Data/hora: 09/06/2024 13:43:14

Provedor de dados: 	Ciência Rural	
País: 	Brazil	
Título: 	Relationship between root exudation of organic carbon and physiological variables of irrigated rice cultivars	
Autores: 	Moscôso,Janielly Silva Costa; Silva,Leandro Souza da; Tarouco,Camila Peligrinotti; Nicoloso,Fernando Teixeira; Severo,Fabiane Figueiredo; Aita,Natália Tobin; Prigol,Luís Henrique Ferreira.	
Data: 	2018-01-01	
Ano: 	2018	
Palavras-chave: 	Oryza sativa; Photosynthesis; Exudates; Methanogenesis.	
Resumo: 	ABSTRACT:  Rhizospheric carbon resulting from root exudation is one of the substrates used by the soil microbiota, and reflects methane (CH4) emissions in anoxic environments such as irrigated rice cultivation. With the increase of the photosynthetic capacity of the plant in the reproductive period, there is greater accumulation of biomass which, in turn, increases the rate of root exudation. However, genotypic variations in the physiological aspects of rice plants may be related to the amount of root exudates. Ten cultivars of irrigated rice were evaluated for the exudation rate of total organic carbon (EXRToc), shoot dry matter (SDM), and physiological variables related to photosynthesis during the full flowering (blooming) period. Two experiments were conducted in the greenhouse of the Department of Soils of the UFSM (University of Santa Maria, Santa Maria, RS, Brazil) in a completely randomized experimental design. The cultivars presented significant differences in EXRToc, SDM, and all physiological variables as well as positive and significant correlations between EXRToc and physiological variables. Early cultivars were more inefficient in the physiological variables reflecting reduced values of EXRToc and SDM whereas medium-cycle cultivars were more efficient with larger EXRToc and SDM reflections.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001200250	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/0103-8478cr20180507	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.48 n.12 2018	
Fonte: 	info:eu-repo/semantics/openAccess