Influence of high environmental temperature ability of seeds from the genus of oaks (Quercus)

Abstract

This work describes the effects of high temperatures and fire simulations in nature (100°C for 5min) on the viability of oak genus seeds. In this work, germination of five oak seed genotypes has been studied by the standard method. The result is presented with the help of quantitative indicators of germination (technical germination, vigor). To study the relationship of analyzed characteristics, Two Factorial Analysis of Variance was used as well as the Fisher's Least Significant Difference Test for the significance level a0,05. The aim of the research is to investigate the tolerance of analyzed oak seed genotypes on fires in the environment, which is important both for natural regeneration and for seedling production. Both analyzes show differences between the two genotypes in germination of acorns, and the significant influence of the applied treatment. Also, differences between the genotypes in terms of reaction on the high-temperature treatment are very clear, emphasizing the genotype 2 (close to 50% of technical germination after treatment). Comparison of thermally untreated and treated seed shows differences between genotypes. Generally speaking, oak acorns showed sensitivity on the heat treatment (100°C for 5min) regarding germination. Low germination of oak seed exposed to stressful conditions reduces its potential for natural spreading in the forest environment. These results are important for further research of oak seed tolerance on fires in the environment. © 2014 University of Bucharest.