Title:	Physiological aspects in cotton cultivars in response to application leaf gibberellic acid.
Authors:	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
Affiliation:	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.
Date Issued:	2017
Citation:	African Journal of Agricultural Research, v.12, n. 4, p. 270-278, Jan. 2017.
Description:	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.
Thesagro:	Algodão Gossypium hirsutum Ácido giberélico Clorofila Carotenóide
NAL Thesaurus:	Cotton Pigments Gibberellic acid Chlorophyll Carotenoids
Keywords:	Pigmentos fotossintéticos
ISSN:	1991-637X
DOI:	10.5897/AJAR2016.11663
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPA)