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Chemical Control and Morphoanatomical Analysis of Leaves of Different Populations of Sourgrass Planta Daninha
GOMES,L.J.P.; SANTOS,J.I.; GASPARINO,E.C.; CORREIA,N.M..
ABSTRACT Digitaria insularis has been selected by frequent glyphosate applications both in no-till areas and in fruit orchards. The objective of this paper was to evaluate control efficacy of D. insularis populations by glyphosate, alone and mixed with quizalofop-p-tefuryl, as well as classify them for herbicide sensitivity as susceptible, moderately susceptible and tolerant. This study also aimed to evaluate the relations between herbicide sensitivity and morphoanatomic features of leaf tissues. For chemical control, the experiment was conducted in a completely randomized design, with a 12 x 4 factorial arrangement with four replications. Twelve populations of D. insularis were treated with glyphosate alone at two concentrations (1.44 and 2.16 kg a.e....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis; Glyphosate; Tolerance; Genetic variability.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100202
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Growth of Vernonia ferruginea Seedlings Submitted to Thermal Stress Planta Daninha
AMARAL,C.L.; SANTOS,J.I.; PORTUGAL,C.R.S.; BRAGA,A.F.; ALVES,P.L.C.A..
ABSTRACT: Stress caused by extreme temperatures is one of the main elements that limit the geographical distribution and the seasonal growth of several plants, causing a severe delay in their development, reducing the photosynthetic rate and signaling the synthesis of defense compounds. Considering the current environmental changes and the damages that these changes can cause in plant physiology and growth, the objective of this work was to understand the interactions between temperature, physiology and growth, and to characterize the impact of temperature changes on the initial development of Vernonia ferruginea Less. Seedlings of this species were conditioned in germination chambers at previously adjusted constant temperatures (10, 20, 25, 30, and 35 oC)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass allocation; Leaf area; Gas exchanges.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100236
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