Abstract
Jatropha curcas (physic nut) is a plant with economic and pharmaceutical uses. Basic studies on the influence of environmental factors on the early development of J. curcas are important for improving farming techniques and increasing productivity. This study investigated the adjustments of J. curcas to the environmental factors of drought and light stress in order to determine which factors most strongly affect the allocation of biomass during early growth. Leaves, stems, and roots of young plants were sampled and leaf area was measured during January and June in 2011. Plants of J. curcas that were grown in shade and subjected to water stress showed higher biomass allocation to aerial parts (mainly stems), which can be explained as a strategy for maximizing carbon assimilation. The pattern of biomass allocation between aerial components and the root system changed in plants grown in shade. During June 2011, biomass in shade-grown J. curcas was preferentially allocated to stems, indicating long-term adjustment. The lower biomass allocation to the root system suggests reduced exploitation of soil water even when this resource is scarce. Thus, over the long term, growth of J. curcas may be compromised by the combined effects of light stress and water deficit.
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Claims 6
Claim · model-written summary
Shade and water stress increased allocation of J. curcas biomass to aerial parts, mainly stems.
- Taxon
- J. curcas
_tree_at_Samedha.jpg?width=60)
Jatropha curcase0 - Treatment
- grown in shade and subjected to water stresse0
- Outcome
- biomass allocation to aerial parts (mainly stems)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“Plants of J. curcas that were grown in shade and subjected to water stress showed higher biomass allocation to aerial parts (mainly stems), which can be explained as a strategy for maximizing carbon assimilation.”
Claim · model-written summary
The authors explain higher aerial allocation as a strategy to maximize carbon assimilation.
- Taxon
- J. curcasJatropha curcase0
- Outcome
- higher biomass allocation to aerial partse0
- Qualifier
- strategy for maximizing carbon assimilatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants of J. curcas that were grown in shade and subjected to water stress showed higher biomass allocation to aerial parts (mainly stems), which can be explained as a strategy for maximizing carbon assimilation.”
Claim · model-written summary
Shade changed J. curcas allocation between aerial components and roots.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- shadee0
- Outcome
- pattern of biomass allocation between aerial components and the root systeme0
- Direction
- changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The pattern of biomass allocation between aerial components and the root system changed in plants grown in shade.”
Claim · model-written summary
In June 2011, shaded J. curcas allocated biomass preferentially to stems.
- Taxon
- J. curcasJatropha curcase0
- Organ / stage
- stemse0
- Treatment
- shade-growne0
- Outcome
- biomasse0
- Direction
- preferentially allocatede0
- Qualifier
- During June 2011e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During June 2011, biomass in shade-grown J. curcas was preferentially allocated to stems, indicating long-term adjustment.”
Claim · model-written summary
Lower root biomass allocation suggests reduced soil water exploitation.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Organ / stage
- root systeme0
- Outcome
- reduced exploitation of soil watere0
- Qualifier
- even when this resource is scarcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The lower biomass allocation to the root system suggests reduced exploitation of soil water even when this resource is scarce.”
Claim · model-written summary
The authors infer that combined light stress and water deficit may compromise long-term J. curcas growth.
- Taxon
- J. curcasJatropha curcase0
- Treatment
- combined effects of light stress and water deficite0
- Outcome
- growth of J. curcas may be compromisede0
- Qualifier
- over the long terme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, over the long term, growth of J. curcas may be compromised by the combined effects of light stress and water deficit.”
The same questions in other papers
shade · growth · Jatropha curcasPositive and negative results
1 in the opposite direction
- negative
drought · growth · Jatropha curcasPositive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
5 papers more in this group
See all 9 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.