盐胁迫对夏橡幼苗光合生理特性的影响  

Effects of salt stress on photosynthetic physiological characteristics of Quercus robur

作　　者：陈跃萍 张志刚[2,5] 武胜利 姜恒[4] 张红霞 李斌 史开奇[3] 王兴胜 廖小龙[3] CHEN Yueping;ZHANG Zhigang;WU Shengli;JIANG Heng;ZHANG Hongxia;LI Bin;SHI Kaiqi;WANG Xingsheng;LIAO Xiaolong(College of Geography and Tourism,Xinjiang Normal University,Urumqi 830054,Xinjiang,China;Institute of Afforestation and Desertification Control,Xinjiang Academy of Forestry,Urumqi 830000,Xinjiang,China;Yili Prefecture Experimental Center for Breeding of Forest Varieties,Qapqar 835311,Xinjiang,China;College of Ecology and Environment,Xinjiang University,Key Laboratory of Oasis Ecology of the Ministry of Education,Urumqi 830046,Xinjiang,China;Key Laboratory of Xinjiang Forest Resources and Utilization,National Forestry and Grassland Administration,Urumqi 830000,Xinjiang,China)

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054 [2]新疆林业科学院造林治沙研究所,新疆乌鲁木齐830000 [3]伊犁州林木良种繁育试验中心,新疆察布查尔835311 [4]新疆大学生态与环境学院,绿洲生态教育部重点实验室,新疆乌鲁木齐830046 [5]新疆林木资源与利用国家林草局重点实验室,新疆乌鲁木齐830000

出　　处：《云南大学学报（自然科学版）》2024年第6期1173-1181,共9页Journal of Yunnan University(Natural Sciences Edition)

基　　金：伊犁州林木良种繁育中心国家杨树、白榆重点林木良种基地补助项目(202306).

摘　　要：以2年生夏橡幼苗为试验材料,采用盆栽方式模拟不同程度盐胁迫环境,设置对照CK、0.2%(T_(0.2))、0.4%(T_(0.4))、0.6%(T_(0.6))、0.7%(T_(0.7))、0.8%(T_(0.8))、0.9%(T_(0.9))和1%(T_(1))8个质量比处理梯度,研究不同程度盐胁迫对夏橡幼苗光合生理特性的影响.研究结果表明,在T_(0.2)处理下,盐胁迫对夏橡幼苗的生长和光合生理生态特征影响较小.随着盐质量比的增加,不同盐质量比处理下叶片的净光合速率(P_(n))和气孔导度(G_(s))较CK均有显著下降,且伴随着胞间CO_(2)浓度(C_(i))的上升,表明盐胁迫下夏橡幼苗叶片P_(n)下降的主要原因是受非气孔因素限制.在光响应过程中,低盐胁迫对净光合速率的影响较小,高盐胁迫对净光合速率的影响非常显著.夏橡幼苗耐盐阈值为0.36%NaCl,能够在弱盐渍化土中栽培种植.In this study,2-year-old Quercus robur saplings were used as experimental materials to investigate the effects of varying levels of salt stress on their photosynthetic physiological characteristics.Eight treatment gradients were established:CK(control),0.2%(T_(0.2)),0.4%(T_(0.4)),0.6%(T_(0.6)),0.7%(T_(0.7)),0.8%(T_(0.8)),0.9%(T_(0.9)),and 1%(T_(1)).The results showed that under the T_(0.2) treatment,salt stress had minimal impact on the growth and photosynthetic physiological and ecological characteristics of Quercus robur.As salt concentration increased,the net photosynthetic rate(P_(n))and stomatal conductance(G_(s))of the leaves decreased significantly compared to CK,while the intercellular CO_(2) concentration(C_(i))increased.This suggests that the reduction in P_(n) under salt stress is primarily due to non-stomatal factors.During the light response process,low levels of salt stress had a minor effect on the net photosynthetic rate,whereas high levels of salt stress had a significant impact.The salt tolerance threshold for Quercus robur was determined to be 0.36%NaCl,indicating that it can be cultivated and planted in mildly saline soils.

关 键 词：夏橡 盐胁迫 光合生理特征 光响应 

分 类 号：S792.11[农业科学—林木遗传育种]