Version 1
: Received: 2 November 2023 / Approved: 2 November 2023 / Online: 3 November 2023 (01:32:00 CET)
Version 2
: Received: 5 December 2023 / Approved: 11 December 2023 / Online: 14 December 2023 (12:03:52 CET)
How to cite:
Du, H.; Li, M.; Zhao, S.L.; Fan, S.H.; Yu, H.X.; Luo, J.J.; Peng, F.T. Effects of exogenous amino acids on drought resistance of peach (Prunus persica (L.) Batsch). Preprints2023, 2023110184. https://doi.org/10.20944/preprints202311.0184.v2
Du, H.; Li, M.; Zhao, S.L.; Fan, S.H.; Yu, H.X.; Luo, J.J.; Peng, F.T. Effects of exogenous amino acids on drought resistance of peach (Prunus persica (L.) Batsch). Preprints 2023, 2023110184. https://doi.org/10.20944/preprints202311.0184.v2
Du, H.; Li, M.; Zhao, S.L.; Fan, S.H.; Yu, H.X.; Luo, J.J.; Peng, F.T. Effects of exogenous amino acids on drought resistance of peach (Prunus persica (L.) Batsch). Preprints2023, 2023110184. https://doi.org/10.20944/preprints202311.0184.v2
APA Style
Du, H., Li, M., Zhao, S.L., Fan, S.H., Yu, H.X., Luo, J.J., & Peng, F.T. (2023). Effects of exogenous amino acids on drought resistance of peach (Prunus persica (L.) Batsch). Preprints. https://doi.org/10.20944/preprints202311.0184.v2
Chicago/Turabian Style
Du, H., Jing jing Luo and Fu tian Peng. 2023 "Effects of exogenous amino acids on drought resistance of peach (Prunus persica (L.) Batsch)" Preprints. https://doi.org/10.20944/preprints202311.0184.v2
Abstract
Peach (L.) is a kind of fruit tree with considerable economic and nutritional significance. However, it shows a high sensitivity to drought stress, which has a profound impact on its growth. L-methionine (MET) and L-proline (PRO) are two amino acids synthesized by plants, which play an important role in abiotic stress response. However, their exact mechanism of action remains elusive. Through physiological analysis, MET (500ppm) and PRO (500ppm) treatments can effectively reduce the adverse effects of drought stress on the growth of peach seedlings. The results show that MET and PRO can effectively inhibit the stomatal opening of plant leaves under drought conditions and reduce the water evaporation of leaves under drought conditions. In addition, the application of MET or PRO promoted the accumulation of carbohydrates in the leaf tissues of peach seedlings under drought conditions, increased the intracellular relative water content (24%, 24%), decreased the leaf electrical conductivity (21%, 24%), and alleviated the membrane damage caused by drought. Experimental studies have confirmed that the alleviation of drought stress is due to the removal of reactive oxygen species (ROS) in vivo, that is, the downregulation of malondialdehyde (18%, 19%)，peroxidase (50%, 5%) and superoxide dismutase (12%, 14%) activities. In addition, the application of exogenous amino acids also improved the root morphological structure and root vitality of peach seedlings，which was conducive to absorbing external buffer substances and alleviating drought stress. In summary, the application of exogenous amino acids can effectively alleviate the effects of drought stress on plants and reduce the harm.
Keywords
peach; amino acid; drought stress; osmotic; physiological index
Subject
Biology and Life Sciences, Horticulture
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
