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- Title
Influence of sub-lethal crude oil concentration on growth, water relations and photosynthetic capacity of maize ( Zea mays L.) plants.
- Authors
Athar, Habib-ur-Rehman; Ambreen, Sarah; Javed, Muhammad; Hina, Mehwish; Rasul, Sumaira; Zafar, Zafar; Manzoor, Hamid; Ogbaga, Chukwuma; Afzal, Muhammad; Al-Qurainy, Fahad; Ashraf, Muhammad
- Abstract
Maize tolerance potential to oil pollution was assessed by growing Zea mays in soil contaminated with varying levels of crude oil (0, 2.5 and 5.0 % v/ w basis). Crude oil contamination reduced soil microflora which may be beneficial to plant growth. It was observed that oil pollution caused a remarkable decrease in biomass, leaf water potential, turgor potential, photosynthetic pigments, quantum yield of photosystem II (PSII) (Fv/Fm), net CO assimilation rate, leaf nitrogen and total free amino acids. Gas exchange characteristics suggested that reduction in photosynthetic rate was mainly due to metabolic limitations. Fast chlorophyll a kinetic analysis suggested that crude oil damaged PSII donor and acceptor sides and downregulated electron transport as well as PSI end electron acceptors thereby resulting in lower PSII efficiency in converting harvested light energy into biochemical energy. However, maize plants tried to acclimate to moderate level of oil pollution by increasing root diameter and root length relative to its shoot biomass, to uptake more water and mineral nutrients.
- Subjects
CORN; OIL spills; AMINO acids; PLANT growth; PHOTOSYSTEMS; GAS exchange in plants; PHOTOSYNTHETIC rates
- Publication
Environmental Science & Pollution Research, 2016, Vol 23, Issue 18, p18320
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-016-6976-7