ArticleAnnals of botany2013
Cotton bracts are adapted to a microenvironment of concentrated CO2 produced by rapid fruit respiration.
Article in Annals of botany, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 22 citations in OpenAlex.
- Pod photosynthesis: a new frontier for developing stress-resilient and high-yielding crops.Plant & cell physiology · 2025Review
- Novel Insights into the Contribution of Cyclic Electron Flow to Cotton Bracts in Response to High Light.International journal of molecular sciences · 2023Article
- Carbon assimilation and distribution in cotton photosynthetic organs is a limiting factor affecting boll weight formation under drought.Frontiers in plant science · 2022Article
- Boll-leaf system gas exchange and its application in the analysis of cotton photosynthetic function.Photosynthesis research · 2021Article
- Plants make smart decisions in complex environments.Plant signaling & behavior · 2021Review
- Mesophyll conductance in cotton bracts: anatomically determined internal CO2 diffusion constraints on photosynthesis.Journal of experimental botany · 2018Article
- The effects of elevated COEcology and evolution · 2017Article
- Novel Insights into the Influence of Seed Sarcotesta Photosynthesis on Accumulation of Seed Dry Matter and Oil Content inFrontiers in plant science · 2017Article
- Whole-tissue determination of the rate coefficients of photoinactivation and repair of photosystem II in cotton leaf discs based on flash-induced P700 redox kinetics.Photosynthesis research · 2013Article
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Authors and funding
6 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsElucidation of the mechanisms by which plants adapt to elevated CO2 is needed; however, most studies of the mechanisms investigated the response of plants adapted to current atmospheric CO2. The rapid respiration rate of cotton (Gossypium hirsutum) fruits (bolls) produces a concentrated CO2 microenvironment around the bolls and bracts. It has been observed that the intercellular CO2 concentration of a whole fruit (bract and boll) ranges from 500 to 1300 µmol mol(-1) depending on the irradiance, even in ambient air. Arguably, this CO2 microenvironment has existed for at least 1·1 million years since the appearance of tetraploid cotton. Therefore, it was hypothesized that the mechanisms by which cotton bracts have adapted to elevated CO2 will indicate how plants will adapt to future increased atmospheric CO2 concentration. Specifically, it is hypothesized that with elevated CO2 the capacity to regenerate ribulose-1,5-bisphosphate (RuBP) will increase relative to RuBP carboxylation.
methodsTo test this hypothesis, the morphological and physiological traits of bracts and leaves of cotton were measured, including stomatal density, gas exchange and protein contents. KEY
resultsCompared with leaves, bracts showed significantly lower stomatal conductance which resulted in a significantly higher water use efficiency. Both gas exchange and protein content showed a significantly greater RuBP regeneration/RuBP carboxylation capacity ratio (Jmax/Vcmax) in bracts than in leaves.
conclusionsThese results agree with the theoretical prediction that adaptation of photosynthesis to elevated CO2 requires increased RuBP regeneration. Cotton bracts are readily available material for studying adaption to elevated CO2.
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