Photosynthesis rate, chlorophyll content and initial development of physic nut without micronutrient fertilization

Santos, Emanuel; Zanchim, Bruno José; Campos, Aline Grella de; Garrone, Raphael Florencio; Lavres, José

doi:10.1590/s0100-06832013000500022

Cited by 30 publications

(23 citation statements)

References 28 publications

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“…Regarding the physiological traits, this has been widely reported photosynthetic responses to nutrient supply (Warren 2004, Wang et al 2009, Tavallali 2017. It is known that micronutrients act in the process of photosynthesis in different ways, in synthesis: participating in the metabolism of carbohydrates (B), fixing carbon and forming enzymes (Fe and Mn), integrating the electron transport chain (Cu) and acting as an activator of photosynthetic enzymes of the oxidase class (Zn) (Cakmak and Römheld 1997, Santos et al 2013b. In this sense, the photosynthetic activity of the plants evaluated in R2 presented the best total chlorophyll index and WUE, especially when the soil was fertilized with good availability of micronutrients ( Table 5).…”

Section: Discussionmentioning

confidence: 99%

Nutritional and morphophysiological responses of soybean to micronutrient fertilization in soil

Silva¹,

Rodrigues²,

Fidélis³

et al. 2019

Commun. Plant Sci.

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Micronutrient fertilization is essential to meet the nutritional deficiency of plants, providing the full development of crops. The aim of this work was to evaluate the effects of fertilization with micronutrients applied in the soil on the nutrition and morphology of soybean plants. The experimental design was completely randomized, with four replications. The treatments consisted of fertilization with micronutrients applied to soil to reach three levels of availability of B: low (<0.15 mg dm-3-control), good (0.61 mg dm-3) and high (> 0.90 mg dm-3). For this, the following values were applied: 0.00 (control), 56.67 and 211.11 kg ha-1 of the fertilizer containing 1.8% B, 0.85% Cu, 2% Mn and 9% Zn. Fertilization with the good and high treatments did not affect the uptake of B, but increased the Cu and Mn content, and reduced the Zn content in the plants. Higher plants with greater leaf expansion were observed in the high treatment, however, this did not influence the soybean grain yield. In the control, the physiological activity revealed smaller A, whereas gs and Ci were more effective; reverse effect was observed with high treatment. Fertilization with micronutrients in the soil affects the nutritional status and the photosynthetic activity of the plants due to the imbalance in the concentrations of B, Cu, Mn and Zn supplied with the fertilizer, reflecting in the absence of gains in the production of soybean grains. Highlighted Conclusions 1. Fertilization with micronutrients in the soil using as criterion the reach of three levels of availability of B does not increase the production of biomass and grains, despite ensuring foliar contents of B (Ȳ= 40.40) and Cu (Ȳ= 23.06) suitable for soybean cultivation in the Cerrado. 2. The inequity in the concentrations of B, Cu, Mn and Zn supplied with fertilizer affects the physiological performance of soybean plants.

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Section: Discussionmentioning

confidence: 99%

Nutritional and morphophysiological responses of soybean to micronutrient fertilization in soil

Silva¹,

Rodrigues²,

Fidélis³

et al. 2019

Commun. Plant Sci.

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“…Há também a premência de se avaliar as quantidades e proporções adequadas dos nutrientes mais extraídos na fase de estabelecimento destas plantas, associando-se a outros métodos complementares de diagnose foliar (RAJAONA; BRUECK; ASCH, 2013;SANTOS et al, 2013).…”

Section: Introductionunclassified

Biomass yield, macronutrient diagnosis, and nitrogen and calcium uptake during early growth of physic nut

