Water relations in physic nut according to climatic seasonality, in semiarid conditions

Rodrigues, Bruno M.; Arcoverde, Gabriela B.; Antonino, Antônio Celso Dantas; Santos, Mariana

doi:10.1590/s0100-204x2011000900020

Cited by 6 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the contrary, Egea et al (2011) stated that A increases with g s , both of which are affected by the radiation intensity (Turner and Thomas 1998). Indeed, they both decrease with the reduced incidence of PAR (Rodrigues et al 2011). Hence, although leaf humidity allowed stomatal opening, the reduced incidence of solar radiation affected the photochemical phase and reduced A in shaded leaves of AGP.…”

Section: Discussionmentioning

confidence: 98%

Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil

Mendes¹,

Lacerda²,

Fernandes³

et al. 2013

Theor. Exp. Plant Physiol.

View full text Add to dashboard Cite

Physiological differences in the Cordia oncocalyx tree growing at different densities in two distinct areas were investigated.An agrosilvopastoral system (AGP) and a secondary forest (SF) were studied. Under both types of land-use, C. oncocalyx presented a relative frequency of approximately 50%, and absolute densities of 670 and 80 individuals per hectare, respectively. Net photosynthesis (A), stomatal conductance (g s ), and transpiration (E) were measured, and the SPAD index was recorded in sun leaves from the canopy and shade leaves from the lower canopy, in both the wet and dry seasons. We quantified the dry biomass of leaves and fruit on a per-tree basis at the end of the wet season. Net photosynthesis was higher in shaded leaves in the AGP in the wet season, reaching an average of 4.8 µmol m -2 s -1 against 3.2 µmol m -2 s -1 under SF. As trees began to shed their leaves at the beginning of the dry season and more radiation reached the shaded leaves, there was an increase in SF for A, depending on the intensity of light reaching the leaves. In the sun leaves, gas exchange was similar for the land-use systems during the wet season, but stronger in AGP than under SF during the dry season. This happened when the leaves in AGP retained more relative water content during a period of low gravimetric levels of the soil water. The lower tree density in AGP promoted a higher SPAD index and dry biomass in both the sun and shaded leaves, and allowed greater A, E and g s rates in the sun leaves at the beginning of the dry period.

show abstract

Section: Discussionmentioning

confidence: 98%

Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil

Mendes¹,

Lacerda²,

Fernandes³

et al. 2013

Theor. Exp. Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…A redução da disponibilidade hídrica causa efeitos diretos na capacidade fotossintética das plantas, afetando as reações bioquímicas e o funcionamento do aparato fotossintético, e indiretamente pelo fechamento estomático (LAWLOR;CORNIC, 2002;SILVA et al, 2008;RODRIGUES et al, 2011;TONELLO;TEIXEIRA FILHO, 2012;CUNHA et al, 2013). A diminuição da abertura estomática é observada por muitos autores como sendo umas das respostas diretas ao estresse hídrico (LIBERATO et al, 2006;LIMA et al, 2010;WARREN et al, 2011;ALBUQUERQUE et al, 2013), como forma de reduzir aperda de água e a possibilidade de morte por dessecação (NOGUEIRA; SILVA, 2002;SILVA et al, 2009;CORDEIRO et al, 2009;SCALON et al, 2011).…”

Section: Campelo Dh Et Al 1 Introduçãounclassified

Trocas Gasosas E Eficiência Do Fotossistema Ii Em Plantas Adultas De Seis Espécies Florestais Em Função Do Suprimento De Água No Solo1

