广布种香附子坪用价值评价与水分胁迫形态生理响应
Evaluation of Turf Value and Morphological and Physiological Response to Water Stress of Cyperus rotundus L.

目的：比较香附子在淹水和干旱胁迫下的抗性生理和叶片表皮细胞形态的响应，为野草香附子应用于抗旱和抗涝性坪用植被提供依据。方法：本实验对香附子各项指标进行坪用价值分析；采用双套盆法对野草香附子进行淹水(S)、持续干旱(G)和正常供水(CK)共3个处理的水分胁迫试验，分别于处理7d后测定野草香附子的各项生理指标；在大田条件下，采用景观–生态–应用草坪质量评价体系，综合评价野草香附子的草坪应用价值。结果：结果表明，香附子的坪用价值较高，适宜作草坪植物；香附子在不同水分胁迫下，各项形态指标表现出显著差异，其中干旱胁迫和淹水胁迫下香附子的MDA含量比CK下降8.4%和11.4%，SOD活性比CK分别上升7.2%和16.6%，Pro含量比CK分别上升18.9%和21.5%。结论：野草香附子能够适应较严酷的淹水环境和干旱环境，且更加耐淹水胁迫，野草香附子可以适应我国干旱和多雨地区园林草坪建植种推广种植。
Objective: To compare the resistance physiology and leaf epidermal cell morphology response of Cyperus rotundus L. under flooding and drought stress, and provide the basis for the application of Cyperus rotundus L. to drought and waterlogging resistant flat vegetation. Method: In this experiment, the application value of each index of Cyperus rotundus L. is analyzed. Water stress tests were carried out on Cyperus rotundus L. with three treatments: Flooding (S), persistent drought (G) and normal water supply (CK), and the physiological indexes of Cyperus rotundus L. were determined after 7 days of treatment, and the morphology of epidermal cells of its leaves was observed. Under the field condition, the landscape-ecology-application lawn quality evaluation system was adopted to comprehensively evaluate the application value of Cyperus rotundus L. lawn. Result: The results showed that Cyperus rotundus L. had a higher value in lawn and was suitable for lawn plant; under different water stress, the plant morphological indexes showed significant differences. Under drought stress and flooding stress, MDA content decreased by 8.4% and 11.4%, SOD activity increased by 7.2% and 16.6%, and Pro content increased by 18.9% and 21.5%, respectively, compared with CK. The number of stomata in the lower epidermis of Cyperus rotundus L. under flooding stress was similar to that in the normal water supply group. The number of stomata decreased obviously in drought stress group. The number of cells in the upper epidermis was the highest in the drought stress group, followed by the normal management group, and the lowest in the flooded group. In the comparison of upper epidermal cell length, the flooded group was the longest, followed by the normal management group, and the drought stress group was the shortest. Conclusion: Cyperus rotundus L. can adapt to harsher waterlogged environment and drought environment, and more tolerant to waterlogged stress, Cyperus rotundus L. can adapt to China’s arid and rainy areas of garden lawn planting and promotion of planting.