Seed germination of gypsophytes and gypsovags in semi-arid central Spain

Escudero, Adrián; Carnes, Luis F; Pérez-García, Francisco J.

doi:10.1006/jare.1996.0215

Cited by 82 publications

(69 citation statements)

References 26 publications

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“…Our results indicate that optimal germination of most of the taxa analysed occurs at cool temperatures (15°C or alternate 20/10°C), as previously described for several Mediterranean species (e.g. Thanos et al 1995;Escudero et al 1997;Carta et al 2013 Maximum germination at cool temperatures was the prevailing trend. Suppression or reduction of germination at high temperatures could prevent germination during Mediterranean summer months, when occasional rainfall may provide a transient period of conditions suitable for germination but uncertain for seedling establishment due to drought.…”

Section: R a F Tsupporting

confidence: 63%

“…Suppression or reduction of germination at high temperatures could prevent germination during Mediterranean summer months, when occasional rainfall may provide a transient period of conditions suitable for germination but uncertain for seedling establishment due to drought. This strategy associates germination with autumn temperatures and the onset of rainfall, when water availability ensures seedling establishment, and is widely described for Mediterranean species (Thanos et al 1995;Escudero et al 1997;Carta et al 2013). Indeed, even the taxa with a north-eastern distribution range (A. pintadasilvae, J. crispa subsp.…”

Section: R a F Tmentioning

confidence: 99%

“…Database (Liu et al 2008)), as well as in published literature on germination of Mediterranean species (Pérez-García et al 1995;Escudero et al 1997;Doussi and Thanos 2002;Copete et al 2009). When information was available, temperature regimes and pre-treatments to overcome dormancy recommended were applied.…”

Section: Germination Conditions and Pre-treatmentsmentioning

confidence: 99%

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What can routine germination tests in seed banks tell us about the germination ecology of endemic and protected species?

Clemente

Müller

Almeida

et al. 2017

Botany

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Protocols for the conservation of threatened plants are often constrained by the absence of data on germination ecology. However, seed bank managers periodically monitor the viability of stored seed collections using germination tests. Here, we argue that data from those tests can and should be used to provide information on germination requirements of threatened species. Twelve taxa endemic to Portugal were used as a test case to determine the effect of incubation temperature and pretreatments upon germination and to identify major factors eliciting germination and releasing dormancy. We achieved maximum germination percentages >95% for nine taxa. Temperature significantly affected the final germination and mean germination time in most taxa. Maximum and faster germination at cool temperatures (15 °C or alternate 20/10 °C) was the prevailing trend. Cold stratification improved germination in one species, suggesting physiological dormancy. Scarification increased the germination percentage of one species among those expected to exhibit physical dormancy. Seed bank data provided valuable information on germination ecology, which can be used in in-situ conservation and as a baseline for further germination studies. Given the increasing threats to plant diversity, accessibility to seed bank data are paramount.

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Section: R a F Tsupporting

confidence: 63%

Section: R a F Tmentioning

confidence: 99%

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What can routine germination tests in seed banks tell us about the germination ecology of endemic and protected species?

Clemente

Müller

Almeida

et al. 2017

Botany

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“…En contraste con nuestros resultados de germinación, los estudios de Pérez- García et al (1995), Escudero et al (1997) …”

Section: Resultados Y Discusión Porcentaje De Emergencia De Plántulasunclassified

Germinación y establecimiento de plantas nativas del matorral tamaulipeco y una especie introducida en un gradiente de elevación

