Effects of heavy metals on the germination and radicle growth of halophytes species (Atriplex halimus L.)
September 12, 2022
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| Article Title: | Effects of heavy metals on the germination and radicle growth of halophytes species (Atriplex halimus L.) |
| Authors: | Souahi H., Chebout A., Assal N. |
| Affiliation: | University of Larbi Tebessi, Faculty of Exact Sciences and Natural and Life Sciences, Tebessa 12002, Algeria University of Larbi Tebessi, Faculty of Exact Sciences and Natural and Life Sciences, Biomolecules and Application Laboratory, 12002 Tebessa, Algeria |
| Abstract: | The present work deals with the effect of three heavy metals on germination of Atriplex halimus L. seeds. The experiments were conducted during 10 days, under strictly controlled laboratory conditions. Precocity of germination (PG), Germination Percentage (GP), Kinetics of germination, Germination index (GI) and Radicle length (RL) were estimated. The results showed that Kinetics of germination, GI and RL were significantly affected by heavy metal stress. In contrast, the increase of applied heavy metal dose resulted in prolongation of GI, and therefore, in significant decrease in RL. Root growth is more sensitive to metals than germination; the inhibitory effect of cadmium (Cd) on growth is earlier than those of zinc (Zn) and lead (Pb). It should be noted that A. halimus L. seeds were able to germinate even at 8000 ppm, which is a concentration higher than critical limits for agricultural soils and irrigation water. This suggests that it could be considered as a moderately tolerant species, at least during the germination phase, to metal stress. |
| Keywords: | abiotic stress, Atriplex halimus L, germination, heavy metal, seeds |
| *Correspondence: | Hana Souahi, University of Larbi Tebessi, Faculty of Exact Sciences and Natural and Life Sciences, Tebessa 12002, Algeria; hana.souahi@univ-tebessa.dz |
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