文献类型：期刊文献

英文题名：Significance of Photosynthetic Characters in the Evolution of Asian Gnetum (Gnetales)

作者：Deng, Nan[1,2,3] Hou, Chen[4,5] Liu, Caixia[2] Li, Minghe[6] Bartish, Igor[7] Tian, Yuxin[2,3] Chen, Wei[1] Du, Changjian[1] Jiang, Zeping[1,8] Shi, Shengqing[1]

第一作者：Deng, Nan

通信作者：Jiang, ZP[1];Shi, SQ[1];Jiang, ZP[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing, Peoples R China;[2]Hunan Acad Forestry, Changsha, Hunan, Peoples R China;[3]Hunan Cili Forest Ecosyst State Res Stn, Cili, Peoples R China;[4]Sun Yat Sen Univ, Sch Life Sci, Guangzhou, Guangdong, Peoples R China;[5]Stockholm Univ, Dept Ecol Environm & Plant Sci, Stockholm, Sweden;[6]Fujian Agr & Forestry Univ, Coll Landscape Architecture, Fuzhou, Fujian, Peoples R China;[7]Acad Sci Czech Republ, Inst Bot, Dept Genet Ecol, Prague, Czech Republic;[8]Chinese Acad Forestry, Inst Forest & Ecol Protect, Beijing, Peoples R China

年份：2019

卷号：10

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000457757300001)】；

基金：This work was supported by the Research Fund of Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration (ZDRIF201707), the Special Fund for State Key Laboratory of Tree Genetics and Breeding (TGB2013012), the Fund of National Non-profit Research Institutions of CAF (RIF2013-12) and the Special Fund for Hunan Forestry Science and Technology (XLK201812).

语种：英文

外文关键词：photosynthesis; chloroplast genomes; phylogeny; seed plants evolution; gymnosperms

摘要：Gnetum is a genus in the Gnetales that has a unique but ambiguous placement within seed plant phylogeny. Previous studies have shown that Gnetum has lower values of photosynthetic characters than those of other seed plants, but few Gnetum species have been studied, and those that have been studied are restricted to narrow taxonomic and geographic ranges. In addition, the mechanism underlying the lower values of photosynthetic characters in Gnetum remains poorly understood. Here, we investigated the photosynthetic characters of a Chinese lianoid species, i.e., Gnetum parvifolium, and co-occurring woody angiosperms growing in the wild, as well as seedlings of five Chinese Gnetum species cultivated in a greenhouse. The five Gnetum species had considerably lower values for photosynthesis parameters (net photosynthetic rate, transpiration rate, intercellular CO2 concentration, and stomatal conductance) than those of other seed plant representatives. Interrelated analyses revealed that the low photosynthetic capacity may be an intrinsic property of Gnetum, and may be associated with its evolutionary history. Comparison of the chloroplast genomes (cpDNAs) of Gnetum with those of other seed plant representatives revealed that 17 coding genes are absent from the cpDNAs of all species of Gnetum. This lack of multiple functional genes from the cpDNAs probably leads to the low photosynthetic rates of Gnetum. Our results provide a new perspective on the evolutionary history of the Gnetales, and on the ecophysiological and genomic attributes of tropical biomes in general. These results could also be useful for the breeding and cultivation of Gnetum.