2004
DOI: 10.1590/s0006-87052004000300005
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Crescimento e partição de matéria seca e de carbono no mamoeiro em resposta à nutrição nitrogenada

Abstract: Avaliou-se o efeito da nutrição nitrogenada sobre a produção e partição de matéria seca e sobre alteração na concentração de alguns carboidratos solúveis, em mamoeiro da variedade 'Sunrise solo'. O delineamento experimental foi em blocos casualizados com três tratamentos (níveis de NO-3) e cinco repetições, sendo cada planta considerada uma parcela experimental. As plantas cresceram em diferentes soluções nutritivas, contendo três concentrações de NO-3 (1,0; 3,0; 5,0 mol m-3). Sessenta e quatro dias após a sem… Show more

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Cited by 12 publications
(14 citation statements)
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“…Since water is the main interference factor in plant physiological processes (Gouveia Neto, 2011), and its restriction triggers plant phenological development acceleration, DM and nutrient partitioning between the different plant organs is changed. Although developing grains act as strong photoassimilate sinks in the plant (Dantas Júnior et al, 2010;Soratto et al, 2013;Santos et al, 2015), in the season cultivation, where there was greater water availability (Figure 1), DM allocation to stem and leaf growth was high, even after flowering (Figure 2e, f, g, h), confirming reports that stress affects photoassimilate partitioning in plants (Thornley, 1972;Cruz et al, 2004).…”
Section: Resultssupporting
confidence: 82%
“…Since water is the main interference factor in plant physiological processes (Gouveia Neto, 2011), and its restriction triggers plant phenological development acceleration, DM and nutrient partitioning between the different plant organs is changed. Although developing grains act as strong photoassimilate sinks in the plant (Dantas Júnior et al, 2010;Soratto et al, 2013;Santos et al, 2015), in the season cultivation, where there was greater water availability (Figure 1), DM allocation to stem and leaf growth was high, even after flowering (Figure 2e, f, g, h), confirming reports that stress affects photoassimilate partitioning in plants (Thornley, 1972;Cruz et al, 2004).…”
Section: Resultssupporting
confidence: 82%
“…2 to 5) help to explain why this genotype had lower productivity (data not shown) as compared to the other genotypes but clearly other physiological traits should contribute to this problem. SLW represents leaf thickness and gives an estimative of the proportion between the assimilatory surface and the veins that sustain those leaf tissues (Evans, 1972, Cruz et al, 2004. Plants with a higher SLW are usually greener because they have more cell layers and chloroplasts/ chlorophyll, what could represent a higher photosynthetic potential.…”
Section: Discussionmentioning
confidence: 99%
“…To determine the shoot and root dry weight (SDW and RDW, respectively) at the end of the experiment (92 DAS), the plant organs (leaves, stem and roots) were oven-dried at ), leaf weight ratio (LWR, g leaf dry weight g -1 total plant dry weight), stem weight ratio (SWR, g stem dry weight g -1 total plant dry weight) and leaf area ratio (LAR, m 2 leaf area g -1 total plant dry weight) (Cruz et al, 2004). …”
mentioning
confidence: 99%
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“…Segundo CRUZ et al (2004), o nitrogênio tem efeitos sobre a assimilação de carbono, produção de biomassa e rendimento das culturas. Desta forma, plantas crescidas com quantidade inadequada de nitrogênio, como é o caso do tratamento em que o N é fornecido totalmente aos 20 DAS, não expressam totalmente seu potencial genético, pois, em tais condições, ocorre uma série de alterações morfológicas e fisiológicas, afetando, negativamente, o crescimento das plantas.…”
Section: Tabela 4 -Valores Médios Do Comprimento Da Haste Principal (unclassified