Abstract
[Objective]This experiment was conducted to discuss the water-requirement characteristics of cassava varieties SC 205 and Xinxuan 048 and to provide scientific basis for cassava cultivation and drought resistance breeding. [Method]Cassava varieties SC 205 (main variety grown in Guangxi) and Xinxuan 048 (bred by Guangxi University) were taken as test materials; four treatments, viz., (A) normal water supply (CK), (B) mild drought, (C) moderate drought, and (D) severe drought, were set. The net photosynthetic rate, leaf water potential, leaf membrane permeability, chlorophyll a+b, MDA, PRO, and biomass were measured during the cassava root tube formation period (from May to July) and expanding period (from July to September), and maturity(Sep. to Dec). [Result]The water-stress time of SC 205 was earlier than that of Xinxuan 048. The influence of water-stress on cassava was more obvious in the late growth period. The photosynthesis efficiency of cassava leaves was affected by water stress under drought condition. However, the compensation effect of water stress on the photosynthesis efficiency was likely to appear under the mild and moderate drought conditions. [Conclusion]The order of cassava physiology responses to drought stress was as follows: photosynthetic rate transpirationstomatal conductanceleaf water potential. The appropriate water stress was beneficial to cassava yield formation and starch accumulation. Cassava variety Xinxuan 048 showed stronger drought resistance than that of SC 205 under this experimental condition.
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Claims 9
Claim · model-written summary
SC 205 experienced water stress earlier than Xinxuan 048.
- Taxon
- cassava
Manihot esculentat0 - Material
- SC 205e0
- Outcome
- water-stress timee0
- Direction
- earliere0
- Comparator
- Xinxuan 048e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water-stress time of SC 205 was earlier than that of Xinxuan 048”
t0“cassava”
Claim · model-written summary
Water stress affected cassava more strongly late in growth.
- Taxon
- cassavaManihot esculentae0
- Organ / stage
- late growth periode0
- Treatment
- water-stresse0
- Outcome
- influence of water-stresse0
- Direction
- more obviouse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The influence of water-stress on cassava was more obvious in the late growth period”
Claim · model-written summary
Drought water stress affected photosynthetic efficiency in cassava leaves.
- Taxon
- cassavaManihot esculentae0
- Organ / stage
- cassava leavese0
- Treatment
- water stresse0
- Outcome
- photosynthesis efficiencye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis efficiency of cassava leaves was affected by water stress under drought condition”
Claim · model-written summary
Mild drought may produce a compensatory photosynthetic response.
- Taxon
- cassavaManihot esculentat0
- Treatment
- milde0
- Outcome
- photosynthesis efficiencye0
- Qualifier
- was likely to appeare0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the compensation effect of water stress on the photosynthesis efficiency was likely to appear under the mild and moderate drought conditions”
t0“cassava”
Claim · model-written summary
Moderate drought may produce a compensatory photosynthetic response.
- Taxon
- cassavaManihot esculentat0
- Treatment
- moderate droughte0
- Outcome
- photosynthesis efficiencye0
- Qualifier
- was likely to appeare0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the compensation effect of water stress on the photosynthesis efficiency was likely to appear under the mild and moderate drought conditions”
t0“cassava”
Claim · model-written summary
Photosynthetic rate, transpiration, stomatal conductance and leaf water potential were ordered as cassava drought responses.
- Taxon
- cassavaManihot esculentae0
- Outcome
- cassava physiology responses to drought stresse0
- Qualifier
- photosynthetic rate transpirationstomatal conductanceleaf water potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The order of cassava physiology responses to drought stress was as follows: photosynthetic rate transpirationstomatal conductanceleaf water potential”
Claim · model-written summary
Appropriate water stress benefited cassava yield formation.
- Taxon
- cassavaManihot esculentae0
- Treatment
- appropriate water stresse0
- Outcome
- yield formatione0
- Direction
- beneficiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The appropriate water stress was beneficial to cassava yield formation and starch accumulation”
Claim · model-written summary
Appropriate water stress benefited cassava starch accumulation.
- Taxon
- cassavaManihot esculentae0
- Treatment
- appropriate water stresse0
- Outcome
- starch accumulatione0
- Direction
- beneficiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The appropriate water stress was beneficial to cassava yield formation and starch accumulation”
Claim · model-written summary
Xinxuan 048 showed stronger drought resistance than SC 205 under the experiment conditions.
- Taxon
- CassavaManihot esculentae0
- Material
- Xinxuan 048e0
- Outcome
- drought resistancee0
- Direction
- strongere0
- Qualifier
- under this experimental conditione0
- Comparator
- SC 205e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava variety Xinxuan 048 showed stronger drought resistance than that of SC 205 under this experimental condition”
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See all 20 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.