Data/hora: 05/06/2024 18:12:15

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Cucumber seedling dependence on cotyledonary leaves for early growth	
Autores: 	Bisognin,Dilson Antônio; Velasquez,Luis; Widders,Irvin.	
Data: 	2005-06-01	
Ano: 	2005	
Palavras-chave: 	Cucumis sativus; Cotyledon excision; Cotyledon coverage; Dry matter; Leaf area.	
Resumo: 	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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000600002	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2005000600002	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.40 n.6 2005	
Fonte: 	info:eu-repo/semantics/openAccess