Interactive effect of elevated CO2 and drought on physiological traits of Datura stramonium

Muhammad Mansoor Javaid; Singarayer Florentine; Athar Mahmood; Allah Wasaya; Talha Javed; Abdul Sattar; Naeem Sarwar; Hazem M Kalaji; Hafiz Bashir Ahmad; Jacek Worbel; Mohammed A A Ahmed; Arkadiusz Telesiński; Jacek Mojski

doi:10.3389/fpls.2022.929378

Interactive effect of elevated CO₂ and drought on physiological traits of Datura stramonium

Front Plant Sci. 2022 Oct 26:13:929378. doi: 10.3389/fpls.2022.929378. eCollection 2022.

Authors

Muhammad Mansoor Javaid¹, Singarayer Florentine², Athar Mahmood³, Allah Wasaya⁴, Talha Javed⁵, Abdul Sattar⁴, Naeem Sarwar⁶, Hazem M Kalaji^{7

8}, Hafiz Bashir Ahmad⁹, Jacek Worbel¹⁰, Mohammed A A Ahmed¹¹, Arkadiusz Telesiński¹⁰, Jacek Mojski^{12

13}

Affiliations

¹ Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha, Pakistan.
² Future Regions Research Centre, Federation University Australia, Mount Helen, VIC, Australia.
³ Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan.
⁴ College of Agriculture, BZU, Bahadur Sub Campus, Layyah, Pakistan.
⁵ College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China.
⁶ Department of Agronomy, Bahauddin Zakariya University, Multan, Pakistan.
⁷ Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences SGGW, Warsaw, Poland.
⁸ Institute of Technology and Life Sciences, National Research Institute, Raszyn, Poland.
⁹ Department of Forestry, College of Agriculture, University of Sargodha, Sargodha, Pakistan.
¹⁰ Department of Bioenegineering, West Pomerania, University of Technology Szczecin, Szczecin, Poland.
¹¹ Plant Production Department (Horticulture-Medicinal and Aromatic Plants), Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, Egypt.
¹² Twój Swiat Jacek Mojski, Lukow, Poland.
¹³ Fundacja Zielona Infrastruktura, Lukow, Poland.

Abstract

Rising atmospheric CO₂ concentrations are known to influence the response of many plants under drought. This paper aimed to measure the leaf gas exchange, water use efficiency, carboxylation efficiency, and photosystem II (PS II) activity of Datura stramonium under progressive drought conditions, along with ambient conditions of 400 ppm (aCO₂) and elevated conditions of 700 ppm (eCO₂). Plants of D. stramonium were grown at 400 ppm and 700 ppm under 100 and 60% field capacity in a laboratory growth chamber. For 10 days at two-day intervals, photosynthesis rate, stomatal conductance, transpiration rate, intercellular CO₂ concentration, water use efficiency, intrinsic water use efficiency, instantaneous carboxylation efficiency, PSII activity, electron transport rate, and photochemical quenching were measured. While drought stress had generally negative effects on the aforementioned physiological traits of D. stramonium, it was found that eCO₂ concentration mitigated the adverse effects of drought and most of the physiological parameters were sustained with increasing drought duration when compared to that with aCO₂. D. stramonium, which was grown under drought conditions, was re-watered on day 8 and indicated a partial recovery in all the parameters except maximum fluorescence, with this recovery being higher with eCO₂ compared to aCO₂. These results suggest that elevated CO₂ mitigates the adverse growth effects of drought, thereby enhancing the adaptive mechanism of this weed by improving its water use efficiency. It is concluded that this weed has the potential to take advantage of climate change by increasing its competitiveness with other plants in drought-prone areas, suggesting that it could expand into new localities.

Keywords: electron transport rate; fluorescence; gas exchange; photosystem II activity; water use efficiency.