Data/hora: 04/06/2024 16:33:08

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	10/12/2021	
Data da última atualização: 	16/12/2021	
Autoria: 	AIRES, E. S.; ARAGÃO, C. A.; DANTAS, B. F.; RODRIGUES, J. D.; ONO, E. O.	
Afiliação: 	EDUARDO SANTANA AIRES; CARLOS ALBERTO ARAGÃO; BARBARA FRANCA DANTAS, CPATSA; JOÃO DOMINGOS RODRIGUES; ELIZABETH ORIKA ONO.	
Título: 	Light intensity modulates the accumulation of carbohydrates, antioxidant enzymes and production of iceberg lettuce under tropical conditions.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Horticulturae, v. 7, n. 12, 553, 2021.	
DOI: 	https://doi.org/10.3390/horticulturae7120553	
Idioma: 	Inglês	
Conteúdo: 	High solar radiation in tropical regions can affect the development, physiology, and biochemistry of plants. Our aim with this research was to evaluate the biochemical responses and production of iceberg lettuce cultivars under environments with different shadings. An experiment under field conditions was installed in a 4 × 4 factorial scheme. Four cultivars of iceberg lettuce (Great Lakes, Winslow, Delicia, and Balsamo) and four environments with different shadings (three types of shading screens: red, ChromatiNet®, and black; and treatment under the full sun) were evaluated. Forty-five days after transplanting, the plants were harvested, and the biomass was weighed to obtain the fresh consumable part (FCP) and the biochemical parameters: total soluble sugar (TSS), reducing sugar (RS), and the activity of SOD, CAT, and POD. We found that shading modulates biochemical and productive responses of iceberg lettuce, and the main microclimatic factor related to these responses was solar radiation. We observed a negative correlation between RS and FCP. The solar radiation between 16 and 18 MJ·m&#8722;2 ·day&#8722;1 , observed in the environments with a black screen and ChromatiNet®, promoted the highest activity of the SOD enzyme and average levels of TSS and RS, providing higher FCP of the cultivars Delícia and Balsamo in high temperatures period.	
Palavras-Chave: 	Alface americana; Aparafusamento.	
Thesagro: 	Açúcares; Alface; Fisiologia; Lactuca Sativa; Sombreamento.	
Thesaurus Nal: 	Lettuce.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (59713-1) - UPC - AP - DD -  -  -  - DIS