酸雨胁迫对秃瓣杜英幼苗叶片叶绿素荧光特性和生长的影响

采用盆栽试验和模拟酸雨喷淋的试验方法，研究了重度酸雨(pH 2.5)、中度酸雨(pH 4.0)和对照(pH 5.6)处理下,不同季节秃瓣杜英幼苗叶片的叶绿素荧光特性及其生长差异.结果表明：不同季节相同处理下，秃瓣杜英幼苗叶片的相对叶绿素含量(SPAD)、PSⅡ的最大光化学效率(F_v/F_m)、PSⅡ实际光化学量子产量(Φ_PSⅡ)、株高和地径均为10月＞7月＞4月＞1月；同一季节不同处理中，SPAD、F_v/F_m、Φ_PSⅡ、株高和地径为重度酸雨＞中度酸雨＞对照；不同pH酸雨梯度处理和季节的交互作用对秃瓣杜英的SPAD、F_v/F_m、株高和地径的影响显著，而对Φ_PSⅡ、光化学淬灭系数和非光化学淬灭系数的影响不显著.

Effects of acid rain stress on Eleocarpus glabripetalus seedlings leaf chlorophyll fluorescence characteristics and growth

A pot experiment was conducted to study the Eleocarpus glabripetalus seedlings leaf chlorophyll fluorescence characteristics and growth in different seasons under simulated acid rain stress (heavy, pH=2.5; moderate, pH=4.0; and control, pH=5.6). In the same treatments, the leaf relative chlorophyll content(SPAD), maximum PSⅡ photochemical efficiency (F_v/F_m), actual PSⅡ photochemical quantum yield (Φ_PSⅡ), plant height, and stem diameter in different seasons were all in the order of October>July>April>January. In the same seasons, all the parameters were in the order of heavy acid rain>moderate acid rain>control. The interactions between different acid rain stress and seasons showed significant effects on the SPAD, F_v/F_m, plant height, and stem diameter, but lesser effects on Φ_PSⅡ， q_P and q_N.