from Sichuan province had extremely significant and significantly negative correlation with the intercellular CO2 respectively. The transpiration rate of annual plant was positively correlated with the effective photosynthetic radiation intensity and air temperature,but had significantly negative correlation with the intercellular CO2 concentration. The transpiration rate of biennial plant had extremely positive correlation with the effective photosynthetic radiation intensity,and negatively correlated with the intercellular CO2 concentration. In conclusion,the photosynthetic efficiency of the leaves in biennial plant of A. dahurica var. formosana from Sichuan province was higher than that in annual plant,but the ability to utilize weak light was lower than that of annual plant. It should be planted in the sunny field.
