scholarly journals Different Growth and Physiological Responses of Six Subtropical Tree Species to Warming

2017 ◽  
Vol 8 ◽  
Author(s):  
Yiyong Li ◽  
Guoyi Zhou ◽  
Juxiu Liu
Keyword(s):  
Tree Species ◽  
Physiological Responses

scholarly journals GROWTH AND PHYSIOLOGICAL RESPONSES OF TREE SPECIES (Hymenaea courbaril L., Peltophorum dubium (Spreng.) Taub. and Myroxylon peruiferum L. F.) EXPOSED TO DIFFERENT COPPER CONCENTRATIONS IN THE SOIL

2018 ◽  
Vol 42 (2) ◽  
Author(s):  
Daniele Maria Marques ◽  
Adriano Bortolotti Silva ◽  
José Ricardo Mantovani ◽  
Dalvana Sousa Pereira ◽  
Thiago Corrêa Souza
Keyword(s):  
Antioxidant Enzymes ◽  
Tree Species ◽  
Copper Content ◽  
Metal Tolerance ◽  
Physiological Responses ◽  
Forest Species ◽  
Hymenaea Courbaril ◽  
Tolerance Strategy ◽  
Photosynthetic Machinery ◽  
Biometric Measurements

ABSTRACT Copper (Cu) is an essential micronutrient for plants. However, when in excess, it becomes phytotoxic. In this context, the objective of this study was to evaluate the growth and physiological responses of tree species exposed to different copper concentrations in the soil. Three experiments were carried out, one for each forest species under study: Myroxylon peruiferum ("Óleo Bálsamo"), Hymenaea courbaril ("Jatobá") and Peltophorum dubium ("Canafístula"), with the same doses of copper (0, 50, 100, 200 and 400 mg kg-1). The experimental design was in randomized blocks (DBC), with five copper concentrations and four replicates. The plants were grown on soil substrate packed in 8-dm3 pots and kept in a greenhouse for 90 days. Biometric measurements, chlorophyll, antioxidant enzymes and copper content in tissues were evaluated. Copper did not influence the vegetative growth of the species studied. The content of chlorophyll "a" was reduced with increasing copper concentrations in the soil. H. courbaril had 56 to 92% copper retained in the roots, and the same behavior was observed for P. dubium (77-91%) and M. peruiferum (19-64%). In the three species studied, there was copper bioaccumulation, mainly in the roots, possibly as a metal tolerance strategy, preserving the most active tissues and the photosynthetic machinery. Cu translocation from roots to shoot was very restricted in all species. This behavior, associated with the increase in the activity of some antioxidant enzymes in plants, may indicate the phytoremediation potential of the studied species.

Physiological responses to flooding and light in two tree species native to the Amazonian floodplains

2012 ◽  
Vol 96 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Daniel Maurenza ◽  
Ricardo A. Marenco ◽  
Pia Parolin ◽  
Maria Teresa F. Piedade
Keyword(s):  
Tree Species ◽  
Physiological Responses

Physiological responses of saplings of Caesalpinia echinata Lam., a Brazilian tree species, under ozone fumigation

2006 ◽  
Vol 63 (2) ◽  
pp. 306-312 ◽  
Author(s):  
Regina M. Moraes ◽  
Patricia Bulbovas ◽  
Cláudia M. Furlan ◽  
Marisa Domingos ◽  
Sérgio T. Meirelles ◽  
...  
Keyword(s):  
Tree Species ◽  
Physiological Responses ◽  
Caesalpinia Echinata

scholarly journals Physiological Responses to Abiotic and Biotic Stress in Forest Trees

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 711 ◽  
Author(s):  
Andrea Polle ◽  
Heinz Rennenberg
Keyword(s):  
Salt Stress ◽  
Tree Species ◽  
Physiological Responses ◽  
Resistance Mechanisms ◽  
Stress Factors ◽  
Special Importance ◽  
Forest Trees ◽  
Special Issue ◽  
Ecological Functions ◽  
Stress Studies

