Abstract
Abstract. Long‐term effects of transpiration on growth and on long‐distance ion transport were investigated in maize over a whole growth cycle. Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity. Although the amount of water lost by the plants under these conditions differed by a factor 2 to 3, there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants. This was also found when the upper part of the shoot (70–150 cm) was tested separately. It is suggested that transpiration is not essential for long‐distance transport of mineral elements in plants. Alternatives are discussed.
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Claims 5
Claim · model-written summary
Water loss differed by a factor of two to three across humidity conditions.
- Treatment
- >95% relative humiditye1
- Outcome
- amount of water loste0
- Direction
- differede0
- Value
- factor 2 to 3e0
- Comparator
- 50–60%e1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of water lost by the plants under these conditions differed by a factor 2 to 3”
e1“Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity”
e2“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
Claim · model-written summary
High humidity did not decrease maize fresh or dry weight.
- Treatment
- >95% relative humiditye1
- Outcome
- growth (fresh weight and dry weight)e0
- Direction
- neither a decreasee0
- Comparator
- 50–60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
e1“Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity”
e2“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
Claim · model-written summary
High humidity did not decrease maize ash content.
- Treatment
- >95% relative humiditye1
- Outcome
- ash contente0
- Direction
- neither a decreasee0
- Comparator
- 50–60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
e1“Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity”
e2“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
Claim · model-written summary
The upper shoot also showed no decrease in growth or ash content under high humidity.
- Organ / stage
- upper part of the shoote0
- Treatment
- >95% relative humiditye1
- Outcome
- upper part of the shoote0
- Direction
- neither a decreasee2
- Comparator
- 50–60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was also found when the upper part of the shoot (70–150 cm) was tested separately”
e1“Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity”
e2“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
Claim · model-written summary
The authors suggest transpiration is not essential for long-distance mineral transport.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that transpiration is not essential for long‐distance transport of mineral elements in plants”
e1“Maize plants were grown with nutrients supplied at adequate levels in hydroculture or in soil at 50–60% and at >95% relative humidity”
e2“there was neither a decrease in growth (fresh weight and dry weight) nor in ash content of the ‘humid’plants”
The same questions in other papers
humidity · quality: grain · Zea mays (maize)Positive and negative results
1 reporting no difference from an alternative
- positive
humidity · growth · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
- negative
1 paper more in this group
See all 5 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.