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2. Maize Morphophysiological Changes Modulated by Cover Crops Rotation in Northeast Brazil.

Author

Souza, José Wilker Germano de, Luz, João Henrique Silva da, Silva, Dayane Mércia Ribeiro, Silva, Ricardo Barros, Costa, Bruno Richardson dos Santos, Melo, Alan Fontes, Santos, Hugo Rodrigues dos, Marques, Isabelly Cristina da Silva, Sousa, Jadielson Inácio de, Vanderley, Mariana Bernardino, Barbosa, Luana do Nascimento Silva, Farias, Maria Raquel da Silva, Farias, Emerson dos Santos Ferreira, Paulino, Sivaldo Soares, Santos Neto, Antônio Lucrécio dos, Pavinato, Paulo Sergio, Silva, José Vieira, and Santos, Valdevan Rosendo dos

Subjects
SUSTAINABLE agriculture, PIGEON pea, CORN, WATER efficiency, CROP rotation, COVER crops
Abstract

Cover crops have gained attention due to their potential benefits for the soil and physiological performance of subsequent crops. This study aimed to evaluate the physiological and productive aspects of maize grown in succession to cover crops in northeastern Brazil. A randomized complete block design with four repetitions was employed, in which the treatments consisted of the following cover crops: sunn hemp, spectabilis, pigeon pea, Brachiaria sp., jack bean, millet, and fallow. Physiological aspects and production components of maize were evaluated at the tasseling (VT) and smooth grain (R3) phenological stages. Millet cover increased carotenoid content in maize leaves by up to 78% at R3. Maize grown after pigeon pea, millet, and Brachiaria sp. showed up to 42% greater CO2 assimilation efficiency compared to jack bean. Carboxylation efficiency increased by up to 34% in maize grown after millet and Brachiaria sp., while water use efficiency improved by up to 76% in maize after sunn hemp and pigeon pea at R3. Sunn hemp, spectabilis, and jack bean reduced soil temperature by 2 °C compared to fallow. The highest maize yield was observed after jack bean, with an 8% increase over fallow. These findings demonstrate the benefits of incorporating cover crops into maize cultivation systems in the semi-arid region of Brazil. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Application of Plant Growth Regulators Mitigates Water Stress in Basil.

Author

Silva, Dayane Mércia Ribeiro, Marques, Isabelly Cristina da Silva, Carvalho, Beatriz Lívero, Aires, Eduardo Santana, Freitas Júnior, Francisco Gilvan Borges Ferreira, Vargens, Fernanda Nery, Santos, Vinicius Alexandre Ávila dos, Luz, João Henrique Silva da, Souza, José Wilker Germano de, Oliveira Galdino, Wesley de, Sousa, Jadielson Inácio de, Melo, Alan Fontes, Silva, Ricardo Barros, Barbosa, Luana do Nascimento Silva, Silva, José Vieira, Santos, Valdevan Rosendo dos, Góis, Maria Gleide Jane Lima de, Paulino, Sivaldo Soares, Ono, Elizabeth Orika, and Rodrigues, João Domingos

Subjects
PLANT regulators, CHLOROPHYLL spectra, FACTORIAL experiment designs, PLANT-water relationships, FACTORS of production, BASIL
Abstract

Abiotic stresses, such as water limitation, are significant limiting factors in basil production. One alternative to mitigate the harmful effects of this stress on plants is using plant growth regulators. This study's objective is to evaluate different doses of plant regulators in basil under water deficiency conditions. A randomized block experimental design in a factorial scheme with two factors was used: the first factor referred to the water regimes of 50% and 100% stomatal conductance, the second to different doses of the plant regulator mixture: 0 mL L−1 (control), 3 mL L−1, 6 mL L−1, 9 mL L−1, and 12 mL L−1. Each treatment consisted of 12 pots per repetition. Biometric parameters, chlorophyll a fluorescence, and gas exchange were analyzed. The plant regulator positively influenced basil plants under water deficiency, with the most pronounced effects observed at the 12 mL L−1 dose: a 17% increase in the number of leaves, a fourfold increase in CO2 assimilation and carboxylation efficiency, and a sevenfold increase in water use efficiency. Therefore, the application of plant regulators on basil is recommended to mitigate the negative effects of water stress, with the most significant results observed at a dose of 12 mL L−1. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Impact of Photosynthetic Efficiency on Watermelon Cultivation in the Face of Drought.

