Paper · 2023 · Rice Science

Causal Analysis Between Rice Growth and Cadmium Accumulation and Transfer under Arbuscular Mycorrhizal Inoculation

Zhao Ting; Wang Li; Yang Jixian; et al.

8
claims
10
verbatim quotes
9
citations
2
research areas
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Open access · cc-by-nc-nd

Abstract

Cadmium (Cd) contamination in rice has been a serious threat to human health. To investigate the effects of arbuscular mycorrhizal fungi (AMF) on the Cd translocation in rice, a controlled pot experiment was conducted. The results indicated that AMF significantly increased rice biomass, with an increase of up to 40.0%, particularly in root biomass by up to 68.4%. Notably, the number of prominent rice individuals also increased, and their plasticity was enhanced following AMF inoculation. AMF led to an increase in the net photosynthetic rate and antioxidant enzyme activity of rice. In the AMF treatment group, the Cd concentration in the rice roots was significantly higher (19.1%‒68.0%) compared with that in the control group. Conversely, the Cd concentration in the rice seeds was lower in the AMF treatment group, indicating that AMF facilitated the sequestration of Cd in rice roots and reduced Cd accumulation in the seeds. Path coefficients varied across different treatments, suggesting that AMF inoculation reduced the direct impact of soil Cd concentration on the total Cd accumulation in seeds. The translocation of Cd was consistently associated with simultaneous growth dilution and compensatory accumulation as a result of mycorrhizal effects. Our study quantitatively analyzed this process through path analysis and clarified the causal relationship between rice growth and Cd transfer under the influence of AMF.

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Claims 8

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

AMF inoculation significantly increased rice biomass by up to 40.0%.

Treatment
AMFe1
Interactor
AMFe1symbiont
Outcome
rice biomasse1
Direction
increasede1
Value
40.0%e1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“AMF significantly increased rice biomass, with an increase of up to 40.0%”

✓ located verbatim in the source · abstract, characters 246–319 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

AMF inoculation increased rice root biomass by up to 68.4%.

Treatment
AMFe1
Interactor
AMFe1symbiont
Outcome
root biomasse1
Direction
increasede1
Value
68.4%e1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“AMF significantly increased rice biomass, with an increase of up to 40.0%, particularly in root biomass by up to 68.4%”

✓ located verbatim in the source · abstract, characters 246–364 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

AMF inoculation increased the number of prominent rice individuals and enhanced their plasticity.

Treatment
AMF inoculatione1
Interactor
AMFe1symbiont
Outcome
number of prominent rice individualse1
Direction
increasede1
Qualifier
their plasticity was enhancede1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Notably, the number of prominent rice individuals also increased, and their plasticity was enhanced following AMF inoculation”

✓ located verbatim in the source · abstract, characters 366–491 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

AMF increased the net photosynthetic rate and antioxidant enzyme activity of rice.

Treatment
AMFe1
Interactor
AMFe1symbiont
Outcome
net photosynthetic rate and antioxidant enzyme activitye1
Direction
increasee1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“AMF led to an increase in the net photosynthetic rate and antioxidant enzyme activity of rice”

✓ located verbatim in the source · abstract, characters 493–586 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

In the AMF treatment group, Cd concentration in rice roots was significantly higher (19.1%‒68.0%) than in the control group.

Organ / stage
rootse1
Treatment
AMFe1
Interactor
AMFe1symbiont
Outcome
Cd concentration in the rice rootse1
Direction
highere1
Value
19.1%‒68.0%e1
Comparator
control groupe1

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“In the AMF treatment group, the Cd concentration in the rice roots was significantly higher (19.1%‒68.0%) compared with that in the control group”

✓ located verbatim in the source · abstract, characters 588–733 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

AMF treatment lowered Cd concentration in rice seeds.

Organ / stage
seedse1
Treatment
AMFe1
Interactor
AMFe1symbiont
Outcome
Cd concentration in the rice seedse1
Direction
lowere1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“the Cd concentration in the rice seeds was lower in the AMF treatment group”

✓ located verbatim in the source · abstract, characters 747–822 · show in text ↑
Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

AMF inoculation appears to reduce the direct effect of soil Cd concentration on total Cd accumulation in seeds (path analysis).

Treatment
AMF inoculatione1
Interactor
AMFe1symbiont
Outcome
direct impact of soil Cd concentration on the total Cd accumulation in seedse1
Direction
reducede1

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice Growth”

✓ located verbatim in the source · title, characters 24–35 · show in text ↑
e1

“Path coefficients varied across different treatments, suggesting that AMF inoculation reduced the direct impact of soil Cd concentration on the total Cd accumulation in seeds”

✓ located verbatim in the source · abstract, characters 936–1110 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Cd translocation was consistently associated with simultaneous growth dilution and compensatory accumulation, attributed to mycorrhizal effects.

Outcome
translocation of Cde1
Qualifier
simultaneous growth dilution and compensatory accumulatione1

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice Growth”

✓ located verbatim in the source · title, characters 24–35 · show in text ↑
e1

“The translocation of Cd was consistently associated with simultaneous growth dilution and compensatory accumulation as a result of mycorrhizal effects”

✓ located verbatim in the source · abstract, characters 1112–1262 · show in text ↑

mycorrhiza · nutrient: content · Oryza sativa (rice)Results differ

44 papers: 42 positive, 2 negative or no effect

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

  1. positive
  2. no effect
  3. negative

40 papers more in this group

See all 44 papers →

inoculation · organism · Oryza sativa (rice)Positive and negative results

16 papers: 14 positive, 2 negative or no effect

13 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. no effect
  3. positive

12 papers more in this group

See all 16 papers →

mycorrhiza · growth · Oryza sativa (rice)Positive and negative results

41 papers: 37 positive, 4 negative or no effect

36 papers in the same direction as this paper · 4 in the opposite direction

  1. positive
  2. negative
  3. negative

37 papers more in this group

See all 41 papers →

inoculation · nutrient: content · Oryza sativa (rice)Positive and negative results

167 papers: 160 positive, 7 negative or no effect

159 papers in the same direction as this paper · 7 in the opposite direction

  1. no effect
  2. negative
  3. no effect

163 papers more in this group

See all 167 papers →

mycorrhiza · soil: biology · Oryza sativa (rice)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

mycorrhiza · organism · Oryza sativa (rice)Results agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 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.