Abstract
The effects of presowing drought hardening of wheat on subsequent leaf relative water content (RWC) and grain yield were assessed under a number of environmental conditions. In general, the treatment reduced the rate at which critical levels of RWC developed during periods of moisture stress, but not necessarily the final value to which the RWC fell. No differences were found in any of the measured parameters during periods when there were no internal water deficits. Grain yield increases due to the hardening treatment varied "from 0 to 20%" in the different experiments. This variation is explained in terms of both the phenological stage at which RWC differences occurred and the transient effect of the RWC differences. The results are also discussed in relation to both the cause of the observed RWC differences and the potential practical role of the technique in arid zone agriculture.
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Claims 4
Claim · model-written summary
Presowing drought hardening slowed the development of critical leaf relative water content during moisture stress.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- presowing drought hardeningt0
- Outcome
- rate at which critical levels of RWC developede0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“presowing drought hardening of wheat”
e0“the treatment reduced the rate at which critical levels of RWC developed during periods of moisture stress”
Claim · model-written summary
Hardening did not necessarily change the final leaf relative water content during moisture stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- presowing drought hardeningt0
- Outcome
- final value to which the RWC felle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“presowing drought hardening of wheat”
e0“but not necessarily the final value to which the RWC fell”
Claim · model-written summary
No measured parameters differed during periods without internal water deficits.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- measured parameterse0
- Direction
- No differencese0
- Qualifier
- during periods when there were no internal water deficitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“No differences were found in any of the measured parameters during periods when there were no internal water deficits”
Claim · model-written summary
Hardening increased grain yield by 0 to 20% across experiments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- hardening treatmente0
- Outcome
- Grain yielde0
- Direction
- increasese0
- Value
- 0 to 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“presowing drought hardening of wheat”
e0“Grain yield increases due to the hardening treatment varied "from 0 to 20%" in the different experiments”
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