| 摘要: |
| 以杜鹃红山茶和3个山茶栽培品种（‘帕克斯先生’、‘孔雀椿’和‘贝拉大玫瑰’）5年生地栽嫁接苗为试验材料，分别测定它们光合日变化特性曲线。结果表明：供试的4种山茶Pn和Tr日变化均为单峰曲线，且Pn的峰值主要出现在午前，Tr的峰值则在不同山茶间存在差异；4种山茶中，杜鹃红山茶的日均WUE最高；Pn、Tr与各生理生态因子间的相关性分析说明Gs对光合特征参数的变化影响最大，且对Pn起决定性作用，是影响光合作用的限制因子；PARi与杜鹃红山茶和‘贝拉大玫瑰’的Pn成显著正相关。本研究，从理论上解释了杜鹃红山茶是一种适应能力极强的山茶原种。 |
| 关键词: 杜鹃红山茶 光合日变化 光合特征参数 |
| DOI： |
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| A Research on the Characteristics of Photosynthetic Diurnal Variations of Camellia azalea and Three Camellia Cultivars |
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liuyuling
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| Abstract: |
| The experimental materials were the 5 years old grafted plants of Camellia azalea and 3 camellia cultivars (‘Dr. Clifford Parks’, ‘Hakuhan Kujaku’ and ‘Niuccio’s Bella Rossa’) which were growing in the ground. Their characteristics of photosynthesis diurnal variations were tested respectively. The results showed that: Diurnal variation of Pn (net photosynthetic rates) and Tr (transpiration rates) were single-peak curve, the peak of Pn mainly occurred before noon, and the peak of Tr were different among the camellias tested; the daily average of WUE of Camellia azalea was the highest in the 4 camellias; The correlations among the Pn, Tr and the factors on physiology and ecology showed that Gs was maximal to the influence on the change of photosynthetic characteristic parameters and had a major role to the Pn. So, Gs was a limited factor to photosynthesis. PARi was a positively correlative significantly to Pn of Camellia azalea and ‘Niuccio’s Bella Rossa’. Through the research, Camellia azalea had been proved as a highly adaptable camellia species on theory. |
| Key words: Camellia azalea Diurnal variation Photosynthetic characteristic parameters |
