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Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment

The cultivation of spinach (Spinacia oleracea L.) has been increasing during the last years in controlled environment agriculture, where light represents a key factor for controlling plant growth and development and the highest energetic costs. The aim of the experiment was to evaluate the plant’s r...

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Autores principales: Proietti, Simona, Paradiso, Roberta, Moscatello, Stefano, Saccardo, Francesco, Battistelli, Alberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9962497/
https://www.ncbi.nlm.nih.gov/pubmed/36840153
http://dx.doi.org/10.3390/plants12040804
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author Proietti, Simona
Paradiso, Roberta
Moscatello, Stefano
Saccardo, Francesco
Battistelli, Alberto
author_facet Proietti, Simona
Paradiso, Roberta
Moscatello, Stefano
Saccardo, Francesco
Battistelli, Alberto
author_sort Proietti, Simona
collection PubMed
description The cultivation of spinach (Spinacia oleracea L.) has been increasing during the last years in controlled environment agriculture, where light represents a key factor for controlling plant growth and development and the highest energetic costs. The aim of the experiment was to evaluate the plant’s response to two light intensities, corresponding to an optimal and a reduced level, in terms of the photosynthetic process, photoassimilates partitioning, and the biosynthesis of sucrose and starch. Plants of spinach cv. ‘Gigante d’Inverno’ were grown in a phytotron under controlled conditions, comparing two values of photosynthetic photon flux density (PPFD), 800 μmol m(−2) s(−1) (800 PPFD) and 200 μmol m(−2) s(−1) (200 PPFD), at a 10 h light/14 h dark regime. Compared to 800 PPFD, under 200 PPFD, plants showed a reduction in biomass accumulation and a redirection of photoassimilates to leaves, determining a leaf expansion to optimize the light interception, without changes in the photosynthetic process. A shift in carbon partitioning favouring the synthesis of starch, causing an increase in the starch/sucrose ratio at the end of light period, occurred in low-light leaves. The activity of enzymes cFBAse, SPS, and AGPase, involved in the synthesis of sucrose and starch in leaves, decreased under lower light intensity, explaining the rate of accumulation of photoassimilates.
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spelling pubmed-99624972023-02-26 Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment Proietti, Simona Paradiso, Roberta Moscatello, Stefano Saccardo, Francesco Battistelli, Alberto Plants (Basel) Article The cultivation of spinach (Spinacia oleracea L.) has been increasing during the last years in controlled environment agriculture, where light represents a key factor for controlling plant growth and development and the highest energetic costs. The aim of the experiment was to evaluate the plant’s response to two light intensities, corresponding to an optimal and a reduced level, in terms of the photosynthetic process, photoassimilates partitioning, and the biosynthesis of sucrose and starch. Plants of spinach cv. ‘Gigante d’Inverno’ were grown in a phytotron under controlled conditions, comparing two values of photosynthetic photon flux density (PPFD), 800 μmol m(−2) s(−1) (800 PPFD) and 200 μmol m(−2) s(−1) (200 PPFD), at a 10 h light/14 h dark regime. Compared to 800 PPFD, under 200 PPFD, plants showed a reduction in biomass accumulation and a redirection of photoassimilates to leaves, determining a leaf expansion to optimize the light interception, without changes in the photosynthetic process. A shift in carbon partitioning favouring the synthesis of starch, causing an increase in the starch/sucrose ratio at the end of light period, occurred in low-light leaves. The activity of enzymes cFBAse, SPS, and AGPase, involved in the synthesis of sucrose and starch in leaves, decreased under lower light intensity, explaining the rate of accumulation of photoassimilates. MDPI 2023-02-10 /pmc/articles/PMC9962497/ /pubmed/36840153 http://dx.doi.org/10.3390/plants12040804 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Proietti, Simona
Paradiso, Roberta
Moscatello, Stefano
Saccardo, Francesco
Battistelli, Alberto
Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title_full Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title_fullStr Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title_full_unstemmed Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title_short Light Intensity Affects the Assimilation Rate and Carbohydrates Partitioning in Spinach Grown in a Controlled Environment
title_sort light intensity affects the assimilation rate and carbohydrates partitioning in spinach grown in a controlled environment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9962497/
https://www.ncbi.nlm.nih.gov/pubmed/36840153
http://dx.doi.org/10.3390/plants12040804
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