Abstract
Magnesium (Mg) is essential to many plant physiological and biochemical processes; however, understanding how Mg nutrition quantitatively affects the production, partitioning, and utilization of photoassimilates is still lacking, especially in soilless culture systems. We focused on the roles of Mg in yield formation and interactions with potassium (K) nutrition of cherry tomato. Cherry tomato yield, photosynthetic parameters, dry matter weight, and K, Mg, and calcium (Ca) uptake were investigated in two soilless experiments with seven Mg levels and five K levels. The results showed that low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%. The critical leaf Mg concentrations required for adequate photosynthate production in the first and second harvest periods were 4.67 and 5.52 g·kg−1, respectively. However, over-supply of Mg reduced leaf K and Ca concentrations and limited plant uptake of K and Ca. Moreover, adjusting K concentrations in solution could influence plant Mg functions in photosynthesis and, therefore, cherry tomato growth. Overall, balanced Mg and K application increased Mg, K, and Ca uptake, as well as Mg concentrations in leaves, which could maintain a sustainable photosynthetic rate and plant dry matter formation.
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Claims 8
Claim · model-written summary
Low and high Mg supply limited cherry tomato yield in soilless culture.
- Taxon
- cherry tomato
Solanum lycopersicum var. cerasiformee1 - Treatment
- low (<1 mM) and high (>4 mM) Mg supplye1
- Outcome
- yielde1
- Direction
- limitede1
- Setting
- soilless culture systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially in soilless culture systems”
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
Claim · model-written summary
Low and high Mg supply decreased dry matter accumulation of cherry tomato by 22.6–78.1%.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Treatment
- low (<1 mM) and high (>4 mM) Mg supplye1
- Outcome
- dry matter accumulatione1
- Direction
- decreasinge1
- Value
- 22.6–78.1%e1
- Setting
- soilless culture systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially in soilless culture systems”
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
Claim · model-written summary
Low and high Mg supply decreased harvest index of cherry tomato by 13.9–40.7%.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Treatment
- low (<1 mM) and high (>4 mM) Mg supplye1
- Outcome
- harvest indexe1
- Direction
- decreasinge1
- Value
- 13.9–40.7%e1
- Setting
- soilless culture systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially in soilless culture systems”
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
Claim · model-written summary
Critical leaf Mg concentrations for adequate photosynthate production were 4.67 and 5.52 g·kg−1 in the first and second harvest periods of cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Organ / stage
- leafe2
- Outcome
- critical leaf Mg concentrationse2
- Value
- 4.67 and 5.52 g·kg−1e2
- Qualifier
- first and second harvest periodse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
e2“The critical leaf Mg concentrations required for adequate photosynthate production in the first and second harvest periods were 4.67 and 5.52 g·kg−1”
Claim · model-written summary
Over-supply of Mg reduced leaf K and Ca concentrations in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Treatment
- over-supply of Mge3
- Outcome
- leaf K and Ca concentrationse3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
e3“over-supply of Mg reduced leaf K and Ca concentrations and limited plant uptake of K and Ca”
Claim · model-written summary
Over-supply of Mg limited plant uptake of K and Ca in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Treatment
- over-supply of Mge3
- Outcome
- plant uptake of K and Cae3
- Direction
- limitede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
e3“over-supply of Mg reduced leaf K and Ca concentrations and limited plant uptake of K and Ca”
Claim · model-written summary
Balanced Mg and K application increased Mg, K and Ca uptake in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Treatment
- balanced Mg and K applicatione4
- Outcome
- Mg, K, and Ca uptakee4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
e4“balanced Mg and K application increased Mg, K, and Ca uptake, as well as Mg concentrations in leaves”
Claim · model-written summary
Balanced Mg and K application increased Mg concentrations in leaves of cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee1
- Organ / stage
- leavese4
- Treatment
- balanced Mg and K applicatione4
- Outcome
- Mg concentrations in leavese4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by 22.6–78.1% and harvest index by 13.9–40.7%”
e4“balanced Mg and K application increased Mg, K, and Ca uptake, as well as Mg concentrations in leaves”
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See all 41 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.