scholarly journals Seed germination of Bowdichia virgilioides Kunth, under water stress

2001 ◽  
Vol 5 (1) ◽  
pp. 115-118 ◽  
Author(s):  
Lígia M. de M. Silva ◽  
Ivor B. de Aguiar ◽  
Teresinha de J.D. Rodrigues
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Sulphuric Acid ◽  
Stress Resistance ◽  
Water Availability ◽  
Tree Species ◽  
Native Tree ◽  
Drought Conditions ◽  
Native Tree Species ◽  
Osmotic Potentials

Bowdichia virgilioides (Leguminosae-Papilionoideae) is a native tree species in Brazil characteristic of the savannah vegetation. Seeds of this species were submitted to different osmotic potentials induced by polyethyleneglycol (PEG-6000) in order to verify their resistance to drought conditions. Seeds were previously scarified with sulphuric acid and incubated at 25 ºC with an eight hours photoperiod, at osmotic potentials of 0.0, -0.1, -0.3, -0.5, -0.7, -0.9 and -1.1 MPa. It was found that water stress resistance limit ranged from -0.7 to -0.9 MPa. Significant reduction in germination velocity from -0.3 MPa, and final percentage of germination from -0.5 MPa in relation to control, were observed. Germination under drastic conditions of water stress was inhibited, but was restored with an increase of water availability.

scholarly journals Effects of storage on seed germination and viability for three native tree species of Ecuador

Trees ◽  
2020 ◽  
Vol 34 (6) ◽  
pp. 1487-1497
Author(s):  
Ximena Palomeque ◽  
Claudia Patiño Uyaguari ◽  
Franklin Marín ◽  
Mishel Palacios ◽  
Bernd Stimm
Keyword(s):  
Seed Germination ◽  
Tree Species ◽  
Native Tree ◽  
Native Tree Species

scholarly journals Responses of Native Tree Species to Soil Water Stress in a Tropical Forest on Limestone, Vietnam

2015 ◽  
Vol 05 (07) ◽  
pp. 711-722
Author(s):  
Le Van Binh ◽  
Nguyen Van Thinh ◽  
Reinhard Köpp ◽  
Vo Dai Hai ◽  
Ralph Mitlöhner
Keyword(s):  
Water Stress ◽  
Tropical Forest ◽  
Soil Water ◽  
Tree Species ◽  
Soil Water Stress ◽  
Native Tree ◽  
Native Tree Species

scholarly journals Interference of Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae) on the establishment of rainforest trees

2010 ◽  
Vol 70 (2) ◽  
pp. 311-316 ◽  
Author(s):  
DM. Silva Matos ◽  
TA. Belinato
Keyword(s):  
Seed Germination ◽  
Tree Species ◽  
Field Experiments ◽  
Inhibitory Effect ◽  
Seedling Morphology ◽  
Secondary Species ◽  
Native Tree ◽  
Native Tree Species

In order to identify the effect of P. arachnoideum, we studied 11 native tree species commonly used in reforestation projects. Bioassays were conducted in laboratory to evaluate the effect of bracken leachate on the germination and morphology of seedlings. Juveniles of some of these species were planted in two adjacent but contrasting areas in relation to the dominance of P. arachnoideum. The evaluation of growth and survivorship was performed after six and twelve months. This study reveals that for some pioneer and secondary trees P. arachnoideum leachate exerted an inhibitory effect on seed germination and seedling morphology. Field experiments revealed that pioneers are apparently more resistant to P. arachnoideum leachate than secondary species.

scholarly journals Does discontinuous hydration of Senna spectabilis (DC.) H.S. Irwin & Barneby var. excelsa (Schrad.) H.S. Irwin & Barneby (Fabaceae) seeds confer tolerance to water stress during seed germination?

2018 ◽  
Vol 40 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Ayslan Trindade Lima ◽  
Paulo Henrique de Jesus da Cunha ◽  
Bárbara França Dantas ◽  
Marcos Vinicius Meiado
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Stress Conditions ◽  
Hydration Time ◽  
Senna Spectabilis ◽  
Mean Germination Time ◽  
Polyethylene Glycol 6000 ◽  
Osmotic Potentials ◽  
Germination Parameters ◽  
Hydration And Dehydration

Abstract: Seed hydration memory is the ability of seeds to retain biochemical and physiological changes caused by discontinuous hydration. This study aimed to determine if Senna spectabilis (DC.) H.S. Irwin & Barneby var. excelsa (Schrad.) H.S.Irwin & Barneby (Fabaceae) present seed memory and evaluate the effects of hydration and dehydration cycles (HD) on the seed germination of this species when submitted to conditions of water stress. Seeds underwent HD cycles (0, 1, 2 and 3 cycles) corresponding to the hydration times X (6 hours), Y (16 hours) and Z (24 hours), determined from the imbibition curve, with 5 hours of dehydration and submitted to water stress conditions. Germination was evaluated at 0.0, -0.1, -0.3, -0.6 and -0.9 MPa, obtained with polyethylene glycol 6000 solution. Germinability (%), mean germination time (days) and hydrotime (MPa d-1) were calculated. The seeds of S. spectabilis var. excelsa are sensitive to the low osmotic potentials tested in this study, however, when submitted to the HD cycles of 16 hours hydration (time Y), the tolerance to water stress conditions is increased. In addition, the observed benefits on the evaluated germination parameters show that S. spectabilis var. excelsa present seed hydation memory.

Diné kinship as a framework for conserving native tree species in climate change

2019 ◽  
Vol 29 (6) ◽  
Author(s):  
Jaime O. Yazzie ◽  
Peter Z. Fulé ◽  
Yeon‐Su Kim ◽  
Andrew Sánchez Meador
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Native Tree ◽  
Native Tree Species

scholarly journals Responses of Transplanted Native Tree Species to Invasive Alien Grass Removals in an Abandoned Cattle Pasture in the Lacandon Region, Mexico

2012 ◽  
Vol 5 (2) ◽  
pp. 192-207 ◽  
Author(s):  
Francisco J. Román-Dañobeytia ◽  
Jorge Castellanos-Albores ◽  
Samuel I. Levy-Tacher ◽  
James Aronson ◽  
Neptalí Ramírez-Marcial ◽  
...  
Keyword(s):  
Tree Species ◽  
Native Tree ◽  
Cattle Pasture ◽  
Native Tree Species
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