Germination Responses of Terminalia superba Engl. and Diels Seeds on the 2-Way Grant’s Thermogradient Plate

Asomaning, Joseph M.; Sacandé, M.; Olympio, Nana S.

doi:10.3923/rjss.2011.28.39

Cited by 7 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the similar sigmoidal shape for the germination course of a seed population, differences are visible between different temperatures across the thermal-tolerance range of any crop (Garcia-Huidobro, Monteith, and Squire 1982;Asomaning, Sacande, and Olympio 2011;Pourreza and Bahrani 2012): (a) the lag phase does not always have the same duration; (b) the rate of increase during the rapid growth period is smaller at lower temperatures; and (c) final germination is lower when temperatures are closer to the thermal extremes of the respective tolerance range. To establish the sowing time that optimizes the germination of a given crop, it is useful to know the temperature range that ensures minimum dispersion values or acceptable values from the farmers' point of view, rather than finding only a single temperature that minimizes dispersion.…”

Section: Introductionmentioning

confidence: 99%

Modeling the spread of germination of four Mediterranean crops at different temperatures

Andrade

Cadima

Abreu

2019

Journal of Crop Improvement

View full text Add to dashboard Cite

Minimizing the dispersion of germination across time allows greater uniformity during crop development. The aim of this paper was to model the spread of germination, under nonlimiting water conditions and as a function of temperature, of four Mediterranean crops: pea (Pisum sativum L.), broad bean (Vicia faba L.), corn (Zea mays L.) and sorghum (Sorghum vulgare L.). Experiments were performed using a thermogradient plate. Four temperature ranges suitable for the thermal responses of each crop were used. Dispersion was expressed as standard deviation (σ) of the frequency distribution of thermal times in the population, modeled by a probit regression and by differences between both accumulated temperatures above the base temperature (θ 0.8-θ 0.2) or chronological times (t 0.8-t 0.2) required to reach 0.2 and 0.8 of final germination. Estimates of σ were obtained both within thermal ranges defined by applying the plateau-shaped model to the rate vs. temperature relationship and at single temperatures. The differences (θ 0.8-θ 0.2) and (t 0.8-t 0.2) were evaluated for each temperature. Reference values were successfully assigned to the germination dispersion of each crop, either to the different thermal ranges used or to single temperatures. Furthermore, a thermal range ensuring minimum values of dispersion was obtained for each crop using a polynomial equation to model the variation of t 0.8-t 0.2 on the set of temperatures used. The dimension of this thermal range was larger for winter than for summer crops. Crop competitiveness depends on the indicators used to assess dispersion. The results allow farmers to choose between different crops and thus optimize germination.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling the spread of germination of four Mediterranean crops at different temperatures

Andrade

Cadima

Abreu

2019

Journal of Crop Improvement

View full text Add to dashboard Cite

show abstract

“…The best constant temperature for germination of Terminalia superba, Combretaceae family, is 35˚C/35˚C and the best temperature combinations at alternating temperatures were 35˚C/40˚C (100% germination), 35˚C/15˚C (95%), 40˚C/25˚C (95%), 20˚C/40˚C and 40˚C/30˚C (92.5%) [20].…”

Section: Resultsmentioning

confidence: 99%

Germination Response of Ornamental Pine Seeds on a Two-Way Thermogradient Plate

Ferraz¹,

Pivetta²,

Pritchard³

et al. 2018

AJPS

View full text Add to dashboard Cite

The objective of this study was to evaluate the effect of temperature on germination of Pinus tabuliformis Carrière seed, Pinus gerardiana Wall. ex D. Don and Pinus roxburghii Sarg. Seeds of three species were distributed in Petri dishes with 1% agar solution; for the first step it was placed on a 2-way Grant's thermogradient plate (a bi-directional incubator) for a period of 28 days and during the second step in an incubator type B.O.D. also for 28 days with non-germinated seeds in the first step. This instrument allows an assessment of a wide regime of constant and alternating temperatures, resulting to 144 different combinations of temperature, scheduled to the temperatures 4˚C -40˚C. The lighting regime was 12 hours photoperiod for the two stages of the experiment. The best temperature for the germination of P. tabuliformis was 26.2˚C (minimum of 7.9˚C and maximum 37.0˚C) and P. roxburghii was 15.6˚C (minimum 10, 4˚C and maximum 37.0˚C). The seeds are neutral photoblastic. P. gerardiana showed low germination percentage (below 10%). The temperature that provided the highest germination percentage for P. tabuliformis was 26.2˚C and 15.6˚C for P. roxburghii.

show abstract

“…Terminalia mantaly is a very popular tree in Nigeria, planted in almost every institutional setup and street because of its far-reaching branches that provide shade (Asomaning et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of dormancy breaking efficiency in Terminalia mantaly seeds using microorganisms and conventional pre-treatment methods

G Okon,

Rhouma,

E Okon

et al. 2024

Discov. agric.

View full text Add to dashboard Cite

This study was carried out to comparatively look at the most efficient methods of dormancy breaking in Terminalia mantaly using microorganisms (Lasiodiplodia theobromae, Candida sp., and Aspergillus spp.), chilling, heating, 1% HCl, scarification, and Dil. H2SO4. Analysis of seed germination percentages (PGS) over 5-31 days revealed that T. mantaly seeds treated with 1% HCl exhibited the highest PGS (86.66%), followed by L. theobromae (66.66%), Candida sp. (60%), and untreated controls (46.66%). The treatment using Aspergillus spp. resulted in moderate PGS (40%), while scarification yielded the lowest PGS (13.33%). Notably, chilling, heat, and diluted sulfuric acid treatments did not achieve any seed germination within the 31-day period. T. mantaly seeds subjected to treatments with L. theobromae, Candida sp., and Aspergillus spp. demonstrated precocious germination (5-7 days after treatment). L. theobromae treatment exhibited the highest speed germination index (SGI) (2.91), followed by 1% HCl (2.62), and Candida sp. However, chilling, heating, and diluted sulfuric acid treatments recorded no germination and, consequently, no SGI. These results suggest that T. mantaly seeds treated with the microbial isolates and 1% HCl demonstrated enhanced dormancy breaking and germination, as reflected by higher PGS and SGI. This research contributes to our understanding of T. mantaly germination biology by highlighting the potential of microorganisms and hydrochloric acid in overcoming seed coat dormancy, particularly in species with hardened seeds. This opens new avenues for exploring their use in promoting successful germination and enhancing plant establishment.

show abstract

Germination Responses of Terminalia superba Engl. and Diels Seeds on the 2-Way Grant’s Thermogradient Plate

Cited by 7 publications

References 1 publication

Modeling the spread of germination of four Mediterranean crops at different temperatures

Modeling the spread of germination of four Mediterranean crops at different temperatures

Germination Response of Ornamental Pine Seeds on a Two-Way Thermogradient Plate

Comparative study of dormancy breaking efficiency in Terminalia mantaly seeds using microorganisms and conventional pre-treatment methods

Contact Info

Product

Resources

About