兴安落叶松叶光合与氮代谢对环境变化响应的转录组分析

doi:10.13287/j.1001-9332.202203.008

摘要/Abstract

摘要： 为了揭示兴安落叶松针叶光合作用对环境变化响应的分子机制,采用高通量测序技术,对生长环境差异明显的4个样地[塔河(52°52′ N)、松岭(50°72′ N)、黑河(49°22′ N)和带岭(47°08′ N)]兴安落叶松针叶进行转录组测序,并比对不同样地树木针叶的差异表达基因(DEGs)。结果表明: 共获得高质量短读序282428811条,其中在塔河-松岭、塔河-黑河、塔河-带岭、松岭-黑河、松岭-带岭、黑河-带岭6个对比组中,分别筛选出16915、18812、28536、20635、29957和23617条差异表达基因。在KEGG代谢通路分析中,光合作用通路中编码光系统Ⅱ(PSⅡ)的Psb基因家族的9个基因(即PsbB、PsbK、PsbO、PsbP、PsbQ、PsbS、PsbW、Psb27和Psb28)及编码F型ATP酶的3个基因(即ATPF1A, atpA、ATPF1G, atpG和ATPF1D, atpH)均随样地间的环境差异增大而呈现明显上调;氮代谢通路中编码谷氨酰胺合成酶的基因(glnA, GLUL)、硝酸还原酶的基因(NR)、碳酸酐酶的基因(cynT,can)也呈现同样的上调。DEGs和上调基因的数量均随样地环境变化增大而增多,进而导致了兴安落叶松针叶光合能力在样地间的差异。

关键词: 气候变化, 光合作用, 响应机理, 生态型, 基因表达

Abstract: To reveal molecular mechanisms underlying photosynthesis responses of Dahurian larch (Larix gmelinii) to environmental changes, we used the high-throughput sequencing technology to sequence the transcriptome of larch leaves from four latitudinal sites with different environmental conditions, and compared differential expression genes (DEGs). The four sites from high- to low-latitude were Tahe (52°52′ N), Songling (50°72′ N), Heihe (49°22′ N), and Dailing (47°08′ N). A total of 282428811 clean reads were sequenced out, among which the abundace of DEGs were 16915, 18812, 28536, 20635, 29957 and 23617 for the Tahe-Songling, Tahe-Heihe, Tahe-Dailing, Songling-Heihe, Songling-Dailing, and Heihe-Dailing comparisons, respectively. The expression of nine Psb genes family (i.e., PsbB, PsbK, PsbO, PsbP, PsbQ, PsbS, PsbW, Psb27, and Psb28) encoding Photosystem Ⅱ and that of three genes (ATPF1A,atpA, ATPF1G, atpG, and ATPF1D, atpH) encoding F-type ATPase, which were involved in photosynthesis pathway, were significantly up-regulated with increasing environmental differences among the sites. A similar up-regulation pattern occurred for the expression of genes encoding glutamine synthetase (glnA, GLUL), nitrate reductase (NR), and carbonic anhydrase (cynT, can) that were involved in nitrogen metabolism pathway. The numbers of DEGs and up-regulated genes increased with the increases in environmental changes among the sites, resulting in inter-site divergence of photosynthetic capacity of larch trees.

Key words: climate change, photosynthesis, response mechanism, ecotype, gene expression

刘梅朔, 王传宽, 全先奎. 兴安落叶松叶光合与氮代谢对环境变化响应的转录组分析[J]. 应用生态学报, 2022, 33(4): 957-962.

LIU Mei-shuo, WANG Chuan-kuan, QUAN Xian-kui. Transcriptome analysis on responses of leaf photosynthesis and nitrogen metabolism of Larix gmelinii to environmental change[J]. Chinese Journal of Applied Ecology, 2022, 33(4): 957-962.

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