Author

Silva, Dayane Mércia Ribeiro, Barros, Allan Cunha, Silva, Ricardo Barros, Galdino, Wesley de Oliveira, Souza, José Wilker Germano de, Marques, Isabelly Cristina da Silva, Sousa, Jadielson Inácio de, Lira, Viviane da Silva, Melo, Alan Fontes, Abreu, Lucas da Silva de, Albuquerque Júnior, Elias de Oliveira, Barbosa, Luana do Nascimento Silva, Santos Neto, Antônio Lucrécio dos, Santos, Valdevan Rosendo dos, Freitas Júnior, Francisco Gilvan Borges Ferreira, Vargens, Fernanda Nery, Luz, João Henrique Silva da, Ono, Elizabeth Orika, and Rodrigues, João Domingos

Subjects
WATER efficiency, DROUGHTS, LEAF temperature, ARID regions, WATERMELONS, WATER supply
Abstract

Water availability is a limiting factor for plant production, especially in Brazilian semi-arid regions. The main aim of the study was to investigate the physiological effects of drought during the fruiting stage of watermelon cultivation. A completely randomized block design with four replications and six treatments varied by the number of lateral drip tapes (1 or 2) and the duration of drought stress (0, 4, and 8 days) was used. The following parameters were evaluated: relative chlorophyll content, relative leaf water content, electrolyte leakage, CO2 assimilation (A), stomatal conductance (gs), internal CO2 concentration, leaf temperature, transpiration (E), water use efficiency (WUE), carboxylation efficiency (CE), yield, thickness, diameter, length, and fruit °brix, at 4 and 8 days of drought. Drought negatively affected photosynthesis, particularly in treatments with a single dripper and 4 days of drought, resulting in reductions of up to 60% in A, 68% in gs, 44% in E, 58% in WUE, and 59% in CE, but did not have a significant effect on watermelon yield after 4 or 8 days of irrigation. It was concluded that drought influences the physiological responses of watermelon plants, mainly in reducing photosynthesis, but does not drastically affect fruit productivity in short periods of stress. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Application of Strobilurins and Carboxamides Improves the Physiology and Productivity of Tomato Plants in a Protected Environment

Author

Jacobelis, Walter, primary, Aires, Eduardo Santana, additional, Ferraz, Andrew Kim Lopes, additional, Marques, Isabelly Cristina da Silva, additional, Freitas, Francisco Gilvan Borges Ferreira, additional, Silva, Dayane Mércia Ribeiro, additional, Ono, Elizabeth Orika, additional, and Rodrigues, João Domingos, additional

Published
2023
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8. Nitric oxide as a saline stress relieving agent in semi-hydroponic lettuce

Author

Marques, Isabelly Cristina da Silva, Universidade Estadual Paulista (Unesp), and Rodrigues, João Domingos [UNESP]

Subjects
Salinity, Hydroponics, Lactuca sativa, Hidroponia, Antioxidant enzymes, Enzimas antioxidantes, Sodium nitroprusside, Nitroprussiato de sódio, Salinidade
Abstract

