Abstract
Despite the negative impacts of increased ultraviolet radiation intensity on plants, these organisms continue to grow and produce under the increased environmental UV levels. We hypothesized that ambient UV intensity can generate acclimations in plant growth, leaf morphology, and photochemical functioning in modern genotypes of Coffea arabica and C. canephora. Coffee plants were cultivated for ca. six months in a mini greenhouse under either near ambient (UVam) or reduced (UVre) ultraviolet regimes. At the plant scale, C. canephora was substantially more impacted by UVam when compared to C. arabica, investing more carbon in all juvenile plant components than under UVre. When subjected to UVam, both species showed anatomic adjustments at the leaf scale, such as increases in stomatal density in C. canephora, at the abaxial and adaxial cuticles in both species, and abaxial epidermal thickening in C. arabica, although without apparent impact on the thickness of palisade and spongy parenchyma. Surprisingly, C. arabica showed more efficient energy dissipation mechanism under UVam than C. canephora. UVam promoted elevated protective carotenoid content and a greater use of energy through photochemistry in both species, as reflected in the photochemical quenching increases. This was associated with an altered chlorophyll a/b ratio (significantly only in C. arabica) that likely promoted a greater capability to light energy capture. Therefore, UV levels promoted different modifications between the two Coffea sp. regarding plant biomass production and leaf morphology, including a few photochemical differences between species, suggesting that modifications at plant and leaf scale acted as an acclimation response to actual UV intensity.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Ambient UV affected C. canephora biomass allocation more than C. arabica, with greater carbon investment than under reduced UV.
- Taxon
- C. canephora
Coffea canephorae0 - Treatment
- UVame0
- Outcome
- carbon in all juvenile plant componentse0
- Direction
- moree0
- Comparator
- UVree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. canephora was substantially more impacted by UVam when compared to C. arabica, investing more carbon in all juvenile plant components than under UVre.”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
Ambient UV increased stomatal density in C. canephora.
- Taxon
- C. canephoraCoffea canephorae0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- stomatal densitye0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases in stomatal density in C. canephora”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
Ambient UV increased abaxial and adaxial cuticles in C. arabica.
- Taxon
- Coffea arabica
Coffea arabicat0 - Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- abaxial and adaxial cuticlese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the abaxial and adaxial cuticles in both species”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
Ambient UV increased abaxial and adaxial cuticles in C. canephora.
- Taxon
- C. canephoraCoffea canephorat0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- abaxial and adaxial cuticlese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the abaxial and adaxial cuticles in both species”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
Ambient UV thickened the abaxial epidermis in C. arabica.
- Taxon
- C. arabicaCoffea arabicae0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- abaxial epidermal thickeninge0
- Direction
- thickeninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“abaxial epidermal thickening in C. arabica”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
Ambient UV had no apparent impact on palisade and spongy parenchyma thickness.
- Taxon
- Coffea arabicaCoffea arabicat0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- thickness of palisade and spongy parenchymae0
- Direction
- without apparent impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without apparent impact on the thickness of palisade and spongy parenchyma.”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
C. arabica showed more efficient energy dissipation under ambient UV than C. canephora.
- Taxon
- C. arabicaCoffea arabicae0
- Treatment
- UVame0
- Outcome
- energy dissipation mechanisme0
- Direction
- more efficiente0
- Comparator
- C. canephorae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. arabica showed more efficient energy dissipation mechanism under UVam than C. canephora.”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam elevated protective carotenoids in C. arabica.
- Taxon
- Coffea arabicaCoffea arabicat0
- Treatment
- UVame0
- Outcome
- protective carotenoid contente0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UVam promoted elevated protective carotenoid content and a greater use of energy through photochemistry in both species”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam elevated protective carotenoids in C. canephora.
- Taxon
- C. canephoraCoffea canephorat0
- Treatment
- UVame0
- Outcome
- protective carotenoid contente0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UVam promoted elevated protective carotenoid content and a greater use of energy through photochemistry in both species”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam increased photochemical quenching and energy use through photochemistry in C. arabica.
- Taxon
- Coffea arabicaCoffea arabicat0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- photochemical quenchinge0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a greater use of energy through photochemistry in both species, as reflected in the photochemical quenching increases.”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam increased photochemical quenching and energy use through photochemistry in C. canephora.
- Taxon
- C. canephoraCoffea canephorat0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- photochemical quenchinge0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a greater use of energy through photochemistry in both species, as reflected in the photochemical quenching increases.”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam altered chlorophyll a/b ratio significantly in C. arabica.
- Taxon
- C. arabicaCoffea arabicae0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- chlorophyll a/b ratioe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altered chlorophyll a/b ratio (significantly only in C. arabica)”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
Claim · model-written summary
UVam altered chlorophyll a/b ratio in C. canephora without reported significance.
- Taxon
- C. canephoraCoffea canephorat0
- Treatment
- Ultraviolet Solar Radiationt0
- Outcome
- chlorophyll a/b ratioe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altered chlorophyll a/b ratio (significantly only in C. arabica)”
t0“Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora”
The same questions in other papers
light · physiology: photosynthesis · Coffea canephora (robusta coffee)Positive and negative results
1 in the opposite direction
- negative
light · physiology: photosynthesis · Coffea arabica (arabica coffee)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 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.