Paper · 2025 · The Plant Journal

LbNAC55 improves the salt tolerance of Limonium bicolor by regulating the salt gland development

Mingjing Zhang; Aijuan Jiang; Ruitong Chen; et al.

8
claims
14
verbatim quotes
0
citations
3
research areas
—
Not open access

Abstract

The NAC transcription factors (TFs) are among the largest TF families in plants and play essential roles in growth, development, and stress responses. However, few studies have investigated how NAC TFs regulate salt gland development of recretohalophytes. In this study, we identified LbNAC55, a TF whose expression is upregulated by salt, from Limonium bicolor (a typical recretohalophyte which serves as a model for studying development and salt secretion of plant salt glands). Overexpression of LbNAC55 in L. bicolor significantly increases salt gland density and the salt tolerance of the species, whereas silencing LbNAC55 results in reduced salt gland development and diminished salt tolerance. Furthermore, yeast two-hybrid screening revealed that LbFLZ13 interacts with LbNAC55. Silencing LbFLZ13 similarly decreased salt gland formation and salt tolerance. Further studies showed that the reduction in salt gland density induced by the simultaneous silencing of both LbNAC55 and LbFLZ13 was significantly lower than that caused by the silencing of either gene alone. These results demonstrate that the regulatory modules of LbNAC55-LbFLZ13 control the expression of genes involved in salt gland development and secretion. These findings provide a new perspective on salt gland development in halophytes.

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Claims 8

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

LbNAC55 was identified as a salt-upregulated transcription factor in Limonium bicolor.

Taxon
Limonium bicolorLimonium bicolore0
Treatment
salte0
Gene
LbNAC55e0
Outcome
expressione0
Direction
upregulatede0

Not reportedComparator

Verbatim

e0

“we identified LbNAC55, a TF whose expression is upregulated by salt, from Limonium bicolor”

✓ located verbatim in the source · abstract, characters 271–361 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

LbNAC55 overexpression significantly increased salt gland density and salt tolerance in L. bicolor.

Taxon
L. bicolorLimonium bicolore0
Treatment
Overexpression of LbNAC55e0
Gene
LbNAC55e0
Outcome
salt gland density and the salt tolerancee0
Direction
increasese0

Not reportedComparator

Verbatim

e0

“Overexpression of LbNAC55 in L. bicolor significantly increases salt gland density and the salt tolerance of the species”

✓ located verbatim in the source · abstract, characters 481–601 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Silencing LbNAC55 reduced salt gland development and salt tolerance.

Taxon
Limonium bicolorLimonium bicolort0
Treatment
silencing LbNAC55e0
Outcome
salt gland developmente0
Direction
reducede0

Not reportedComparator

Verbatim

e0

“silencing LbNAC55 results in reduced salt gland development and diminished salt tolerance”

✓ located verbatim in the source · abstract, characters 611–700 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Silencing LbNAC55 diminished salt tolerance.

Taxon
Limonium bicolorLimonium bicolort0
Treatment
silencing LbNAC55e0
Outcome
salt tolerancee0
Direction
diminishede0

Not reportedComparator

Verbatim

e0

“silencing LbNAC55 results in reduced salt gland development and diminished salt tolerance”

✓ located verbatim in the source · abstract, characters 611–700 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Yeast two-hybrid screening revealed interaction between LbFLZ13 and LbNAC55.

Taxon
Limonium bicolorLimonium bicolort0
Gene
LbFLZ13e0
Outcome
interacts with LbNAC55e0

Not reportedDirection

Verbatim

e0

“yeast two-hybrid screening revealed that LbFLZ13 interacts with LbNAC55”

✓ located verbatim in the source · abstract, characters 715–786 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Silencing LbFLZ13 decreased salt gland formation and salt tolerance.

Taxon
Limonium bicolorLimonium bicolort0
Treatment
Silencing LbFLZ13e0
Outcome
salt gland formation and salt tolerancee0
Direction
decreasede0

Not reportedComparator

Verbatim

e0

“Silencing LbFLZ13 similarly decreased salt gland formation and salt tolerance”

✓ located verbatim in the source · abstract, characters 788–865 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Simultaneous silencing of LbNAC55 and LbFLZ13 caused a significantly smaller reduction in salt gland density than silencing either alone.

Taxon
Limonium bicolorLimonium bicolort0
Treatment
simultaneous silencing of both LbNAC55 and LbFLZ13e0
Outcome
reduction in salt gland densitye0
Direction
lowere0
Comparator
silencing of either gene alonee0

Verbatim

e0

“the reduction in salt gland density induced by the simultaneous silencing of both LbNAC55 and LbFLZ13 was significantly lower than that caused by the silencing of either gene alone”

✓ located verbatim in the source · abstract, characters 895–1075 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

LbNAC55-LbFLZ13 regulatory modules control expression of genes involved in salt gland development and secretion.

Taxon
Limonium bicolorLimonium bicolort0
Gene
LbNAC55-LbFLZ13e0
Outcome
expression of genes involved in salt gland development and secretione0

Verbatim

e0

“These results demonstrate that the regulatory modules of LbNAC55-LbFLZ13 control the expression of genes involved in salt gland development and secretion”

✓ located verbatim in the source · abstract, characters 1077–1230 · show in text ↑
t0

“Limonium bicolor”

✓ located verbatim in the source · title, characters 39–55 · show in text ↑

loss of function · growth · Limonium bicolorPositive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

loss of function · tolerance: abiotic · Limonium bicolorPositive and negative results

3 papers: 1 positive, 2 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
See all 3 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.