Induced Mobile Florigenic Signals in Transgenic and Transgrafted Blueberries

Overview

Journal Hortic Res

Publisher Oxford University Press

Date 2019 Oct 25

PMID 31645960

Citations 15

Authors

Guo-Qing Song

Aaron Walworth

Tianyi Lin

Qiuxia Chen

Xiumei Han

L Irina Zaharia

Gan-Yuan Zhong

Affiliations

Soon will be listed here.

Abstract

() can promote early flowering in annual species, but such role has not been well demonstrated in woody species. We produced self and reciprocal grafts involving non-transgenic blueberry (NT) and transgenic blueberry (T) carrying a 35S-driven blueberry (-OX). We demonstrated that the transgenic -OX rootstock promoted flowering of non-transgenic blueberry scions in the NT (scion):T (rootstock) grafts. We further analyzed RNA-Seq profiles and six groups of phytohormones in both NT:T and NT:NT plants. We observed content changes of several hormone metabolites, in a descending order, in the transgenic NT:T, non-transgenic NT:T, and non-transgenic NT:NT leaves. By comparing differential expression transcripts (DETs) of these tissues in relative to their control, we found that the non-transgenic NT:T leaves had many DETs shared with the transgenic NT:T leaves, but very few with the transgenic NT:T roots. Interestingly, a number of these shared DETs belong to hormone pathway genes, concurring with the content changes of hormone metabolites in both transgenic and non-transgenic leaves of the NT:T plants. These results suggest that phytohormones induced by -OX in the transgenic leaves might serve as part of the signals that resulted in early flowering in both transgenic plants and the non-transgenic NT:T scions.

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