Abstract
High atmospheric humidity promotes vegetative growth and dry-matter production in japonica rice. In this study, the varietal differences in the response to atmospheric humidity were examined using three japonica varieties (Nipponbare, Kinmaze, Yamadanishiki), one indica variety IR24 and japonica × indica variety (Milyang 23). The indica and japonica × indica varieties are referred to as indica varieties hereafter. The growth of the japonica varieties was greatly promoted by high humidity (90%) and greatly reduced by low humidity (60%), but that of the indica varieties was less sensitive to humidity and the growth was hardly affected by low humidity. We compared the responses of the above varieties to low humidity (water stress) using the plants under high humidity as a control. Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density, longer stornata and larger stomatal aperture, resulting in a lower water potential in leaf blades and lower water -use efficiency. Under high humidity, the japonica and indica varieties showed a similar transpiration rate (per unit area), stomatal aperture and water-use efficiency, but the japonica varieties had a higher water content than the indica varieties. This may be why the japonica varieties show greatly suppressed growth and dry matter production under low humidity. These differences between the japonica and indica varieties in morphophysiological characters under low humidity might cause the varietal differences in the plant growth and dry matter production in rice.
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Claims 12
Claim · model-written summary
High humidity greatly promoted japonica growth.
- Taxon
- Rice
Oryza sativat0 - Material
- japonica varietiese0
- Treatment
- high humidity (90%)e0
- Outcome
- growthe0
- Direction
- greatly promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The growth of the japonica varieties was greatly promoted by high humidity (90%)”
Claim · model-written summary
Low humidity greatly reduced japonica growth.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Treatment
- low humidity (60%)e0
- Outcome
- growthe0
- Direction
- greatly reducede0
- Comparator
- high humidity (90%)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The growth of the japonica varieties was greatly promoted by high humidity (90%) and greatly reduced by low humidity (60%)”
Claim · model-written summary
Indica growth was less sensitive to humidity.
- Taxon
- RiceOryza sativat0
- Material
- indica varietiese0
- Outcome
- less sensitive to humiditye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“that of the indica varieties was less sensitive to humidity and the growth was hardly affected by low humidity.”
Claim · model-written summary
Low humidity hardly affected indica growth.
- Taxon
- RiceOryza sativat0
- Material
- indica varietiese1
- Treatment
- low humiditye0
- Outcome
- growthe0
- Direction
- hardly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the growth was hardly affected by low humidity.”
e1“the indica varieties was less sensitive to humidity”
Claim · model-written summary
Under low humidity japonica had higher stomatal density than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- stomatal densitye0
- Direction
- highere0
- Qualifier
- low humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density”
Claim · model-written summary
Under low humidity japonica had longer stomata than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- stornatae0
- Direction
- longere0
- Qualifier
- low humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density, longer stornata”
Claim · model-written summary
Under low humidity japonica had larger stomatal aperture than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- stomatal aperturee0
- Direction
- largere0
- Qualifier
- low humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density, longer stornata and larger stomatal aperture”
Claim · model-written summary
Under low humidity japonica had lower leaf water potential than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- water potential in leaf bladese0
- Direction
- lowere0
- Qualifier
- low humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density, longer stornata and larger stomatal aperture, resulting in a lower water potential in leaf blades”
Claim · model-written summary
Under low humidity japonica had lower water-use efficiency than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- water -use efficiencye0
- Direction
- lowere0
- Qualifier
- low humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under low humidity, as compared to the indica varieties, the japonica varieties had a higher stomatal density, longer stornata and larger stomatal aperture, resulting in a lower water potential in leaf blades and lower water -use efficiency.”
Claim · model-written summary
At high humidity, japonica and indica had similar transpiration rate, stomatal aperture and water-use efficiency.
- Taxon
- RiceOryza sativat0
- Material
- japonicae0
- Outcome
- transpiration rate (per unit area), stomatal aperture and water-use efficiencye0
- Direction
- similare0
- Qualifier
- high humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under high humidity, the japonica and indica varieties showed a similar transpiration rate (per unit area), stomatal aperture and water-use efficiency”
Claim · model-written summary
At high humidity japonica had higher water content than indica.
- Taxon
- RiceOryza sativat0
- Material
- japonica varietiese0
- Outcome
- water contente0
- Direction
- highere0
- Qualifier
- high humiditye0
- Comparator
- indica varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under high humidity, the japonica and indica varieties showed a similar transpiration rate (per unit area), stomatal aperture and water-use efficiency, but the japonica varieties had a higher water content than the indica varieties.”
Claim · model-written summary
The authors suggest humidity-related water relations may explain japonica growth suppression.
- Taxon
- RiceOryza sativat0
- Outcome
- greatly suppressed growth and dry matter productione0
- Qualifier
- higher water contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“This may be why the japonica varieties show greatly suppressed growth and dry matter production under low humidity.”
e1“the japonica varieties had a higher water content than the indica varieties.”
The same questions in other papers
humidity · growth · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
10 papers more in this group
See all 14 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.