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Distinct physiological mechanisms underpin growth and rehydration of Hymenaea courbaril and Hymenaea stigonocarpa upon short-term exposure to drought stress

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Journal of Forestry Research 2023年第1期34卷 113-123页

作者： Luana M.Luz Ediane C.Alves Nariane Q.Vilhena tamires b.oliveira Zara G.b.Silva Joze M.N.Freitas Candido F.O.Neto Roberto C.L.Costa Lucas C.Costa Universidade Federal Rural da AmazOia CapanemaPA 68700-665Brazil Universidade Federal Rural da AmazEia BelémPA 66077-830Brazil

Plants hold biochemical and physiological mechanisms to withstand drought conditions.Generally,depending on water deficit interval,plant rehydration relies on how it can retain growth or a positive water balance—or rarely both.In this study,two species of Hymenaea,one from the Amazon and the other from the brazilian Cerrado,were investigated for their physiological mechanism associated with growth rehydration upon short-term exposure to drought stress.Our findings demonstrate that Hymenaea courbaril tends to invest in nitrogen to the detriment of carbon compounds,-as it is limited by lower net photosynthesis-and adjust root growth to attenuate drought stress responses.In contrast,Hymenaea stigonocarpa takes advantage of higher water potential and a basal rate of lower net photosynthesis to support aboveground growth under such conditions.Hence,it is postulated that there are distinct ways of controlling water status and growth between H.courbaril and H.stigonocarpa,which are determined either by the ability of the species to keep net photosynthesis at low levels of water content or by favoring the accumulation of nitrogen compounds.both mechanisms were effective with regards to water use efficiency and thus it is reasonable to suggest that strategies are not exclusive and may work under adverse conditions,as observed in Amazon and brazilian Cerrado biomes.Query.

关键词： Hymenaea courbaril Hymenaea stigonocarpa Growth Photosynthesis Water deficit

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Osmoregulators in Hymenaea courbaril and Hymenaea stigonocarpa under water stress and rehydration

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Journal of Forestry Research 2018年第6期29卷 1475-1479页

作者： Luma Castro de Souza Luana Moraes da Luz Je′ssica Taynara da Silva Martins Candido Ferreira de oliveira Neto Juscelino Goncalves Palheta tamires borges de oliveira Ediane Conceicao Alves Risely Ferraz de Almeida Raimundo Leonardo Lima de oliveira Roberto Cezar Lobo da Costa Nariane Quaresma Vilhena Universidade estadual paulista ju′lio de mesquita filho JaboticabalSP 14884-900Brazil Universidade Federal Rural da Amazonia(UFRA) Campus CapanemaCapanema 68700-030Brazil Universidade Federal Rural da Amazonia Campus BelemBelem 66077-830Brazil Universidade Federal de Vicosa(UFV) Vicosa 36570-900Brazil Universidade Estadual Paulista Ju′lio de Mesquita Fiho(UNESP) Jaboticabal 14884-900Brazil Universidade do Estado do Para′(UEPA) Bele′m 66113-200Brazil

The objective of this work was to evaluate the effect of different water deficiency and rehydration levels on the concentrations of osmoregulators in two plant species（Hymenaea courbaril and H. Stigonocarpa） in the Amazon. We adopted a 2×5×5 factorial system,referring to 2 species（H. courbaril and H. stigonocarpa）and 5 stages of hydration and rehydration. The five hydration and rehydration stages were established in:（1）Control treatment E0;（2） Plants with 13 days of stress after incubation—E13;（3） Plants with 26 days of stress E26;（4）The plants that were established after 26 days after incubation and rehydrated for two days（RD2）;（5） rehydrated for two days（RD4）. The plants that were established after 26 days after incubation and rehydrated for four days. The experiment totaled fifty young plants with five replicates.biochemical measurements were performed at the beginning of the experiment（E0） at 13（E13） and 26（E26） days after the water stress, in which the plants were rehydrated,repeating the analyses after two（RD2） and four（RD4）days. both species increased the sucrose concentration by18%, with a decrease of 52% in starch content. The RD4 time presented the highest mean starch concentration(0.19 mmol g-1 of the residue for H. courbaril and0.27 mmol g;of residue for H. stigonocarpa). Increased proline concentrations were recorded for controls until RD2 for both species. For glycine betaine, the highest increases in treatments E26 and RD2 were observed for the H. courbaril species. Our rehydration period was not sufficient for total recovery of pre-stress concentrations of all studied solutes.

关键词： Amazonia Water stress Osmotic adjustment Proline Sucrose

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Role of Cognitive behavioral Therapy in Fibromyalgia: A Systematic Review

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Open Journal of Rheumatology and Autoimmune Diseases 2021年第4期11卷 169-187页

作者： Heloisa Lima Heller Aline Rizzo borges Luís Otávio Amarante Franco João Pedro De oliveira Aucelio Marcos Igor Albanaz Vargas Rebeca Naoum Lorga Mirella bastos Sales Natália Vargas Do Nascimento Gabriela Furlan Ribeiro barbosa Netto beatriz Carneiro Passos beatriz Pires Paes beatriz Toledo Mendes bruna De Paula Gonçalves Sousa Lyra Ciro Moisés oliveira Vieira Dos Santos Gustavo Araújo Do Nascimento Santos Maria Luiza Pimentel De oliveira Matheus Macêdo Da Silva Maurício Silva De Jesus Paulo Ricardo Guimaraes Rocha Storni tamires Martinelli De oliveira Ferraz Viviane Cristina Uliana Peterle Ana Paula Monteiro Gomides Reis Centro Universitário de brasília Brasília Brazil Universidade Católica de brasília Brasília Brazil Centro Universitário Euro Americano Brasília Brazil

A literature search of articles from 2002-2019 was performed using Medline, Embase, Cochrane, LILACS, IbECS, CRD, and Epistemonikos databases, to analyze the effects of Cognitive-behavioral Therapy (CbT) in the treatment of fibromyalgia. Twenty-seven articles were selected in which CbT was performed exclusively by specialist physicians, associated or not with conventional pharmacological treatment and/or physical exercise. In most articles, CbT worked with self-knowledge and cognitive restructuring, attempting to reduce pain perception, and it showed a general improvement in daily activities by decreasing patient’s limitations, such as morning stiffness. The literature showed significant correlations of CbT in pain processing over time. When CbT was compared to conventional pharmacological therapy, a certain superiority of CbT could be observed concerning the quality of life, catastrophizing, and acceptance of pain. However, when they were simultaneously applied, this improvement in quality of life was not observed.

关键词： Cognitive behavioral Therapy Fibromyalgia Pain

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