GABA and Proline Metabolism in Response to Stress

Signorelli, Santiago; Tarkowski, Łukasz Paweł; O’Leary, Brendan; Rosa, Sofía Tabares-da; Borsani, Omar; Monza, Jorge

doi:10.1007/978-3-030-77477-6_12

Cited by 8 publications

(2 citation statements)

References 144 publications

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“…This reaction is catalyzed by pyrroline-5-carboxylate synthase (P5CS), which, in the rst step of the reaction, provides ATP to produce the intermediate glutamyl γ-phosphate and consumes NADPH in the second step. In most plant species, two isoforms of P5CS (P5CSA and P5CSB), which are induced under light stress conditions and whose synthesis increases, have been identi ed [37]. Similarly, it was shown that Pro accumulation increases under long photoperiods because light stress mediated by ELONGATED HYPOCOTYL 5 (HY5) can be the cause of the binding of this transcription factor (HY5) to C and A-box elements related to the P5CS1 promoter region [38].…”

Section: Discussionmentioning

confidence: 99%

Variations in Photoperiods and Their Impact on Yield, Photosynthesis and Secondary Metabolite Production in Basil Microgreens

Fayezizadeh,

Ansari,

Sourestani

et al. 2024

Preprint

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Background The effects of different photoperiods on plant phytochemical synthesis can be improved by adjusting the daily light integral (DLI). Changes in the internal rhythm of the plant and the synthesis and performance of secondary metabolites are largely dependent on environmental factors that control growth, one of the most significant of which is photoperiod. Information about the appropriate standard in terms of photoperiod for growing basil microgreens as one of the most important medicinal plants is limited. In this study, the effects of five different photoperiods, 6 (6 hours × 3 cycles), 8 (8 hours × 2 cycles), 16, 18, and 24 h day− 1 on the yield, photosynthesis and synthesis of secondary metabolites of three cultivars and one genotype of basil microgreens were evaluated. The purpose of this research was to determine the feasibility of using permanent light in growing basil microgreens and to create the best balance between beneficial secondary metabolites and performance. Results The results showed that the effects of photoperiod and cultivar on all investigated traits and their interaction on photosynthetic pigments, antioxidant capacity, total phenolic compounds, proline content and net photosynthesis rate were significantly different at the 1% level. The highest levels of vitamin C, flavonoids, anthocyanins, yield and antioxidant potential composite index (APCI) were obtained under the 24-h photoperiod. The highest antioxidant capacity was obtained for the Kapoor cultivar, and the highest total phenolic compound and proline contents were measured for the Ablagh genotype under a 24-h photoperiod. The highest yield (4.36 kg m− 2) and APCI (70.44) were obtained for the Ablagh genotype. The highest nitrate content was obtained with a photoperiod of 18 h for the Kapoor cultivar. The highest net photosynthesis rate was related to the Violeto cultivar under a 24-hour photoperiod (7.89 µmol Co2 m− 2 s− 1). Antioxidant capacity and flavonoids had a positive correlation with phenolic compounds and vitamin C. Yield had a positive correlation with antioxidant capacity, flavonoids, vitamin C, APCI, and proline. Conclusions Under continuous light conditions, basil microgreens resistance to light stress by increasing the synthesis of secondary metabolites and the increase of these biochemical compounds made basil microgreens increase their performance along with the increase of these health-promoting compounds. The best balance between antioxidant compounds and performance was achieved in continuous red + blue light. Based on these results, the use of continuous artificial LED lighting, due to the increase in plant biochemical with antioxidant properties and yield, can be a suitable strategy for growing basil microgreens in floating systems.

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Section: Discussionmentioning

confidence: 99%

Variations in Photoperiods and Their Impact on Yield, Photosynthesis and Secondary Metabolite Production in Basil Microgreens

Fayezizadeh,

Ansari,

Sourestani

et al. 2024

Preprint

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“…Existen también otros isómeros como el ácido α-aminobutírico (AABA), también conocido como homoalanina, y el ácido β-aminobutírico (BABA) que también tienen un papel fisiológico en animales (AABA), mientras que el BABA es una molécula natural en las plantas (Oketch-Rabah eet al, 2021). El GABA se encuentra naturalmente en pequeñas concentraciones en muchas frutas y hortalizas, y se acumula bajo varias condiciones de estrés abiótico jugando un papel fisiológico como equilibrio redox, osmoprotección, ajuste osmótico y funciones antioxidantes, entre otras (Signorelli et al, 2021).…”

Section: áCido Y-aminobutírico (Gaba)unclassified

Avances en maduración y poscosecha de frutas y hortalizas

2023

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SESIÓN 1. Satisfaciendo las necesidades del consumidor: productos hortofrutícolas más saludables, seguros y apetecibles. SESIÓN 2: Aspectos fisiológicos de la maduración y su implicación en postcosecha. SESIÓN 3: Estrategias para reducir las pérdidas postcosecha por alteraciones fisiológicas, patológicas y daños mecánicos. SESIÓN 4: Nuevas tecnologías postcosecha. Sostenibilidad y economía circular. SESIÓN 5: Los daños por frío: un problema aún por resolver.

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