Abstract
Several sensors have been developed for soil and plants to assess plant stress due to climate change. Therefore, the objective of the study is to nondestructively evaluate temperature stress on plant by monitoring climatic and soil conditions and plant responses using various sensors. Plant responses were monitored by electrical conductivity in plant stem and sap flow rate. Electrical conductivity in plant stem reflects the physiological activity of plants including water and ion transport. Fully grown Brassica oleracea var. italica was exposed to 20/15 o C (day/night) with 16 h photoperiods as a control, low temperature 15/10 o C, and high temperature 35/30 o C while climatic, soil, and plant conditions were monitored. Electrical conductivity in plant stem and sap flow rate increased during the day and decreased at night. Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control while under high temperature stress, it was higher than control indicating that water and ion transport was affected. However, chlorophyll a and b increased in leaves subjected to low temperature stress and there was no significant difference between high temperature stressed leaves and control. Free proline contents in the leaves did not increase under low temperature stress, but increased under high temperature stress. Proline synthesis in plant is a defense mechanism under environmental stress. Therefore, Brassica oleracea var. Italica appears to be more susceptible to high temperature stress than low temperature.
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Claims 8
Claim · model-written summary
Stem electrical conductivity and sap flow rate rose by day and fell at night.
- Taxon
- Brassica oleracea var. italica
Brassica oleracea var. italicae0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrical conductivity in plant stem and sap flow rate increased during the day and decreased at night.”
t0“Brassica oleracea var. italica”
Claim · model-written summary
Low temperature lowered stem electrical conductivity relative to control.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0
- Treatment
- low temperature stresse0
- Outcome
- electrical conductivity in plant steme0
- Direction
- lowere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control”
Claim · model-written summary
High temperature raised stem electrical conductivity relative to control.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0t0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high temperature stress, it was higher than control”
t0“Brassica oleracea var. italica”
e1“Electrical conductivity in plant stem and sap flow rate increased during the day and decreased at night.”
Claim · model-written summary
Low temperature increased leaf chlorophyll a and b.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0t0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll a and b increased in leaves subjected to low temperature stress”
t0“Brassica oleracea var. italica”
e1“Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control”
Claim · model-written summary
High temperature produced no significant difference in leaf chlorophyll a and b from control.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0t0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant difference between high temperature stressed leaves and control”
t0“Brassica oleracea var. italica”
e1“chlorophyll a and b increased in leaves subjected to low temperature stress”
Claim · model-written summary
Leaf free proline did not increase under low temperature stress.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0t0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Free proline contents in the leaves did not increase under low temperature stress”
t0“Brassica oleracea var. italica”
e1“Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control”
Claim · model-written summary
Leaf free proline increased under high temperature stress.
- Taxon
- Brassica oleracea var. italicaBrassica oleracea var. italicae0t0e1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased under high temperature stress”
t0“Brassica oleracea var. italica”
e1“Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control”
e2“Free proline contents in the leaves did not increase under low temperature stress”
Claim · model-written summary
Broccoli appeared more susceptible to high than low temperature stress.
- Taxon
- Brassica oleracea var. ItalicaBrassica oleracea var. italicae0
- Treatment
- high temperature stresse0
- Outcome
- susceptiblee0
- Direction
- more susceptiblee0
- Comparator
- low temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica oleracea var. Italica appears to be more susceptible to high temperature stress than low temperature.”
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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.