Abstract
This research was conducted to investigate the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions, at Nanjing Agricultural University, China. The nutrient solution contained 0.01 and 1.0 mM Mg concentration, with K at 1.0 and 6.0 mM. Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation. The shoot dry weight (DW) declined 12.9%, but root DW increased 12.1% leading to the significant increase in the root to shoot ratio at day 30. Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively. Correlation analysis revealed the root to shoot ratio is closely related to the soluble sugar contents in roots and root morphological parameters of rice at day 15 and day 30. The typical visible symptoms of Mg deficiency in leaves of rice were obtained in the treatment of low Mg with high K at day 35. These findings indicated that low Mg with high K supply altered sugar partitioning and root morphological parameters, resulting in the increased root to shoot ratio prior to visible Mg deficiency symptoms in rice leaves. The increase in root to shoot ratio maybe an important adaptive mecha-nism for rice plants to respond to low-Mg stress during the early growth stage.
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Claims 14
Claim · model-written summary
Low Mg with high K decreased soluble sugar content in rice leaves by 35.7% at day 15 compared with the control.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Organ / stage
- leavese1
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- soluble sugar contente1
- Direction
- decreasede1
- Value
- 35.7%e1
- Qualifier
- at day 15 after treatment initiatione1
- Comparator
- control (1mM Mg and K)e1
- Setting
- greenhouse conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
Claim · model-written summary
Low Mg with high K increased soluble sugar content in rice roots by 29.2% at day 15 compared with the control.
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- rootse1
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- soluble sugar contente1
- Direction
- increasede1
- Value
- 29.2%e1
- Qualifier
- at day 15 after treatment initiatione1
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
Claim · model-written summary
Low Mg with high K decreased shoot dry weight of rice by 12.9% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- shoote2
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- shoot dry weight (DW)e2
- Direction
- declinede2
- Value
- 12.9%e2
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e2“The shoot dry weight (DW) declined 12.9%, but root DW increased 12.1% leading to the significant increase in the root to shoot ratio at day 30”
Claim · model-written summary
Low Mg with high K increased root dry weight of rice by 12.1% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- roote2
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- root DWe2
- Direction
- increasede2
- Value
- 12.1%e2
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e2“The shoot dry weight (DW) declined 12.9%, but root DW increased 12.1% leading to the significant increase in the root to shoot ratio at day 30”
Claim · model-written summary
Low Mg with high K significantly increased the root to shoot ratio of rice at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- root to shoot ratioe2
- Direction
- increasee2
- Qualifier
- at day 30e2
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e2“The shoot dry weight (DW) declined 12.9%, but root DW increased 12.1% leading to the significant increase in the root to shoot ratio at day 30”
Claim · model-written summary
Low Mg with high K significantly increased total root length of rice by 11.8% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- total root lengthe3
- Direction
- significantly increasede3
- Value
- 11.8%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Low Mg with high K significantly increased total root surface area of rice by 16.4% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- total root surface areae3
- Direction
- significantly increasede3
- Value
- 16.4%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Low Mg with high K significantly increased root volume of rice by 25.3% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- root volumee3
- Direction
- significantly increasede3
- Value
- 25.3%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Low Mg with high K significantly increased average root diameter of rice by 8.1% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- average root diametere3
- Direction
- significantly increasede3
- Value
- 8.1%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Low Mg with high K significantly increased the total length of 0 - 0.5 mm diameter roots of rice by 16.6% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- total length of 0 - 0.5 mme3
- Direction
- significantly increasede3
- Value
- 16.6%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Low Mg with high K significantly increased the total length of 0.5 - 1.0 mm diameter roots of rice by 12.5% at day 30.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Mg (0.01 mM) with high K (6 mM)e1
- Outcome
- 0.5 - 1.0 mm diameter rootse3
- Direction
- significantly increasede3
- Value
- 12.5%e3
- Qualifier
- at day 30e3
- Comparator
- control (1mM Mg and K)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of low magnesium (Mg) with high potassium (K) supply on the Mg concentration, sugar partitioning and root growth of rice (Oryza sativa L. cv. Wuyunjing 7) plants grown in hydroponics under greenhouse conditions”
e1“Compared with the control (1mM Mg and K) treatment, the soluble sugar content at the treatment of low Mg (0.01 mM) with high K (6 mM) decreased by 35.7% in leaves, whereas increased 29.2% in roots at day 15 after treatment initiation”
e3“Furthermore, the total root length, total root surface area, root volume, average root diameter, total length of 0 - 0.5 mm and 0.5 - 1.0 mm diameter roots at day 30 significantly increased by 11.8%, 16.4%, 25.3%, 8.1%, 16.6% and 12.5%, respectively”
Claim · model-written summary
Root to shoot ratio is closely related to soluble sugar contents in roots and to root morphological parameters of rice.
- Taxon
- riceOryza sativae4
- Compound
- soluble sugar contentse4
- Outcome
- root to shoot ratioe4
- Qualifier
- closely relatede4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Correlation analysis revealed the root to shoot ratio is closely related to the soluble sugar contents in roots and root morphological parameters of rice at day 15 and day 30”
Claim · model-written summary
Typical visible symptoms of Mg deficiency appeared in rice leaves under low Mg with high K at day 35.
- Taxon
- riceOryza sativae5
- Organ / stage
- leavese5
- Treatment
- low Mg with high Ke5
- Outcome
- visible symptoms of Mg deficiencye5
- Qualifier
- at day 35e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The typical visible symptoms of Mg deficiency in leaves of rice were obtained in the treatment of low Mg with high K at day 35”
Claim · model-written summary
The increase in root to shoot ratio may be an adaptive mechanism of rice to low-Mg stress in the early growth stage.
- Taxon
- riceOryza sativae6
- Treatment
- low-Mg stresse6
- Outcome
- root to shoot ratioe6
- Qualifier
- adaptive mecha-nisme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The increase in root to shoot ratio maybe an important adaptive mecha-nism for rice plants to respond to low-Mg stress during the early growth stage”
The same questions in other papers
magnesium atom · growth · Oryza sativa (rice)Results differ
10 papers in the same direction as this paper · 5 in the opposite direction
- positive
- negative
- no effect
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- negative
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See all 95 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.