油茶无性系新梢生长期光合特性的研究
Study on Photosynthetic Characteristics in Shoot-growing Stage of Camellia oleifera Clones
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摘要: 以油茶无性系高产品种、中产品种和普通品种为试材,采用LI-6400P便携式光合测定系统在新梢生长期对其净光合速率、蒸腾速率等日变化规律及光合-光响应曲线进行了比较研究。结果表明:3个品种净光合速率日变化曲线存在单峰和双峰两种类型,高产品种与中产品种为单峰型,普通品种为双峰型,普通品种存在明显的光合午休现象,3个品种的净光合速率存在显著差异;3个品种上、下部叶片的蒸腾速率的日变化曲线均为单峰型,水分利用效率的日变化曲线均为"U"型;3个品种的最大净光合速率在8.404 - 10.879 μmol·m-2·s-1之间,光饱和点在305 - 318 μmol·m-2·s-1之间,光补偿点在24 - 53 μmol·m-2·s-1之间;逐步回归分析表明,影响高产品种叶片净光合速率的主导因子为气孔导度、胞间CO2浓度和相对湿度;气孔导度是影响中产品种净光合速率的主导因子,普通品种净光合速率主要受气孔导度和胞间CO2浓度的影响。Abstract: Taking Camellia oleifera clones, including high-yield varieties,moderate-yield varieties and common varieties, as materials and using the Li-6400 portable photosynthesis system, the diurnal dynamics of net photosythetic rate (Pn), transpiration rate, and light response curves of net photosynthetic rate (Pn) in the shoot-growing stage of Camellia oleifera were compared and studied.The results showed that:(1) The diurnal variation of net photosynthetic rate (Pn) presented a single peak curve and a double peak curve, the single peak curve existed in the high-yield and moderate-yield varieties, while the double peak curve existed in the common varieties,and the common varieties appeared an obvious midday depression.There were significantly differences of Pn among the three types of varieties,which provided references for high photosynthetic efficiency breeding of Camellia oleifera.(2)The diurnal variation curve of transpiration rate presented a single peak curve and the diurnal variation curve of WUE presented a U-shaped pattern.(3)The maximum net photosynthetic rate(Pnmax) was 8.404-10.879 μmol CO2·m-2·s-1 , light saturation point varied from 305 to 318 μmol·m-2·s-1 and light compensation point varied from 24 to 53 μmol·m-2·s-1. (4) Stomatal conductance(Cond), intercellular CO2 concentration(Ci) and air relative humidity were the dominant factors influencing the Pn of high-yield varieties. However, the dominant factors were stomatal conductance(Cond) for moderate-yield varieties, and Cond and Ci for common varieties.
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Key words:
- Camellia oleifera
- / yield
- / clones
- / photosynthetic characteristic
- / shoot-growing stage
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[1] 庄瑞林.中国油茶[M].北京:中国林业出版社,1988 [2] 陈永忠,杨小胡,彭邵锋,等.我国油茶良种选育研究现状及发展策略[J].林业科技开发,2005,19(4):1-4 [3] 陈永忠,王德斌,彭邵锋,等.油茶"XL"系列优良无性系和优良家系的选育[J].林业科技开发,2004,18(5):17-20 [4] 陈永忠,王德斌,彭邵锋,等.油茶优良杂交组合选育研究[J].中南林业科技大学学报,2008,28(4):81-89 [5] 陈永忠,彭邵锋,王湘南,等.油茶高产栽培系列技术研究——配方施肥试验[J].林业科学研究,2007,20(5):650-655 [6] 陈永忠,王湘南,彭邵锋,等.植物生长调节剂对油茶果实含油率的影响[J].中南林业科技大学学报,2007,27(1):25-29 [7] 王湘南,陈永忠,彭邵锋,等.5个油茶良种[J].林业科学,2008,44(4):173-174 [8] 陈永忠,肖志红,彭邵锋,等.油茶果实生长特性和油脂含量变化的研究[J].林业科学研究,2006,19(1):9-14 [9] 奚如春,邓小梅,龚 春,等.高亚油酸含量油茶优良无性系的选育[J].林业科学研究,2006,19(1):158-164 [10] 庄瑞林,黄爱珠,董汝湘,等.油茶19个高产新品种的选育研究[J].林业科学研究,1992,5(11):619-627 [11] 何 方,何 柏.油茶栽培分布与立地分类的研究[J].林业科学,2002,32(5):64-72 [12] 唐光旭,唐仕斌,李 勇.油茶林地土壤的研究[J].江西林业科技,2002(1):20-24 [13] 李克瑞.山茶属27种植物油脂理化性质及脂肪酸组成的研究[J].中南林学院学报,1984,4(2):101-108 [14] 李六林,季 兰.杂种榛子不同方位叶片光合作用的日变化[J].林业科学,2006,42(12):47-53 [15] 刘宇锋,萧浪涛,童建华,等.非直线双曲线模型在光合光响应曲线数据分析中的应用[J].农业基础科学,2005,21(8):76-79 [16] 潘瑞炽,董愚得.植物生理学[M].北京:高等教育出版社,1998:106-112 [17] 黄义松,牛德奎,赵中华,等. 3个油茶优良无性系光合作用及生理特性研究[J].江西农业大学学报,2007,29(2):51-53 [18] 张国良,安连荣,代焕琴,等.柿幼树光合特性的研究[J].河北农业大学学报,2000,23(3):51-53 [19] 李国泰.8种园林树种光合作用特征与水分利用效率比较[J].林业科学研究,2002,15(3):291-296 [20] 胡新生,王世绩.树木水分胁迫生理与耐旱性研究进展及展望[J].林业科学,1998,34(2):77-89 [21] 姜卫兵,俞开锦,高光林,等.梨不同砧穗组合光合特性[J].园艺学报,2002,29(6):569-570 [22] 赵宗方,凌裕平,吴建华,等.梨树的光合特性[J].果树科学,1993,10(3):154-156 -
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