Dataset Information

Elevated carbon dioxide offers promise for wheat adaptation to heat stress by adjusting carbohydrate metabolism.

ABSTRACT: Carbohydrate metabolism in plants is influenced by thermodynamics. The amount of carbon dioxide (CO₂) in the atmosphere is expected to rise in the future. As a result, understanding the effects of higher CO₂ on carbohydrate metabolism and heat stress tolerance is necessary for anticipating plant responses to global warming and elevated CO₂. In this study, five wheat cultivars were exposed to heat stress (40 °C) at the onset of anthesis for three continuous days. These cultivars were grown at two levels of CO₂ i.e. ambient CO₂ level (a[CO₂], 380 mmol L^-1) and elevated CO₂ level (e[CO₂], 780 mmol L^-1), to determine the interactive effect of elevated CO₂ and heat stress on carbohydrate metabolism and antioxidant enzyme activity in wheat. Heat stress reduced the photosynthetic rate (Pn) and grain yield in all five cultivars, but cultivars grown in e[CO₂] sustained Pn and grain yield in contrast to cultivars grown in a[CO₂]. Heat stress reduced the activity of ADP-glucose pyrophosphorylase, UDP-glucose pyrophosphorylase, invertases, Glutathione reductase (GR), Peroxidase (POX), and Superoxide dismutase (SOD) at a[CO₂] but increased at e[CO₂]. The concentration of sucrose, glucose, and fructose mainly increased in tolerant cultivars under heat stress at e[CO₂]. This study confirms the interaction between the heat stress and e[CO2] to mitigate the effect of heat stress on wheat and suggests to have in-depth knowledge and precise understanding of carbohydrate metabolism in heat stressed plants in order to prevent the negative effects of high temperatures on productivity and other physiological attributes.

Supplementary information

The online version contains supplementary material available at 10.1007/s12298-021-01080-5.

SUBMITTER: Ulfat A

PROVIDER: S-EPMC8526630 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Elevated carbon dioxide offers promise for wheat adaptation to heat stress by adjusting carbohydrate metabolism.

Ulfat Aneela A Mehmood Ansar A Ahmad Khawaja Shafique KS Ul-Allah Sami S

Physiology and molecular biology of plants : an international journal of functional plant biology 20211008 10

Carbohydrate metabolism in plants is influenced by thermodynamics. The amount of carbon dioxide (CO2) in the atmosphere is expected to rise in the future. As a result, understanding the effects of higher CO2 on carbohydrate metabolism and heat stress tolerance is necessary for anticipating plant responses to global warming and elevated CO2. In this study, five wheat cultivars were exposed to heat stress (40 °C) at the onset of anthesis for three continuous days. ...[more]

PMID: 34744370

Similar Datasets

Project description:Astronauts on board the International Space Station (ISS) must adapt to several environmental challenges including microgravity, elevated carbon dioxide (CO2), and isolation while performing highly controlled movements with complex equipment. Head down tilt bed rest (HDBR) is an analog used to study spaceflight factors including body unloading and headward fluid shifts. We recently reported how HDBR with elevated CO2 (HDBR+CO2) affects visuomotor adaptation. Here we expand upon this work and examine the effects of HDBR+CO2 on brain activity during visuomotor adaptation. Eleven participants (34 ± 8 years) completed six functional MRI (fMRI) sessions pre-, during, and post-HDBR+CO2. During fMRI, participants completed a visuomotor adaptation task, divided into baseline, early, late and de-adaptation. Additionally, we compare brain activity between this NASA campaign (30-day HDBR+CO2) and a different campaign with a separate set of participants (60-day HDBR with normal atmospheric CO2 levels, n = 8; 34.25 ± 7.9 years) to characterize the specific effects of CO2. Participants were included by convenience. During early adaptation across the HDBR+CO2 intervention, participants showed decreasing activation in temporal and subcortical brain regions, followed by post- HDBR+CO2 recovery. During late adaptation, participants showed increasing activation in the right fusiform gyrus and right caudate nucleus during HDBR+CO2; this activation normalized to baseline levels after bed rest. There were no correlations between brain changes and adaptation performance changes from pre- to post HDBR+CO2. Also, there were no statistically significant differences between the HDBR+CO2 group and the HDBR controls, suggesting that changes in brain activity were due primarily to bed rest rather than elevated CO2. Five HDBR+CO2 participants presented with optic disc edema, a sign of Spaceflight Associated Neuro-ocular Syndrome (SANS). An exploratory analysis of HDBR+CO2 participants with and without signs of SANS revealed no group differences in brain activity during any phase of the adaptation task. Overall, these findings have implications for spaceflight missions and training, as ISS missions require individuals to adapt to altered sensory inputs over long periods in space. Further, this is the first study to verify the HDBR and elevated CO2 effects on the neural correlates of visuomotor adaptation.

Dataset Information

Elevated carbon dioxide offers promise for wheat adaptation to heat stress by adjusting carbohydrate metabolism.

Supplementary information

Publications

Elevated carbon dioxide offers promise for wheat adaptation to heat stress by adjusting carbohydrate metabolism.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets