Abstract
There is considerable intra-and interspecific variation in boron (B) toxicity tolerance in crop plants. In this study, we aimed to investigate the mechanisms involved in tolerance to excess B in barley (Hordeum vulgare) in the early stages of plant development. To do this, B-sensitive (B?lb?l-89) and B-tolerant (Tarm-92) barley cultivars were grown hydroponically under control and B stress conditions (10 mM H3BO3) for 4 or 7 days. The hydrogen peroxide (H2O2), malondialdehyde (MDA), total phenolic, total flavonoid, anthocyanin, proline, and total sugar contents, as well as DPPH radical scavenging capacity, were then determined for both cultivars. Our results showed that B treatment led to significant increases in the B concentration of the barley cultivars for both exposure times. However, there were no drastic differences in the B concentration of the roots and shoots between the sensitive and tolerant cultivars. While the dry root weight of B?lb?l-89 was reduced after 7 days of B stress (p < 0.05), such a decrease was not observed in Tarm-92. The H2O2, MDA, proline, total sugar, and anthocyanin contents of both cultivars increased considerably in response to excess B during at least one treatment period (p < 0.05). The H2O2 content of Tarm-92 under control and B stress conditions was significantly greater than that of B?lb?l-89, but there was no difference in the MDA content and radical scavenging capacity between the two cultivars. Finally, a 35% increase was found in the total flavonoid content of the Tarm-92 seedlings exposed to B stress for 4 days. In conclusion, the findings of this study suggest that tolerance to B toxicity in barley seedlings may be related to their capacity to tolerate higher levels of reactive oxygen species.
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Claims 9
Claim · model-written summary
Boron treatment significantly raised barley boron concentration at both exposure times.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- B treatmente1
- Outcome
- B concentratione1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Our results showed that B treatment led to significant increases in the B concentration of the barley cultivars for both exposure times.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Sensitive and tolerant barley had no drastic root or shoot boron concentration difference.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- B concentratione1
- Direction
- no drastic differencese1
- Comparator
- sensitive and tolerant cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“However, there were no drastic differences in the B concentration of the roots and shoots between the sensitive and tolerant cultivars.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Seven days of boron stress reduced dry root weight of sensitive B?lb?l-89 barley.
- Taxon
- barleyHordeum vulgaret0
- Material
- B?lb?l-89e1
- Treatment
- 7 days of B stresse1
- Outcome
- dry root weighte1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“While the dry root weight of B?lb?l-89 was reduced after 7 days of B stress (p < 0.05), such a decrease was not observed in Tarm-92.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Dry root weight did not decrease in Tarm-92 after seven days of boron stress.
- Taxon
- barleyHordeum vulgaret0
- Material
- Tarm-92e1
- Treatment
- 7 days of B stresse1
- Outcome
- dry root weighte1
- Direction
- such a decrease was not observede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“While the dry root weight of B?lb?l-89 was reduced after 7 days of B stress (p < 0.05), such a decrease was not observed in Tarm-92.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Excess boron increased H2O2, MDA, proline, sugar, and anthocyanin contents in both barley cultivars during at least one period.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- excess Be1
- Outcome
- H2O2, MDA, proline, total sugar, and anthocyanin contentse1
- Direction
- increased considerablye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The H2O2, MDA, proline, total sugar, and anthocyanin contents of both cultivars increased considerably in response to excess B during at least one treatment period (p < 0.05).”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Tarm-92 had greater H2O2 than B?lb?l-89 under control and boron stress.
- Taxon
- barleyHordeum vulgaret0
- Material
- Tarm-92e1
- Outcome
- H2O2 contente1
- Direction
- significantly greatere1
- Comparator
- B?lb?l-89e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The H2O2 content of Tarm-92 under control and B stress conditions was significantly greater than that of B?lb?l-89, but there was no difference in the MDA content and radical scavenging capacity between the two cultivars.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
The cultivars did not differ in MDA content.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- MDA contente1
- Direction
- no differencee1
- Comparator
- two cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The H2O2 content of Tarm-92 under control and B stress conditions was significantly greater than that of B?lb?l-89, but there was no difference in the MDA content and radical scavenging capacity between the two cultivars.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
The cultivars did not differ in radical scavenging capacity.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- radical scavenging capacitye1
- Direction
- no differencee1
- Comparator
- two cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The H2O2 content of Tarm-92 under control and B stress conditions was significantly greater than that of B?lb?l-89, but there was no difference in the MDA content and radical scavenging capacity between the two cultivars.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
Claim · model-written summary
Four days of boron stress increased Tarm-92 seedling flavonoids by 35%.
- Taxon
- barleyHordeum vulgaret0
- Material
- Tarm-92e1
- Treatment
- B stress for 4 dayse1
- Outcome
- total flavonoid contente1
- Direction
- increasee1
- Value
- 35%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Finally, a 35% increase was found in the total flavonoid content of the Tarm-92 seedlings exposed to B stress for 4 days.”
t0“Boron toxicity tolerance in barley may be related to intrinsically higher levels of reactive oxygen species in the shoots”
The same questions in other papers
boron atom · growth · Hordeum vulgare (barley)Results differ
3 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →boron atom · quality: phytochemicals · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- negative
boron atom · nutrient: content · Hordeum vulgare (barley)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.