Effects of Different Illumination Intensity on Photosynthetic Properties of Rhododendron simiarum at Low Altitude
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摘要: 利用LI-6400 便携式光合作用仪对10%光照和全光照下低海拔生长的猴头杜鹃Rhododendron simiarum 的光 合特性进行测定。光响应曲线分析结果显示,净光合速率表现为10%光照>全光照,夏季在低海拔环境下猴头杜 鹃适应遮荫的环境;10%光照下生长的猴头杜鹃蒸腾速率明显低于全光照下生长的猴头杜鹃,水分利用效率明显 高于全光照下生长的猴头杜鹃;10%光照下生长的猴头杜鹃有利于干物质的积累;2 种光照强度下的猴头杜鹃净光合 速率、蒸腾速率、气孔导度日变化均表现为“单峰”型;气孔限制值与胞间CO2 浓度的日变化表现为“双峰”型。Abstract: In March of 2015, 10 young Rhododendron simiarum trees were transplanted as potted culture from Songyang(altitude: 1 000 m) of Zhejiang province to Zhejiang Academy of Forestry (altitude: 24 m). In May of 2016, treatments of 10% of illumination and full exposure were carried out on 5 trees each. In July of 2016, determinations were implemented on their photosynthetic properties by LI-6400. The results showed that net photosynthetic rate(Pn) of R. simiarum trees under 10% illumination was higher than that under full exposure, indicating more adaptive to low light intensity at low altitude in the summer. Transpiration rate(Tr) of trees under 10% illumination was lower than that under full exposure, but water use efficency(WUE) was the opposite. R. simiarum under 10% light had more accumulation of dry matter. The diurnal variation of Pn, Tr and Gs was single-peak curve, but Ls and Ci had double-peak curve.
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Keywords:
- Rhododendron simiarum /
- shade /
- photosynthesis /
- illumination
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[1] 叶居新. 中国的猴头杜鹃矮林[J]. 武汉植物学研究,1994,12(2):170-174. [2] 何东进,何小娟,洪伟,等. 天宝岩猴头杜鹃林粗死木质残体数量特征[J].福建林学院学报,2008,28(4):293-298. [3] 郑国生,何秀丽. 夏季遮荫改善大田牡丹叶片光合功能的研究[J]. 林业科学,2006,42(4):27-32. [4] 潘远智,江明艳. 遮荫对盆栽一品红光合特性及生长的影响[J]. 园艺学报,2006,33(1):95-100. [5] 赵世伟,刘东焕,张佐双,等. 夏季温室遮荫对榕树和三雄蕊槟榔光合作用的影响[J]. 林业科学,2004,40(6):50-55. [6] 刘涛,杨生超,李玛,等. 不同遮荫处理对南重楼光合参数的影响[J]. 分子植物育种,2015,13(6):1383-1387. [7] 宋洋,廖亮,刘涛,等. 不同遮荫水平下香榧苗期光合作用及氮分配的响应机制[J]. 林业科学,2016,52(5):55-63. [8] 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]. 中国农学通报,2005,21(8):76-79. [9] 刘广林,刘瑛,王策. 不同遮荫处理对几种扶芳藤光合特性影响的研究[J]. 北方园艺,2010(19):78-81. [10] 滕建国,高长启,玉梅,等. 加拿大黄桦幼苗光合特性的研究[J]. 吉林林业科技,2006,35(2):527. [11] 吕洪飞,皮二旭,王岚岚,等. 遮荫处理的白英光合作用和叶绿素荧光特性研究[J]. 浙江师范大学学报:自然科学版,2009,32(1):1-6. [12] 蔡建国,任君霞,姜朝阳,等. 芒属5 种观赏草的耐荫性研究[J]. 福建林学院学报,2012,32(3):246-251. [13] 喇燕菲,张启翔,潘会堂,等. 弱光条件下东方百合的生长发育及光合特性研究[J]. 北京林业大学学报,2010,32(4):213-217. [14] 郑凌峰. 天然猴头杜鹃生长特性研究[J]. 江西农业大学学报,2000,22(3):425-427. [15] 叶功富,高伟,王亨,等. 木麻黄光合生理特性对海岸线距离梯度的响应[J]. 福建林学院学报,2013,33(4):291-297. [16] 姜霞,张喜,谢涛. 檫木苗期光合特性及水分利用效率研究[J]. 贵州林业科技,2016,44(3):19-23,30.
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