| 越南多毛金花茶的光合特性和叶解剖结构对光照环境的适应 |
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| 引用本文： | 王坤,韦晓娟,刘凯,李开祥,马锦林.越南多毛金花茶的光合特性和叶解剖结构对光照环境的适应[J].林业科学研究,2019,32(4):105-113. |
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| 作者姓名： | 王坤 韦晓娟 刘凯 李开祥 马锦林 |
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| 作者单位： | 广西林业科学研究院经济林所, 广西特色经济林培育与利用重点实验室, 广西 南宁 530002,广西林业科学研究院经济林所, 广西特色经济林培育与利用重点实验室, 广西 南宁 530002,广西林业科学研究院经济林所, 广西特色经济林培育与利用重点实验室, 广西 南宁 530002,广西林业科学研究院经济林所, 广西特色经济林培育与利用重点实验室, 广西 南宁 530002,广西林业科学研究院经济林所, 广西特色经济林培育与利用重点实验室, 广西 南宁 530002 |
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| 基金项目： | 广西特色经济林培育与利用重点实验室自主研究课题（19-A-03-01）；国家林业局948项目（2014-4-14）；2016年自治区级林业技术推广示范项目（桂林科发〔2016〕2号） |
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| 摘 要： | 目的]以越南多毛金花茶(Camellia hirsuta Hakoda et Ninh)为实验材料,开展不同光照处理对多毛金花茶光合特性、叶解剖结构及光合色素含量的影响研究,为越南金花茶引种栽培和抚育管理提供理论依据。方法]于2017年5月上旬,将越南多毛金花茶置于不同光照强度(10%、20%、30%、40%、50%,通过覆盖不同层数的遮荫网获得)的遮荫棚内生长,处理时间2个月。结果]不同光照处理下,多毛金花茶净光合速率日变化趋势不同,20%、30%光照处理显著提高了多毛金花茶叶片净光合速率、蒸腾速率,同时蒸汽压亏缺降低,促进光合作用的进行,达到显著差异(P0.05);在30%光照处理下,光合色素的含量最高,而叶绿素a/b的值最低,30%光照更有利于多毛金花茶叶片中叶绿素b的合成。20%、30%光照处理下的多毛金花茶叶片具有更发达的栅栏组织、海绵组织及更厚的叶片厚度,这2个处理的叶片结构可能有利于其对环境的适应并且光合能力更强。在适当的遮荫条件20%～40%光照处理下,多毛金花茶的最大净光合速率增大。结论]在20%、30%光照处理下,其叶片具有更发达的叶片厚度和栅栏组织,气孔密度相对较低,净光合速率、蒸腾速率得到提高,胞间CO_2浓度和蒸汽压亏缺降低,CO_2和水蒸气进出气孔阻力变小,同时在30%光照处理下光合色素的含量最高,说明光合速率得到有效提高。越南多毛金花茶适宜在20%～30%光照强度的环境下生长。
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| 关 键 词： | 越南多毛金花茶 光照处理 光合特性 叶解剖结构 |
| 收稿时间： | 2019/1/17 0:00:00 |
| 修稿时间： | 2019/4/10 0:00:00 |
Response of Photosynthesis Characteristics and Leaf Anatomical Structure of Vietnam Camellia hirsuta under Different Light Environment |
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| WANG Kun,WEI Xiao-juan,LIU Kai,LI Kai-xiang and MA Jin-lin.Response of Photosynthesis Characteristics and Leaf Anatomical Structure of Vietnam Camellia hirsuta under Different Light Environment[J].Forest Research,2019,32(4):105-113. |
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| Authors: | WANG Kun WEI Xiao-juan LIU Kai LI Kai-xiang and MA Jin-lin |
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| Institution: | Guangxi Forestry Research Institute, Guangxi Key Laboratory for Cultivation and Utilization of Special Non-Timber Forest Crops, Nanning 530002, Guangxi, China,Guangxi Forestry Research Institute, Guangxi Key Laboratory for Cultivation and Utilization of Special Non-Timber Forest Crops, Nanning 530002, Guangxi, China,Guangxi Forestry Research Institute, Guangxi Key Laboratory for Cultivation and Utilization of Special Non-Timber Forest Crops, Nanning 530002, Guangxi, China,Guangxi Forestry Research Institute, Guangxi Key Laboratory for Cultivation and Utilization of Special Non-Timber Forest Crops, Nanning 530002, Guangxi, China and Guangxi Forestry Research Institute, Guangxi Key Laboratory for Cultivation and Utilization of Special Non-Timber Forest Crops, Nanning 530002, Guangxi, China |
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| Abstract: | Objective] Vietnam Camellia hirsuta were used as experimental materials to study the effect of different light treatments on the photosynthetic characteristics and anatomical structure of C. hirsuta in order to provide references for introduction, cultivation and management of the species.Method] In early May of 2017, the Vietnam C. hirsuta plants were grown in the shade sheds with different light intensity and the trials lasted for two months. The light intensities of 10%, 20%, 30%, 40%, and 50% were obtained by covering the shading net of different layers.Result] The variation trend of the net photosynthetic rate of different light treatments was different. 20% and 30% light intensities significantly improved the net photosynthetic rate and transpiration rate of C. hirsuta, while the vapor pressure deficit decreased (P<0.05). These results showed the photosynthetic function was promoted. The content of photosynthetic pigments of C. hirsuta leaves were the highest in the 30% light treatment. Furthermore, the total chlorophyll content was the highest, but the chlorophyll a/b was the lowest, which was beneficial to the synthesis of chlorophyll b of C. hirsuta leaves under the 30% light treatment. There were more developed palisade tissue, spongy tissue and thicker blade thickness in C. hirsuta leaves under 20% and 30% light treatments, which promoted its adaptation to the environment and enhanced the photosynthesis. Under the appropriate shade conditions (20%-40% light treatments), the maximum net photosynthetic rate of C. hirsuta increased.Conclusion] Under 20% and 30% light treatments, the blade has more developed palisade tissue and thicker leaf thickness, and the stoma density is relatively low. The net photosynthetic and transpiration rate of C. hirsuta leaves are improved. On the contrary, the internal carbon dioxide concentration and vapor pressure deficit of C. hirsute are decreased, which leads to the smaller resistance of CO2 and water vapor in and out of the stomata. At the same time, under 30% light treatment, the total chlorophyll content is the highest. It shows that the photosynthetic rate is improved effectively. It is concluded that C. hirsuta is suitable for growing in the environment with 20%-30% light intensity. |
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| Keywords: | Camellia hirsuta Hakoda et Ninh light treatment photosynthesis characteristics leave anatomical structure |
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