Pérez¹,

Calderón²,

Castillón³

et al. 2016

MYB

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RESUMENCon el fin de determinar si el calentamiento global podría influir en la ampliación altitudinal de hábitat en el noreste de México, se evaluó la germinación y el crecimiento de cuatro especies de plantas en un gradiente de elevación de 90 a 1960 msnm. Los individuos incluyeron tres especies nativas (Cordia boissieri, Ebenopsis ebano y Caesalpinia mexicana) y una introducida, naturalizada en la región (Melia azederach). Se pusieron a germinar en contenedores, semillas de las cuatro especies durante cuatro veces (primavera 2003, 2004; otoño 2003 y 2004), en cinco elevaciones (90, 350, 520, 1,600 y 1,960 msnm). Las tres elevaciones más bajas incluyen el rango de distribución actual de las especies, y es en éstas en donde en general se presentó la mayor germinación para todas las especies. Para C. boissieri fue en las elevaciones de 350, 520 y 1600 msnm. Para E. ebano y C. mexicana se obtuvo en 90, 350, 520 y 1600 msnm, y para M. azederach ocurrió a 90, 350, 520 msnm. Además, tanto el crecimiento de las plántulas en altura, como el número de hojas producidas, fueron en general superiores en las elevaciones con mayor porcentaje de germinación. Los resultados sugieren que las especies estudiadas tienen la capacidad para germinar y crecer por encima de su área de distribución actual. PALABRAS CLAVE:Calentamiento global, elevación, especie exótica, germinación, plantas nativas. ABSTRACTGermination and growth of four plant species were evaluated from 90 to 1960 m above sea level, with the aim to determine whether global warming could influence growth at higher elevations in northeastern Mexico. Three native species (Cordia boissieri, Ebenopsis ebano and Caesalpinia mexicana) and a naturalized species (Melia azederach) were tested. Seeds were set to germinate in containers four times (Spring 2003, Autumn 2003 at five elevations (90, 350, 520, 1600 and 1960 m above sea level). The lowest three elevations encompass the current distribution range of the species, and it was in these elevations that in general germination percentage was higher across species. The highest germination for C. boissieri occurred at 350, 520 and 1600 m above sea level. Highest germination for E. ebano and C. mexicana occurred at 90, 350, 520 and 1600 m above sea level. The highest germination for M. azederach occurred at 90, 350 and 520 m above sea level. In addition, seedling growth and number of leaves produced by seedlings were, in general higher at elevations with highest germination percentages. Results presented here suggest that plant species studied have the capacity to germinate and grow at higher elevations from their current distribution.

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“…The effect of treatments on the seed germination (5 seeds/dish, 10 dishes for each treatment) was monitored over time (until the 41 st day) and described through the analysis of two parameters: the percentage germination and the germination rate expressed through T 50 parameter, which can be defined as the time required for germination of half final germinated seeds [15][16]. As regards shoot development, the number of explants which differentiated new shoots and their length (mean values ± SE n=21) were recorded at the 10 th and 20 th day of culture on both proliferation media with and without GA 3 .…”

Section: Growth Measurementsmentioning

confidence: 99%

Cytisus aeolicus Guss. ex Lindl. in vitro cultures and genistin production

et al. 2010

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Cytisus aeolicus Guss. ex Lindl. (Fabaceae family, subfamily Faboideae) is an endangered endemic species of the Aeolian Islands, Sicily. In vitro multiplication of C. aeolicus shoots was described in this work and cell cultures were established from cotyledons and hypocotyls to investigate their potential production of isoflavones. Aseptically germinated seeds, cultivated on LS modified basal medium, gave the initial explants used both to induce axillary propagation and callus cultures. The LS (Linsmaier and Skoog) basal medium, supplemented with 0.1 mg L -1 of 6-benzylaminopurine were used to induce axillary propagation. The callus induction was performed using the basal medium added with 5 mg L -1 2,4-dichlorophenoxy acetic acid and 5 mg L -1 kinetin (control medium). Basal medium was also added with 2000 mg L -1 casein hydrolysate (CH) or 900 mg L -1 myo-inositol (MI). C. aeolicus callus cultures on CH and MI media produced an unique compound, the isoflavone genistein 7-O-ß-D-glucopyranoside (genistin), which has not previously been isolated from wild plants. Callus cultures grown on the medium containing myo-inositol produced the greatest amount of genistin. C. aeolicus tissue culture procedures could provide suitable plant material both for germplasm preservation (by micropropagation) and for biotechnological selective isoflavone production (by callus culture).

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Seed germination of gypsophytes and gypsovags in semi-arid central Spain

Cited by 82 publications

References 26 publications

What can routine germination tests in seed banks tell us about the germination ecology of endemic and protected species?

What can routine germination tests in seed banks tell us about the germination ecology of endemic and protected species?

Germinación y establecimiento de plantas nativas del matorral tamaulipeco y una especie introducida en un gradiente de elevación

Cytisus aeolicus Guss. ex Lindl. in vitro cultures and genistin production

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