Role of integrated crop-livestock system on amelioration of heat stress on crossbred Brazilian sheep in semiarid region of northeastern Brazil

2021 ◽  
Vol 204 ◽  
pp. 106513
Author(s):  
José Gabriel Gonçalves Lins ◽  
Serginara David Rodrigues ◽  
Ana Cláudia Alexandre Albuquerque ◽  
Ana Valéria Mello de Souza Marques
Keyword(s):  
Heat Stress ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Livestock System

scholarly journals Recapitulation of the Function and Role of ROS Generated in Response to Heat Stress in Plants

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 371
Author(s):  
Emily Medina ◽  
Su-Hwa Kim ◽  
Miriam Yun ◽  
Won-Gyu Choi
Keyword(s):  
Heat Stress ◽  
Plant Growth ◽  
Intracellular Signaling ◽  
Oxygen Species ◽  
Natural Ecosystems ◽  
Signaling Molecule ◽  
Signaling Systems ◽  
Cell Compartments ◽  
Tropical Area

In natural ecosystems, plants are constantly exposed to changes in their surroundings as they grow, caused by a lifestyle that requires them to live where their seeds fall. Thus, plants strive to adapt and respond to changes in their exposed environment that change every moment. Heat stress that naturally occurs when plants grow in the summer or a tropical area adversely affects plants’ growth and poses a risk to plant development. When plants are subjected to heat stress, they recognize heat stress and respond using highly complex intracellular signaling systems such as reactive oxygen species (ROS). ROS was previously considered a byproduct that impairs plant growth. However, in recent studies, ROS gained attention for its function as a signaling molecule when plants respond to environmental stresses such as heat stress. In particular, ROS, produced in response to heat stress in various plant cell compartments such as mitochondria and chloroplasts, plays a crucial role as a signaling molecule that promotes plant growth and triggers subsequent downstream reactions. Therefore, this review aims to address the latest research trends and understandings, focusing on the function and role of ROS in responding and adapting plants to heat stress.

The neglected other half ‐ role of the pistil in plant heat stress responses

2021 ◽  
Author(s):  
Yuanyuan Wang ◽  
S.M. Impa ◽  
Ramanjulu Sunkar ◽  
S.V. Krishna Jagadish
Keyword(s):  
Heat Stress ◽  
Stress Responses

The role of different dietary Zn sources in modulating heat stress-related effects on some thermoregulatory parameters of New Zealand white rabbit bucks

2021 ◽  
pp. 1-10
Author(s):  
Mohamed S. El-Kholy ◽  
Mohamed M. El-Mekkawy ◽  
Mahmoud Madkour ◽  
Nafisa Abd El-Azeem ◽  
Alessandro Di Cerbo ◽  
...  
Keyword(s):  
Heat Stress ◽  
New Zealand ◽  
Zealand White Rabbit ◽  
New Zealand White Rabbit

scholarly journals Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models

2016 ◽  
Vol 76 (2) ◽  
pp. 341-351
Author(s):  
L. F. C. Rezende ◽  
B. C. Arenque-Musa ◽  
M. S. B. Moura ◽  
S. T. Aidar ◽  
C. Von Randow ◽  
...  
Keyword(s):  
Data Mining ◽  
Native Species ◽  
Classification And Regression Tree ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Global Changes ◽  
Data Mining Techniques ◽  
Dynamic Global Vegetation Models ◽  
Vegetation Models ◽  
Global Vegetation

Abstract The semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face of global changes. In a field work realized in an area of preserved Caatinga forest located in Petrolina, Pernambuco, measurements of carbon assimilation (in response to light and CO2) were performed on 11 individuals of Poincianella microphylla, a native species that is abundant in this region. These data were used to calibrate the maximum carboxylation velocity (Vcmax) used in the INLAND model. The calibration techniques used were Multiple Linear Regression (MLR), and data mining techniques as the Classification And Regression Tree (CART) and K-MEANS. The results were compared to the UNCALIBRATED model. It was found that simulated Gross Primary Productivity (GPP) reached 72% of observed GPP when using the calibrated Vcmax values, whereas the UNCALIBRATED approach accounted for 42% of observed GPP. Thus, this work shows the benefits of calibrating DGVMs using field ecophysiological measurements, especially in areas where field data is scarce or non-existent, such as in the Caatinga.

scholarly journals Systemic acanthamoebiasis associated with canine distemper in dogs in the semiarid region of Paraíba, Brazil

