Effects of light/darkness, thermal shocks and inhibitory components on germination of Pinus canariensis, Pinus halepensis and Pinus pinea

Calvo, Leonor; García-Domínguez, Celia; Naranjo, Agustín; Arévalo, José Ramón

doi:10.1007/s10342-013-0729-7

Cited by 6 publications

(5 citation statements)

References 44 publications

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“…When the 110 °C treatment was applied, germination rate was nearly 1% and even less for temperatures of 150 °C or higher. Escudero et al (1999), Calvo et al (2013) and Moya et al (2013) reportes similar results for Pinus germination, with very sharp reductions caused by high fire temperatures.…”

Section: Iforest -Biogeosciences and Forestrysupporting

confidence: 57%

Role of serotiny on Pinus pinaster Aiton germination and its relation to mother plant age and fire severity

Cruz¹,

García-Duro²,

Casal³

et al. 2019

iForest

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Serotiny degree may hypothetically depend on mother plant age and fire severity, and fire severity can strongly affect the regeneration of Pinus pinaster Aiton, which is an obligate seeder species with aerial seed banks stocked in cones showing a certain degree of serotiny. The main objective of this study was to evaluate the effect of serotiny and mother plant age on seed germination of P. pinaster in relation to fire severity. For this purpose, cones were collected in two stands from mother trees of different ages. Serotinous cones were opened in oven at increasing temperatures to determine the number of seeds released. The length of cones and the number and weight of seeds were measured. Seeds from both classes of mother plant age were subjected to 34 different treatments simulating different fire severity levels, and their germination was recorded. The results showed that serotiny was significantly higher in cones from young mother trees. Seed germination in the control groups from serotinous cones was always higher than that from non-serotinous cones without thermal shock. Fire severity decreased seed germination as fire severity increases in both mother age classes. Mother plant age was related to the serotiny level, which was higher in young than in old trees, suggesting a strong selection in the population due to a recent fire.

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Section: Iforest -Biogeosciences and Forestrysupporting

confidence: 57%

Role of serotiny on Pinus pinaster Aiton germination and its relation to mother plant age and fire severity

Cruz¹,

García-Duro²,

Casal³

et al. 2019

iForest

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“…This cone opening has also been detected in warm and dry periods at any time of the year (García-del-Rey et al 2011). In our field research, germination rate from released seeds was 2-18 %, a much lower value compared with germination rates measured under laboratory conditions (20-80 %) (Escudero et al 2002;Calvo et al 2013). However, this is a typical value for species with recalcitrant seeds in field conditions, which are viable only the first months after release, as is the case for P. halepensis (Daskalakou and Thanos 1996).…”

Section: Discussioncontrasting

confidence: 60%

Understanding long-term post-fire regeneration of a fire-resistant pine species

Méndez

Morales

Nascimento

et al. 2015

Annals of Forest Science

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“…The natural regeneration of P. halepensis stands depends exclusively upon seeds; their ecophysiological characteristics of germination were considered as of great importance in conservation of Mediterranean forest ecosystems. In unstressed circumstances, the seeds of P. halepensis are well recognized to emerge easily without specific environmental constraints (Tsitsoni 2009, Calvo et al 2013. Temperature is considered to be the most important factors affecting the rate and speed of germinability, which directly affects the biochemical and enzymatic activities involved in the germination processes (reserve mobilization and radicle emergence) (Mazliak 1998).…”

Section: Resultsmentioning

confidence: 99%

“…To examine the tolerance of Spanish P. halepensis to heat temperatures, Martínez-Sánchez et al (1995) demonstrated that heating of cones for 1 minute at 90, 110, 150 and 200°C did not affect seed viability. In this way, Calvo et al (2013) indicated that seed viability and post-fire regeneration could give P. halepensis an advantage to cope with wildfires compared to P. canariensis seeds.…”

Section: Introductionmentioning

confidence: 95%

Salinity and temperature influencing seed germination of Mediterranean Aleppo pine (Pinus halepensis Mill.): an ecological adaptation to saline environments

Nedjimi

2021

BALT FOR

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In Mediterranean basin, Pinus halepensis Mill. is the dominant conifer used in afforestation and landscape projects. The ecological, aesthetic and commercial benefits make this conifer a precious tree for both woody production and land rehabilitation. Nevertheless, detailed studies on the adaptation of this tree to abiotic environmental constraints in the Mediterranean areas remain limited up until now. Therefore, laboratory experiments were conducted to assess the effects of the interactive impact of temperatures and salinity on the germinability potential of P. halepensis seeds. The cones of P. halepensis used in this experiment were harvested from the Gotaïa forest at Djelfa province, Algeria. The seeds were removed from their cones and surface-sterilized by soaking for five min in 10% NaClO. Seeds were germinated at three temperature regimes (10–20 °C, 15–25 °C and 20–30 °C) and four levels of salinity (0, 50, 100, and 150 mM NaCl) at photoperiodic lighting (16 h of light : 8 h of dark). For each treatment 04 replicates of 25 seeds were placed in Petri dish with 5 ml of test solutions. A completely randomized design (CRD) was used for the experiment. Results revealed that the uppermost germinability was recorded in distilled H2O and the progressive enhancement of NaCl significantly (P < 0.001) suppressed germination. At 15–25 °C (dark : light thermoperiod), P. halepensis seeds showed approximately 90% of germination at 0 mM NaCl. However less germination percentage (GP) was obtained at 10–20 °C and 20–30 °C. Values of Timson’s index were also suppressed significantly (P < 0.001) with an increase under salt stress at all thermoperiods but at least at 15–25 °C. These funding suggest that seeding of P. halepensis may be an effective path for rehabilitation of degraded lands where salinity and drought are major features of the arid ecosystems. Yet, this conclusion still needs verification by field experiments. Key words: Pinus halepensis; arid zones; sowing dates; afforestation; salt tolerance

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Effects of light/darkness, thermal shocks and inhibitory components on germination of Pinus canariensis, Pinus halepensis and Pinus pinea

Cited by 6 publications

References 44 publications

Role of serotiny on Pinus pinaster Aiton germination and its relation to mother plant age and fire severity

Role of serotiny on Pinus pinaster Aiton germination and its relation to mother plant age and fire severity

Understanding long-term post-fire regeneration of a fire-resistant pine species

Salinity and temperature influencing seed germination of Mediterranean Aleppo pine (Pinus halepensis Mill.): an ecological adaptation to saline environments

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