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פותח על ידי קלירמאש פתרונות בע"מ -
Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation
Year:
2019
Source of publication :
Frontiers in Plant Science
Authors :
דורון-פייגנבאום, עדי
;
.
סינג, ויקראם
;
.
פירון, נורית
;
.
צמח, חניתה
;
.
שבתאי, שרה
;
.
Volume :
10
Co-Authors:

Lidiya Sergeeva, Wilco Ligterink, Roni Aloni, Jun Yang, Peng Zhang

Facilitators :
From page:
1
To page:
22
(
Total pages:
22
)
Abstract:

Sweetpotato yield depends on a change in the developmental fate of adventitious roots into storage-roots. The mechanisms underlying this developmental switch are still unclear. We examined the hypothesis claiming that regulation of root lignification determines storage-root formation. We show that application of the plant hormone gibberellin increased stem elongation and root gibberellin levels, while having inhibitory effects on root system parameters, decreasing lateral root number and length, and significantly reducing storage-root number and diameter. Furthermore, gibberellin enhanced root xylem development, caused increased lignin deposition, and, at the same time, decreased root starch accumulation. In accordance with these developmental effects, gibberellin application upregulated expression levels of sweetpotato orthologues of Arabidopsis vascular development regulators (IbNA075IbVND7, and IbSND2) and of lignin biosynthesis genes (IbPALIbC4HIb4CLIbCCoAOMT, and IbCAD), while downregulating starch biosynthesis genes (IbAGPase and IbGBSS) in the roots. Interestingly, gibberellin downregulated root expression levels of orthologues of the Arabidopsis BREVIPEDICELLUS transcription factor (IbKN2 and IbKN3), regulator of meristem maintenance. The results substantiate our hypothesis and mark gibberellin as an important player in regulation of sweetpotato root development, suggesting that increased fiber formation and lignification inhibit storage-root formation and yield. Taken together, our findings provide insight into the mechanisms underlying sweetpotato storage-root formation and provide a valuable database of genes for further research.

Note:
Related Files :
gene expression
gibberellins
Ipomoea batatas
lignin
plant anatomy
root
roots
Storage roots
Sweetpotato
xylem
yields / yielding
עוד תגיות
תוכן קשור
More details
DOI :
10.3389/fpls.2019.01320
Article number:
1320
Affiliations:
Database:
PubMed
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
45670
Last updated date:
02/03/2022 17:27
Creation date:
29/12/2019 15:28
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Scientific Publication
Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation
10

Lidiya Sergeeva, Wilco Ligterink, Roni Aloni, Jun Yang, Peng Zhang

Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation

Sweetpotato yield depends on a change in the developmental fate of adventitious roots into storage-roots. The mechanisms underlying this developmental switch are still unclear. We examined the hypothesis claiming that regulation of root lignification determines storage-root formation. We show that application of the plant hormone gibberellin increased stem elongation and root gibberellin levels, while having inhibitory effects on root system parameters, decreasing lateral root number and length, and significantly reducing storage-root number and diameter. Furthermore, gibberellin enhanced root xylem development, caused increased lignin deposition, and, at the same time, decreased root starch accumulation. In accordance with these developmental effects, gibberellin application upregulated expression levels of sweetpotato orthologues of Arabidopsis vascular development regulators (IbNA075IbVND7, and IbSND2) and of lignin biosynthesis genes (IbPALIbC4HIb4CLIbCCoAOMT, and IbCAD), while downregulating starch biosynthesis genes (IbAGPase and IbGBSS) in the roots. Interestingly, gibberellin downregulated root expression levels of orthologues of the Arabidopsis BREVIPEDICELLUS transcription factor (IbKN2 and IbKN3), regulator of meristem maintenance. The results substantiate our hypothesis and mark gibberellin as an important player in regulation of sweetpotato root development, suggesting that increased fiber formation and lignification inhibit storage-root formation and yield. Taken together, our findings provide insight into the mechanisms underlying sweetpotato storage-root formation and provide a valuable database of genes for further research.

Scientific Publication
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