期刊论文

Effects of water stress on photosynthetic physiological characteristics of Machilus pauhoi seedlings

中文

中南林业科技大学学报

1673-923X

2016

36

9

29-35,43

10.14067/j.cnki.1673-923x.2016.09.006

国家林业公益性行业科研专项“红壤丘陵区经济林生态经营关键技术研究”（201104052） 优良乡土树种刨花楠丰产栽培技术推广项目（[2012]XT07）

本校为第一机构

采用盆栽试验, 研究水分胁迫对刨花润楠幼苗光合生理指标及叶绿素荧光参数的影响, 揭示水分胁迫对刨花润楠光合作用及生理指标之间的关系,为刨花润楠苗期水肥管理及栽培提供参考依据。结果表明:在4种水分胁迫下,刨花润楠幼苗的净光合速率、蒸腾速率及气孔导度的日变化均呈双峰曲线, 有明显的光合午休现象,轻度干旱(LS)对刨花润楠幼苗的净光合速率(P_n)、初始荧光(F_o)、非光化学猝灭系数(NPQ)无明显影响(P > 0.05);中度干旱(MS)及重度干旱(SS)均使刨花润楠幼苗叶片叶绿素含量、净光合速率(P_n)、蒸腾速率(T_r)、气孔导度(G_s)、胞间CO_2浓度(C_i)、电子传递速率(ETR)、最大光化学效率(F_v/F_m)、...

In order to provide theoretical basis for different water and fertilizer managements and water resistance cultivation, a pot experiment was conducted to study the physiological and biochemical responses and chlorophyll fl uorescence parameters to reveal the effect of drought stress on photosynthesis and associated physiological characters of Machilus pauhoi seedlings. The results showed that there was an apparent photosynthetic lunch break phenomenon and the net photosynthetic rate(P_n), transpiration rate(T_r), stomatal conductance(G_s) in the...