Data/hora: 03/06/2024 06:47:24

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	18/08/2005	
Data da última atualização: 	17/08/2018	
Autoria: 	BISOGNIN, D. A.; VELASQUEZ, L.; WIDDERS, I.	
Afiliação: 	Dilson Antônio Bisognin, Universidade Federal de Santa Maria - UFSM/Departamento de Fitotecnia; Luis Velasquez, Michigan State University/Departament of Plant Pathology; Irvin Widders, Michigan State University/Departament of Horticulture.	
Título: 	Cucumber seedling dependence on cotyledonary leaves for early growth.	
Ano de publicação: 	2005	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 40, n. 6, p. 531-539, jun. 2005	
Idioma: 	Inglês	
Notas: 	Título em português: Dependência das folhas cotiledonares para o crescimento inicial de pepino.	
Conteúdo: 	The objective of this work was to evaluate the dependence of cucumber (Cucumis sativus L.) seedlings on cotyledonary leaves for early growth and establishment. Sets of two uniform emerging seedlings were used to quantify the initial growth and dry matter accumulation, as well as the intensity and stage of cotyledon damage in seedling establishment and to determine cotyledon protein, amino acid and carbohydrate contributions to the growing seedling. Cucumber seedling establishment was found to be highly dependent on cotyledonary leaves. Root system establishment was highly dependent on the health of the aerial part. One cotyledon was enough to maintain aerial growth of seedlings after unfolding the first true leaf. Cucumber seedlings depended on both cotyledons to keep root system growth at least until leaf area was equivalent to cotyledon area. Covering one or both cotyledons of seedlings with one unfolded leaf increased carbohydrate content of uncovered cotyledon and leaves compared with control seedlings. Cucumber seedlings are highly dependent on cotyledonary leaves and aerial parts are less dependent than root system. Cotyledon damage at early stages of plant establishment would adversely impact crop yield by reducing plant density, an important yield component, or slowing down seedling growth and establishment.	
Palavras-Chave: 	cobertura de cotilédone; cotyledon coverage; cotyledon excision; dry matter; remoção de cotilédone.	
Thesagro: 	Área Foliar; Cucumis Sativus; Matéria Seca.	
Thesaurus Nal: 	leaf area.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/107786/1/Cucumber.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (32278-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS