Paper · 2024 · PeerJ

SlZIP11 mediates zinc accumulation and sugar storage in tomato fruits

Jiaqi Sun; Manning Wang; Xinsheng Zhang; et al.

9
claims
14
verbatim quotes
7
citations
2
research areas
✓
Open access · cc-by

Abstract

Background Zinc (Zn) is a vital micronutrient essential for plant growth and development. Transporter proteins of the ZRT/IRT-like protein (ZIP) family play crucial roles in maintaining Zn homeostasis. Although the acquisition, translocation, and intracellular transport of Zn are well understood in plant roots and leaves, the genes that regulate these pathways in fruits remain largely unexplored. In this study, we aimed to investigate the function of SlZIP11 in regulating tomato fruit development. Methods We used Solanum lycopersicum L. ‘Micro-Tom’ SlZIP11 ( Solanum lycopersicum ) is highly expressed in tomato fruit, particularly in mature green (MG) stages. For obtaining results, we employed reverse transcription-quantitative polymerase chain reaction (RT-qPCR), yeast two-hybrid assay, bimolecular fluorescent complementation, subcellular localization assay, virus-induced gene silencing (VIGS), SlZIP11 overexpression, determination of Zn content, sugar extraction and content determination, and statistical analysis. Results RT-qPCR analysis showed elevated SlZIP11 expression in MG tomato fruits. SlZIP11 expression was inhibited and induced by Zn deficiency and toxicity treatments, respectively. Silencing SlZIP11 via the VIGS technology resulted in a significant increase in the Zn content of tomato fruits. In contrast, overexpression of SlZIP11 led to reduced Zn content in MG fruits. Moreover, both silencing and overexpression of SlZIP11 caused alterations in the fructose and glucose contents of tomato fruits. Additionally, SlSWEEET7a interacted with SlZIP11. The heterodimerization between SlSWEET7a and SlZIP11 affected subcellular targeting, thereby increasing the amount of intracellularly localized oligomeric complexes. Overall, this study elucidates the role of SlZIP11 in mediating Zn accumulation and sugar transport during tomato fruit ripening. These findings underscore the significance of SlZIP11 in regulating Zn levels and sugar content, providing insights into its potential implications for plant physiology and agricultural practices.

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Claims 9

Observationobservedoriginal resultmeasured

Claim · model-written summary

SlZIP11 expression was elevated in mature green tomato fruit.

Organ / stage
MG tomato fruitse0
Gene
SlZIP11e0
Outcome
SlZIP11 expressione0
Direction
elevatede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“elevated SlZIP11 expression in MG tomato fruits”

✓ located verbatim in the source · abstract, characters 1063–1110 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Zinc deficiency inhibited SlZIP11 expression.

Treatment
Zn deficiencye0
Gene
SlZIP11e0
Outcome
SlZIP11 expressione0
Direction
inhibitede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“SlZIP11 expression was inhibited and induced by Zn deficiency and toxicity treatments, respectively”

✓ located verbatim in the source · abstract, characters 1112–1211 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 56–62 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Zinc toxicity induced SlZIP11 expression.

Treatment
toxicity treatmentse0
Gene
SlZIP11e0
Outcome
SlZIP11 expressione0
Direction
inducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“SlZIP11 expression was inhibited and induced by Zn deficiency and toxicity treatments, respectively”

✓ located verbatim in the source · abstract, characters 1112–1211 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 56–62 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

SlZIP11 silencing significantly increased tomato fruit zinc content.

Treatment
Silencing SlZIP11 via the VIGS technologye0
Gene
SlZIP11e0
Outcome
Zn content of tomato fruitse0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Silencing SlZIP11 via the VIGS technology resulted in a significant increase in the Zn content of tomato fruits”

✓ located verbatim in the source · abstract, characters 1213–1324 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

SlZIP11 overexpression reduced zinc content in mature green fruit.

Treatment
overexpression of SlZIP11e0
Gene
SlZIP11e0
Outcome
Zn content in MG fruitse0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“overexpression of SlZIP11 led to reduced Zn content in MG fruits”

✓ located verbatim in the source · abstract, characters 1339–1403 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 56–62 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

SlZIP11 silencing altered fructose and glucose content.

Treatment
silencinge0
Gene
SlZIP11e0
Outcome
fructose and glucose contents of tomato fruitse0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“both silencing and overexpression of SlZIP11 caused alterations in the fructose and glucose contents of tomato fruits”

✓ located verbatim in the source · abstract, characters 1415–1532 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

SlZIP11 overexpression altered fructose and glucose content.

Treatment
overexpression of SlZIP11e0
Gene
SlZIP11e0
Outcome
fructose and glucose contents of tomato fruitse0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“both silencing and overexpression of SlZIP11 caused alterations in the fructose and glucose contents of tomato fruits”

✓ located verbatim in the source · abstract, characters 1415–1532 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

SlSWEET7a interacted with SlZIP11.

Gene
SlZIP11e0
Outcome
SlSWEEET7a interacted with SlZIP11e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“SlSWEEET7a interacted with SlZIP11”

✓ located verbatim in the source · abstract, characters 1548–1582 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 56–62 · show in text ↑
Mechanismobservedoriginal resultmeasured

Claim · model-written summary

SlSWEET7a and SlZIP11 heterodimerization increased intracellular oligomeric complexes by changing subcellular targeting.

Gene
SlSWEET7a and SlZIP11e0
Outcome
intracellularly localized oligomeric complexese0
Direction
increasinge0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The heterodimerization between SlSWEET7a and SlZIP11 affected subcellular targeting, thereby increasing the amount of intracellularly localized oligomeric complexes”

✓ located verbatim in the source · abstract, characters 1584–1748 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 56–62 · show in text ↑

loss of function · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results

6 papers: 3 positive, 3 negative or no effect

2 papers in the same direction as this paper · 3 in the opposite direction

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  3. negative

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