南京林业大学学报（自然科学版）2016，Vol.40Issue(4)：49-55,7.DOI:10.3969/j.issn.1000-2006.2016.04.008
高频度模拟酸雨胁迫条件下菲白竹的光合响应
Response of photosynthetic characteristics of Pleioblastus fortunei to high frequent simulated acid rain
摘要
Abstract
In order to explore the photosynthetic response characteristic of bamboos to the high frequency of acid rain stress, the relative content of chlorophyll, the diurnal variation of photosynthesis and chlorophyll fluorescence in the leaves of Pleioblastus fortunei, an ornamental bamboo species were determined by foliar spraying with simulated acid rain (SAR) in different intensity of pH (2.0,3.0,4.0). The results showed that treating with different intensity of SAR could result in the decrease of the relative content of chlorophy. The lower was the pH value, was the greater the decrease. The acid rain stress led to diurnal variation changing from the control “single peak” to “bimodal”, which present obviously photosynthetic depression at midday. With the increase of stress intensity, net photosynthetic rate ( Pn ) , stomatal con⁃ductance ( Gs ) , transpiration rate ( Tr ) and stomatal limitation ( Ls ) decreased. while, the increasement of the intercel⁃lular CO2 concentration ( Ci ) indicated that the decline of photosynthetic rate was mainly caused by non⁃stomatal limiting factor under acid rain stress. In addition, the determination of fluorescence parameters showed that SAR of different in⁃tensity made PSⅡ photochemical efficiency ( Fv/Fm ) , the largest PSⅡ activity of potential ( Fv/Fo ) , PSⅡ photo⁃chemical efficiency ( Fv′/Fm′) , PSⅡ photochemical efficiency (ΦPSⅡ) , photochemical quenching ( qP ) significantly lower, but the non⁃photochemical quenching (NPQ) was significantly increased. After the recovery of a month, the fluo⁃rescence parameters of P.fortunei under pH 4.0 treatment could mostly recover;However, all of P.fortunei under pH 2.0 can�t recover. It shows that P. fortunei treated with SAR of pH 4.0 has a strong ability to repair itself, but with pH 2.0, it can�t recover through self⁃regulation. The enhancement of NPQ in P. fortunei might be a vital mechanism for the resis⁃tence to light under the acid stress.关键词
高频度模拟酸雨/菲白竹/光合日变化/叶绿素荧光Key words
high frequent acid rain/Pleioblastus fortunei/photosynthetic diurnal variation/chlorophyll fluorescence分类
农业科技引用本文复制引用
何亚飞,张珊珊,孙鑫,王涛,代丽,谢寅峰..高频度模拟酸雨胁迫条件下菲白竹的光合响应[J].南京林业大学学报（自然科学版）,2016,40(4):49-55,7.基金项目
“十二五”国家科技支撑计划（2015BAD04B02）；江苏高校优势学科建设工程资助项目 （）