Garrone

Campos

Silveira

et al. 2016

Revista Ciência Agronômica

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* RESUMO -As maiores exigências em nitrogênio (N) e cálcio (Ca) têm sido relatadas para as espécies da família Euforbiaceae. Objetivou-se avaliar o suprimento combinado de doses de N e Ca e seu efeito na avaliação do estado nutricional da Jatropha curcas, por meio das diagnoses visual, foliar e bioquímica (redutase do nitrato RNO 3 -e o teor de clorofila), além de determinar o rendimento de biomassa e os acúmulos de N e Ca durante o crescimento inicial das plantas. Foram utilizadas as doses 2; 9; 16; 23 e 30 mmol L -1 de N e 0,5; 1,75; 3,0; 4,25 e 5,5 mmol L -1 de Ca na solução nutritiva. As concentrações de N, Ca e K, nas folhas utilizadas para diagnose, foram alteradas pelas combinações de doses de N e Ca, enquanto que as concentrações de Mg foram alteradas somente pelas doses de Ca. O aumento das concentrações de N e Ca na solução resultou em incrementos na área foliar e na produção de biomassa de folhas em 400% e 245%, respectivamente. Em média, as quantidades de N e Ca acumuladas nas folhas corresponderam a 29% e 39% do total acumulado nas plantas. O rendimento de biomassa guarda relação direta com a atividade da RNO 3 -e teor de clorofila, sendo a faixa de concentração de N nestas folhas de 43 a 45 g kg -1 para a máxima produção. O nitrogênio promove maior impacto no rendimento de biomassa das plantas, todavia, os efeitos são mais expressivos com o aumento da absorção de Ca.Palavras-chave: Área foliar. Diagnose foliar. Jatropha curcas. Redutase do nitrato.ABSTRACT -Higher nitrogen (N) and calcium (Ca) requirements than other macronutrients in Euphorbiaceous species have been pointed out in the literature. Thus, the objective of this work was evaluate the effects of N and Ca combination rates on the visual deficiencies of both nutrients, on the macronutrient status, chlorophyll content and nitrate reductase activity (RNO 3 -) taken on the recent expanded leaves of Jatropha curcas, as well as to evaluate N and Ca uptake and biomass yield during early plant growth, subjected to 2; 9; 16; 23 e 30 mmol L -1 N rates and 0.5; 1.75; 3.0; 4.25 e 5.5 mmol L -1 Ca rates, in the nutrient solution. Nitrogen, Ca and K concentrations on the recent expanded leaves were changed by N and Ca rates, whereas leaf-Mg concentrations ranged only by Ca supply. Increasing N and Ca rates in solution led to increased leaf area and the leaf biomass yield by 400% and 245%, respectively. On average, N and Ca taken up on leaves accounted for 29% and 39% of the plant uptake. Biomass yield is directly related to RNO 3 -activity and chlorophyll content, and the range of N concentration in these leaves related to highest plant dry matter production is 43-45 g kg -1. In conclusion, N supply causes greater impact on the plant biomass yield; however, the effects are more relevant with increased Ca uptake.

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“…Este desequilíbrio pode afetar indiretamente a fotossíntese e a transpiração através da redução da área foliar e pela alteração de compostos (pigmentos) fotossintéticos presentes nas folhas (SANTOS et al, 2013). Outra possibilidade, descrita por Goldbach et al (2007) HUANG et al, 1992;MARSCHNER, 2012).…”

Section: Borounclassified

Interação cálcio e boro na fixação biológica de nitrogênio na soja: avaliação morfológica, ultraestrutural e da atividade da nitrogenase

Garrone¹

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Photosynthesis rate, chlorophyll content and initial development of physic nut without micronutrient fertilization

Cited by 30 publications

References 28 publications

Nutritional and morphophysiological responses of soybean to micronutrient fertilization in soil

Nutritional and morphophysiological responses of soybean to micronutrient fertilization in soil

Biomass yield, macronutrient diagnosis, and nitrogen and calcium uptake during early growth of physic nut

Interação cálcio e boro na fixação biológica de nitrogênio na soja: avaliação morfológica, ultraestrutural e da atividade da nitrogenase

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