Abstract
Abstract Waterlogging causes long‐lasting damage to wheat ( Triticum aestivum ). Root growth and respiration were investigated after heading in waterlogged, pot‐grown, wheat plants and also in hydroponically grown, wheat seedlings exposed to a hypoxic treatment. In the pot experiment, plants were subjected to 8 days of waterlogging after heading. This period of waterlogging resulted in reduced shoot and root growth through to maturity. The root CO 2 emission rates of previously waterlogged and well‐drained plants were about 220 and 140 nmol g −1 per s, respectively, with the rate differences persisting from 10 days after anthesis through to maturity. In the hydroponic experiments, seedlings (Feekes stage 2.0) were exposed to root‐zone, hypoxic treatment for 10–19 days. The roots showed 27 % higher CO 2 emission rates and 37 % higher O 2 consumption rates, compared with untreated roots. In whole root systems, the high respiration rates found during hypoxic treatment disappeared during recovery under aerated conditions as a result of the appearance of newly initiated roots. However, measurements of the respiration of the previously hypoxic roots showed abnormally high respiration rates. In roots exposed to hypoxic treatment, total sugar concentrations were 3.6‐times higher than in untreated roots indicating that this elevation of sugar may be responsible for the continued high respiration rate. This study shows that roots exposed to waterlogging or to hypoxic treatments do not increase their weights and thus recover from the metabolic disturbances resulting from these treatments.
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Claims 9
Claim · model-written summary
Eight days of waterlogging reduced wheat shoot and root growth through maturity.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- waterlogginge0
- Outcome
- shoot and root growthe0
- Direction
- reducede0
- Qualifier
- through to maturitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This period of waterlogging resulted in reduced shoot and root growth through to maturity”
t0“Wheat Root Growth”
Claim · model-written summary
Previously waterlogged roots had higher carbon dioxide emission than well-drained roots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- previously waterloggede0
- Outcome
- root CO 2 emission ratese0
- Value
- 220 and 140 nmol g −1 per se0
- Comparator
- well‐drained plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root CO 2 emission rates of previously waterlogged and well‐drained plants were about 220 and 140 nmol g −1 per s, respectively”
t0“Wheat Root Growth”
Claim · model-written summary
Hypoxic seedlings had 27% higher root carbon dioxide emission rates.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- hypoxic treatmente1
- Outcome
- CO 2 emission ratese0
- Direction
- highere0
- Value
- 27 %e0
- Comparator
- untreated rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots showed 27 % higher CO 2 emission rates and 37 % higher O 2 consumption rates, compared with untreated roots”
t0“Hypoxia have Permanent Effects on Wheat Root Growth”
e1“hypoxic treatment for 10–19 days”
Claim · model-written summary
Hypoxic seedlings had 37% higher root oxygen consumption rates.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- hypoxic treatmente1
- Outcome
- O 2 consumption ratese0
- Direction
- highere0
- Value
- 37 %e0
- Comparator
- untreated rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots showed 27 % higher CO 2 emission rates and 37 % higher O 2 consumption rates, compared with untreated roots”
t0“Hypoxia have Permanent Effects on Wheat Root Growth”
e1“hypoxic treatment for 10–19 days”
Claim · model-written summary
Whole-root elevated respiration disappeared during aerated recovery with newly initiated roots.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- newly initiated rootse0
- Outcome
- high respiration ratese0
- Qualifier
- recovery under aerated conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high respiration rates found during hypoxic treatment disappeared during recovery under aerated conditions as a result of the appearance of newly initiated roots”
t0“Wheat Root Growth”
Claim · model-written summary
Previously hypoxic roots retained abnormally high respiration rates.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- previously hypoxic rootse0
- Outcome
- respiration ratese0
- Direction
- abnormally highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the respiration of the previously hypoxic roots showed abnormally high respiration rates”
t0“Wheat Root Growth”
Claim · model-written summary
Hypoxic roots had 3.6 times higher total sugar concentrations than untreated roots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- hypoxic treatmente1
- Outcome
- total sugar concentrationse0
- Direction
- highere0
- Value
- 3.6‐timese0
- Comparator
- untreated rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total sugar concentrations were 3.6‐times higher than in untreated roots”
t0“Hypoxia have Permanent Effects on Wheat Root Growth”
e1“hypoxic treatment for 10–19 days”
Claim · model-written summary
Elevated sugar may explain persistent high respiration.
- Taxon
- wheatTriticum aestivumt0
- Compound
- sugare0
- Outcome
- continued high respiration ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this elevation of sugar may be responsible for the continued high respiration rate”
t0“Wheat Root Growth”
Claim · model-written summary
Exposed roots failed to regain weight after waterlogging or hypoxia.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- rootse0
- Outcome
- weightse0
- Direction
- do not increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots exposed to waterlogging or to hypoxic treatments do not increase their weights”
t0“Wheat Root Growth”