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- Title
不同钙离子浓度对喜钙和嫌钙型金花茶光合及 生理指标的影响.
- Authors
柴胜丰; 付 嵘; 邹 蓉; 唐健民; 史艳财; 韦记青
- Abstract
In order to explore the physiological adaptation mechanism of calcicole-type golden Camellia to high calciumion environment and analyze the main reasons that the calcifuge-tvpe golden Camellia can not grow on calcareous oil,a pot experiment was conducted with two species of calcicole-type golden Camellia (Camellia multipetala and C. limonia) and two species of caleifuge-type golden Camellia (C nitidissima and C tunghinensis ) seedlings. To exclude the influences from other confounding factors, each pot wan filled with and instead of soil. The seedlings were treated with four Ca levels 5. 25. 50. 100 nmol - L The photosynthetic and physiological indexes of two different types of golden Camellia were measured. The roul were as follows: The net photosynthetic rate (P), stomatal conductance (G), actual photochemical efficiency (OPS I), electron transfer efficiency (ETR), Chla, Chl b and total Chl of the caleifuge-type golden Camellia decreased with the increase of concentration, which indicates that the photosynthetic capacity of these two species decreased under the high calcium in environment: While these indexes in the calcicole-type golden Camellia did not change significantly under different Ca concentrations, indicating high calciumion environment did not affect its normal photosynthesis. The content of malondialdehyde and the PS IT maximum photochemical elliciency (F/F) d the calcifuge-type golden Camellia did not change significantly under high calciumion environment indicating that its photosynthetic membrane system has not been damaged. With the increase of Ca concentration, the proline content of the calcifuge-type golden Camellia increased significantly. while the soluble super content did not change much: The proline and soluble content in calcicole-type golden Camellia were not obviously changed under different Ca" concentration, but the soluble sugar content calcicole-type lokken Camellia was significantly higher than that of the caleifuge-type golden Camellia. Carlisle-type palden Camellia were sot seaitive to the external calciumion concentration, its physiological mechanisms of adaptation to high calciumion may be related to the higher content of soluble sugar in leaves However, the adaptability of calcifuge-type Camellia to high collision environment was poor, which may be the main reason for its inability to grow on calcareous soil. C
- Subjects
CARLISLE (Pa.); PHYSIOLOGICAL adaptation; CHARGE exchange; PHOTOSYNTHETIC rates; CAMELLIAS; CALCAREOUS soils
- Publication
Guihaia, 2021, Vol 41, Issue 2, p167
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaiia.gxzw201911017