Submitted by Isabelly Cristina da Silva Marques (isabelly_cristinna@hotmail.com) on 2020-04-23T21:42:27Z No. of bitstreams: 1 Dissertação - ISABELLY CRISTINA DA SILVA MARQUES.pdf: 1616512 bytes, checksum: b16db374681522900441d066232b26bc (MD5) Submitted by Isabelly Cristina da Silva Marques (isabelly_cristinna@hotmail.com) on 2020-04-23T21:42:27Z No. of bitstreams: 1 Dissertação - ISABELLY CRISTINA DA SILVA MARQUES.pdf: 1616512 bytes, checksum: b16db374681522900441d066232b26bc (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Submitted by Isabelly Cristina da Silva Marques (isabelly_cristinna@hotmail.com) on 2020-04-23T21:42:27Z No. of bitstreams: 1 Dissertação - ISABELLY CRISTINA DA SILVA MARQUES.pdf: 1616512 bytes, checksum: b16db374681522900441d066232b26bc (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Submitted by Isabelly Cristina da Silva Marques (isabelly_cristinna@hotmail.com) on 2020-04-23T21:42:27Z No. of bitstreams: 1 Dissertação - ISABELLY CRISTINA DA SILVA MARQUES.pdf: 1616512 bytes, checksum: b16db374681522900441d066232b26bc (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). 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No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Submitted by Isabelly Cristina da Silva Marques (isabelly_cristinna@hotmail.com) on 2020-04-23T21:42:27Z No. of bitstreams: 1 Dissertação - ISABELLY CRISTINA DA SILVA MARQUES.pdf: 1616512 bytes, checksum: b16db374681522900441d066232b26bc (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-04-24T12:01:19Z (GMT) No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Made available in DSpace on 2020-04-24T12:01:19Z (GMT). No. of bitstreams: 1 marques_ics_me_botfca_par.pdf: 924789 bytes, checksum: 040acd31040b937b9bafd67a72e388ea (MD5) Previous issue date: 2020-02-26 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Perante a atual demanda hídrica para manutenção de cultivos intensos e sucessivos, faz-se necessária a busca de alternativas para o manejo correto da água a fim de reduzir seu desperdício. Uma dessas alternativas se concentra na utilização de águas de qualidade inferior como, por exemplo, águas salobras. No entanto, uso de águas salobras podem ocasionar diversas alterações no metabolismo das plantas, necessitando de estratégias que permitam o uso dessas águas. Na busca dessas alternativas, busca-se substâncias biológicas ou sintéticas que gerem respostas fisiológicas e bioquímicas que promovam a adaptação das plantas às condições ambientais adversas, a exemplo do óxido nítrico (NO). Partindo desse pressuposto, objetivou-se com este trabalho avaliar o efeito atenuante do óxido nítrico em plantas de alface crespa, cv. Vera, cultivada sob estresse salino. O experimento foi realizado em casa de vegetação nos meses de abril e maio de 2019, da Fazenda Experimental de São Manuel da FCA, localizada no município de São Manuel/SP. O delineamento experimental adotado foi o de blocos ao acaso, em esquema fatorial de 5 x 2, sendo o primeiro fator compreendido por cinco concentrações de nitroprussiato de sódio (NPS) (0, 50, 100, 150 e 200 µmol) e o segundo fator foi composto por dois níveis salinos da água de irrigação (0,2 e 3,5 dS m-1, respectivamente, sem e com estresse salino), com quatro repetições. As concentrações de NPS foram aplicadas semanalmente (via foliar), totalizando três aplicações durante o ciclo. As variáveis analisadas foram: variáveis bioquímicas (peróxido de hidrogênio, peroxidação lipídica, enzimas antioxidantes e prolina), análises de trocas gasosas e fluorescência da clorofila a, determinação de pigmentos e variáveis biométricas (massa de matéria fresca de parte aérea, número de folhas, massa de matéria seca total, área foliar e conteúdo relativo de água). De modo geral, a análise estatística dos dados revelou efeito da interação entre os fatores (concentrações de NPS x níveis salinos) para a maioria das variáveis analisadas. Para as variáveis bioquímicas, a peroxidação lipídica e os níveis de peróxido de hidrogênio foram reduzidos com a aplicação das concentrações de NPS em plantas estressadas, promovendo também maior atividade das enzimas antioxidantes, bem como, o acúmulo de prolina nessas plantas. Para as análises de trocas gasosas e fluorescência da clorofila a, o estresse salino afetou negativamente essas variáveis; no entanto, a aplicação de NPS resultou na atenuação do estresse, promovendo também aumento no teor de carotenoides. Além disso, houve incrementos na massa de matéria fresca total e sobre o número de folhas das plantas na condição de estresse salino, evidenciando, portanto, efeito positivo na mitigação do estresse salino pela aplicação do doador de óxido nítrico. In view of the current water demand for maintaining intense and successive crops, it is necessary to search for alternatives for the correct management of water in order to reduce its waste. One of these alternatives focuses on the use of lower quality water, such as brackish water. However, the use of brackish water can cause several changes in the metabolism of plants, requiring strategies that allow the use of these waters. In the search for these alternatives, biological or synthetic substances are sought that generate physiological and biochemical responses that promote the adaptation of plants to adverse environmental conditions, such as nitric oxide (NO). Based on this assumption, the aim of this study was to evaluate the attenuating effect of nitric oxide on crisp lettuce plants, cv. Vera, grown under salt stress. The experiment was carried out in a greenhouse in the months of April and May 2019, at the São Manuel da FCA Experimental Farm, located in the municipality of São Manuel / SP. The experimental design adopted was that of randomized blocks, in a 5 x 2 factorial scheme, the first factor being comprised of five concentrations of sodium nitroprusside (SNP) (0, 50, 100, 150 and 200 µmol) and the second factor was composed of two saline levels of irrigation water (0.2 and 3.5 dS m-1, respectively, without and with salt stress), with four repetitions. SNP concentrations were applied weekly (via leaf), totaling three applications during the cycle. The variables analyzed were: biochemical variables (hydrogen peroxide, lipid peroxidation, antioxidant enzymes and proline), analysis of gas exchange and chlorophyll a fluorescence, determination of pigments and biometric variables (fresh matter of aerial part, number of leaves, total dry matter mass, leaf area and relative water content). In general, the statistical analysis of the data revealed the effect of the interaction between the factors (SNP concentrations x saline levels) for most of the analyzed variables. For biochemical variables, lipid peroxidation and hydrogen peroxide levels were reduced with the application of SNP concentrations in stressed plants, also promoting greater activity of antioxidant enzymes, as well as the accumulation of proline in these plants. For gas exchange and chlorophyll a fluorescence analyzes, saline stress negatively affected these variables; however, the application of SNP resulted in the attenuation of stress, also promoting an increase in the content of carotenoids. In addition, there were increases in the total fresh matter mass and the number of leaves of the plants in the condition of salt stress, thus showing a positive effect in mitigating salt stress by the application of the nitric oxide donor.

Published
2020

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