et al. 2015

View full text Add to dashboard Cite

RESUMO -A redução da disponibilidade hídrica causa efeitos sobre a fotossíntese e o desenvolvimento de espécies arbóreas. O objetivo deste trabalho foi avaliar as trocas gasosas e a eficiência fotoquímica do fotossistema II em plantas adultas de gonçalo-alves (Astronium fraxinifolium Schott.), guanandi (Calophyllum brasiliense Cambess.), ipê-amarelo (Handroanthus serratifolius (Vahl.), ipê-rosa (Handroanthus impetiginosa (Mart.) Matos), marupá (Simarouba amara Aubl.) e mogno (Swietenia macrophylla King.) cultivadas em condições de sequeiro e irrigadas, no Perímetro Irrigado do Baixo Acaraú, Ceará. O delineamento experimental adotado foi o de medidas repetidas no tempo, num esquema de parcelas subsubdivididas (6 x 2 x 3), sendo a parcela principal composta por seis espécies, a subparcela por dois regimes hídricos (irrigado e sequeiro) e a subsubparcela pelas épocas de avaliação. As análises das trocas gasosas foram realizadas em 22/11/2012 (estação seca), 07/02/ 2013 (data que antecedeu o período chuvoso) e 17/05/2013 (estação chuvosa). As espécies mogno, guanandi e ipê-amarelo mostraram-se mais sensíveis ao déficit hídrico, em comparação com as outras espécies, o que foi evidenciado pelas maiores reduções nas trocas gasosas e na eficiência fotoquímica do fotossistema II. O ipê-rosa, o marupá e o gonçalo-alves mostraram-se mais adaptados às condições de baixa disponibilidade hídrica do solo.Palavras-chave: Estresse hídrico; Plantas lenhosas; Fotossíntese. LEAF GAS EXCHANGE AND EFFICIENCY OF PHOTOSYSTEM II IN ADULT PLANTS OF SIX FOREST SPECIES AS FUNCTION OF THE WATER SUPPLY IN THE SOILABSTRACT -The reduction of water availability causes effects on photosynthesis and the development of tree species. The objective of this study was to evaluate leaf gas exchange and photochemical efficiency of photosystem II in adult plants of gonçalo-alves (Astronium fraxinifolium Schott), guanandi (Calophyllum brasiliense Cambess.), ipê-amarelo (Handroanthus serratifolius (Vahl.), ipê-rosa (Handroanthus impetiginosa (Mart.) Matos.), marupá (Sima roubaamara Aubl.) and mogno (Swietenia macrophylla King.) cultivated in non-irrigated and irrigated conditions, in the Irrigation Perimeter of Baixo Acaraú, Ceará, Brazil. The experimental design was a repeated measures, a scheme of split-plots (6 x 2 x 3), with the plot composed by six plant species, the subplot by two water regimes (irrigated and non-irrigated) and the sub-subplots by evaluation dates. The measurements of leaf gas exchange were made in 11/22/2012 (dry season), 02/ 07/2013 (date that preceded the rainy season) and 05/17/2013 (rainy season). The species mogno, guanandi and ipê-amarelo were more sensitive to drought compared to other species, evidenced by greater reductions in leaf gas exchange and photochemical efficiency of photosystem II. The ipê-rosa, marupá and gonçalo-alves were more adapted to conditions of low soil water availability.

show abstract

“…The processes of water loss by plants are driven by the availability of water in the soil; however, the response is determined by factors such as the available energy and evaporative demand of the atmosphere, as well as the plant's own resistance. Rodrigues et al (2011), in a study on the variability of stomatal conductance in an Amazonian mangrove ecosystem, reported that stomatal conductance proportionally varied to the VPD in the absence of water restriction in the soil. Observing the fluctuations between the SF and TR measurements of the atemoya over the 12-day evaluation period, a maximum of 0.290 L day -1 , minimum TR of 0.025 L day -1 , and average TR of 0.179 L day -1 were confirmed.…”

Section: Resultsmentioning

confidence: 99%

CALIBRATION OF THE THERMAL DISSIPATION PROBE FOR ATEMOYA: (Annona squamosa x A. cherimola)

et al. 2020

View full text Add to dashboard Cite

When determining plant transpiration (TR) using the thermal dissipation probe method, it is necessary to calibrate the sap flow (SF) estimation equation for each species under study, and thus obtain reliable information about the water demand of crops. This study aims to calibrate the equation used to determine SF using the thermal dissipation probe for atemoya cultivation. The experiment was conducted in the experimental field of the Universidade do Estado da Bahia, Juazeiro, Northeast Brazil. Atemoya plants in the initial phase of development were transplanted into 21.5-l pots arranged on weighing platforms that acted as lysimeters. The SF was determined by the thermal dissipation probe method using 1-cm-long probes. The angular coefficient of the Granier equation was adjusted by minimizing the absolute deviations between the accumulated daily SF and TR measured using the lysimeter. The results demonstrated that the application of the Granier method is satisfactory for estimating the TR of the atemoya and that it is necessary to adjust the angular coefficient of the equation. The mean absolute error between SF and TR was 3.1%.

show abstract

Water relations in physic nut according to climatic seasonality, in semiarid conditions

Cited by 6 publications

References 15 publications

Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil

Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil

Trocas Gasosas E Eficiência Do Fotossistema Ii Em Plantas Adultas De Seis Espécies Florestais Em Função Do Suprimento De Água No Solo1

CALIBRATION OF THE THERMAL DISSIPATION PROBE FOR ATEMOYA: (Annona squamosa x A. cherimola)

Contact Info

Product

Resources

About