Plant life-form and germination in a Mexican inter-tropical desert: effects of soil water potential and temperature

Flores, Joel; Briones, Oscar

doi:10.1006/jare.2000.0728

Cited by 106 publications

(69 citation statements)

References 66 publications

(82 reference statements)

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“…Seed germination is affected by light, temperature, and a host of other environmental factors (Bewley & Black, 1994). Temperature during seed imbibitions has been found to influence the germination rate and the ultimate percentage of germination (Flores & Briones, 2001). Since as early as 1860, it has been recognized that three cardinal temperatures (minimum or base temperature T b , optimum temperature, T opt and maximum temperature, T Max ) describe the temperature range over which the seeds of a particular species can germinate (Bewley & Black, 1994).…”

Section: Introductionmentioning

confidence: 99%

CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera

2015

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-Calotropis procera, Apocynaceae, is a wild perennial shrub that originated in the Persian deserts. It is known to provide key resources in degraded ecosystems to about 80 animal species. C. procera is regenerated by seed and produces lots of small seeds that are dispersed by wind; nonetheless, its density is very low. The purpose of this study is to estimate the cardinal temperatures including the base, optimum, and maximum temperatures of Calotropis procera looking at two different ecotypes in the Iranian desert. The germination behavior of C. procera seeds was tested at temperature regimens of 0, 5, 10, 15, 20, 25, 30, 35 and 40 o C and was analyzed using linear regression models. The rate of germination increased between base and optimum thermal conditions, and decreased between optimum and maximum thermal conditions. The base, optimum and maximum temperatures for germination of C. procera seeds were estimated at 19.10, 30.75 and 47.80 o C for the Fars and 20.00, 31.82 and 49.69 o C for the Zahedan desert, respectively. Temperature and germination were rated to determine the seeding dates of the C. procera. Overall, cardinal temperatures for germination were dependent on local climate characteristics for the range of adaptations in plant growth of the given species.

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Section: Introductionmentioning

confidence: 99%

CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera

2015

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“…The specific requirement for seed germination can be associated to the form of life for each species, to the environment where the plant will be established and to the seed mass (Rójas-Aréchiga et al, 1997;Flores and Briones, 2001). According to Pearson et al (2003) small seeds usually respond positively to the light fluences, while large seeds usually respond positively to temperature fluctuations.…”

Section: Introductionmentioning

confidence: 99%

“…In some species, changes in temperatures can overcome light requirement for germination as reported by Sugahara and Takaki (2004) in Psidium guajava. Several studies have been done with species which live in arid environments in Mexico (Gordínez-Alvarez and Valiente-Banuet, 1998;RojasAréchiga et al, 1997RojasAréchiga et al, , 2001Flores and Briones, 2001;Oliveira-Carrillo et al, 2003;Bénitez-Rodríguez et al, 2004, Ramírez-Padilla andValverde, 2005). Usually cactacean species present light sensitive seeds and germinate in a wide range of temperature, being indifferent to changes in temperatures (Oliveira-Carrillo et al, 2003;RojasAréchiga and Vázquez-Yanes, 2000;Bénitez-Rodríguez et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The epiphytic Cactaceae Hylocereus setaceus (Salm-Dick ex DC.) ralf bauer seed germination is controlled by light and temperature

Simão

Socolowski

Takaki

2007

Braz. arch. biol. technol.

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“…Germination was recorded when the seed radicle emerged and was visible (Jurado and Westoby, 1992;Welbaum et al, 1998). From these observations we obtained; (1) germinability, calculated as the percentage of germinated seeds at the end of the experiment (Flores and Jurado, 1998;Flores and Briones, 2001); and (2) Speed of germination or half-time of germination (t 50 ), calculated as the time (in days) at which 50% of the seeds germinated (Grime et al, 1981;Thompson and Grime, 1983;Jurado and Westoby, 1992;Flores and Jurado, 1998;Flores and Briones, 2001;Pérez-Sánchez et al, 2011).…”

Section: Studymentioning

confidence: 99%

Effect of biological soil crusts on the germination of three plant species under laboratory conditions

et al. 2014

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Semiarid grasslands in northeastern Mexico contain endemic plants and animals, and are an important refuge for resident and migratory animals. Here, as in other semiarid areas, biological soil crusts (BSC) are a key component of the ecosystem. However, fi ndings about their effect on the germination of vascular plants are contradictory. We asked whether seed germination of some native plant species would be inhibited by the presence of BSC as it has been found in other studies; in turn, we evaluated the effect of fi ve lichens (Endocarpon pusillum Hedw., Placidium sp., Psora cerebriformis W.A.Weber, Psora decipiens (Hedw.) Hoffm., Xanthoparmelia chlorochroa (Tuck.) Hale), one cyanobacteria (Nostoc commune Vauch.), and one hepatic (Oxymitra sp.), from the dominant BSC of the area on the germination percentage (germinability) and speed of germination (t 50 ) of three native plant species: Frankenia gypsophila I.M.Johnst., Muhlenbergia arenicola Buckl., and Sartwellia mexicana A.Gray. Germination tests were carried out in an environmental chamber at 26 °C and at a constant humidity of 60% with 12:12 hours light and darkness. BSC did not affect germination percentage of the three evaluated plant species when compared to bare soil. Speed of germination ranged between 3.5 and 5 days and there were no differences between substrates. Keywords: Endocarpon pusillum, northeastern Mexico, Nostoc commune, Placidium, semiarid grasslands.Resumen: En los pastizales semiáridos del noreste de México se encuentran plantas y animales endémicos, y son un refugio importante para animales residentes y migratorios. Aquí, como en otras zonas semiáridas, las costras biológicas del suelo son un componente clave del ecosistema. Sin embargo, los reportes sobre su efecto en la germinación de plantas vasculares son contrastantes. En este trabajo se investiga si la germinación de algunas especies de plantas nativas sería inhibida por la presencia de costras biológicas del suelo como se ha encontrado en otros estudios, y se evalúa el efecto de cinco líquenes (Endocarpon pusillum Hedw., Placidium sp., Psora cerebriformis W.A.Weber, Psora decipiens (Hedw.) Hoffm., Xanthoparmelia chlorochroa (Tuck.) Hale), una cianobacteria (Nostoc commune Vauch.) y una hepática (Oxymitra sp.), que son componentes de las costras biológicas del suelo dominantes en el área. Los efectos evaluados son en el porcentaje (germinabilidad) y rapidez de germinación (t 50 ) de tres especies de plantas nativas del área: Frankenia gypsophila I.M.Johnst., Muhlenbergia arenicola Buckl. y Sartwellia mexicana A.Gray. Las pruebas de germinación se realizaron en una cámara ambiental a 26 °C, humedad constante del 60%, 12:12 horas luz: oscuridad. Las costras biológicas no afectaron el porcentaje de germinación de las tres especies de plantas evaluadas comparado con el suelo desnudo. La rapidez de germinación estuvo entre 3.5 y 5 días, sin diferencias entre los sustratos. Palabras clave: Endocarpon pusillum, noreste de México, Nostoc commune, pastizales semiáridos, Placidium.

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Plant life-form and germination in a Mexican inter-tropical desert: effects of soil water potential and temperature

Cited by 106 publications

References 66 publications

CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera

CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera

The epiphytic Cactaceae Hylocereus setaceus (Salm-Dick ex DC.) ralf bauer seed germination is controlled by light and temperature

Effect of biological soil crusts on the germination of three plant species under laboratory conditions

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