文献类型：期刊文献

中文题名：不同磷素供给闽楠苗木对自然低温的生理响应

英文题名：Physiological response of Phoebe bournei seedlings with different phosphorus supply levels to natural low temperature

作者：王东光[1] 杨锦昌[1] 李荣生[1] 邹文涛[1] 尹光天[1]

第一作者：王东光

机构：[1]中国林业科学研究院热带林业研究所

年份：2016

卷号：37

期号：2

起止页码：101-106

中文期刊名：华南农业大学学报

外文期刊名：Journal of South China Agricultural University

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家林业局林业公益性行业科研专项(201204307-03);国家科技支撑计划(2012BAD01B0403)

语种：中文

中文关键词：自然低温;闽楠;磷;生理响应;主成分分析

外文关键词：natural low temperature ; Phoebe bournei; phosphorus ; physiological response ; principal component analysis

分类号：S718

摘要：【目的】探明自然低温对不同磷素供给的闽楠Phoebe bournei苗木叶片生理特性的影响。【方法】设置8个磷素水平的单因素盆栽试验,施肥结束后,将苗木置于自然低温环境处理,测定其叶片的光合生理特性及其他生理指标,采用主成分分析法评价苗木抗寒性。【结果】在自然低温环境时,随磷素水平的升高,正负相关指标均表现出了明显的升降趋势。30 mg·株-1磷素供应量的闽楠苗木叶片净光合速率(Pn)、气孔导度(Gs)、胞间CO2浓度(Ci)、蒸腾速率(Tr)、光合水分利用效率(WUE)、脯氨酸含量和超氧化物歧化酶(SOD)活性均最高,其值分别为3.09μmol·m-2·s-1、0.023 mol·m-2·s-1、350.18μmol·mol-1、0.32 mmol·m-2·s-1、9.69、41.58μmol·g-1和332.03 U·g-1,丙二醛含量和气孔限制值(Ls)为第2低,其值分别为3.77μg·g-1和0.34。主成分综合分析结果显示,30 mg·株-1磷素供应量苗木得分最高。【结论】30 mg·株-1磷素供给最有利于闽楠苗木抗低温胁迫能力的提高。
[ Objective ] To determine the effects of different phosphorus supply levels on physiological ac- tivity of Phoebe bournei seedling leaf under natural low temperature. [ Method ] Single factor pot experi- ment was set up with eight phosphorus levels, and following fertilization the seedlings were left under nat- ural low temperature. Photosynthetic and other physiological indexes of the leaves were measured and an- alyzed. Cold resistance of the seedlings was assessed by principal component analysis. [ Result ] Under natural low temperature environment, all the positive and negative indexes indicated clear and gradual trend with the increase of phosphorus levels, net photosynthetic rate （ Pn）, stomatal conductance （ Gs）, in- tercellular CO2 concentration （ Ci ）, transpiration rate （ Tr）, water use efficiency （ WUE ）, proline content and SOD activity of P. bournei seedling leaf peaked at a phosphorus level of 30 mg phosphorus per seed- ling, and their values were 3.09 μmol·m^-2·s^-1 0.023 mol·m^-2·s^-1 350. 18·mol · mol^-1 O. 32 mmol ·m^-2·s^-1, 9. 69, 41.58 μmol·g^-1and 332.03 U · g^-1 ,respectively. At the same phos- phorus level, MDA content （3.77 μg · g^- 1 ） and stomatal limitation value （ Ls, 0. 34） were the second lowest. The highest cold resistance score was obtained at a phosphorus level of 30 mg per seedling based on principal component analysis. [ Conclusion ] The optimum phosphorus level is 30 mg per seedling for improving cold resistance of P. bournei seedlings.