Morfofisiologia de plantas de couve manteiga sob concentrações de húmus líquido

Rocha, Maria Eunice Lima; Coutinho, Pablo Wenderson Ribeiro; Abade, Mayra Taniely Ribeiro; Inagaki, Adriano Mitio; Cadorin, Danielle Acco; Hoepers, Lívia Maria Lemos

doi:10.5965/223811711842019438

Cited by 4 publications

(6 citation statements)

References 6 publications

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“…Segundo estudo realizado por Rocha et al (2019) [20], o estresse pode ser causado devido ao ambiente de cultivo, sendo necessário conhecer tanto a morfologia quanto as variáveis fisiológicas da planta como os pigmentos fotoprotetores. A clorofila a, por exemplo, é um pigmento de suma importância na planta pois apresenta-se na fase fotoquímica, enquanto os demais pigmentos auxiliam na absorção de luz e na transferência da energia para os centros de reação [21].…”

Section: Resultsunclassified

Desempenho produtivo e bioquímico de alface crespa sob diferentes ambientes de cultivo

et al. 2021

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O trabalho teve por objetivo avaliar as características morfométricas e bioquímicas de cultivares de alface crespa em estufa e campo no Oeste do Paraná. O delineamento experimental foi de blocos ao acaso em esquema fatorial 2 × 6, com quatro repetições. O primeiro fator constou pelo ambiente de cultivo (estufa e campo) e o segundo, seis cultivares de alface da tipologia crespa (Camila, Isabela, Vanda, Vera, Pira Roxa e Scarlet). As avaliações morfométricas foram realizadas logo após do material vegetal, sendo quantificado a altura de planta, número de folhas, diâmetro da copa, massa fresca da parte aérea, massa fresca de folhas, área foliar e produtividade. Para as características bioquímicas, foram coletadas amostras de tecido foliar das cultivares de alface, em cada ambiente, devidamente identificadas, armazenadas e conduzidas para o laboratório onde foram avaliados teor de clorofila a, b e total, carotenoides, antocianina, acidez titulável, potencial hidrogeniônico e sólidos solúveis. Não foi constatada interação significativa entre as cultivares e os ambientes para as análises morfométricas. Entretanto, a cultivar Vanda apresentou produtividade superior em relação as demais. Em relação aos aspectos bioquímicos, para as variáveis clorofila a e clorofila total, foram observadas as maiores médias para a cultivar Scarlet em estufa. Para teores de antocianina, a cultivar Scarlet apresentou valores superiores a campo e em relação a estufa, a cultivar Pira roxa apresentou maiores teores de carotenoides. O cultivo em estufa proporcionou melhores condições para o cultivo de alface, promovendo de modo geral, resposta superior nas características morfológicas e bioquímicas.

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Section: Resultsunclassified

Desempenho produtivo e bioquímico de alface crespa sob diferentes ambientes de cultivo

et al. 2021

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“…The gs decreased with the increase of calcium silicate doses at the full flowering stage, at 58 DAT ( Figure 2B), with no significant effect for this variable in the other evaluations. This reduction may have occurred due to some momentary stress, such as an increase in temperature, as gs is a punctual measure and will determine the number of stomata opened at the time of reading (Rocha et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…It was also observed that Ci presented a negative correlation with WUE, iWUE, and ACi (Table 2), which influenced the stoma opening and closing, the entry and exit of CO2, the loss of water, and consequently, its fixation in the formation of new carbohydrates. Lower Ci values stimulate stoma closure with a consequent decrease in the rate of CO2 assimilation (Rocha et al, 2019).…”

Section: Datmentioning

confidence: 99%

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Photosynthetic Efficiency of Tomato Plants Submitted to Calcium Silicate Application

Coutinho

Echer

Guimarães

et al. 2020

Rev. Agric. Neotrop.

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The objective was to evaluate the effect of calcium silicate on the chlorophyll content and gas exchange of two tomato hybrids. The design used was in randomized blocks in a 2x5 factorial scheme, with four replications. The first factor was composed of two tomato hybrids: Ivety and Natália, and the second factor was composed of five doses of calcium silicate (0, 150, 300, 450, and 600 kg ha-1), applied to the substrate before planting the seedlings. Gas exchange: net CO2 assimilation rate (A), leaf transpiration rate (E), stomatal conductance (gs), internal CO2 concentration (Ci), water-use efficiency (WUE), intrinsic efficiency water use (iWUE), and instant carboxylation efficiency (ACi); SPAD index and the levels of chlorophylls a, b, and total were evaluated. The analyzes were performed in the stages of first flowering (17 days after transplanting - DAT), full flowering (58 DAT), and full fruiting (78 DAT). At 17 DAT, no difference was observed for gas exchange variables and photosynthetic pigments. The application of calcium silicate reduced gas exchange and photosynthetic pigments at 58 DAT. The hybrid Natália had the highest A, WUE, iWUE, and ACi at 78 DAT. However, the hybrid Ivety in the same growth stage, in full fruiting, was superior only for the internal concentration of CO2 and SPAD index, with no difference for photosynthetic pigments.

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“…The reduction in Ci during the vegetative stage for the cv. Princesa was associated with an increase in A rate during this phase (Table 3); this may have been a strategy to stimulate stomatal opening, the entry of CO 2 and consequently carbon fixation for carbohydrate production (Rocha et al, 2019), given that this phase demonstrated the highest CEi for the production of photoassimilates in the growth and development of apple trees (Table 3).…”

Section: Medium Squaresmentioning

confidence: 99%

Physiological and biochemical responses of apple trees to irrigation water depth in a semiarid region of Brazil

et al. 2020

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The present study evaluated the physiological and biochemical parameters of apple trees under different irrigation water depths in a semiarid region of Brazil. The experiment had a split-plot randomized block design. Irrigation levels (60, 80, 100, and 120% of the reference evapotranspiration - ET0) and two apple cultivars (Julieta and Princesa) were analysed in the experimental plots and the phenological stages (vegetative, flowering and fruiting) were analysed in the experimental subplots. The physiological characteristics evaluated included the chlorophyll index, relative water content, net photosynthesis, stomatal conductance, transpiration, internal CO2 concentration, leaf temperature and instant carboxylation efficiency. The biochemical characteristics evaluated included the leaf contents of reducing sugars, total soluble sugars, and non-reducing sugars and proteins. The best biochemical responses were observed in the Princesa cultivar under 80% ET0 during the flowering and vegetative stages and under 120% ET0 during the fruiting stage. The best physiological responses for all phenological stages were observed under irrigation levels of 120% ET0 for both cultivars. The cv. Princesa demonstrated osmotic adjustment under water stress conditions during the phenological stages evaluated.

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Morfofisiologia de plantas de couve manteiga sob concentrações de húmus líquido

Cited by 4 publications

References 6 publications

Desempenho produtivo e bioquímico de alface crespa sob diferentes ambientes de cultivo

Desempenho produtivo e bioquímico de alface crespa sob diferentes ambientes de cultivo

Photosynthetic Efficiency of Tomato Plants Submitted to Calcium Silicate Application

Physiological and biochemical responses of apple trees to irrigation water depth in a semiarid region of Brazil

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