Inicio  /  Forest Systems  /  Vol: 23 Núm: 3 Par: 0 (2014)  /  Artículo
ARTÍCULO
TITULO

Effect of seed mass and number of cotyledons on seed germination after heat treatment in Pinus sylvestris L. var. iberica Svob.

Elena Castoldi    
Jose A. Molina    

Resumen

Aim of study: We investigated the combined effect of seed mass and number of cotyledons on the seed germination of Pinus sylvestris var. iberica (Iberian Scots pine) in simulated fire conditions.Material and Methods: We used 3,600 fresh seeds extracted from 158 cones obtained from 10 pine trees located at the Biological Station of the Complutense University (Guadarrama mountains, Madrid region). All the seeds were individually weighed and assigned to one of the two following seed mass classes: class I (1.6-12.5 mg) and class II (12.6-145.0 mg). Germination capacity (GC) and mean germination time (MGT) were studied in combined experiments of four different temperatures (100°, 125°, 150° and 175°C) and two exposure times (1 and 5 minutes) together with a control (no treatment). Four replicates of 50 seeds each were used for each treatment and hydrated daily for 14 days to germinate under constant illumination. The number of cotyledons was counted in seedlings.Main results: Germination was depressed at above 125°C for 5 min. GC and MGT were negatively related, and were influenced by temperature and exposure time. Seed mass was found to have a significant effect on GC at some moderate heat treatment but not on MGT. The number of cotyledons was positively correlated to seed mass but there was not found correlated with germination after seed heat treatments.Research highlights: In the case of the Iberian Scots pine, higher seed mass mitigate the negative effects of temperature on seed germination after moderate heat treatment simulating fire.Keywords: Fire disturbance; germination; Mediterranean mountains; Pinus sylvestris L. var. Iberica; temperature.

 Artículos similares

       
 
Zhixiang Tian, Jingchong Li, Fulong Zhang, Li Xu, Feng Zhou, Lin Zhou, Hongliang Wang and Runqiang Liu    
Physcion can induce plant resistance to disease, and is registered to control powdery mildew by spraying in China. Seed coating is a widely applied precision method for pest prevention and control. To explore its potential in disease control and yield in... ver más
Revista: Agriculture

 
Anita Bo?njak Mihovilovic, Snje?ana Kere?a, Boris Lazarevic, Snje?ana Topolovec Pintaric, Katarina Martinko, Zvjezdana Markovic, Katarina Turkalj and Ivanka Habu? Jercic    
In vitro plants that are free of pathogens are crucial for biotechnological breeding methods. The present study investigates the effects of sterilization with sodium hypochlorite (NaClO) and the addition of Plant Preservative Mixture (PPMTM) to the growt... ver más
Revista: Agriculture

 
Martin Kmoch, Josef Vacek, Vera Loubová, Karel Petrzik, Sára Brázdová and Rudolf ?evcík    
Pectinolytic bacteria of the family Enterobacteriaceae, specifically Dickeya solani, are known to cause potato blackleg. This study aimed to evaluate the effectiveness of a mixture of two bacteriophages from the genus Limestonevirus in controlling Dickey... ver más
Revista: Agriculture

 
Zain Abbas, Muhammad Ahmad Hassan, Weidong Huang, Haibing Yu, Mengqin Xu, Xiaoyu Chang, Xisheng Fang and Liqin Liu    
An approximate revolution synthesis of magnesium oxide (MgO) nanoparticles has been prepared. For plant growth and development, MgO is essential. The effect and efficiency, respectively, in seed germination, seedling growth, and plant growth were also st... ver más
Revista: Agronomy

 
Bruno F. Fregonezi, Anderson E. S. Pereira, Josué M. Ferreira, Leonardo F. Fraceto, Diego G. Gomes and Halley C. Oliveira    
Water deficit (WD) promotes great losses in agriculture, and the development of new sustainable technologies to mitigate the effects of this stress on plants is essential. This study aimed to evaluate the morphophysiological and biochemical alterations i... ver más
Revista: Agronomy