Tropicultura (Jan 2007)
Etude de la variabilité intraspécifique de tolérance au stress salin du pois chiche (Cicer arietinum L.) au stade germination
Abstract
Study of the Intra-specific Variability Tolerance to Salt Stress of Chickpea (Cicer arietinum L.) in the Germination Stage. This study aims at comparing the germinative behaviour of some genotypes of chickpea (Cicer arietinum L.), in salt stress. For this, a test has been driven on eight genotypes whose seeds are submitted under different concentrations of NaCl (0; 34; 68 and 102 mM) in a temperature of 26 °C and a relative humidity of 93%. The measures concerned the kinetics, the speed and the final germination rate. The mobilization of the reserves and the reversibility of the effect of salt stress are also studied. The results suggest that the germinative capacity of the genotypes is not affected in 34 mM of NaCl. But in more elevated concentrations, it decreases and the speed of germination shows down. The increase of the salt concentration until 68 and 102 mM hinders the process of mobilization of the reserves and decreases the mean daily germination. The intraspecific variability of chickpea is relatively important. But, in presence as in absence of salt, the FLIP97-254C genotype showed the best germinative behaviour. During germination, salinity has two different effects on the chickpea seeds, the first are osmotic reversible, the second are toxic irreversible.
