Mobility of Antiflorigen and PEBP mRNAs in Tomato-Tobacco Heterografts

Plant Physiology
Nien-Chen HuangTien-Shin Yu

Abstract

Photoperiodic floral induction is controlled by the leaf-derived and antagonistic mobile signals florigen and antiflorigen. In response to photoperiodic variations, florigen and antiflorigen are produced in leaves and translocated through phloem to the apex, where they counteract floral initiation. Florigen and antiflorigen are encoded by a pair of homologs belonging to FLOWERING LOCUS T (FT)- or TERMINAL FLOWER1 (TFL1)-like clades in the phosphatidylethanolamine-binding domain protein (PEBP) family. The PEBP gene family contains FT-, TFL1-, and MOTHER OF FT AND TFL1 (MFT)-like clades. Evolutionary analysis suggests that FT- and TFL1-like clades arose from an ancient MFT-like clade. The protein movement of the PEBP family is an evolutionarily conserved mechanism in many plants; however, the mRNA movement of the PEBP family remains controversial. Here, we examined the mRNA movement of PEBP genes in different plant species. We identified a tobacco (Nicotiana sylvestris) CENTRORADIALIS-like1 gene, denoted NsCET1, and showed that NsCET1 is an ortholog of the Arabidopsis (Arabidopsis thaliana) antiflorigen ATC In tobacco, NsCET1 acts as a mobile molecule that non-cell-autonomously inhibits flowering. Grafting experiments showed that...Continue Reading

Citations

Sep 20, 2019·The New Phytologist·Allison Gaudinier, Benjamin K Blackman
Oct 28, 2019·Horticulture Research·Guo-Qing SongGan-Yuan Zhong
Jan 11, 2020·Frontiers in Plant Science·Yongping LiChunying Kang
Jun 14, 2020·Plants·Chao Xia, Cankui Zhang
Jun 9, 2020·Seminars in Cell & Developmental Biology·Suhyun JinJi Hoon Ahn
Mar 9, 2021·Journal of Experimental Botany·Kirtikumar R KondhareAnjan K Banerjee

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