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Your search keyword '"Gabriel S. Montanha"' showing total 8 results
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8 results on '"Gabriel S. Montanha"'

1. Reducing Nitrogen Dosage in Triticum durum Plants with Urea-Doped Nanofertilizers

Author

Gloria B. Ramírez-Rodríguez, Cristina Miguel-Rojas, Gabriel S. Montanha, Francisco J. Carmona, Gregorio Dal Sasso, Josefina C. Sillero, Jan Skov Pedersen, Norberto Masciocchi, Antonietta Guagliardi, Alejandro Pérez-de-Luque, and José M. Delgado-López

Subjects
nanofertilizer, agriculture, calcium phosphate, wheat, quality, urea, Chemistry, QD1-999
Abstract

Nanotechnology is emerging as a very promising tool towards more efficient and sustainable practices in agriculture. In this work, we propose the use of non-toxic calcium phosphate nanoparticles doped with urea (U-ACP) for the fertilization of Triticum durum plants. U-ACP nanoparticles present very similar morphology, structure, and composition than the amorphous precursor of bone mineral, but contain a considerable amount of nitrogen as adsorbed urea (up to ca. 6 wt % urea). Tests on Triticum durum plants indicated that yields and quality of the crops treated with the nanoparticles at reduced nitrogen dosages (by 40%) were unaltered in comparison to positive control plants, which were given the minimum N dosages to obtain the highest values of yield and quality in fields. In addition, optical microscopy inspections showed that Alizarin Red S stained nanoparticles were able to penetrate through the epidermis of the roots or the stomata of the leaves. We observed that the uptake through the roots occurs much faster than through the leaves (1 h vs. 2 days, respectively). Our results highlight the potential of engineering nanoparticles to provide a considerable efficiency of nitrogen uptake by durum wheat and open the door to design more sustainable practices for the fertilization of wheat in fields.

Published
2020
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3. Time-Resolved Characterisation of Storage Proteins and Mineral Nutrients Dynamics During the Development of Soybean Seeds

Author

Gabriel S. Montanha, Nandhara Angélica Carvalho Mendes, Lucas Coan Perez, Matheus Luís Oliveira Cunha, Eduardo Santos, Carlos Alberto Perez, Eduardo de Almeida, João Paulo Rodrigues Marques, Renan Caldas Umburanas, Francisco Scaglia Linhares, André Rodrigues Reis, Sabrina Sabatini, and Hudson Wallace Pereira de Carvalho

Published
2023
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5. Localization of Coated Iron Oxide (Fe

Author

Elizabeth C H T, Lau, Lucas B, Carvalho, Anderson E S, Pereira, Gabriel S, Montanha, Camila G, Corrêa, Hudson W P, Carvalho, Alexey Y, Ganin, Leonardo F, Fraceto, and Humphrey H P, Yiu

Abstract

Food demand due to the growing global population has been stretching the agriculture sector to the limit. This demands the cultivation of plants in shrinking land areas which makes the search for highly effective systems for plant nutrition and pest control important. In this context, the application of nanoparticles (NPs) in agriculture can have a transformative effect on food production techniques as it can enable the delivery of bioactive agents (including growth factors, pesticides, and fungicides) directly to plants. Herein, we report the application of unfunctionalized as well as amine-functionalized and polycaprolactone-coated Fe

Published
2022

7. Zinc uptake from ZnSO

Author

Gabriel S, Montanha, Eduardo S, Rodrigues, Sara L Z, Romeu, Eduardo, de Almeida, André R, Reis, José, Lavres, and Hudson W, Pereira de Carvalho

Subjects
Zinc, Spectrum Analysis, Biological Transport, Soybeans, Plant Roots, Edetic Acid, Plant Shoots, Zinc Sulfate
Abstract

This study investigated the dynamic of zinc (Zn) uptake and the root-to-shoot Zn-transport when supplied as ZnSO

Published
2019

8. A new glance on root-to-shoot in vivo zinc transport and time-dependent physiological effects of ZnSO

Author

Tatiana N M, da Cruz, Susilaine M, Savassa, Gabriel S, Montanha, Juliane K, Ishida, Eduardo, de Almeida, Siu M, Tsai, José, Lavres Junior, and Hudson W, Pereira de Carvalho

Subjects
Phaseolus, Transcription, Genetic, Plant physiology, Plant Roots, Article, Plant Leaves, Zinc, Transporters, X-Ray Absorption Spectroscopy, Metals, Nanoparticles, Permeation and transport, Photosynthesis, Zinc Oxide, Analytical chemistry, Plant Shoots
Abstract

Understanding nanoparticle root uptake and root-to-shoot transport might contribute to the use of nanotechnology in plant nutrition. This study performed time resolved experiments to probe Zn uptake, biotransformation and physiological effects on Phaseolus vulgaris (L.). Plants roots were exposed to ZnO nanoparticles (40 and 300 nm) dispersions and ZnSO4(aq) (100 and 1000 mg Zn L−1) for 48 h. Near edge X-ray absorption spectroscopy showed that 40 nm ZnO was more easily dissolved by roots than 300 nm ZnO. It also showed that in the leaves Zn was found as a mixture Zn3(PO4)2 and Zn-histidine complex. X-ray fluorescence spectroscopy showed that root-to-shoot Zn-translocation presented a decreasing gradient of concentration and velocity, it seems radial Zn movement occurs simultaneously to the axial xylem transport. Below 100 mg Zn L−1, the lower stem tissue section served as a buffer preventing Zn from reaching the leaves. Conversely, it was not observed for 1000 mg Zn L−1 ZnSO4(aq). Transcriptional analysis of genes encoding metal carriers indicated higher expression levels of tonoplast-localized transporters, suggesting that the mechanism trend to accumulate Zn in the lower tissues may be associated with an enhanced of Zn compartmentalization in vacuoles. The photosynthetic rate, transpiration, and water conductance were impaired by treatments.

Published
2018

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