A large amount of K + efflux, intracellular K + content decreased, which is the early response of cells to salt stress. In the K + salt balance mechanism has an important role to reduce the K + efflux capacity can be increased salt tolerance of plants. After the salt stress, the amino acid content of the plant increases, while the amino acid content increases and K + What is the relationship between this issue has not been studied.
In recent years, Australian scientists have studied the effects of 26 amino acids on NaCl-induced K + flow rate in barley root epidermis using non-invasive micro-test techniques . It was found that 21 amino acids significantly slowed NaCl-induced K + outflow, but proline And ornithine significantly promoted the K + outflow. By adjusting the results indicate that free amino acids in the transmembrane transport of K + improved adaptation of plants to salt stress. Thus, to maintain a proper K + / Na + ratio is critical to alleviate the symptoms of salt stress, and the ability of the cells to function most amino acids K + / Na + maintained.
Through the study of environmental stimuli by cells, we have discovered changes in certain substances, so that the use of this substance for exogenous treatment of cells is an important way to study the salt-tolerant mechanism and improve the salt tolerance of plants, while using non-invasive micro-testing techniques. Real-time, label-free determination of the flow rate of other ions such as K
+ can simplify and accelerate our understanding of ion effects to better study salt stress.
Key words: amino acid, membrane, K + balance, stress, adaptation
References: Cuin TA, Shabala S. Planta, 2007, 225: 753 - 761.
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