《植物生理学报》 2013, 49(8): 738-742
通信作者：房义福；E-mail: email@example.com；Tel: 0531-88557741
摘 要：以36种8年生欧美观赏海棠为研究对象, 测量其树高和地径指标, 用CIRAS-2光合仪测定并计算其净光合速率Pn、饱和光强SL、光补偿点LCP、暗呼吸速率Rd、表观量子效率AQY等光合参数, 以了解供试海棠的光合生理特性。结果显示, 供试欧美观赏海棠树高和地径生长量、光合生理特性存在明显差异。在36种海棠中, ‘奈微利考伯曼’、‘珠穆朗玛’和‘红丽’等9种海棠Pn较高, 对应树高和地径也表现出较大生长量; ‘珠穆朗玛’和‘奈微利考伯曼’等8种海棠SL较高, 表明对强光的适应性较强, 为喜光性品种; ‘印第安魔力’和‘绚丽’海棠AQY最高, 说明其叶片转化光能的效率高, 并且对弱光的利用能力较强。这些数据为欧美观赏海棠在园林绿化中的合理配置与栽培提供了理论依据。
关键词：观赏海棠; 生长; 光合生理特性; 光合速率
Corresponding author: FANG Yi-Fu; E-mail: firstname.lastname@example.org; Tel: 0531-88557741
Abstract:To probe into light requirement for 36 species of Euramerican ornamental crabapples, the growth in-dexes, height and ground diameter, and photosynthetic parameters such as maximum photosynthetic rate (Pn), satuation light intensity (SL), light compensation point (LCP), dark respiration (Rd) and apparent quantum yield (AQY) were measured and analyzed. There were obvious differences in the height and ground, photosynthetic characteristics among the materials. For the 36 crabapples, nine species including ‘Neville Copeman’, ‘Ever-este’ and ‘Red Splender’ were possessed of higher Pn, and the mass of growth were also more than other spe-cies. The higher SL of the eight crabapples, such as ‘Neville Copeman’ and ‘Evereste’, suggested that they were adapted to high-intensity light and belonged to sun-loving species. The highest AQY of ‘Indian Magic’ and ‘Ra-diant’ implied that the efficiency of light energy conversion was high and low-intensity light could be used ef-fectively in their leaves. These data will be useful to the reasonable allocation and cultivation of Euramerican ornamental crabapples in the landscape.
Key words: ornamental crabapples; growth; photosynthetic characteristics; photosynthetic rate
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