The effect of cobalt stress on growth and physiological traits and its association with cobalt accumulation in barley genotypes differing in cobalt tolerance |
| |
| Authors: | Jonas Lwalaba Wa Lwalaba Gerald Zvogbo Mamba Mulembo Mukobo Mundende |
| |
| Affiliation: | 1. Key Laboratory of Crop Germplasm Resource, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P.R. China;2. Department of Crops sciences, Faculty of Agronomy, University of Lubumbashi, Lubumbashi, DR Congo;3. Department of Crops sciences, Faculty of Agronomy, University of Lubumbashi, Lubumbashi, DR Congo |
| |
| Abstract: | Cobalt (Co) is beneficial for legume plants and not an essential element for most plants. There is no sufficient information about the effect of Co stress on barley growth. The current experiment was carried out to investigate the effects of different Co levels (25, 50, 75, and 100 µM) on growth and physiological traits of three barley genotypes (B325, J36, and B340) differing in Co tolerance. The results showed that Co stress inhibited plant growth, decreased chlorophyll content and photosynthetic rate, and enhanced oxidative stress. However, the effects differed among genotypes, with B325 and B340 being the most and the least affected, respectively. Co stress caused decrease and increase of manganese (Mn) and phosphorus (P) concentrations in both roots and shoots, respectively; iron (Fe) concentration had little change in shoots and a significant decrease in roots. The current results showed a close association of Co tolerance and its accumulation in plant tissues. |
| |
| Keywords: | barley cobalt genotype tolerance toxicity |
|
|
