Photosynthetica 2020, 58(3):682-691 | DOI: 10.32615/ps.2020.009

Ultrasonic seed treatment and Cu application modulate photosynthesis, grain quality, and Cu concentrations in aromatic rice

Z. MO1,2, Q. LIU1, W. XIE1, U. ASHRAF3, M. ABRAR5, S. PAN1,2, M. DUAN1,2, H. TIAN1,2, S. WANG1,2, X. TANG1,2
1 College of Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China
2 Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture, Guangzhou, 510642, Guangdong, China
3 Department of Botany, Division of Science and Technology, University of Education, Lahore, 54770, Punjab, Pakistan
5 State Key Laboratory of Grassland Agroecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China

The present study investigated the effects of ultrasonic seed treatment and Cu application on grain yield, photosynthesis, grain quality, and Cu contents of aromatic rice. The ultrasonic treated and nontreated seeds of two aromatic rice cultivars, i.e., Nongxiang 18 and Meixiangzhan 2, were sown in Cu-contaminated soil with 1.5 and 3.0 g(Cu) m-2 whereas the soil without Cu application was taken as control (CK). Ultrasonic seed treatment and Cu application increased grain yield by 2.7-33.5% in Nongxiang 18 and by 12.9-20.2% in Meixiangzhan 2 owing to substantial improvements in morphophysiological and yield-related traits. Both ultrasonic seed treatment and Cu application also improved the 2-acetyl-1-pyrroline contents as a result of increased proline contents and proline dehydrogenase activity. The Cu contents in plant parts were higher in Cu-containing soil than that of CK. Overall, ultrasonic seed treatment and optimum Cu application improved aromatic rice grain yield, dry biomass, aroma, and grain quality of aromatic rice.

Additional key words: 2-acetyl-1-pyrroline; antioxidant; copper; grain yield; growth; plant biomass.

Received: August 9, 2019; Revised: December 24, 2019; Accepted: January 22, 2020; Prepublished online: April 10, 2020; Published: June 11, 2020  Show citation

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MO, Z., LIU, Q., XIE, W., ASHRAF, U., ABRAR, M., PAN, S., ... TANG, X. (2020). Ultrasonic seed treatment and Cu application modulate photosynthesis, grain quality, and Cu concentrations in aromatic rice. Photosynthetica, 58(3), 682-691. doi: 10.32615/ps.2020.009
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