Abstract
Information on the nutritional status of plants enables adequate fertilisation management. Thus, the aim of this study was to evaluate how nutritional disorders alter the biological, nutritional and biochemical mechanisms of broccoli (Brassica oleracea var. italica L.) plants grown under greenhouse conditions. A complete nutrient solution and omissions of macronutrients were tested in a completely randomised design with four replicates. Broccoli plants grown with the omission of N and Ca were the first of show deficiency symptoms and the greatest reduction in the net photosynthetic rate and stomatal conductance, with evidently impaired plant growth and biomass. Omissions of macronutrients affected carbohydrate partitioning, and the content of soluble sugars significantly decreased by more 60% in response to Mg omission. With K omission, the contents of soluble sugars and starch increased in broccoli leaves by 40% and 60%, respectively. K transport increased in plants grown without Ca. S translocation decreased with the absence of any macronutrient in the nutrient solution. Deficiencies in the nutrients N, K, and Ca cause the most critical early damage in the photosynthetic apparatus and in the nutritional balance of broccoli plants, so attention should be given to replenishing these nutrients in plantations.
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Claims 10
Claim · model-written summary
N and Ca omissions produced the earliest deficiency symptoms.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Treatment
- omission of N and Cae0
- Outcome
- deficiency symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broccoli plants grown with the omission of N and Ca were the first of show deficiency symptoms and the greatest reduction in the net photosynthetic rate and stomatal conductance, with evidently impaired plant growth and biomass.”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
N and Ca omissions caused the greatest reduction in photosynthetic rate and stomatal conductance.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- omission of N and Cae0
- Outcome
- net photosynthetic rate and stomatal conductancee0
- Direction
- greatest reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broccoli plants grown with the omission of N and Ca were the first of show deficiency symptoms and the greatest reduction in the net photosynthetic rate and stomatal conductance, with evidently impaired plant growth and biomass.”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
N and Ca omission impaired growth and biomass.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- omission of N and Cae0
- Outcome
- plant growth and biomasse0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broccoli plants grown with the omission of N and Ca were the first of show deficiency symptoms and the greatest reduction in the net photosynthetic rate and stomatal conductance, with evidently impaired plant growth and biomass.”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
Macronutrient omissions affected carbohydrate partitioning.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- Omissions of macronutrientse0
- Outcome
- carbohydrate partitioninge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Omissions of macronutrients affected carbohydrate partitioning”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
Mg omission decreased soluble sugar content by more than 60%.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- Mg omissione0
- Outcome
- content of soluble sugarse0
- Direction
- decreasede0
- Value
- more 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of soluble sugars significantly decreased by more 60% in response to Mg omission”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
K omission increased leaf soluble sugars by 40%.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- K omissione0
- Outcome
- contents of soluble sugarse0
- Direction
- increasede0
- Value
- 40%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With K omission, the contents of soluble sugars and starch increased in broccoli leaves by 40% and 60%, respectively”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
K omission increased leaf starch by 60%.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- K omissione0
- Outcome
- starche0
- Direction
- increasede0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With K omission, the contents of soluble sugars and starch increased in broccoli leaves by 40% and 60%, respectively”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
Ca omission increased K transport.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- without Cae0
- Outcome
- K transporte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K transport increased in plants grown without Ca”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
Any macronutrient omission decreased S translocation.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- absence of any macronutriente0
- Outcome
- S translocatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S translocation decreased with the absence of any macronutrient in the nutrient solution”
t0“Broccoli (Brassica oleracea var. italica L.) Plants”
Claim · model-written summary
The authors recommend replenishing N, K and Ca in plantations.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Outcome
- replenishing these nutrients in plantationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficiencies in the nutrients N, K, and Ca cause the most critical early damage in the photosynthetic apparatus and in the nutritional balance of broccoli plants, so attention should be given to replenishing these nutrients in plantations.”
The same questions in other papers
calcium atom · physiology: photosynthesis · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
calcium atom · growth · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.