Journal article

Publication year: 2021

Pages: 524-534

Journal: Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology

Volume number: 155

Issue number: 3

ISSN: 1126-3504

eISSN: 1724-5575

DOI Link: https://doi.org/10.1080/11263504.2020.1762783

Publisher: Taylor and Francis Group

Abstract: 
Phragmites karka (Retz.) Trin. ex Steud. is a pan-tropical, wetland, grass, and this study restricted water availability to P. karka by either low matric potential (water deficit) or low osmotic potential (salinity). Growth, water relations, mineral nutrition, and photosynthesis were compared when plants were irrigated at control (100% water holding capacity WHC), 300 mM NaCl (salinity, at 100% WHC), or water deficit (40% WHC) conditions. Leaf water potential and plant growth decreased substantially under salinity and water deficit. This led to stomatal closure and a decrease in gas exchange with the risk of oxidative injury. Under saline conditions, stress was mitigated by an increased dissipation of absorbed light energy by non-photochemical quenching. Water deficit conditions led to higher PS II quantum yield efficiency. Shoot Na+ toxicity was reduced by 10-fold higher Na+ sequestration in salt-treated roots, and enhanced proline and soluble carbohydrate accumulation in the leaf, compared to the control. Inorganic and organic substances maintained a higher soil-to-plant water gradient in salt-stressed plants compared to drought-stressed plants. P. karka survived in both forms of restricted water via growth plasticity, regulated osmotic and ionic homeostasis, and efficient gas exchange and PSII photochemistry.

Harvard Citation style: Abideen, Z., Koyro, H., Huchzermeyer, B., Ahmed, M., Zulfiqar, F., Egan, T., et al. (2021) Phragmites karka plants adopt different strategies to regulate photosynthesis and ion flux in saline and water deficit conditions, Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 155(3), pp. 524-534. https://doi.org/10.1080/11263504.2020.1762783

APA Citation style: Abideen, Z., Koyro, H., Huchzermeyer, B., Ahmed, M., Zulfiqar, F., Egan, T., & Khan, M. (2021). Phragmites karka plants adopt different strategies to regulate photosynthesis and ion flux in saline and water deficit conditions. Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology. 155(3), 524-534. https://doi.org/10.1080/11263504.2020.1762783