2015 ◽  
Vol 35 (2) ◽  
pp. 160-164 ◽  
Author(s):  
Maria T.S. Frade ◽  
Luiza F. de Melo ◽  
Clarice R.M. Pessoa ◽  
Jeann L. de Araújo ◽  
Rafael A. Fighera ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Parietal Cortex ◽  
Systemic Disease ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Canine Distemper ◽  
Free Living ◽  
Gross Lesions ◽  
Microscopic Findings

Infections by free-living amoebae can cause systemic disease in animals and humans. We describe the epidemiological, clinical and pathological aspects of disseminated acanthamoebiasis associated with canine distemper in three dogs of the semiarid region of Paraíba, Northeastern Brazil. Affected dogs developed progressive neurological and respiratory signs that progressed to death within in two to 20 days. Gross lesions were irregular and with yellow-reddish nodules randomly distributed in the lungs, heart, kidneys, spleen, lymph nodes, adrenals, and intestine. One dog had foci of malacia in the parietal cortex and another one in nucleus of brain basis. Histologically, pyogranulomas with areas of necrosis and hemorrhage in all organs affected were observed, associated with myriads of intralesional amoebic trophozoites. All three cases were concomitant canine distemper, that possibly triggered immunosuppression in the dogs. The diagnosis was performed through microscopic findings of infection by free-living amoebae and confirmed Acanthamoeba sp. by immunohistochemistry

The role of diet on the rhythm of physiological responses of lactating ewes under heat stress

2018 ◽  
Vol 51 (3) ◽  
pp. 349-361
Author(s):  
Fernanda Patricia Gottardi ◽  
Tairon Pannunzio Dias e Silva ◽  
Patrick Elves Paraguaio ◽  
Jacira Neves da Costa Torreão ◽  
Carlo Aldrovandi Torreão Marques ◽  
...  
Keyword(s):  
Heat Stress ◽  
Physiological Responses

scholarly journals Anti-Thrombin, Anti-Adhesive, Anti-Migratory, and Anti-Proliferative Activities of Sulfated Galactans from the Tropical Green Seaweed, Udotea flabellum

Marine Drugs ◽  
2018 ◽  
Vol 17 (1) ◽  
pp. 5 ◽  
Author(s):  
Maxsuell Mendes Marques ◽  
Fernando Presa ◽  
Rony Viana ◽  
Mariana Costa ◽  
Monica Amorim ◽  
...  
Keyword(s):  
Antitumor Agents ◽  
Anticoagulant Activity ◽  
Sulfated Polysaccharide ◽  
Northeastern Brazil ◽  
Sulfated Galactans ◽  
Green Seaweed ◽  
Coated Surface ◽  
Time Test ◽  
Coated Surfaces

In this study, sulfated polysaccharide-rich extracts were isolated from 22 tropical seaweeds (4 red, 11 brown, and 7 green) found in northeastern Brazil, and evaluated for the role of anticoagulant agents. Fifteen of the extracts showed anticoagulant activity, including all the extracts from green seaweeds. Udotea flabellum (a green seaweed) extract was the most potent, requiring an amount of only 3 µg to double the plasma coagulation time in the activated partial thromboplastin time test. A similar result was obtained with 1 µg of heparin. Two sulfated homogalactans with anticoagulant activity, F-I (130 kDa) and F-II (75 kDa), were isolated from this extract using several bio-guided purification steps. Their anticoagulant activity, as well as properties related to antitumor activity (anti-proliferative, anti-adhesive, and anti-migratory), were accessed. Their anticoagulant activities were close to that of heparin. We found that F-I and F-II (0.5–10 μg/mL) were not able to directly inhibit thrombin. In the presence of anti-thrombin, F-I (0.5 μg/mL) was more effective than heparin (0.5 μg/mL) in inhibiting thrombin, while F-II showed similar effects as heparin. F-I and F-II also inhibited B16-F10 (murine melanoma cells) adhesion, migration, and proliferation on a fibronectin-coated surface, but not on laminin- or collagen I-coated surfaces. Except for the antiproliferative activity, the other effects of F-I and F-II were eliminated upon their desulfation (~50%), indicating that the degree of sulfation is not as important for F-I and F-II anti-proliferative activity as the sulfation position. Taken together, the results provide strong evidence for the potential utility of sulfated galactans from U. flabellum, making these compounds an interesting option for future investigations that aim to design new anticoagulant/antitumor agents.

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