Forests fulfill important ecological functions by sustaining nutrient cycles and providing habitats for a multitude of organisms. They further deliver ecosystem services such as carbon storage, protection from erosion, and wood as an important commodity. Trees have to cope in their environment with a multitude of natural and anthropogenic forms of stress. Resilience and resistance mechanisms to biotic and abiotic stresses are of special importance for long-lived tree species. Since trees exist for many decades or even centuries on the same spot, they have to acclimate their growth and reproduction to constantly changing atmospheric and pedospheric conditions. In this special issue, we invited contributions addressing the physiological responses of forest trees to a wide array of different stress factors. Among the eighteen papers published, seventeen covered drought or salt stress as major environmental cues, highlighting the relevance of this topic in times of climate change. Only one paper studied cold stress [1]. The dominance of drought and salt stress studies underpins the need to understand tree responses to these environmental threats from the molecular to the ecophysiological level. The papers contributing to this Special Issue cover these scientific aspects in different areas of the globe and encompass conifers as well as broadleaf tree species. In addition, two studies deal with bamboo (Phyllostachys sp., [1,2]). Bamboo, although botanically belonging to grasses, was included because its ecological functions and applications are similar to those of trees.

Growth and physiological responses to ozone and mild drought stress of tree species with different ecological requirements

Trees ◽  
2010 ◽  
Vol 24 (4) ◽  
pp. 695-704 ◽  
Author(s):  
Martina Pollastrini ◽  
Rosanna Desotgiu ◽  
Chiara Cascio ◽  
Filippo Bussotti ◽  
Paolo Cherubini ◽  
...  
Keyword(s):  
Drought Stress ◽  
Tree Species ◽  
Physiological Responses ◽  
Ecological Requirements ◽  
Mild Drought

scholarly journals Vehicular emissions effect on the physiology and health status of five tree species in a Bogotá, Colombia urban forest

2020 ◽  
Vol 68 (3) ◽  
Author(s):  
Carolina Ramos-Montaño
Keyword(s):  
Particulate Matter ◽  
Stomatal Conductance ◽  
Leaf Area ◽  
Tree Species ◽  
Physiological Responses ◽  
Photochemical Efficiency ◽  
Specific Leaf Mass ◽  
Leaf Mass ◽  
Vehicle Pollution ◽  
Leaf Symptoms

ABSTRACT. Introduction: Thanks to filtration by foliage, urban trees have a crucial role in air depuration. However, the exposure to pollutants could reduce their health and physiological performance, mainly because of low access to light and clogging of stomata by particulate matter. Objective: The accumulation of particulate matter on leaves (PMAL) and physiological traits of five urban tree species (Croton bogotanus Cuatrec., Eugenia myrtifolia Sims., Ficus soatensis Dugand, Schinus mole L., and Sambucus nigra L.) were quantified in sixty points in Bogotá, with the aims to (1) build a model explaining the PMAL based on traffic variables, (2) establishing the effect of vehicle pollution on physiological and phytosanitary variables, and (3) to evaluate the susceptibility of seedlings and trees to vehicle pollution. Methods: The physiological parameters: photochemical efficiency, stomatal conductance, chlorophyll content, leaf area, and specific leaf mass were measured and correlated with phytosanitary condition, PMAL and traffic variables: number of lanes, vehicular flow and tree-to-avenue distance. Additionally, tree physiological responses were measured in control, residential streets (RS), low traffic avenues (LTA), and high traffic avenues (HTA), and these last were compared with physiology of seedlings planted by three months in HTA. Results: PMAL was strongly associated with physiological responses. Ficus soatensis and C. bogotanus were the species with the maximum and the minimum PMAL. The exposure to traffic increased the photochemical efficiency and specific leaf mass, which could be related to the enrichment of nitrogen and atmospheric CO2. The stomatal conductance followed a bell pattern of low gas exchange in control sites, high values in RS and LTA, and decreasing again in HTA, which suggests an optimization in CO2 fixation at intermediate levels of pollution and susceptibility to stomatal clogging by extreme vehicle emissions. The chlorophyll a/b ratio, leaf area, and specific leaf mass were significantly related to the severity of leaf symptoms, and S. molle was the species with the healthiest leaves in HTA. Seedlings were more susceptible to pollution than trees, and fruits size and seedlings growth were affected by vehicular pollution. Conclusions: Ficus soatensis optimizes particle filtration and C. bogotanus is ideal for planting in HTA, although only as saplings. By contrast, the fast-growing E. myrtifolia and S. nigra seedlings should not be planted in HTA because of susceptibility of pigment contents, leaf area, and stomatal conductance to pollutants. Finally, because of its persistent high stomatal conductance and its low leaf symptoms, S. molle is the species with the best adaptation to vehicle pollution. A complete analysis of interactions among traffic, physiology, and health will help to improve the urban forestry planning. 

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