Abstract
Tropospheric ozone (O3) harms vegetation by reducing tree biomass and crop yield. Accurate risk assessment based on O3 uptake depends on quantifying the plant's capacity to cope with O3-generated reactive oxygen species (ROS) at the cellular level. Young leaves were shown to have better ability than mature leaves to deal with O3 exposure but the mechanisms behind remain unclear. The aim of this study was to assess the crosstalk between O3 response and leaf development. Time-course response to O3 concentrations (0, 80 and 100 ppb) was studied at transcriptome and cellular level in a growing leaf (GL) and an expanded leaf (EL) of young poplar trees. The emergence of hypersensitive response-like lesions and the loss of chlorophyll content induced by O3 was less pronounced in GL than EL showing a higher tolerance of GL to O3. The leaf transcriptome response to O3 involved many genes (15,784) mainly involved in leaf development resulting in a stress-induced acceleration of leaf aging and senescence. In addition to detoxification mechanisms, O3 tolerance at early stages of leaf development might result from an insensitivity to senescence induction though further validation is needed. Understanding this process could offer new perspectives for O3 tolerance improvement or assessment.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 5
Claim · model-written summary
Ozone induced fewer hypersensitive response-like lesions in growing leaves than expanded leaves.
- Organ / stage
- GLe0
- Treatment
- O3e0
- Outcome
- hypersensitive response-like lesionse0
- Direction
- less pronouncede0
- Comparator
- ELe0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The emergence of hypersensitive response-like lesions and the loss of chlorophyll content induced by O3 was less pronounced in GL than EL”
t0“hybrid poplar”
Claim · model-written summary
Ozone induced less chlorophyll loss in growing leaves than expanded leaves.
- Organ / stage
- GLe0
- Treatment
- O3e0
- Outcome
- loss of chlorophyll contente0
- Direction
- less pronouncede0
- Comparator
- ELe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The emergence of hypersensitive response-like lesions and the loss of chlorophyll content induced by O3 was less pronounced in GL than EL”
t0“hybrid poplar”
Claim · model-written summary
The leaf transcriptome response to ozone involved 15,784 genes, mainly involved in leaf development.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf transcriptome response to O3 involved many genes (15,784) mainly involved in leaf development”
t0“hybrid poplar”
Claim · model-written summary
Ozone response accelerated leaf aging and senescence.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in a stress-induced acceleration of leaf aging and senescence”
t0“hybrid poplar”
Claim · model-written summary
Early leaf ozone tolerance might reflect insensitivity to senescence induction, pending validation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3 tolerance at early stages of leaf development might result from an insensitivity to senescence induction though further validation is needed”
t0“hybrid poplar”
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See all 7 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.