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种子特异性基因 MOTHER of FT and TFL1（MFT）在龙眼胚胎发生、激素和应激反应中的作用

Seed-Specific Gene MOTHER of FT and TFL1（MFT） Involved in Embryogenesis, Hormones and Stress Responses in Dimocarpus longan Lour.

机构信息

Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Institut de la Recherche Interdisciplinaire de Toulouse, IRIT-ARI, 31300 Toulouse, France.

出版信息

Int J Mol Sci. 2018 Aug 14;19(8):2403. doi: 10.3390/ijms19082403.

DOI:10.3390/ijms19082403
PMID:30110985
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6122071/
Abstract

() belongs to phosphatidylethanolamine-binding protein (PEBP) family, which plays an important role in flowering time regulation, seed development, and germination. To gain insight into the molecular function of in Lour., we isolated and its promoter sequence from longan embryogenic callus (EC). Bioinformatic analysis indicated that the promoter contained multiphytohormones and light responsive regulatory elements. Subcellular localization showed that the given the DlMFT signal localized in the nucleus, expression profiling implied that showed significant upregulation during somatic embryogenesis (SE) and zygotic embryogenesis (ZE), and particular highly expressed in late or maturation stages. The accumulation of was mainly detected in mature fruit and seed, while it was undetected in abortive seeds, and notably decreased during seed germination. DlMFT responded differentially to exogenous hormones in longan EC. Auxins, salicylic acid (SA) and methyl jasmonate (MeJa) suppressed its expression, however, abscisic acid (ABA), brassinosteroids (BR) showed the opposite function. Meanwhile, DlMFT differentially responded to various abiotic stresses. Our study revealed that DlMFT might be a key regulator of longan somatic and zygotic embryo development, and in seed germination, it is involved in complex plant hormones and abiotic stress signaling pathways.

摘要

（）属于磷酸乙醇胺结合蛋白（PEBP）家族，在开花时间调控、种子发育和萌发中发挥重要作用。为了深入了解 在龙眼中的分子功能，我们从龙眼胚性愈伤组织（EC）中分离出 及其启动子序列。生物信息学分析表明，启动子包含多种植物激素和光响应调控元件。亚细胞定位显示，所赋予的 DlMFT 信号定位于细胞核，表达谱分析表明，在体细胞胚胎发生（SE）和合子胚胎发生（ZE）过程中， 显著上调，特别是在后期或成熟阶段高度表达。 的积累主要在成熟果实和种子中检测到，而在败育种子中未检测到，并且在种子萌发过程中显著降低。DlMFT 在龙眼 EC 中对外源激素表现出不同的反应。生长素、水杨酸（SA）和茉莉酸甲酯（MeJa）抑制其表达，而脱落酸（ABA）、油菜素内酯（BR）则表现出相反的功能。同时，DlMFT 对各种非生物胁迫的反应也不同。我们的研究表明，DlMFT 可能是龙眼体细胞和合子胚胎发育的关键调节剂，在种子萌发过程中，它参与了复杂的植物激素和非生物胁迫信号通路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/f0f615669ff0/ijms-19-02403-g010a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/627e9319dede/ijms-19-02403-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/64a5f0daac67/ijms-19-02403-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/07287f7acd1f/ijms-19-02403-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/56b78f701468/ijms-19-02403-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/f0f615669ff0/ijms-19-02403-g010a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/cf730712ef41/ijms-19-02403-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/64a5f0daac67/ijms-19-02403-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01bd/6122071/07287f7acd1f/ijms-19-02403-g008.jpg
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