摘要
以马尾松Pinus massoniana为供试材料,采用土培盆栽的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)处理下不同季节马尾松叶片的叶绿素荧光特性。结果表明:经过2 a的酸雨喷施,马尾松幼苗叶片的Fv/Fm和Fv/Fo等荧光参数变化较为一致,均随着pH值的升高而降低,而且随着处理时间的延续实际光化学量子产量(yield)也呈现相同的趋势,说明马尾松在酸雨胁迫下,其叶片的PSⅡ原初光能的转换效率、激发能利用情况和电子传递效率都受到一定的影响,从而不利于其进行光合作用及生长,故在酸雨严重的地区,马尾松的生长不是很好,不适合大范围种植。
Using a portable PAM-2100 fluorometer,potted plants of Pinus massoniana were used to study chlorophyll fluorescence parameters in different seasons,with three levels of simulated acid rain stress （heavy stress,pH 2.5; moderate stress,pH 4.0; and control pH 5.6）.Results showed that maximum efficiency of photosystem Ⅱ in the dark （Fv/Fm） and potential photochemical efficiency（Fv/Fo）were decreased with increased pH values of acid rain after two years of acid rain spraying.And actual photochemical quantum （yield）also showed the same trend with time.Our results indicated that efficiency of primary conversion of light energy of PS Ⅱ,the efficiency of potential photosynthetic quantum conversion and the photosynthetic electron transport rate were negatively affected under acid rain stress,which was adverse to plant growth.Thus,P.massoniana is unsuitable for widespread planting in areas of heavy acid rain.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2013年第5期706-713,共8页
Journal of Zhejiang A&F University
基金
国家自然科学基金资助项目(31100325)
浙江省自然科学基金资助项目(Y3110200,Y5110226)
浙江省教育厅资助项目(Y201017730)
关键词
森林生态学
酸雨胁迫
马尾松
叶绿素荧光特性
季节
forest ecology
acid rain stress
Pinus massoniana
characteristics of chlorophyll fluorescence
seasonal changes
