The allelochemical trans-cinnamic acid stimulates salicylic acid production and galactose pathway in maize leaves: A potential mechanism of stress tolerance.

Plant Physiology and Biochemistry : PPB
Fabrizio AranitiMaria Rosa Abenavoli

Abstract

In this study, the effects (5 days) of the secondary metabolite trans-cinnamic acid on maize leaves (Zea mays L.), through a physiological and an untargeted metabolomic approach, were evaluated. A reduction in leaf growth and development accompanied by a decrease in protein content was observed in treated seedlings. Besides, trans-cinnamic acid stimulated the photosynthetic machinery with a significant increment in pigment content (chlorophyll a, b and carotenoids), a stimulation of the light adapted PSII efficiency (ɸII) as well as the chlorophyll a fluorescence (YNO), the apparent electron transport rate, and the regulated dissipation of the energy (YNPQ). By contrast, the dark adapted PSII parameter (Fv/Fm) was not affected suggesting that no physical damages to the antenna complex were caused by trans-cinnamic acid. These results suggested that maize seedlings were experiencing a stress but, at the same time, were able to cope with it. This hypothesis was confirmed by both the increment in benzoic and salicylic acids, important molecules involved in stress response, and the metabolomic results, which pointed out that the seedlings are directing their metabolism towards galactose production modulating its pathway, which is p...Continue Reading

Citations

Jan 8, 2021·Frontiers in Plant Science·Adela M Sánchez-MoreirasFabrizio Araniti
Mar 7, 2020·Plant Physiology and Biochemistry : PPB·Khursheda ParvinMasayuki Fujita
Feb 22, 2021·Functional & Integrative Genomics·Xiaoyu LuSongling Fu
Jul 3, 2021·International Journal of Molecular Sciences·Marta Jańczak-PieniążekMaciej Balawejder

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