PMID- 34411764 OWN - NLM STAT- MEDLINE DCOM- 20211022 LR - 20211022 IS - 1876-7737 (Electronic) IS - 1874-3919 (Linking) VI - 248 DP - 2021 Sep 30 TI - Proteome analysis reveals a systematic response of cold-acclimated seedlings of an exotic mangrove plant Sonneratia apetala to chilling stress. PG - 104349 LID - S1874-3919(21)00248-7 [pii] LID - 10.1016/j.jprot.2021.104349 [doi] AB - Low temperature in winter was the most crucial abiotic stress that limits the mangrove afforestation northward. Previous study demonstrated that Sonneratia apetala initially transplanted to high latitude area exhibited a stronger plasticity of cold tolerance. To clarify the underlying mechanism, the physiological and proteomic responses to chilling stress were investigated in S. apetala leaves. Our results found that cold-acclimated seedlings had lower relative electrolyte leakage and MDA content than non-acclimated seedlings. On the contrary, higher chlorophyll content and photosynthetic capacity were observed in cold-acclimated seedlings. With proteomic analyses, the differentially accumulated proteins (DAPs) involved in ROS scavenging, photosynthesis and energy metabolism, carbohydrate metabolism, cofactor biosynthesis, and protein folding were suggested to play important roles in enhancing the cold tolerance of S. apetala. However, the down-regulation DAPs were suggested as a tradeoff between plant growth and chilling response. By the protein-protein interaction analyses, translation elongation factor G, chlorophyll A-B binding protein and ascorbate peroxidase 1 were suggested as the important regulators in cold-acclimated S. apetala seedlings under chilling stress. Based on the above results, a schematic diagram describing the mechanism of cold tolerance of exotic mangrove species S. apetala that was achieved by cold acclimation was presented in this study. SIGNIFICANCE: The major environmental factor limits the mangrove afforestation northward is the low temperature in winter. Previous study reported that Sonneratia apetala grew in high latitude exhibited a higher cold tolerance than that in low latitude, which was suggested as a result of cold acclimation. To further understand "how cold acclimation enhance the cold tolerance in S. apetala", the response of S. apetala subjected to chilling stress with or without cold acclimation was investigated in this study at the physiological and proteomic aspects. Our physiological results showed that S. apetala seedlings treated with cold acclimation exhibited a higher tolerance under chilling stress than that without cold acclimation. By using the comparative proteomic approaches and bioinformatic analyses, various biological processes were suggested to play an important role in enhancing the cold tolerance of S. apetala under chilling stress, such as ROS scavenging, photosynthesis and energy metabolism, carbohydrate metabolism, cofactor biosynthesis, and protein folding. Among these differentially accumulated proteins, translation elongation factor G (eEF-G), chlorophyll A-B binding protein (CAB) and ascorbate peroxidase 1 (APX1) were identified as the hub proteins function in coordinated regulating ROS scavenging, photosynthesis and protein biosynthesis in chloroplast and subsequently enhanced the cold tolerance of S. apetala under chilling stress. Our results provided a further understanding of cold acclimation in improving the cold tolerance in exotic mangrove species S. apetala. CI - Copyright (c) 2021 Elsevier B.V. All rights reserved. FAU - Shen, Zhi-Jun AU - Shen ZJ AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China. FAU - Qin, Ying-Ying AU - Qin YY AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, College of Environment and Resources, Guangxi Normal University, Guilin, Guangxi 541004, PR China. FAU - Luo, Mei-Rong AU - Luo MR AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China. FAU - Li, Zan AU - Li Z AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China. FAU - Ma, Dong-Na AU - Ma DN AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China. FAU - Wang, Wen-Hua AU - Wang WH AD - Fujian Key Laboratory of Subtropical Plant Physiology and Biochemistry, Fujian Institute of Subtropical Botany, Xiamen, Fujian 361006, PR China. FAU - Zheng, Hai-Lei AU - Zheng HL AD - Key Laboratory for Subtropical Wetland Ecosystem Research of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China. Electronic address: zhenghl@xmu.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210816 PL - Netherlands TA - J Proteomics JT - Journal of proteomics JID - 101475056 RN - 0 (Proteome) RN - YF5Q9EJC8Y (Chlorophyll A) SB - IM MH - Acclimatization MH - Chlorophyll A MH - Cold Temperature MH - *Proteome MH - Proteomics MH - *Seedlings OTO - NOTNLM OT - Chilling stress OT - Cold acclimation OT - Comparative proteomics OT - Exotic species OT - Mangrove plant OT - Sonneratia apetala EDAT- 2021/08/20 06:00 MHDA- 2023/02/25 06:00 CRDT- 2021/08/19 20:17 PHST- 2021/04/16 00:00 [received] PHST- 2021/07/27 00:00 [revised] PHST- 2021/08/06 00:00 [accepted] PHST- 2021/08/20 06:00 [pubmed] PHST- 2023/02/25 06:00 [medline] PHST- 2021/08/19 20:17 [entrez] AID - S1874-3919(21)00248-7 [pii] AID - 10.1016/j.jprot.2021.104349 [doi] PST - ppublish SO - J Proteomics. 2021 Sep 30;248:104349. doi: 10.1016/j.jprot.2021.104349. Epub 2021 Aug 16.