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2016 ; 11
(10
): e1238548
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Wound signaling: The missing link in plant regeneration
#MMPMID27662421
Chen L
; Sun B
; Xu L
; Liu W
Plant Signal Behav
2016[Oct]; 11
(10
): e1238548
PMID27662421
show ga
Wounding is the first event that occurs in plant regeneration. However, wound
signaling in plant regeneration is barely understood. Using a simple system of de
novo root organogenesis from Arabidopsis thaliana leaf explants, we analyzed the
genes downstream of wound signaling. Leaf explants may produce at least two kinds
of wound signals to trigger short-term and long-term wound signaling. Short-term
wound signaling is primarily involved in controlling auxin behavior and the fate
transition of regeneration-competent cells, while long-term wound signaling
mainly modulates the cellular environment at the wound site and maintains the
auxin level in regeneration-competent cells. YUCCA (YUC) genes, which are
involved in auxin biogenesis, are targets of short-term wound signaling in
mesophyll cells and of long-term wound signaling in regeneration-competent cells.
The expression patterns of YUCs provide important information about the molecular
basis of wound signaling in plant regeneration.