Abstract
Despite the likely increasing co-occurrence of drought and heat stress, not least in equatorial regions, due to climate change, little is known about the combinational effect of these stresses on rice productivity and quality. This study evaluated the impact of simultaneous drought and temperature stress on growth, grain yield, and quality characteristics of seven rice cultivars from Rwanda, grown in climate chambers. Two temperature ranges-23/26 °C night/day and 27/30 °C night/day-together with single or repeated drought treatments, were applied during various plant developmental stages. Plant development and yield were highly influenced by drought, while genotype impacted the quality characteristics. The combination of a high temperature with drought at the seedling and tillering stages resulted in zero panicles for all evaluated cultivars. The cultivar 'Intsindagirabigega' was most tolerant to drought, while 'Zong geng' was the most sensitive. A "stress memory" was recorded for 'Mpembuke' and 'Ndamirabahinzi', and these cultivars also had a high content of bioactive compounds, while 'Jyambere' showed a high total protein content. Thus, climate change may severely impact rice production. The exploitation of genetic diversity to breed novel rice cultivars that combine drought and heat stress tolerance with high nutritional values is a must to maintain food security.
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Claims 11
Claim · model-written summary
Drought strongly influenced rice development and yield.
- Taxon
- Rice
Oryza sativat0 - Treatment
- droughte0
- Outcome
- Plant development and yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Plant development and yield were highly influenced by drought”
Claim · model-written summary
Rice genotype influenced quality characteristics.
- Taxon
- RiceOryza sativat0
- Material
- genotypee0
- Outcome
- quality characteristicse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“genotype impacted the quality characteristics”
Claim · model-written summary
Combined high temperature and drought at seedling and tillering stages resulted in zero panicles for all evaluated rice cultivars.
- Taxon
- RiceOryza sativat0
- Organ / stage
- seedling and tillering stagese0
- Treatment
- high temperature with droughte0
- Outcome
- paniclese0
- Value
- zero paniclese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The combination of a high temperature with drought at the seedling and tillering stages resulted in zero panicles for all evaluated cultivars”
Claim · model-written summary
'Intsindagirabigega' was the most drought-tolerant rice cultivar.
- Taxon
- RiceOryza sativat0
- Material
- 'Intsindagirabigega'e0
- Outcome
- tolerant to droughte0
- Direction
- most tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The cultivar 'Intsindagirabigega' was most tolerant to drought”
Claim · model-written summary
'Zong geng' was the most drought-sensitive rice cultivar.
- Taxon
- RiceOryza sativat0
- Material
- 'Zong geng'e0
- Outcome
- most sensitivee0
- Direction
- most sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“'Zong geng' was the most sensitive”
Claim · model-written summary
'Mpembuke' showed stress memory under the study conditions.
- Taxon
- RiceOryza sativat0
- Material
- 'Mpembuke'e0
- Outcome
- stress memorye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“A "stress memory" was recorded for 'Mpembuke' and 'Ndamirabahinzi'”
Claim · model-written summary
'Mpembuke' had high bioactive compound content.
- Taxon
- RiceOryza sativat0
- Material
- 'Mpembuke'e0
- Outcome
- content of bioactive compoundse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“'Mpembuke' and 'Ndamirabahinzi', and these cultivars also had a high content of bioactive compounds”
Claim · model-written summary
'Ndamirabahinzi' showed stress memory under the study conditions.
- Taxon
- RiceOryza sativat0
- Material
- 'Ndamirabahinzi'e0
- Outcome
- stress memorye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“A "stress memory" was recorded for 'Mpembuke' and 'Ndamirabahinzi'”
Claim · model-written summary
'Ndamirabahinzi' had high bioactive compound content.
- Taxon
- RiceOryza sativat0
- Material
- 'Ndamirabahinzi'e0
- Outcome
- content of bioactive compoundse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“'Mpembuke' and 'Ndamirabahinzi', and these cultivars also had a high content of bioactive compounds”
Claim · model-written summary
'Jyambere' had high total protein content.
- Taxon
- RiceOryza sativat0
- Material
- 'Jyambere'e0
- Outcome
- total protein contente0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“'Jyambere' showed a high total protein content”
Claim · model-written summary
The authors recommend exploiting rice genetic diversity to breed cultivars combining heat and drought tolerance with nutritional value.
- Taxon
- RiceOryza sativat0
- Outcome
- breed novel rice cultivars that combine drought and heat stress tolerance with high nutritional valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The exploitation of genetic diversity to breed novel rice cultivars that combine drought and heat stress tolerance with high nutritional values is a must to maintain food security”
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See all 325 papers →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.