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Check the list of papers from NScTI Citrus
Use the filters at the top of the list to select articles by year or by researcher. In the box for each article, use the links ("Summary", "Links", "BibTeX") to open additional information.
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2020
Perino, Elvio Henrique Benatto; Glienke, Chirlei; Silva, Alan Oliveira; Deising, Holger B.
In: Phytopathology, vol. 110, iss. 9, pp. 1530-1540, 2020, ISSN: 19437684.
Abstract | Links | BibTeX | Tags: Acetohydroxamic acid, Allantoicase, Ammonium, Appressorial penetration, Biochemistry and cell biology, Disease control and pest management, Mycology, Nitrogen limitation, Novel plant health strategy, Phytophthora, Powdery mildew, Rust, Urease
@article{Perino2020,
title = {Molecular characterization of the purine degradation pathway genes ALA1 and URE1 of the maize anthracnose fungus colletotrichum graminicola identified urease as a novel target for plant disease control},
author = {Elvio Henrique Benatto Perino and Chirlei Glienke and Alan Oliveira Silva and Holger B. Deising},
url = {https://apsjournals.apsnet.org/doi/10.1094/PHYTO-04-20-0114-R},
doi = {10.1094/PHYTO-04-20-0114-R/ASSET/IMAGES/LARGE/PHYTO-04-20-0114-RF6.JPEG},
issn = {19437684},
year = {2020},
date = {2020-01-01},
journal = {Phytopathology},
volume = {110},
issue = {9},
pages = {1530-1540},
publisher = {American Phytopathological Society},
abstract = {Fungal pathogenicity is governed by environmental factors, with nitrogen playing a key role in triggering pathogenic development. Spores germinating on the plant cuticle are exposed to a nitrogen-free environment, and reprograming of nitrogen metabolism is required for bridging the time needed to gain access to the nitrogen sources of the host. Although degradation of endogenous purine bases efficiently generates ammonium and may allow the fungus to bridge the preinvasion nitrogen gap, the roles of the purine degradation pathway and of the key genes encoding allantoicase and urease are largely unknown in plant pathogenic fungi. To investigate the roles of the allantoicase and urease genes ALA1 and URE1 of the maize anthracnose fungus Colletotrichum graminicola in pathogenic development, we generated ALA1:eGFP and URE1:eGFP fusion strains as well as allantoicase- and urease-deficient mutants. Virulence assays, live cell, and differential interference contrast imaging, chemical complementation and employment of a urease inhibitor showed that the purine degradation genes ALA1 and URE1 are required for bridging nitrogen deficiency at early phases of the infection process and for full virulence. Application of the urease inhibitor acetohydroxamic acid did not only protect maize from C. graminicola infection, but also interfered with the infection process of the wheat powdery mildew fungus Blumeria graminis f. sp. tritici, the maize and broad bean rusts Puccinia sorghi and Uromyces viciae-fabae, and the potato late blight pathogen Phytophthora infestans. Our data strongly suggest that inhibition of the purine degradation pathway might represent a novel approach to control plant pathogenic fungi and oomycetes.},
keywords = {Acetohydroxamic acid, Allantoicase, Ammonium, Appressorial penetration, Biochemistry and cell biology, Disease control and pest management, Mycology, Nitrogen limitation, Novel plant health strategy, Phytophthora, Powdery mildew, Rust, Urease},
pubstate = {published},
tppubtype = {article}
}
Fungal pathogenicity is governed by environmental factors, with nitrogen playing a key role in triggering pathogenic development. Spores germinating on the plant cuticle are exposed to a nitrogen-free environment, and reprograming of nitrogen metabolism is required for bridging the time needed to gain access to the nitrogen sources of the host. Although degradation of endogenous purine bases efficiently generates ammonium and may allow the fungus to bridge the preinvasion nitrogen gap, the roles of the purine degradation pathway and of the key genes encoding allantoicase and urease are largely unknown in plant pathogenic fungi. To investigate the roles of the allantoicase and urease genes ALA1 and URE1 of the maize anthracnose fungus Colletotrichum graminicola in pathogenic development, we generated ALA1:eGFP and URE1:eGFP fusion strains as well as allantoicase- and urease-deficient mutants. Virulence assays, live cell, and differential interference contrast imaging, chemical complementation and employment of a urease inhibitor showed that the purine degradation genes ALA1 and URE1 are required for bridging nitrogen deficiency at early phases of the infection process and for full virulence. Application of the urease inhibitor acetohydroxamic acid did not only protect maize from C. graminicola infection, but also interfered with the infection process of the wheat powdery mildew fungus Blumeria graminis f. sp. tritici, the maize and broad bean rusts Puccinia sorghi and Uromyces viciae-fabae, and the potato late blight pathogen Phytophthora infestans. Our data strongly suggest that inhibition of the purine degradation pathway might represent a novel approach to control plant pathogenic fungi and oomycetes.
