Data/hora: 01/07/2024 11:57:30

Biblioteca(s): 	Epagri-Sede.	
Tipo da produção científica: 	Resumo em Anais de Congresso	
Data corrente: 	12/03/2020	
Data da última atualização: 	12/03/2020	
Autoria: 	PUTTI, G. L.; RAGEAU, R.; BONHOMME, M.; LEITE, G. B.; SABBADINI, C.; PETEL, G.	
Título: 	Study of the growth capacity of the strawberry plant by microcalorimetric approach.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	In: INTERNATIONAL SYMPOSIUM ON PLANT DORMANCY , 3., 2004, Wageningen. Abstracts... Wageningen: Wageningen University, 2004. p. 62	
Idioma: 	Inglês	
Conteúdo: 	Improvement and rational management of the strawberry plant production require
knowledge of their physiological state, during the production stages and particularly of
their growth capacity. How environmental factors influence the evolution of the
physiological state of the plants is not satisfactory documented; moreover the relevance
of methods of characterization of this state, less heavy than the classic ones is yet to be
tested. A candidate method is microcalorimetric measurement. The physiological
activity of plant tissues can be assessed through the respiration intensity (for example
the emitted CO2 flux - RCO2) and the flux (Q) of the emitted metabolic heat. Combining
these two parameters can characterize the growth efficiency (part of the energy provided
by respiration dedicated to growth). Microcalorimetry permits the quick measurement
of these fluxes, on small quantities of material. However a methodological point is yet
to be studied; the influence on the recorded parameters of the temperature conditions
during the hours or days preceding measurement (acclimatization). We undertook to
validate the approach of the dynamics of the plant state by the microcalorimetric
method an trayplants cv Gariguette (comparing natural conditions and short cold
treatments - 1 month under 2 ºC). The analyzed organs were mainly the buds, but data
were collected on petioles and roots as well. The microcalorimetric data (recorded
without acclimatization or after 48 and 72 hours 20 ºC acclimatization) were compared
to the data given by the classical approaches of the plant state; biological ?petioles?
growth test and refractometric index measurement on roots. The 2002 data showed that
the microcalorimetric values depended much on the temperatures that the plant
experienced during the few days before measurement; accordingly, standard
conditioning of the plants must come before measurement. The data also showed that
the Q and RCO2 values could be relevant for characterizing the dormancy dynamics. A
replication of the experiment should confirm these results.	
Palavras-Chave: 	atividade respiratória; Dormência; morango; muda.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_11823.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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