Data/hora: 26/09/2024 09:11:18

Biblioteca(s): 	Embrapa Algodão.	
Data corrente: 	03/01/2018	
Data da última atualização: 	03/01/2018	
Autoria: 	COSTA, J. C. F. da; SILVA, D. J. da; SOUTO, A. G. de L.; SOFIATTI, V.; ROSADO, L. D. S.; LIMA NETO, A. J. de; SANTOS, C. E. M. dos.	
Afiliação: 	JUSSARA CRISTINA FIRMINO da COSTA, UFV; DEMETRIUS JOSÉ da SILVA, UFPB; ANTÔNIO GUSTAVO de LUNA SOUTO, UFV; VALDINEI SOFIATTI, CNPA; LUCIANA DOMICIANO SILVA ROSADO, UFV; ANTONIO JOÃO de LIMA NETO, UFV; CARLOS EDUARDO MAGALHÃES dos SANTOS, UFV.	
Título: 	Physiological aspects in cotton cultivars in response to application leaf gibberellic acid.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	African Journal of Agricultural Research, v.12, n. 4, p. 270-278, Jan. 2017.	
ISSN: 	1991-637X	
DOI: 	10.5897/AJAR2016.11663	
Idioma: 	Inglês	
Conteúdo: 	The cotton plant is a species of the Malvaceae family and is relevant to the Brazilian and world economy, mainly because of the textile fiber. However, there was an increase in cotton production because it is necessary for the use of inputs or stimulants, such as the use of gibberellic acid, which has contributed in improving the physiological processes of plants. The study aimed to evaluate the effects of gibberellic acid doses and foliar application on the physiological aspects of different cotton cultivars. The experiment was conducted under field conditions in 5 × 3 factorial scheme, corresponding to five doses of gibberellic acid (0, 0.01, 0.02, 0.04 and 0.06 mg L-1) and three cultivars upland cotton (BRS 8H, BRS Rubi and BRS Safira) in the design of randomized blocks, three replications and 25 plants per plot. The photosynthetic pigments, which are represented by the contents of chlorophyll a and b, total, carotenoid and relative water content in the sheet were determined. In BRS 8H the chlorophyll levels were high, 287.914 ?mol m-2 to 468.796 ?mol m-2 being the treatments without and sprayed with 0.06 mg L-1 GA3, with 62.82% increase. The application of 0.06 mg L-1 GA3 generally promotes increased levels of photosynthetic pigments and relative water content in cotton leaves. The cotton BRS 8H was the culture that best meets the application of gibberellic acid.	
Palavras-Chave: 	Pigmentos fotossintéticos.	
Thesagro: 	Ácido giberélico; Algodão; Carotenóide; Clorofila; Gossypium hirsutum.	
Thesaurus Nal: 	Carotenoids; Chlorophyll; Cotton; Gibberellic acid; Pigments.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/170248/1/Physiological-aspects-....pdf	
Registro original: 	Embrapa Algodão (CNPA)	
Exemplares: 	CNPA - (28506-1) - UPC - AP - DD -  -  -  - DIS