2019
Quaggio, José A.; Souza, Thais R.; Zambrosi, Fernando C. B.; Mattos, Dirceu; Boaretto, Rodrigo M.; Silva, Guilherme
Citrus fruit yield response to nitrogen and potassium fertilization depends on nutrient-water management system Journal Article
In: Scientia Horticulturae, vol. 249, pp. 329-333, 2019, ISSN: 0304-4238.
Abstract | Links | BibTeX | Tags: Acidification, Ammonium, fertigation, Ionic activity, irrigation, Nitrate, Soil solution
@article{Quaggio2019,
title = {Citrus fruit yield response to nitrogen and potassium fertilization depends on nutrient-water management system},
author = {José A. Quaggio and Thais R. Souza and Fernando C. B. Zambrosi and Dirceu Mattos and Rodrigo M. Boaretto and Guilherme Silva},
doi = {10.1016/J.SCIENTA.2019.02.001},
issn = {0304-4238},
year = {2019},
date = {2019-01-01},
journal = {Scientia Horticulturae},
volume = {249},
pages = {329-333},
publisher = {Elsevier},
abstract = {The objectives of the present study were to investigate the influence of water supply combined with different rates and methods of nitrogen (N) and potassium (K) application on fruit yield and nutrient use efficiency (NutUE) of citrus by monitoring plant nutritional status and soil solution dynamic. The experiment was carried out with 4-yr-old Natal sweet orange trees on Rangpur lime over 4 consecutive growing seasons. Treatments were composed of 2 rates of N and K (NK): 50% and 100% of the recommended rates for maximum yield in rain-fed environments and 3 nutrient-water management systems: non-irrigation + broadcast granular fertilizer, irrigation + broadcast granular fertilizer and fertilizer application via irrigation (fertigation). Fruit yield was maximum under fertigation with application of 50% of the NK rate, and fertigation improved NutUE by 22% compared to non-irrigated trees. However, no difference in productivity and NutUE occurred across nutrient-water management systems under 100% of the NK rate. Differences in plant nutritional were not consistent across treatments and did not contribute to explain variations in fruit yield and NutUE. Soil solution analysis of fertigated trees receiving 100% of the NK rate revealed the lowest pH value and the highest concentration of N-NH 4 . It is concluded that fruit yield responses of citrus trees treated with established NK rates for rain-fed environments might be limited by soil solution acidification and N-NH 4 toxicity when fertilizers are applied via fertigation, being necessary further adjustments on fertilization management of fertigated citrus groves.},
keywords = {Acidification, Ammonium, fertigation, Ionic activity, irrigation, Nitrate, Soil solution},
pubstate = {published},
tppubtype = {article}
}
The objectives of the present study were to investigate the influence of water supply combined with different rates and methods of nitrogen (N) and potassium (K) application on fruit yield and nutrient use efficiency (NutUE) of citrus by monitoring plant nutritional status and soil solution dynamic. The experiment was carried out with 4-yr-old Natal sweet orange trees on Rangpur lime over 4 consecutive growing seasons. Treatments were composed of 2 rates of N and K (NK): 50% and 100% of the recommended rates for maximum yield in rain-fed environments and 3 nutrient-water management systems: non-irrigation + broadcast granular fertilizer, irrigation + broadcast granular fertilizer and fertilizer application via irrigation (fertigation). Fruit yield was maximum under fertigation with application of 50% of the NK rate, and fertigation improved NutUE by 22% compared to non-irrigated trees. However, no difference in productivity and NutUE occurred across nutrient-water management systems under 100% of the NK rate. Differences in plant nutritional were not consistent across treatments and did not contribute to explain variations in fruit yield and NutUE. Soil solution analysis of fertigated trees receiving 100% of the NK rate revealed the lowest pH value and the highest concentration of N-NH 4 . It is concluded that fruit yield responses of citrus trees treated with established NK rates for rain-fed environments might be limited by soil solution acidification and N-NH 4 toxicity when fertilizers are applied via fertigation, being necessary further adjustments on fertilization management of fertigated citrus groves.