油茶幼苗对毛竹化感物质的光合生理响应  

Photosynthetic Physiological Responses to Allelochemicals of Phyllostachys edulis in Seedlings of Camelia oleifera Abel

作　　者：陈娟[1] 白尚斌[1] 周国模[1] 王懿祥[1] 王楠[1] 梁倩倩[1] 沈蕊[1] 

机构地区：[1]浙江农林大学,临安311300

出　　处：《东北林业大学学报》2013年第11期13-17,共5页Journal of Northeast Forestry University

基　　金：国家自然科学基金资助项目(31170594);浙江省大学生科技创新(新苗人才)项目(2012R41204;浙江农林大学科研发展基金项目(2009FR060)

摘　　要：为探讨毛竹(Phyllostachys edulis)化感物质如何影响油茶幼苗的光合生理,采用水浸提的方法,用毛竹茎叶、枯落物和根际土壤3种不同的浸提液处理油茶幼苗,以蒸馏水处理作为对照,测定不同质量浓度梯度浸提液处理下油茶幼苗的光合生理特性参数和叶绿素质量分数。结果表明:高质量浓度的毛竹浸提液显著抑制油茶幼苗叶绿素质量分数,低质量浓度则促进,其中0.02 g·mL-1的枯落物浸提液与对照相比增量为7.68%,促进作用达到了极显著水平。毛竹化感物质对油茶净光合速率、气孔导度的影响大体上表现为高质量浓度抑制、低质量浓度促进的效应。油茶幼苗光合生理参数对毛竹化感物质的响应不尽相同,高质量浓度的3种浸提液显著降低了油茶的最大净光合速率,与对照相比分别降低了27.42%、26.97%和21.25%,且抑制作用随着化感物质质量浓度的降低而逐渐减弱,直至转化为促进作用。毛竹化感物质提高了油茶的暗呼吸速率和光补偿点,而对表观量子效率无明显作用。The experiment was conducted to study the allelopathic effects of allelochemicals＇ of Phyllostachys edulis on photosyn- thetic physiological of Camelia oleifera Abel.. With three types of aqueous extracts （stem and leaf, litter, soil）, three concentration gradients （0.10, 0.05 and 0.02 g·mL-1 ） were used as different treatments, and the distilled water as the control. The chlorophyll mass fraction showed significant inhibitory effect under higher mass concentration of aqueous ex- tracts, and stimulatory effect under lower content. 0.02 g ·mL^-1 litter extracts showed significant stimulatory effect on chlorophyll mass fraction and the stimulation rate reached 7.68%. Net photosynthesis rate and stomatal conductance were also inhibited at higher content and enhanced at lower content. Allelochemicals of P. edulis had different effects on photo- synthetic parameters, under the effects of higher content of aqueous extracts, the maximum net photosynthesis of C. oleif- era Abel. reduced by 27.42%, 26.97% and 21.25% , respectively, and the inhibitory effect weakened with the content gradients of aqueous extracts reducing. Allelochemicals of P. edulis treatment led to the increase of light compensation point and dark respiration rate, but had no significant effect on the apparent quantum yield.

关 键 词：毛竹 化感物质 光合生理 油茶 

分 类 号：S795[农业科学—林木遗传育种] Q945.11[农业科学—林学]