| Autor: |
Chu R; College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070, China., Chen NL; College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070, China. |
| Jazyk: |
čínština |
| Zdroj: |
Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2017 Nov; Vol. 28 (11), pp. 3515-3520. |
| DOI: |
10.13287/j.1001-9332.201711.006 |
| Abstrakt: |
The effects of different intensities of UV-B radiation on photosynthetic characteristics, photosynthetic pigment content and chloroplast ultrastructure of Phragmites australis were studied in this paper. The results showed that enhanced UV-B radiation significantly reduced the net photosynthetic rate, stomatal conductance and transpiration rate, and the degree of degradation increased with the increasing irradiation intensity. The intercellular CO 2 content increased and the photosynthetic efficiency decreased significantly compared with the control. Enhanced UV-B radiation decreased photosynthetic pigment contents, including chlorophyll a, chlorophyll b, total chlorophyll and carotenoid, and the decrement increased with the increasing irradiation intensity. Under the enhanced UV-B radiation treatment, chloroplast structure was damaged, and thylakoid lamellae was disorde-red, swelling and even blurred. The effect of high intensity of radiation on chloroplast ultrastructure was greater than that of lower intensity of radiation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
