Abstract
Cassava (Manihot esculenta Crantz) is an important crop in Africa, Asia, Latin America, and the Caribbean. This species grows adequately in drought conditions and is ideal to ensure food safety in marginal environments, such as soils with low fertility and low rainfall conditions. Complementary irrigation practices can be used, or genotypes with good yield potential can be identified against these conditions to enhance productivity in those environments. For this reason, this research aimed to study several physiological mechanisms and agronomical characteristics in eight cassava clones under prolonged water deficit. The experimental design was a split-plot where the principal plot was composed of three irrigation treatments (7, 15, and 21 days without irrigation, DWI) and the secondary plot by the eight clones. The results showed that cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata, avoiding water losses through transpiration. The variables of the net assimilation rate of CO2, yield, and biomass accumulation were not affected by the maximum drought period. The best clones under drought were Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1. The frequency of irrigation 15 DWI increased the variables of gas exchange and vegetative growth. This behavior is due to the ability to tolerate complex conditions through morphological and physiological mechanisms, among them, long life leaf, stomatal control, and high photosynthetic potential.
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Claims 6
Claim · model-written summary
At 21 days without irrigation, cassava growth and foliar expansion decreased.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- 21 DWIe0
- Outcome
- growth, foliar expansione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata”
Claim · model-written summary
At 21 days without irrigation, cassava stomata partially closed, limiting transpiration losses.
- Taxon
- cassavaManihot esculentae0
- Treatment
- 21 DWIe0
- Outcome
- partially closed the stomatae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata, avoiding water losses through transpiration”
Claim · model-written summary
The maximum drought period did not affect net CO2 assimilation, yield, or biomass accumulation.
- Taxon
- yucaManihot esculentat0
- Treatment
- maximum drought periode0
- Outcome
- net assimilation rate of CO2, yield, and biomass accumulatione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yuca”
e0“The variables of the net assimilation rate of CO2, yield, and biomass accumulation were not affected by the maximum drought period.”
Claim · model-written summary
Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1 were the best drought-performing clones.
- Taxon
- yucaManihot esculentat0
- Outcome
- best clones under droughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yuca”
e0“The best clones under drought were Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1.”
Claim · model-written summary
A 15-day irrigation interval increased gas exchange and vegetative growth.
- Taxon
- yucaManihot esculentat0
- Treatment
- irrigation 15 DWIe0
- Outcome
- gas exchange and vegetative growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yuca”
e0“The frequency of irrigation 15 DWI increased the variables of gas exchange and vegetative growth.”
Claim · model-written summary
The authors attribute cassava drought tolerance to long-lived leaves, stomatal control, and high photosynthetic potential.
- Taxon
- yucaManihot esculentat0
- Outcome
- ability to tolerate complex conditionse0
- Qualifier
- long life leaf, stomatal control, and high photosynthetic potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yuca”
e0“This behavior is due to the ability to tolerate complex conditions through morphological and physiological mechanisms, among them, long life leaf, stomatal control, and high photosynthetic potential.”
The same questions in other papers
irrigation · physiology: gas exchange · Manihot esculenta (cassava)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
drought · yield · Manihot esculenta (cassava)Positive and negative results
13 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
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.