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Open AccessArticle

Exogenous p-Coumaric Acid Improves Salvia hispanica L. Seedling Shoot Growth

1
Plant Omics Laboratory, Department of Biotechnology, University of the Western Cape, Bellville 7535, South Africa
2
Environmental Biotechnology Laboratory, Department of Biotechnology, University of the Western Cape, Bellville 7535, South Africa
3
DST-NRF Centre of Excellence in Food Security, University of the Western Cape, Bellville 7530, South Africa
*
Authors to whom correspondence should be addressed.
Plants 2019, 8(12), 546; https://doi.org/10.3390/plants8120546
Received: 8 October 2019 / Revised: 4 November 2019 / Accepted: 4 November 2019 / Published: 26 November 2019
(This article belongs to the Section Plant Physiology and Metabolism)
p-Coumaric acid (p-CA) belongs to a family of natural esters of hydroxycinnamic acid compounds that have been shown to modulate plant growth and metabolism. In this study, we investigated the effect of exogenous p-CA on plant growth, reactive oxygen species (ROS)-induced oxidative damage, photosynthetic metabolism, osmolyte content and changes in superoxide dismutase (SOD) enzymatic activity. Exogenous p-CA improved Salvia hispanica (chia) growth by significantly enhancing shoot length, fresh and dry weights coupled with augmented levels of total chlorophyll and carotenoid contents. Furthermore, p-CA also triggered an induction in proline, glycine betaine (GB) and superoxide (O2) levels while no changes were observed for hydrogen peroxide (H2O2) and downstream malondialdehyde (MDA) content. Also, no change in SOD activity was observed in the p-CA treatment relative to the control. Therefore, the results suggest that exogenous p-CA improves chia seedling growth possibly via activation of a ROS-signalling pathway involving O2 under the control of proline accumulation. View Full-Text
Keywords: chia; chlorophyll content; p-coumaric acid; osmoprotectants; oxidative stress; proline; superoxide dismutase chia; chlorophyll content; p-coumaric acid; osmoprotectants; oxidative stress; proline; superoxide dismutase
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MDPI and ACS Style

Nkomo, M.; Gokul, A.; Keyster, M.; Klein, A. Exogenous p-Coumaric Acid Improves Salvia hispanica L. Seedling Shoot Growth. Plants 2019, 8, 546.

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