文献类型：期刊文献

英文题名：Picea pungens exhibits greatest tolerance to short-time thermal stress compared to Picea abies, and Picea omorika

作者：Ouyang, Fangqun[1] Sun, Meng[1] Cui, Xia[1] Tigabu, Mulualem[3] Zhang, Hui[1] Deng, Junyu[1] Wang, Junhui[2] Wei, Yu[1] He, Ran[1]

第一作者：Ouyang, Fangqun

通信作者：Wei, Y[1];He, R[1]

机构：[1]Beijing Floriculture Engn Technol Res Ctr, China Natl Bot Garden North Garden, Beijing Lab Urban & Rural Ecol Environm, Key Lab Natl Forestry & Grassland Adm Plant Ex Sit, Beijing 100093, Peoples R China;[2]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, State Forestry Adm,Res Inst Forestry, Beijing 100, Peoples R China;[3]Fujian Agr & Forestry Univ, Coll Forestry, Fuzhou 350002, Peoples R China

年份：2023

外文期刊名：NEW FORESTS

收录：;EI(收录号：20235015210572);Scopus(收录号：2-s2.0-85179307129);WOS:【SCI-EXPANDED(收录号:WOS:001121713400001)】；

基金：We thank the Beijing Municipal Administration Center of Parks for funding the umbrella project "Spruce Species Introduction, High Temperature Resistance Evaluation and Efficient Breeding of New Excellent Germplasm" (ZX2021012) and National Forestry and Grassland Administration for funding the Forestry science and technology extension project: cultivation and breeding technology promotion demonstration of Picea pungens (Jing[2023]TG05). We also thank the Scientific Research Instrument Platform of the State Key Laboratory of Forest Genetics and Breeding. We appreciate the linguistic assistance provided by TopEdit (www.topeditsci.com) during the preparation of this manuscript.

语种：英文

外文关键词：Picea pungens; Picea abies; Picea omorika; Heat resistance; Needle water content; Fv/Fm; Maximal photochemical efficiency

摘要：Species in the genus Picea are well-suited for afforestation on high altitudes and latitudes, but are fairly intolerant to high temperatures. In this study, Picea pungens, Picea abies, and Picea omorika were subjected to 45 degrees C, 40 degrees C, 35 degrees C, and ambient temperature (CK) for 6 h, and then allowed to recover for 28 d. Changes in phenotype, relative water content (RWC), and maximal photochemical efficiency (Fv/Fm) of photosystem II (PS II) were observed to ascertain their thermal tolerance. Overall, all three species were negatively affected by exposure to 45 degrees C, but P. pungens exhibited full recovery, with the highest RWC, while P. omorika exhibited partial recovery, and P. abies showed minimal recovery. The PS II of all three species were damaged after 45 degrees C treatment, but that of P. pungens exhibited the most dramatic recovery, with Fv/Fm recovering from 0 to 0.26. In conclusion, P. pungens was found to exhibit the greatest thermal tolerance, followed by P. omorika and P. abies. Thus, thermal tolerance should be considered as a tool for species selection for future reforestation endeavor in the face of climate change that is expected to bring high summer temperature events.