| 引用本文： |
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熊忠臣,骆文华,王满莲,王代容,文香英.金花茶与其伴生植物光合特性的比较研究[J].广西科学,2012,19(2):201-204. [点击复制]
- XIONG Zhong-chen,LUO Wen-hua,WANG Man-lian,WANG Dai-rong,WEN Xiang-ying.Comparative Study on Photosynthetic Characteristics of Camellia nitidissima and Its Accompanying Species[J].Guangxi Sciences,2012,19(2):201-204. [点击复制]
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| 摘要: |
| 采用LI-6400便携式光合测定系统对防城金花茶国家级自然保护区的金花茶(Camellia nitidissima)和两种伴生植物九节木(Psychotria rubra)和华润楠(Machilus chinensis)的成熟叶片进行光合测定,比较他们的光合特性。结果表明,金花茶的光饱和光合速率、光饱和点和表观量子效率均显著低于两种伴生植物,光补偿点显著高于伴生植物;大部分光强下,金花茶的净光合速率和蒸腾速率均低于两种伴生植物,而水分利用效率高于两种伴生植物。说明保守的水分利用方式,不利于光合速率的提高;较低的光合能力和较窄的光强适应范围使金花茶在群落竞争中处于不利地位。 |
| 关键词: 金花茶 净光合速率 蒸腾速率 水分利用效率 |
| DOI： |
| 投稿时间：2012-04-07 |
| 基金项目:国家自然科学基金项目(31160137),广东省中国科学院全面战略合作项目(2009B091300137),广西科技成果转化和应用项目(桂科攻11233013-15),广西培养新世纪学术和技术带头人专项资金项目和国际植物园保护联盟(BGCI)项目(R4331)资助。 |
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| Comparative Study on Photosynthetic Characteristics of Camellia nitidissima and Its Accompanying Species |
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XIONG Zhong-chen1, LUO Wen-hua1, WANG Man-lian1, WANG Dai-rong2, WEN Xiang-ying3
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| (1.Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, Guilin, Guangxi, 541006, China;2.Flower Research Institute, Gungdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China;3.South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou, Guangdong, 510650, China) |
| Abstract: |
| Photosynthetic characteristics of leaves in Camellia nitidissima and its accompanying species Psychotria asiatica and Machilus chinensis located in Fangcheng National Camellia Natural Reserve were studied with LI-6400 portable photosynthesis system. Comparative study was conducted in photosynthetic characteristics of Camellia nitidissima and accompanying species. The gas exchange was measured in the field with LI-6400 Portable Photosynthesis (LI-Cor Inc., USA). The results showed that the PPFD-saturated photosynthetic rate, light saturation point and apparent quantum yield of C. nitidissima were significantly lower than that of two accompanying species, but it's light compensation point was significantly higher than that of accompanying species. Under a majority of light, the net photosynthetic rate and transpiration rate of C. nitidissima were lower than that of two accompanying species, and the water use efficiency was more higher. The conservative mode of water utility affected the increasing of the net photosynthetic rate of C. nitidissima. C. nitidissima was in a disadvantaged status in the community with lower photosynthetic capacity and narrower adaptable range of light than its neighboring species. |
| Key words: Camellia nitidissima net photosynthetic rate transpiration rate water use efficiency |
