Abstract
This paper reports the effects of silicon (Si) supplementation (0.35 g Na2SiO3/kg soil, 2.73 mmol Si/kg soil) on some physiological characteristics of canola (Brassica napus L. cv. Okapi) plants grown in pots and treated with or without Si under water stress for 25 days. In this study, Si-supplied plants showed the higher shoot dry weight (SDW), root dry weight (RDW), relative growth rate (RGR), net assimilation rate (NAR), and relative water content (RWC) as compared to those without application of Si under drought conditions. However, Si did not significantly affect dry weight accumulation under well-watered conditions. CO2 absorbance (A) was increased by silicon under water stress conditions. The intracellular CO2 concentration (C i), which was significantly elevated under water stress, was decreased by Si. Silicon application significantly increased the root amino acid content after 20 and 25 days of water stress. In Si-supplemented water-deficit plants, the amount of MDA remained unchanged after 25 days of water stress, obviously because of an efficient scavenging following significant enhancement of superoxide dismutase (SOD) and peroxidase (POD) activities. These results indicated that Si ameliorated growth reduction of drought-stressed canola plants, accompanied by an increase in the root water uptake through the formation of more fine roots and more amino acids as osmotica for supporting water uptake. The results of this study revealed that Si application alleviated water stress damages because of the higher water uptake, better photosynthetic rate, and the lowered lipid peroxidation in canola plants.
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Claims 11
Claim · model-written summary
Silicon-supplied canola under drought had higher shoot dry weight, root dry weight and relative growth rate than unsupplied plants.
- Taxon
- canola
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Brassica napus var. napuse0 - Material
- Okapie0
- Treatment
- Si-suppliede1
- Outcome
- shoot dry weight (SDW), root dry weight (RDW), relative growth rate (RGR)e1
- Direction
- highere1
- Comparator
- without application of Sie1
- Setting
- drought conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e1“Si-supplied plants showed the higher shoot dry weight (SDW), root dry weight (RDW), relative growth rate (RGR), net assimilation rate (NAR), and relative water content (RWC) as compared to those without application of Si under drought conditions”
Claim · model-written summary
Silicon-supplied canola under drought had higher net assimilation rate and relative water content than unsupplied plants.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Si-suppliede1
- Outcome
- net assimilation rate (NAR), and relative water content (RWC)e1
- Direction
- highere1
- Comparator
- without application of Sie1
- Setting
- drought conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e1“Si-supplied plants showed the higher shoot dry weight (SDW), root dry weight (RDW), relative growth rate (RGR), net assimilation rate (NAR), and relative water content (RWC) as compared to those without application of Si under drought conditions”
Claim · model-written summary
Silicon did not significantly affect dry weight accumulation of canola under well-watered conditions.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Sie2
- Outcome
- dry weight accumulatione2
- Direction
- did not significantly affecte2
- Setting
- well-watered conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e2“However, Si did not significantly affect dry weight accumulation under well-watered conditions”
Claim · model-written summary
Silicon increased CO2 absorbance of canola under water stress.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- silicone3
- Outcome
- CO2 absorbance (A)e3
- Direction
- increasede3
- Setting
- water stress conditionse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e3“CO2 absorbance (A) was increased by silicon under water stress conditions”
Claim · model-written summary
Silicon decreased the intracellular CO2 concentration of canola.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Sie4
- Outcome
- intracellular CO2 concentration (C i)e4
- Direction
- decreasede4
- Setting
- water stresse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e4“The intracellular CO2 concentration (C i), which was significantly elevated under water stress, was decreased by Si”
Claim · model-written summary
The intracellular CO2 concentration of canola was significantly elevated under water stress.
- Taxon
- canolaBrassica napus var. napuse0
- Outcome
- intracellular CO2 concentration (C i)e4
- Direction
- elevatede4
- Setting
- water stresse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e4“The intracellular CO2 concentration (C i), which was significantly elevated under water stress, was decreased by Si”
Claim · model-written summary
Silicon significantly increased root amino acid content of canola after 20 and 25 days of water stress.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Silicon applicatione5
- Outcome
- root amino acid contente5
- Direction
- increasede5
- Setting
- 20 and 25 days of water stresse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e5“Silicon application significantly increased the root amino acid content after 20 and 25 days of water stress”
Claim · model-written summary
The amount of MDA in Si-supplemented canola remained unchanged after 25 days of water stress.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Si-supplementede6
- Outcome
- the amount of MDAe6
- Direction
- remained unchangede6
- Setting
- 25 days of water stresse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e6“In Si-supplemented water-deficit plants, the amount of MDA remained unchanged after 25 days of water stress, obviously because of an efficient scavenging following significant enhancement of superoxide dismutase (SOD) and peroxidase (POD) activities”
Claim · model-written summary
Si-supplemented canola showed significantly enhanced superoxide dismutase and peroxidase activities under water stress.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Si-supplementede6
- Outcome
- superoxide dismutase (SOD) and peroxidase (POD) activitiese6
- Direction
- enhancemente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e6“In Si-supplemented water-deficit plants, the amount of MDA remained unchanged after 25 days of water stress, obviously because of an efficient scavenging following significant enhancement of superoxide dismutase (SOD) and peroxidase (POD) activities”
Claim · model-written summary
Silicon alleviated water stress damage in canola.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Si applicatione7
- Outcome
- water stress damagese7
- Direction
- alleviatede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e7“The results of this study revealed that Si application alleviated water stress damages because of the higher water uptake, better photosynthetic rate, and the lowered lipid peroxidation in canola plants”
Claim · model-written summary
Silicon-supplied canola formed more fine roots and accumulated more amino acids, which the authors propose raises root water uptake under drought.
- Taxon
- canolaBrassica napus var. napuse0
- Compound
- amino acidse1
- Outcome
- root water uptakee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canola (Brassica napus L. cv. Okapi) plants”
e1“accompanied by an increase in the root water uptake through the formation of more fine roots and more amino acids as osmotica for supporting water uptake”
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